Merge pull request #17586 from benpicco/dist/tools/topogen-doc

tools/zep_dispatch: document topogen usage

.github/workflows/test-on-iotlab.yml

@@ -33,6 +33,10 @@ jobs:
       fail-fast: false
       matrix:
         boards:
+          - riot: dwm1001
+            iotlab:
+              archi: dwm1001:dw1000
+              site: saclay
           - riot: iotlab-m3
             iotlab:
               archi: m3:at86rf231
@@ -53,10 +57,18 @@ jobs:
             iotlab:
               archi: nrf52832mdk:ble
               site: saclay
+          - riot: nucleo-wl55jc
+            iotlab:
+              archi: nucleo-wl55jc:stm32wl
+              site: grenoble
           - riot: samr21-xpro
             iotlab:
               archi: samr21:at86rf233
               site: saclay
+          - riot: samr34-xpro
+            iotlab:
+              archi: samr34:sx1276
+              site: grenoble
           - riot: b-l072z-lrwan1
             iotlab:
               archi: st-lrwan1:sx1276
@@ -70,10 +82,6 @@ jobs:
     env:
       IOTLAB_NODE: auto
       BUILD_IN_DOCKER: 1
-      # Force .bin files generation because these files are used to flash on IoT-LAB and
-      # because compile_and_test_for_board forces RIOT_CI_BUILD which skip .bin
-      # files generation
-      DOCKER_ENVIRONMENT_CMDLINE: -e BUILD_FILES=\$$\(BINFILE\)
       COMPILE_AND_TEST_FOR_BOARD: ./dist/tools/compile_and_test_for_board/compile_and_test_for_board.py
       COMPILE_AND_TEST_ARGS: --with-test-only --jobs=2 --report-xml
       # Exclude applications that are expected to fail or cannot run on iotlab

.murdock

@@ -585,7 +585,7 @@ basename_list () {
 update_changed_modules() {
     # early out if there's no base commit info
     if [ -z "${CI_BASE_COMMIT}" ]; then
-        exit 0
+        return 0
     fi
 
     # early out if a full build is requested

Makefile.base

@@ -97,8 +97,8 @@ compile-commands: | $(DIRS:%=COMPILE-COMMANDS--%)
 	$(file >>$(BINDIR)/$(MODULE)/compile_cmds.txt,TARGET_ARCH: $(TARGET_ARCH))
 	$(file >>$(BINDIR)/$(MODULE)/compile_cmds.txt,TARGET_ARCH_LLVM: $(TARGET_ARCH_LLVM))
 
-# include makefile snippets for packages in $(USEPKG) that modify GENSRC:
--include $(USEPKG:%=$(RIOTPKG)/%/Makefile.gensrc)
+# include makefile snippets for packages in $(PKG_PATHS) that modify GENSRC:
+-include $(PKG_PATHS:%=%Makefile.gensrc)
 
 GENOBJC     := $(GENSRC:%.c=%.o)
 OBJC_LTO    := $(SRC:%.c=$(BINDIR)/$(MODULE)/%.o)

Makefile.dep

@@ -20,7 +20,7 @@ include $(RIOTBASE)/drivers/Makefile.dep
 -include $(sort $(USEMODULE:%=$(RIOTBASE)/drivers/%/Makefile.dep))
 
 # pull dependencies from packages
--include $(USEPKG:%=$(RIOTPKG)/%/Makefile.dep)
+-include $(PKG_PATHS:%=%Makefile.dep)
 
 ifneq (,$(filter mpu_stack_guard,$(USEMODULE)))
   FEATURES_REQUIRED += cortexm_mpu

Makefile.include

@@ -386,6 +386,17 @@ ifneq (,$(IOTLAB_NODE))
   PROGRAMMER ?= iotlab
   # iotlab uses ELFFILE by default for flashing boards.
   FLASHFILE ?= $(ELFFILE)
+  # RIOT_CI_BUILD disables the build of BINFILE which is required for flashing
+  # on IoT-LAB
+  ifeq (1,$(RIOT_CI_BUILD))
+    BUILD_FILES += $(BINFILE)
+  endif
+  # Disable IOTLAB_NODE if inside Docker to avoid including the
+  # iotlab.single.inc.mk file which is useless there: it's only useful for
+  # flashing and this is done outside of Docker.
+  ifeq (1,$(INSIDE_DOCKER))
+    IOTLAB_NODE :=
+  endif
 endif
 
 # Add standard include directories
@@ -416,6 +427,10 @@ ifeq (1,$(TEST_KCONFIG))
   USEMODULE := $(KCONFIG_MODULES)
   KCONFIG_PACKAGES := $(call lowercase,$(patsubst CONFIG_PACKAGE_%,%,$(filter CONFIG_PACKAGE_%,$(.VARIABLES))))
   USEPKG := $(KCONFIG_PACKAGES)
+
+  # Locate used packages in $(RIOTPKG).
+  PKG_PATHS := $(sort $(foreach dir,$(RIOTPKG),\
+    $(foreach pkg,$(USEPKG),$(dir $(wildcard $(dir)/$(pkg)/Makefile)))))
 else
   # always select provided architecture features
   FEATURES_REQUIRED += $(filter arch_%,$(FEATURES_PROVIDED))
@@ -559,8 +574,8 @@ include $(RIOTBASE)/sys/Makefile.include
 # include Makefile.includes of each driver modules if they exist
 -include $(USEMODULE:%=$(RIOTBASE)/drivers/%/Makefile.include)
 
-# include Makefile.includes for packages in $(USEPKG)
--include $(USEPKG:%=$(RIOTPKG)/%/Makefile.include)
+# include Makefile.includes for packages in $(PKG_PATHS)
+-include $(PKG_PATHS:%=%Makefile.include)
 
 # include external modules configuration
 -include $(EXTERNAL_MODULE_PATHS:%=%/Makefile.include)
@@ -760,31 +775,30 @@ endif
 # The `clean` needs to be serialized before everything else.
 all $(BASELIBS) $(ARCHIVES) $(BUILDDEPS) ..in-docker-container: | $(CLEAN)
 
-.PHONY: pkg-prepare pkg-build pkg-build-%
+.PHONY: pkg-prepare pkg-build
 pkg-prepare:
-	-@for i in $(USEPKG) ; do "$(MAKE)" -C $(RIOTPKG)/$$i prepare ; done
+	-@$(foreach dir,$(PKG_PATHS),"$(MAKE)" -C $(dir) prepare $(NEWLINE))
 
-pkg-build: $(USEPKG:%=pkg-build-%)
-pkg-build-%: $(BUILDDEPS)
-	$(QQ)"$(MAKE)" -C $(RIOTPKG)/$*
+pkg-build: $(BUILDDEPS)
+	$(foreach dir,$(PKG_PATHS),$(QQ)"$(MAKE)" -C $(dir) $(NEWLINE))
 
 clean:
 ifndef MAKE_RESTARTS
-	-@for i in $(USEPKG) ; do "$(MAKE)" -C $(RIOTPKG)/$$i clean ; done
+	-@$(foreach dir,$(PKG_PATHS),"$(MAKE)" -C $(dir) clean $(NEWLINE))
 	-@rm -rf $(BINDIR)
 	-@rm -rf $(SCANBUILD_OUTPUTDIR)
 endif
 
 # Remove intermediates, but keep the .elf, .hex and .map etc.
 clean-intermediates:
-	-@for i in $(USEPKG) ; do "$(MAKE)" -C $(RIOTPKG)/$$i distclean ; done
+	-@$(foreach dir,$(PKG_PATHS),"$(MAKE)" -C $(dir) distclean $(NEWLINE))
 	-@rm -rf $(BINDIR)/*.a $(BINDIR)/*/
 
 clean-pkg:
-	-@for i in $(USEPKG) ; do "$(MAKE)" -C $(RIOTPKG)/$$i distclean ; done
+	-@$(foreach dir,$(PKG_PATHS),"$(MAKE)" -C $(dir) distclean $(NEWLINE))
 
 distclean:
-	-@for i in $(USEPKG) ; do "$(MAKE)" -C $(RIOTPKG)/$$i distclean ; done
+	-@$(foreach dir,$(PKG_PATHS),"$(MAKE)" -C $(dir) distclean $(NEWLINE))
 	-@rm -rf $(BINDIRBASE)
 
 # Include PROGRAMMER_FLASH/PROGRAMMER_RESET variables

boards/cc1352-launchpad/doc.txt

@@ -9,6 +9,8 @@
 2. [Hardware](#cc1352_launchpad_hardware)
 3. [Board pinout](#cc1352_launcpad_pinout)
 4. [Flashing the Device](#cc1352_launchpad_flashing)
+5. [Accessing RIOT shell](#cc1352_launchpad_shell)
+6. [More information](#cc1352_launchpad_moreinfo)
 
 ## <a name="cc1352_launchpad_overview"> Overview </a> &nbsp;[[TOC]](#cc1352_launchpad_toc)
 
@@ -63,6 +65,22 @@ export PROGRAMMER=openocd
 
 Now we can just do `make flash` and `make debug`, this all using OpenOCD.
 
+## <a name="cc1352_launchpad_shell"> Accessing RIOT shell </a> &nbsp;[[TOC]](#cc1352_launchpad_toc)
+
+Default RIOT shell access utilize XDS110 debug probe integrated with launchpad board.
+It provides virtual serials via USB interface - for connecting to RIOT shell, use
+the first one.
+
+If a physical connection to UART is needed, disconnect jumpers RXD and TXD joining
+cc1352 microcontroller with XDS110 and connect UART to pin RXD/DIO12 and TXD/DIO13.
+
+The default baud rate is 115 200 - in both connection types.
+
+@warning Launchpad cc1352 board is not 5V tolerant. Use voltage divider or logic
+level shifter when connecting to 5V UART.
+
+## <a name="cc1352_launchpad_moreinfo"> More information </a> &nbsp;[[TOC]](#cc1352_launchpad_toc)
+
 For detailed information about CC1352R1 MCUs as well as configuring, compiling
 RIOT and installation of flashing tools for CC1352R1 boards,
 see \ref cc26xx_cc13xx_riot.

boards/mulle/board.c

@@ -28,7 +28,8 @@
 #include "periph/spi.h"
 #include "nvram-spi.h"
 #include "nvram.h"
-#include "xtimer.h"
+#include "ztimer.h"
+#include "timex.h"
 #include "vfs.h"
 #include "fs/devfs.h"
 #include "mtd_spi_nor.h"
@@ -115,7 +116,7 @@ void board_init(void)
 
 
     /* NVRAM requires xtimer for timing */
-    xtimer_init();
+    ztimer_init();
 
     /* Initialize NVRAM */
     status = mulle_nvram_init();

boards/nucleo-f767zi/include/periph_conf.h

@@ -198,12 +198,12 @@ static const eth_conf_t eth_config = {
  * @{
  */
 static const adc_conf_t adc_config[] = {
-        {GPIO_PIN(PORT_A, 3), 0, 0},
-        {GPIO_PIN(PORT_C, 0), 0, 1},
-        {GPIO_PIN(PORT_C, 3), 0, 4},
-        {GPIO_PIN(PORT_F, 3), 0, 8},
-        {GPIO_PIN(PORT_F, 5), 0, 11},
-        {GPIO_PIN(PORT_F, 10), 0, 10},
+        {GPIO_PIN(PORT_A, 3), 2, 3},
+        {GPIO_PIN(PORT_C, 0), 2, 10},
+        {GPIO_PIN(PORT_C, 3), 2, 13},
+        {GPIO_PIN(PORT_F, 3), 2, 9},
+        {GPIO_PIN(PORT_F, 5), 2, 15},
+        {GPIO_PIN(PORT_F, 10), 2, 8},
 };
 
 #define ADC_NUMOF           ARRAY_SIZE(adc_config)

boards/p-nucleo-wb55/doc.txt

@@ -1,6 +1,6 @@
 /**
 @defgroup    boards_p-nucleo-wb55 STM32 p-nucleo-wb55
-@ingroup     boards_common_nucleo
+@ingroup     boards
 @brief       Support for the STM32 p-nucleo-wb55
 
 Hardware
@@ -45,11 +45,7 @@ Flashing the device
 -------------------
 
 The ST p-nucleo-wb55 board includes an on-board ST-LINK programmer and can be
-flashed using OpenOCD.
-
-@note The latest release of OpenOCD doesn't contain support for this board,
-so a recent development version must be built from source to be able to flash
-this board.
+flashed using OpenOCD (use version 0.11.0 at least).
 
 To flash this board, just use the following command:
 
@@ -102,8 +98,8 @@ Implementation Status
 |                  | RTC               | yes     |         |
 |                  | RNG               | yes     |         |
 |                  | Timer             | yes     | TIM2    |
-|                  | WDT               | no      |         |
-|                  | USB               | no      |         |
+|                  | WDT               | yes     |         |
+|                  | USB               | yes     |         |
 |                  | PWM               | no      |         |
 |                  | AES               | no      |         |
 

boards/samr34-xpro/doc.txt

@@ -0,0 +1,40 @@
+/**
+@defgroup    boards_samr34-xpro Microchip SAM R34 Xplained Pro
+@ingroup     boards
+@brief       Support for the Microchip SAM R34 Xplained Pro and WLR089 Xplained Pro
+
+## Overview
+
+The `SAMR34 Xplained Pro` is a compact evaluation board by Microchip featuring a
+SAMR34J18 SoC. The SoC includes a SAML21 ARM Cortex-M0+ micro-controller
+bundled with Semtech's SX1276, a 868/915 MHz LoRa compatible radio.
+For programming the MCU comes with 40Kb of RAM and 256Kb of flash memory.
+
+## Hardware
+
+![samr34-xpro image](https://www.microchip.com/content/dam/mchp/mrt-dam/devtools/3072-180605-wpd-dm320111-2.jpg)
+
+An evaluation board for the radio certified WLR089 module exists as the WLR089 Xplained Pro, it is compatible with the `samr34-xpro`.
+
+![wlr089-xpro](https://www.microchip.com/content/dam/mchp/mrt-dam/devtools/3411-264438-1598368489-c14679-200616-wsg-ev23m25a-wlr089-explained-pro-evaluation-board.jpg)
+
+
+### MCU
+| MCU        | SAMR34J18B            |
+|:---------- |:--------------------- |
+| Family     | ARM Cortex-M0+        |
+| Vendor     | Atmel                 |
+| RAM        | 32 kiB + 8 kiB battery RAM |
+| Flash      | 256 KiB               |
+| Frequency  | up to 48MHz           |
+| FPU        | no                    |
+| Timers     | 6 (3xTC (8,16,32 bit), 3xTCC (16 bit)) |
+| ADCs       | 1x 12-bit (8 channels)|
+| UARTs      | max 5 (shared with SPI and I2C) |
+| SPIs       | max 5 (see UART)      |
+| I2Cs       | max 5 (see UART)      |
+| Vcc        | 1.8V - 3.6V           |
+| Datasheet  | [Datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/SAMR34-R35-Low-Power-LoRa-Sub-GHz-SiP-Data-Sheet-DS70005356B.pdf) |
+| Board Manual | [SAM R34 XPro](https://www.microchip.com/en-us/development-tool/DM320111)<br>[WLR089 XPro](https://www.microchip.com/en-us/development-tool/EV23M25A)|
+
+ */

boards/samr34-xpro/include/board.h

@@ -7,9 +7,7 @@
  */
 
 /**
- * @defgroup    boards_samr34-xpro Microchip SAM R34 Xplained Pro
- * @ingroup     boards
- * @brief       Support for the Microchip SAM R34 Xplained Pro board.
+ * @ingroup     boards_samr34-xpro
  * @{
  *
  * @file
@@ -32,50 +30,50 @@ extern "C" {
  * @name Semtech SX1276 configuration
  * @{
  */
-#define SX127X_PARAM_SPI                    (SPI_DEV(0))
-#define SX127X_PARAM_SPI_NSS                GPIO_PIN(1, 31)       /* D10 */
-#define SX127X_PARAM_RESET                  GPIO_PIN(1, 15)       /* A0 */
-#define SX127X_PARAM_DIO0                   GPIO_PIN(1, 16)      /* D2 */
-#define SX127X_PARAM_DIO1                   GPIO_PIN(0, 11)       /* D3 */
-#define SX127X_PARAM_DIO2                   GPIO_PIN(0, 12)       /* D4 */
-#define SX127X_PARAM_DIO3                   GPIO_PIN(1, 17)       /* D5 */
-#define SX127X_PARAM_PASELECT               (SX127X_PA_RFO)
+#define SX127X_PARAM_SPI                    SPI_DEV(0)            /**< internal SPI */
+#define SX127X_PARAM_SPI_NSS                GPIO_PIN(1, 31)       /**< D10 */
+#define SX127X_PARAM_RESET                  GPIO_PIN(1, 15)       /**< A0  */
+#define SX127X_PARAM_DIO0                   GPIO_PIN(1, 16)       /**< D2  */
+#define SX127X_PARAM_DIO1                   GPIO_PIN(0, 11)       /**< D3  */
+#define SX127X_PARAM_DIO2                   GPIO_PIN(0, 12)       /**< D4  */
+#define SX127X_PARAM_DIO3                   GPIO_PIN(1, 17)       /**< D5  */
+#define SX127X_PARAM_PASELECT               SX127X_PA_RFO         /**< no boost */
 /** @}*/
 
 /**
  * @name Board specific configuration
  *  @{
  */
-#define TCXO_PWR_PIN                        GPIO_PIN(PA, 9)
-#define TX_OUTPUT_SEL_PIN                   GPIO_PIN(PA, 13)
+#define TCXO_PWR_PIN                        GPIO_PIN(PA, 9)     /**< 32 MHz oscillator for radio enable */
+#define TX_OUTPUT_SEL_PIN                   GPIO_PIN(PA, 13)    /**< BAND_SEL */
 /** @}*/
 
 /**
  * @name    LED pin definitions and handlers
  * @{
  */
-#define LED_PORT                    PORT->Group[0]
+#define LED_PORT                    PORT->Group[0]                      /**< GPIO port      */
 
-#define LED0_PIN                    GPIO_PIN(PA, 18)
-#define LED0_MASK                   (1 << 18)
-#define LED0_ON                     (LED_PORT.OUTCLR.reg = LED0_MASK)
-#define LED0_OFF                    (LED_PORT.OUTSET.reg = LED0_MASK)
-#define LED0_TOGGLE                 (LED_PORT.OUTTGL.reg = LED0_MASK)
+#define LED0_PIN                    GPIO_PIN(PA, 18)                    /**< GPIO pin       */
+#define LED0_MASK                   (1 << 18)                           /**< GPIO pin mask  */
+#define LED0_ON                     (LED_PORT.OUTCLR.reg = LED0_MASK)   /**< enable LED     */
+#define LED0_OFF                    (LED_PORT.OUTSET.reg = LED0_MASK)   /**< disable LED    */
+#define LED0_TOGGLE                 (LED_PORT.OUTTGL.reg = LED0_MASK)   /**< toggle LED     */
 
-#define LED1_PIN                    GPIO_PIN(PA, 19)
-#define LED1_MASK                   (1 << 19)
-#define LED1_ON                     (LED_PORT.OUTCLR.reg = LED1_MASK)
-#define LED1_OFF                    (LED_PORT.OUTSET.reg = LED1_MASK)
-#define LED1_TOGGLE                 (LED_PORT.OUTTGL.reg = LED1_MASK)
+#define LED1_PIN                    GPIO_PIN(PA, 19)                    /**< GPIO pin       */
+#define LED1_MASK                   (1 << 19)                           /**< GPIO pin mask  */
+#define LED1_ON                     (LED_PORT.OUTCLR.reg = LED1_MASK)   /**< enable LED     */
+#define LED1_OFF                    (LED_PORT.OUTSET.reg = LED1_MASK)   /**< disable LED    */
+#define LED1_TOGGLE                 (LED_PORT.OUTTGL.reg = LED1_MASK)   /**< toggle LED     */
 /** @} */
 
 /**
  * @name    BTN0 (SW0 Button) pin definitions
  * @{
  */
-#define BTN0_PORT                   PORT->Group[0]
-#define BTN0_PIN                    GPIO_PIN(PA, 28)
-#define BTN0_MODE                   GPIO_IN_PU
+#define BTN0_PORT                   PORT->Group[0]                      /**< GPIO port      */
+#define BTN0_PIN                    GPIO_PIN(PA, 28)                    /**< GPIO pin       */
+#define BTN0_MODE                   GPIO_IN_PU                          /**< Pull Up GPIO   */
 /** @} */
 
 /**

boards/stm32f429i-disc1/Kconfig

@@ -29,5 +29,7 @@ config BOARD_STM32F429I_DISC1
     select BOARD_HAS_LSE
 
     select HAVE_SAUL_GPIO
+    select HAVE_ILI9341
+    select HAVE_STMPE811_I2C
 
 source "$(RIOTBOARD)/common/stm32/Kconfig"

boards/stm32f723e-disco/Kconfig

@@ -28,7 +28,7 @@ config BOARD_STM32F723E_DISCO
     select BOARD_HAS_LSE
 
     select HAVE_SAUL_GPIO
-    select HAVE_FT6X06
+    select HAVE_FT5X06
     select MODULE_PERIPH_UART_HW_FC if TEST_KCONFIG && HAS_PERIPH_UART_HW_FC
     # Workaround due to stdout only working with stdin enabled
     select MODULE_STDIN if TEST_KCONFIG

boards/stm32f723e-disco/Makefile.dep

@@ -5,7 +5,7 @@ ifneq (,$(filter saul_default,$(USEMODULE)))
 endif
 
 ifneq (,$(filter touch_dev,$(USEMODULE)))
-  USEMODULE += ft6x06
+  USEMODULE += ft5x06
 endif
 
 # TODO: remove the stdin dependency

boards/stm32f723e-disco/include/board.h

@@ -68,6 +68,7 @@ extern "C" {
 #define FT5X06_PARAM_INT_PIN            GPIO_PIN(PORT_I, 9)     /**< Interrupt pin */
 #define FT5X06_PARAM_XMAX               (240)                   /**< Max width */
 #define FT5X06_PARAM_YMAX               (240)                   /**< Max height */
+#define FT5X06_PARAM_TYPE               FT5X06_TYPE_FT6X06      /**< Device type */
 /** @} */
 
 /**

boards/stm32f746g-disco/Kconfig

@@ -29,6 +29,6 @@ config BOARD_STM32F746G_DISCO
     select BOARD_HAS_LSE
 
     select HAVE_SAUL_GPIO
-    select HAVE_FT5336
+    select HAVE_FT5X06
 
 source "$(RIOTBOARD)/common/stm32/Kconfig"

boards/stm32f746g-disco/Makefile.dep

@@ -11,5 +11,5 @@ ifneq (,$(filter disp_dev,$(USEMODULE)))
 endif
 
 ifneq (,$(filter touch_dev,$(USEMODULE)))
-  USEMODULE += ft5336
+  USEMODULE += ft5x06
 endif

boards/stm32f746g-disco/include/board.h

@@ -73,6 +73,7 @@ extern "C" {
 #define FT5X06_PARAM_INT_PIN            GPIO_PIN(PORT_I, 13)    /**< Interrupt pin */
 #define FT5X06_PARAM_XMAX               (480)                   /**< Max width */
 #define FT5X06_PARAM_YMAX               (272)                   /**< Max height */
+#define FT5X06_PARAM_TYPE               FT5X06_TYPE_FT5336      /**< Device type */
 /** @} */
 
 /**

core/include/msg.h

@@ -375,6 +375,9 @@ unsigned msg_avail(void);
  *                  not be NULL.
  * @param[in] num   Number of ``msg_t`` structures in array.
  *                  **MUST BE POWER OF TWO!**
+ *
+ * If array resides on the stack, the containing stack frame must never be
+ * left, not even if it is the current thread's entry function.
  */
 void msg_init_queue(msg_t *array, int num);
 

core/include/sched.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Freie Universität Berlin
+ * Copyright (C) 2014-2017 Freie Universität Berlin
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -75,6 +75,7 @@
  * @brief       Scheduler API definition
  *
  * @author      Kaspar Schleiser <kaspar@schleiser.de>
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
  */
 
 #ifndef SCHED_H
@@ -252,6 +253,19 @@ extern clist_node_t sched_runqueues[SCHED_PRIO_LEVELS];
  */
 NORETURN void sched_task_exit(void);
 
+/**
+ * @brief   Change the priority of the given thread
+ *
+ * @note    This functions expects interrupts to be disabled when called!
+ *
+ * @pre     (thread != NULL)
+ * @pre     (priority < SCHED_PRIO_LEVELS)
+ *
+ * @param[in,out] thread    target thread
+ * @param[in]     priority  new priority to assign to @p thread
+ */
+void sched_change_priority(thread_t *thread, uint8_t priority);
+
 /**
  * @brief  Set CPU to idle mode (CPU dependent)
  *

core/include/thread.h

@@ -444,7 +444,7 @@ const char *thread_getname(kernel_pid_t pid);
  *
  * Only works if the thread was created with the flag THREAD_CREATE_STACKTEST.
  *
- * @param[in] stack the stack you want to measure. Try `thread_get_active()->stack_start`
+ * @param[in] stack the stack you want to measure. Try `thread_get_stackstart(thread_get_active())`
  *
  * @return          the amount of unused space of the thread's stack
  */

core/init.c

@@ -19,19 +19,16 @@
  * @}
  */
 
-#include <stdint.h>
-#include <stdbool.h>
 #include <errno.h>
-#include "kernel_init.h"
-#include "thread.h"
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "auto_init.h"
 #include "irq.h"
+#include "kernel_init.h"
 #include "log.h"
-
 #include "periph/pm.h"
-
-#ifdef MODULE_AUTO_INIT
-#include <auto_init.h>
-#endif
+#include "thread.h"
 
 #define ENABLE_DEBUG 0
 #include "debug.h"
@@ -47,9 +44,9 @@ static void *main_trampoline(void *arg)
 {
     (void)arg;
 
-#ifdef MODULE_AUTO_INIT
-    auto_init();
-#endif
+    if (IS_USED(MODULE_AUTO_INIT)) {
+        auto_init();
+    }
 
     if (!IS_ACTIVE(CONFIG_SKIP_BOOT_MSG)) {
         LOG_INFO(CONFIG_BOOT_MSG_STRING "\n");

core/sched.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Freie Universität Berlin
+ * Copyright (C) 2014-2017 Freie Universität Berlin
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -15,6 +15,7 @@
  *
  * @author      Kaspar Schleiser <kaspar@schleiser.de>
  * @author      René Kijewski <rene.kijewski@fu-berlin.de>
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
  *
  * @}
  */
@@ -86,21 +87,21 @@ static void (*sched_cb)(kernel_pid_t active_thread,
  * and readout away, switching between the two orders depending on the CLZ
  * instruction availability
  */
-static inline void _set_runqueue_bit(thread_t *process)
+static inline void _set_runqueue_bit(uint8_t priority)
 {
 #if defined(BITARITHM_HAS_CLZ)
-    runqueue_bitcache |= BIT31 >> process->priority;
+    runqueue_bitcache |= BIT31 >> priority;
 #else
-    runqueue_bitcache |= 1 << process->priority;
+    runqueue_bitcache |= 1 << priority;
 #endif
 }
 
-static inline void _clear_runqueue_bit(thread_t *process)
+static inline void _clear_runqueue_bit(uint8_t priority)
 {
 #if defined(BITARITHM_HAS_CLZ)
-    runqueue_bitcache &= ~(BIT31 >> process->priority);
+    runqueue_bitcache &= ~(BIT31 >> priority);
 #else
-    runqueue_bitcache &= ~(1 << process->priority);
+    runqueue_bitcache &= ~(1 << priority);
 #endif
 }
 
@@ -218,41 +219,54 @@ thread_t *__attribute__((used)) sched_run(void)
     return next_thread;
 }
 
+/* Note: Forcing the compiler to inline this function will reduce .text for applications
+ *       not linking in sched_change_priority(), which benefits the vast majority of apps.
+ */
+static inline __attribute__((always_inline)) void _runqueue_push(thread_t *thread, uint8_t priority)
+{
+    DEBUG("sched_set_status: adding thread %" PRIkernel_pid " to runqueue %" PRIu8 ".\n",
+          thread->pid, priority);
+    clist_rpush(&sched_runqueues[priority], &(thread->rq_entry));
+    _set_runqueue_bit(priority);
+
+    /* some thread entered a runqueue
+     * if it is the active runqueue
+     * inform the runqueue_change callback */
+#if (IS_USED(MODULE_SCHED_RUNQ_CALLBACK))
+    thread_t *active_thread = thread_get_active();
+    if (active_thread && active_thread->priority == priority) {
+        sched_runq_callback(priority);
+    }
+#endif
+}
+
+/* Note: Forcing the compiler to inline this function will reduce .text for applications
+ *       not linking in sched_change_priority(), which benefits the vast majority of apps.
+ */
+static inline __attribute__((always_inline)) void _runqueue_pop(thread_t *thread)
+{
+    DEBUG("sched_set_status: removing thread %" PRIkernel_pid " from runqueue %" PRIu8 ".\n",
+          thread->pid, thread->priority);
+    clist_lpop(&sched_runqueues[thread->priority]);
+
+    if (!sched_runqueues[thread->priority].next) {
+        _clear_runqueue_bit(thread->priority);
+#if (IS_USED(MODULE_SCHED_RUNQ_CALLBACK))
+        sched_runq_callback(thread->priority);
+#endif
+    }
+}
+
 void sched_set_status(thread_t *process, thread_status_t status)
 {
     if (status >= STATUS_ON_RUNQUEUE) {
         if (!(process->status >= STATUS_ON_RUNQUEUE)) {
-            DEBUG(
-                "sched_set_status: adding thread %" PRIkernel_pid " to runqueue %" PRIu8 ".\n",
-                process->pid, process->priority);
-            clist_rpush(&sched_runqueues[process->priority],
-                        &(process->rq_entry));
-            _set_runqueue_bit(process);
-
-            /* some thread entered a runqueue
-             * if it is the active runqueue
-             * inform the runqueue_change callback */
-#if (IS_USED(MODULE_SCHED_RUNQ_CALLBACK))
-            thread_t *active_thread = thread_get_active();
-            if (active_thread && active_thread->priority == process->priority) {
-                sched_runq_callback(process->priority);
-            }
-#endif
+            _runqueue_push(process, process->priority);
         }
     }
     else {
         if (process->status >= STATUS_ON_RUNQUEUE) {
-            DEBUG(
-                "sched_set_status: removing thread %" PRIkernel_pid " from runqueue %" PRIu8 ".\n",
-                process->pid, process->priority);
-            clist_lpop(&sched_runqueues[process->priority]);
-
-            if (!sched_runqueues[process->priority].next) {
-                _clear_runqueue_bit(process);
-#if (IS_USED(MODULE_SCHED_RUNQ_CALLBACK))
-                sched_runq_callback(process->priority);
-#endif
-            }
+            _runqueue_pop(process);
         }
     }
 
@@ -306,3 +320,40 @@ void sched_register_cb(void (*callback)(kernel_pid_t, kernel_pid_t))
     sched_cb = callback;
 }
 #endif
+
+void sched_change_priority(thread_t *thread, uint8_t priority)
+{
+    assert(thread && (priority < SCHED_PRIO_LEVELS));
+
+    if (thread->priority == priority) {
+        return;
+    }
+
+    unsigned irq_state = irq_disable();
+
+    if (thread_is_active(thread)) {
+        _runqueue_pop(thread);
+        _runqueue_push(thread, priority);
+    }
+    thread->priority = priority;
+
+    irq_restore(irq_state);
+
+    thread_t *active = thread_get_active();
+
+    if ((active == thread)
+        || ((active != NULL) && (active->priority > priority) && thread_is_active(thread))
+        ) {
+        /* If the change in priority would result in a different decision of
+         * the scheduler, we need to yield to make sure the change in priority
+         * takes effect immediately. This can be due to one of the following:
+         *
+         * 1) The priority of the thread currently running has been reduced
+         *    (higher numeric value), so that other threads now have priority
+         *    over the currently running.
+         * 2) The priority of a pending thread has been increased (lower numeric value) so that it
+         *    now has priority over the running thread.
+         */
+        thread_yield_higher();
+    }
+}

cpu/cc2538/periph/rtt.c

@@ -92,7 +92,7 @@ uint32_t rtt_get_counter(void)
 void rtt_set_counter(uint32_t counter)
 {
     rtt_alarm -= rtt_offset;
-    rtt_offset = _rtt_get_counter() + counter;
+    rtt_offset = _rtt_get_counter() - counter;
     rtt_alarm += rtt_offset;
 
     /* re-set the overflow callback */

cpu/cortexm_common/vectors_cortexm.c

@@ -137,6 +137,9 @@ void reset_handler_default(void)
     }
 
 #ifdef CPU_HAS_BACKUP_RAM
+#if BACKUP_RAM_HAS_INIT
+    backup_ram_init();
+#endif
     if (!cpu_woke_from_backup() ||
         CPU_BACKUP_RAM_NOT_RETAINED) {
 
@@ -158,10 +161,7 @@ void reset_handler_default(void)
 #endif /* CPU_HAS_BACKUP_RAM */
 
 #ifdef MODULE_MPU_NOEXEC_RAM
-    /* Mark the RAM non executable. This is a protection mechanism which
-     * makes exploitation of buffer overflows significantly harder.
-     *
-     * This marks the memory region from 0x20000000 to 0x3FFFFFFF as non
+    /* This marks the memory region from 0x20000000 to 0x3FFFFFFF as non
      * executable. This is the Cortex-M SRAM region used for on-chip RAM.
      */
     mpu_configure(

cpu/esp32/Kconfig

@@ -18,6 +18,8 @@ config CPU_FAM_ESP32
     select HAS_ESP_WIFI_ENTERPRISE
     select HAS_PERIPH_ADC_CTRL
 
+    select PACKAGE_ESP32_SDK if TEST_KCONFIG
+    select PACKAGE_ESP32_SDK_LIBS if TEST_KCONFIG
     select MODULE_PERIPH_RTT if HAS_PERIPH_RTT && MODULE_PM_LAYERED
     select MODULE_RTT_RTC if HAS_PERIPH_RTT && MODULE_PERIPH_RTC
     select MODULE_PS if MODULE_SHELL

cpu/esp32/Makefile.dep

@@ -2,6 +2,9 @@
 
 include $(RIOTCPU)/esp_common/Makefile.dep
 
+USEPKG += esp32_sdk
+USEPKG += esp32_sdk_libs
+
 USEMODULE += esp_idf_driver
 USEMODULE += esp_idf_esp32
 USEMODULE += esp_idf_soc

cpu/esp32/Makefile.include

@@ -1,12 +1,3 @@
-# check some environment variables first
-ifndef ESP32_SDK_DIR
-  $(info ESP32_SDK_DIR should be defined as /path/to/esp-idf directory)
-  $(info ESP32_SDK_DIR is set by default to /opt/esp/esp-idf)
-  export ESP32_SDK_DIR=/opt/esp/esp-idf
-endif
-
-ESP_SDK_DIR = $(ESP32_SDK_DIR)
-
 # ESP32 specific flashing options
 FLASH_CHIP  = esp32
 FLASH_MODE ?= dout
@@ -35,21 +26,23 @@ INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/esp32
 INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/heap
 INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/spi_flash
 INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/tcpip_adapter
-INCLUDES += -I$(ESP32_SDK_DIR)/components/
-INCLUDES += -I$(ESP32_SDK_DIR)/components/driver/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/esp32/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/heap/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/soc/esp32/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/soc/include
 INCLUDES += -I$(RIOTCPU)/$(CPU)
 
 ifneq (,$(filter esp_eth,$(USEMODULE)))
   INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/ethernet
-  INCLUDES += -I$(ESP32_SDK_DIR)/components/ethernet/include
 endif
 
 CFLAGS += -DSDK_NOT_USED -DCONFIG_FREERTOS_UNICORE=1 -DESP_PLATFORM
 CFLAGS += -DLOG_TAG_IN_BRACKETS
+CFLAGS += -D_CONST=const
+
+ifneq (,$(filter pthread,$(USEMODULE)))
+  # The toolchain provides POSIX type definitions for pthread which
+  # conflicts with that in RIOT. With the following CFLAGS/CXXFLAGS skip
+  # the inclusion of the types shipped by the toolchain.
+  CFLAGS += -D_SYS__PTHREADTYPES_H_
+  CXXFLAGS += -D_SYS__PTHREADTYPES_H_
+endif
 
 LINKFLAGS += -L$(RIOTCPU)/$(CPU)/ld/
 LINKFLAGS += -T$(RIOTCPU)/$(CPU)/ld/esp32.ld

cpu/esp32/doc.txt

@@ -408,31 +408,13 @@ export PATH=$PATH:$HOME/esp/xtensa-esp32-elf/bin
 
 [Back to table of contents](#esp32_toc)
 
-### Installation of ESP-IDF (Espressif IoT Development Framework) {#esp32_installation_of_esp_idf}
+### ESP-IDF (Espressif IoT Development Framework) {#esp32_installation_of_esp_idf}
 
-ESP-IDF, the official SDK from Espressif, can be downloaded and installed as GIT repository.
+RIOT-OS uses the ESP-IDF, the official SDK from Espressif, as part of the
+build. It is downloaded as a package at build-time and there is no need to
+install it separately.
 
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-cd $HOME/esp
-git clone https://github.com/espressif/esp-idf.git
-cd esp-idf
-git checkout f198339ec09e90666150672884535802304d23ec
-git submodule init
-git submodule update
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-@note Please take care to checkout correct branches which were used for the port. Newer versions
-      might also work but were not tested.
-
-Since we only use a few header files, ESP-IDF does not need to be compiled in any way. To use the
-installed ESP-IDF, just set the variable `ESP32_SDK_DIR` accordingly.
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-export ESP32_SDK_DIR=$HOME/esp/esp-idf
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-[Back to table of contents](#esp32_toc)
-
-### Installation of esptool.py (ESP flash programmer tool) {#esp32_installation_of_esptool}
+### Installation of `esptool.py` (ESP flash programmer tool) {#esp32_installation_of_esptool}
 
 The RIOT port does not work with the `esptool.py` ESP flasher program
 available on [GitHub](https://github.com/espressif/esptool) or

cpu/esp32/include/sdk_conf.h

@@ -28,6 +28,15 @@
 extern "C" {
 #endif
 
+/**
+ * @brief   SDK version number
+ *
+ * Determined with `git describe --tags` in `$ESP32_SDK_DIR`
+ */
+#if !defined(IDF_VER) || DOXYGEN
+#include "esp32_idf_version.h"
+#endif
+
 /**
  * @name    Clock configuration
  * @{
@@ -102,7 +111,9 @@ extern "C" {
 #define CONFIG_SYSTEM_EVENT_TASK_STACK_SIZE     2048
 #define CONFIG_NUMBER_OF_UNIVERSAL_MAC_ADDRESS  4
 
+#ifdef MODULE_NEWLIB_NANO
 #define CONFIG_NEWLIB_NANO_FORMAT               1
+#endif
 #define CONFIG_ESP32_DEEP_SLEEP_WAKEUP_DELAY    2000
 
 /**

cpu/esp32/include/sys/lock.h

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2022 Gunar Schorcht
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     cpu_esp32
+ * @{
+ *
+ * @file
+ * @brief       Wrapper for sys/lock.h
+ *
+ * @author      Gunar Schorcht <gunar@schorcht.net>
+ *
+ * This file is a wrapper for sys/lock.h to ensure source code compatibility
+ * even if retargetable locking is enabled in newlib.
+ */
+
+#ifndef SYS_LOCK_H
+#define SYS_LOCK_H
+
+#ifndef DOXYGEN
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include_next <sys/lock.h>
+
+#if defined(_RETARGETABLE_LOCKING)
+
+/*
+ * The structured lock type has to be large enough to hold a recursive mutex.
+ * Since `rmutex.h` cannot be included in this stage of header inclusion,
+ * `sizeof` cannot be used here and an array of sufficient size has to be
+ * defined. This is ensured by a `static_assert` in `cpu/esp_common/syscalls.c`.
+ */
+typedef struct __lock {
+    void *reserved[2];
+} __lock_t;
+
+#endif /* defined(_RETARGETABLE_LOCKING) */
+
+/*
+ * Declarations for source code compatibility. These functions were used
+ * in earlier newlib versions. In newer newlib versions, either the
+ * __lock_* or __retarget_* functions are used. They are still used in
+ * ESP-IDF.
+ */
+
+typedef _LOCK_T _lock_t;
+
+void _lock_init(_lock_t *lock);
+void _lock_init_recursive(_lock_t *lock);
+void _lock_close(_lock_t *lock);
+void _lock_close_recursive(_lock_t *lock);
+void _lock_acquire(_lock_t *lock);
+void _lock_acquire_recursive(_lock_t *lock);
+int  _lock_try_acquire(_lock_t *lock);
+int  _lock_try_acquire_recursive(_lock_t *lock);
+void _lock_release(_lock_t *lock);
+void _lock_release_recursive(_lock_t *lock);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* DOXYGEN */
+#endif /* SYS_LOCK_H */
+/** @} */

cpu/esp32/include/syscalls.h

@@ -28,7 +28,7 @@ extern "C" {
 #endif
 
 /** Time since boot in us (64bit version) */
-uint64_t system_get_time_64 (void);
+int64_t system_get_time_64 (void);
 
 /** initialize system watchdog timer and start it */
 void system_wdt_init (void);

cpu/esp32/periph/pwm.c

@@ -82,14 +82,6 @@ struct _pwm_hw_t {
     const gpio_t* gpios;        /* GPIOs used as channel outputs */
 };
 
-#ifdef PWM0_GPIOS
-static const gpio_t _pwm_channel_gpios_0[] = PWM0_GPIOS;
-#endif
-
-#ifdef PWM1_GPIOS
-static const gpio_t _pwm_channel_gpios_1[] = PWM1_GPIOS;
-#endif
-
 /* static configuration of PWM devices */
 static const struct _pwm_hw_t _pwm_hw[] =
 {

cpu/esp32/startup.c

@@ -24,6 +24,7 @@
 #include <string.h>
 #include <sys/reent.h>
 
+#include "macros/units.h"
 #include "board.h"
 #include "esp_attr.h"
 #include "exceptions.h"
@@ -69,7 +70,6 @@
 #define ENABLE_DEBUG 0
 #include "debug.h"
 
-#define MHZ 1000000UL
 #define STRINGIFY(s) STRINGIFY2(s)
 #define STRINGIFY2(s) #s
 
@@ -156,6 +156,9 @@ NORETURN void IRAM call_start_cpu0 (void)
         ets_printf("%02x", cpu_id[i]);
     }
     ets_printf("\n");
+
+    extern char* esp_get_idf_version(void);
+    LOG_STARTUP("ESP-IDF SDK Version %s\n\n", esp_get_idf_version());
 #endif
 
     if (reset_reason == DEEPSLEEP_RESET) {
@@ -167,7 +170,7 @@ NORETURN void IRAM call_start_cpu0 (void)
 
     LOG_STARTUP("Current clocks in Hz: CPU=%d APB=%d XTAL=%d SLOW=%d\n",
                 rtc_clk_cpu_freq_value(rtc_clk_cpu_freq_get()),
-                rtc_clk_apb_freq_get(), rtc_clk_xtal_freq_get()*MHZ,
+                rtc_clk_apb_freq_get(), MHZ(rtc_clk_xtal_freq_get()),
                 rtc_clk_slow_freq_get_hz());
 
     if (IS_ACTIVE(ENABLE_DEBUG)) {
@@ -256,7 +259,7 @@ static void IRAM system_clk_init (void)
                                                set to 2 MHz and handled later */
     }
 
-    uint32_t freq_before = rtc_clk_cpu_freq_value(rtc_clk_cpu_freq_get()) / MHZ;
+    uint32_t freq_before = rtc_clk_cpu_freq_value(rtc_clk_cpu_freq_get()) / MHZ(1);
 
     if (freq_before != CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ) {
         /* set configured CPU frequency */
@@ -324,7 +327,7 @@ static NORETURN void IRAM system_init (void)
     /* print some infos */
     LOG_STARTUP("Used clocks in Hz: CPU=%d APB=%d XTAL=%d FAST=%d SLOW=%d\n",
                 rtc_clk_cpu_freq_value(rtc_clk_cpu_freq_get()),
-                rtc_clk_apb_freq_get(), rtc_clk_xtal_freq_get()*MHZ,
+                rtc_clk_apb_freq_get(), MHZ(rtc_clk_xtal_freq_get()),
                 RTC_FAST_FREQ_8M_MHZ, rtc_clk_slow_freq_get_hz());
     LOG_STARTUP("XTAL calibration value: %d\n", esp_clk_slowclk_cal_get());
     LOG_STARTUP("Heap free: %u bytes\n", get_free_heap_size());
@@ -333,6 +336,10 @@ static NORETURN void IRAM system_init (void)
     /* initialize stdio */
     stdio_init();
 
+    /* disable buffering in stdio */
+    setvbuf(_stdout_r(_REENT), NULL, _IONBF, 0);
+    setvbuf(_stderr_r(_REENT), NULL, _IONBF, 0);
+
     /* trigger static peripheral initialization */
     periph_init();
 

cpu/esp32/syscalls.c

@@ -18,8 +18,12 @@
  * @}
  */
 
+#include <stdlib.h>
+#include <sys/lock.h>
 #include <sys/unistd.h>
+#include <sys/time.h>
 
+#include "div.h"
 #include "esp/common_macros.h"
 #include "irq_arch.h"
 #include "periph_cpu.h"
@@ -27,6 +31,7 @@
 #include "syscalls.h"
 #include "timex.h"
 
+#include "macros/units.h"
 #include "rom/ets_sys.h"
 #include "rom/libc_stubs.h"
 #include "soc/rtc.h"
@@ -43,8 +48,6 @@
 #define ENABLE_DEBUG 0
 #include "debug.h"
 
-#define MHZ 1000000UL
-
 #ifdef MODULE_ESP_IDF_HEAP
 
 /* if module esp_idf_heap is used, this function has to be defined for ESP32 */
@@ -91,6 +94,55 @@ void _exit_r(struct _reent *r, int status)
     _exit(status);
 }
 
+#if !IS_USED(MODULE_VFS)
+int _fcntl_r(struct _reent *r, int fd, int cmd, int arg)
+                              __attribute__((weak,alias("_no_sys_func")));
+#endif
+
+#ifndef CLOCK_REALTIME
+#define CLOCK_REALTIME (clockid_t)1
+#endif
+
+#ifndef CLOCK_MONOTONIC
+#define CLOCK_MONOTONIC (clockid_t)4
+#endif
+
+int clock_gettime_r(struct _reent *r, clockid_t clock_id, struct timespec *tp)
+{
+   if (tp == NULL) {
+        r->_errno = EINVAL;
+        return -1;
+    }
+
+    struct timeval tv;
+    uint64_t now = 0;
+
+    switch (clock_id) {
+    case CLOCK_REALTIME:
+        if (_gettimeofday_r(r, &tv, NULL))  {
+            return -1;
+        }
+        tp->tv_sec = tv.tv_sec;
+        tp->tv_nsec = tv.tv_usec * NS_PER_US;
+        break;
+    case CLOCK_MONOTONIC:
+        now = system_get_time_64();
+        tp->tv_sec = div_u64_by_1000000(now);
+        tp->tv_nsec = (now - (tp->tv_sec * US_PER_SEC)) * NS_PER_US;
+        break;
+    default:
+        r->_errno = EINVAL;
+        return -1;
+    }
+
+    return 0;
+}
+
+int clock_gettime(clockid_t clock_id, struct timespec *tp)
+{
+    return clock_gettime_r(_GLOBAL_REENT, clock_id, tp);
+}
+
 static int _no_sys_func(struct _reent *r)
 {
     DEBUG("%s: system function does not exist\n", __func__);
@@ -120,8 +172,8 @@ static struct syscall_stub_table s_stub_table =
     ._calloc_r = &_calloc_r,
     ._sbrk_r = &_sbrk_r,
 
-    ._system_r = (int (*)(struct _reent *, const char*))&_no_sys_func,
-    ._raise_r = (void (*)(struct _reent *))&_no_sys_func,
+    ._system_r = (void *)&_no_sys_func,
+    ._raise_r = (void *)&_no_sys_func,
     ._abort = &_abort,
     ._exit_r = &_exit_r,
     ._getpid_r = &_getpid_r,
@@ -138,8 +190,8 @@ static struct syscall_stub_table s_stub_table =
     ._write_r = (int (*)(struct _reent *r, int, const void *, int))&_write_r,
     ._read_r = (int (*)(struct _reent *r, int, void *, int))&_read_r,
     ._unlink_r = &_unlink_r,
-    ._link_r = (int (*)(struct _reent *r, const char*, const char*))&_no_sys_func,
-    ._rename_r = (int (*)(struct _reent *r, const char*, const char*))&_no_sys_func,
+    ._link_r = (void *)&_no_sys_func,
+    ._rename_r = (void *)&_no_sys_func,
 
     ._lock_init = &_lock_init,
     ._lock_init_recursive = &_lock_init_recursive,
@@ -164,7 +216,7 @@ static struct syscall_stub_table s_stub_table =
 void IRAM syscalls_init_arch(void)
 {
     /* enable the system timer in us (TMG0 is enabled by default) */
-    TIMER_SYSTEM.config.divider = rtc_clk_apb_freq_get()/MHZ;
+    TIMER_SYSTEM.config.divider = rtc_clk_apb_freq_get() / MHZ(1);
     TIMER_SYSTEM.config.autoreload = 0;
     TIMER_SYSTEM.config.enable = 1;
 
@@ -185,7 +237,7 @@ uint32_t system_get_time_ms(void)
     return system_get_time_64() / US_PER_MS;
 }
 
-uint64_t system_get_time_64(void)
+int64_t system_get_time_64(void)
 {
     uint64_t  ret;
     /* latch 64 bit timer value before read */

cpu/esp32/vendor/esp-idf/esp32/sleep_modes.c

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include <stddef.h>
+#include <stdlib.h>
 #include <sys/lock.h>
 #include <sys/param.h>
 #include "esp_attr.h"

cpu/esp32/vendor/esp-idf/esp32/wifi_os_adapter.c

@@ -411,8 +411,8 @@ wifi_osi_funcs_t g_wifi_osi_funcs = {
     ._version = ESP_WIFI_OS_ADAPTER_VERSION,
     ._set_isr = set_isr_wrapper,
 #ifdef RIOT_VERSION
-    ._ints_on = (void (*)(unsigned int))xt_ints_on,
-    ._ints_off = (void (*)(unsigned int))xt_ints_off,
+    ._ints_on = (void *)xt_ints_on,
+    ._ints_off = (void *)xt_ints_off,
 #else
     ._ints_on = xt_ints_on,
     ._ints_off = xt_ints_off,

cpu/esp32/vendor/esp-idf/esp_funcs.c

@@ -482,6 +482,11 @@ void IRAM_ATTR esp_restart_noos(void)
     }
 }
 
+const char* esp_get_idf_version(void)
+{
+    return IDF_VER;
+}
+
 /*
  * source: /path/to/esp-idf/components/wpa_supplicant/port/os_xtensa.c
  */

cpu/esp32/vendor/esp-idf/heap/heap_caps.c

@@ -309,7 +309,7 @@ IRAM_ATTR void *heap_caps_calloc( size_t n, size_t size, uint32_t caps)
     void *r;
     r = heap_caps_malloc(n*size, caps);
     if (r != NULL) {
-        bzero(r, n*size);
+        memset(r, 0, n*size);
     }
     return r;
 }
@@ -347,7 +347,7 @@ size_t heap_caps_get_largest_free_block( uint32_t caps )
 
 void heap_caps_get_info( multi_heap_info_t *info, uint32_t caps )
 {
-    bzero(info, sizeof(multi_heap_info_t));
+    memset(info, 0, sizeof(multi_heap_info_t));
 
     heap_t *heap;
     SLIST_FOREACH(heap, &registered_heaps, next) {

cpu/esp32/vendor/esp-idf/heap/heap_trace.c

@@ -290,7 +290,7 @@ inline static uint32_t get_ccount(void)
 static IRAM_ATTR __attribute__((noinline)) void get_call_stack(void **callers)
 {
     const int offset = 2; // Caller is 2 stack frames deeper than we care about
-    bzero(callers, sizeof(void *) * STACK_DEPTH);
+    memset(callers, 0, sizeof(void *) * STACK_DEPTH);
     TEST_STACK(0);
     TEST_STACK(1);
     TEST_STACK(2);

cpu/esp32/vendor/esp-idf/nvs_flash/Kconfig

@@ -9,6 +9,7 @@ config MODULE_ESP_IDF_NVS_FLASH
     bool
     depends on TEST_KCONFIG
     depends on MODULE_ESP_IDF
+    select MODULE_CPP
     select MODULE_MTD
     help
         Non-volatile storage library.

cpu/esp32/vendor/esp-idf/nvs_flash/Makefile

@@ -3,7 +3,6 @@ MODULE=esp_idf_nvs_flash
 include $(RIOTBASE)/Makefile.base
 
 CFLAGS   += -DESP_PLATFORM
-CXXFLAGS += -std=c++11
 INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
 INCLUDES += -I$(ESP32_SDK_DIR)/components/nvs_flash/include
 INCLUDES += -I$(ESP32_SDK_DIR)/components/spi_flash/include

cpu/esp32/vendor/esp-idf/wpa_supplicant/port/Makefile

@@ -4,13 +4,13 @@ include $(RIOTBASE)/Makefile.base
 
 # we have to do it in that way to avoid that $(RIOTBASE)/sys/include/crypto
 # is found first
-INCLUDES  = -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
 CFLAGS += -D__ets__
 
 include $(RIOTCPU)/$(CPU)/Makefile.include
 
-INCLUDES += -I$(RIOTBASE)/core/include
-INCLUDES += -I$(RIOTBASE)/drivers/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/include
+# This converts INCLUDES to a simply evaluated variable instead of a recursively
+# one but only for this module.
+INCLUDES := $(PRE_INCLUDES) $(INCLUDES)

cpu/esp32/vendor/esp-idf/wpa_supplicant/port/include/endian.h

@@ -0,0 +1,240 @@
+/*-
+ * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef ENDIAN_H
+#define ENDIAN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "byteswap.h"
+
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN 4321
+#endif
+#ifndef LITTLE_ENDIAN
+#define LITTLE_ENDIAN 1234
+#endif
+
+#ifndef BYTE_ORDER
+#ifdef __IEEE_LITTLE_ENDIAN
+#define BYTE_ORDER LITTLE_ENDIAN
+#else
+#define BYTE_ORDER BIG_ENDIAN
+#endif
+#endif
+
+#define _UINT8_T_DECLARED
+#ifndef _UINT8_T_DECLARED
+typedef	__uint8_t	uint8_t;
+#define	_UINT8_T_DECLARED
+#endif
+
+#define _UINT16_T_DECLARED
+#ifndef _UINT16_T_DECLARED
+typedef	__uint16_t	uint16_t;
+#define	_UINT16_T_DECLARED
+#endif
+ 
+#define _UINT32_T_DECLARED
+#ifndef _UINT32_T_DECLARED
+typedef	__uint32_t	uint32_t;
+#define	_UINT32_T_DECLARED
+#endif
+ 
+#define _UINT64_T_DECLARED
+#ifndef _UINT64_T_DECLARED
+typedef	__uint64_t	uint64_t;
+#define	_UINT64_T_DECLARED
+#endif
+ 
+/*
+ * General byte order swapping functions.
+ */
+#define	bswap16(x)	__bswap16(x)
+#define	bswap32(x)	__bswap32(x)
+#define	bswap64(x)	__bswap64(x)
+
+/*
+ * Host to big endian, host to little endian, big endian to host, and little
+ * endian to host byte order functions as detailed in byteorder(9).
+ */
+#if 1 //BYTE_ORDER == _LITTLE_ENDIAN
+#if __GNUC__ <= 5
+#define __bswap16     __bswap_16
+#define __bswap32     __bswap_32
+#endif
+#define	htobe16(x)	bswap16((x))
+#define	htobe32(x)	bswap32((x))
+#define	htobe64(x)	bswap64((x))
+#define	htole16(x)	((uint16_t)(x))
+#define	htole32(x)	((uint32_t)(x))
+#define	htole64(x)	((uint64_t)(x))
+
+#define	be16toh(x)	bswap16((x))
+#define	be32toh(x)	bswap32((x))
+#define	be64toh(x)	bswap64((x))
+#define	le16toh(x)	((uint16_t)(x))
+#define	le32toh(x)	((uint32_t)(x))
+#define	le64toh(x)	((uint64_t)(x))
+
+#ifndef htons
+#define htons htobe16
+#endif //htons
+
+#else /* _BYTE_ORDER != _LITTLE_ENDIAN */
+#define	htobe16(x)	((uint16_t)(x))
+#define	htobe32(x)	((uint32_t)(x))
+#define	htobe64(x)	((uint64_t)(x))
+#define	htole16(x)	bswap16((x))
+#define	htole32(x)	bswap32((x))
+#define	htole64(x)	bswap64((x))
+
+#define	be16toh(x)	((uint16_t)(x))
+#define	be32toh(x)	((uint32_t)(x))
+#define	be64toh(x)	((uint64_t)(x))
+#define	le16toh(x)	bswap16((x))
+#define	le32toh(x)	bswap32((x))
+#define	le64toh(x)	bswap64((x))
+#endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
+
+/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
+#define INLINE                  __inline__
+
+static INLINE uint16_t
+be16dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return ((p[0] << 8) | p[1]);
+}
+
+static INLINE uint32_t
+be32dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
+}
+
+static INLINE uint64_t
+be64dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
+}
+
+static INLINE uint16_t
+le16dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return ((p[1] << 8) | p[0]);
+}
+
+static INLINE uint32_t
+le32dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((unsigned)p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
+}
+
+static INLINE uint64_t
+le64dec(const void *pp)
+{
+	uint8_t const *p = (uint8_t const *)pp;
+
+	return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
+}
+
+static INLINE void
+be16enc(void *pp, uint16_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = (u >> 8) & 0xff;
+	p[1] = u & 0xff;
+}
+
+static INLINE void
+be32enc(void *pp, uint32_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = (u >> 24) & 0xff;
+	p[1] = (u >> 16) & 0xff;
+	p[2] = (u >> 8) & 0xff;
+	p[3] = u & 0xff;
+}
+
+static INLINE void
+be64enc(void *pp, uint64_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	be32enc(p, (uint32_t)(u >> 32));
+	be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
+}
+
+static INLINE void
+le16enc(void *pp, uint16_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = u & 0xff;
+	p[1] = (u >> 8) & 0xff;
+}
+
+static INLINE void
+le32enc(void *pp, uint32_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = u & 0xff;
+	p[1] = (u >> 8) & 0xff;
+	p[2] = (u >> 16) & 0xff;
+	p[3] = (u >> 24) & 0xff;
+}
+
+static INLINE void
+le64enc(void *pp, uint64_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	le32enc(p, (uint32_t)(u & 0xffffffffU));
+	le32enc(p + 4, (uint32_t)(u >> 32));
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* ENDIAN_H */

cpu/esp32/vendor/esp-idf/wpa_supplicant/port/include/os.h

@@ -26,6 +26,7 @@ extern "C" {
 
 #include "esp_types.h"
 #include <string.h>
+#include <strings.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include "esp_err.h"
@@ -213,7 +214,7 @@ char * os_readfile(const char *name, size_t *len);
 #endif
 
 #ifndef os_bzero
-#define os_bzero(s, n) bzero(s, n)
+#define os_bzero(s, n) memset(s, 0, n)
 #endif
 
 
@@ -221,6 +222,7 @@ char * os_readfile(const char *name, size_t *len);
 #ifdef _MSC_VER
 #define os_strdup(s) _strdup(s)
 #else
+char *strdup(const char *s);
 #define os_strdup(s) strdup(s)
 #endif
 #endif

cpu/esp32/vendor/esp-idf/wpa_supplicant/src/crypto/Makefile

@@ -4,15 +4,16 @@ include $(RIOTBASE)/Makefile.base
 
 # we have to do it in that way to avoid that $(RIOTBASE)/sys/include/crypto
 # is found first
-INCLUDES  = -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include/wpa
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include/wpa
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
 CFLAGS += -D__ets__ -DESPRESSIF_USE -DESP32_IDF_CODE=1
 
 include $(RIOTCPU)/$(CPU)/Makefile.include
 
-INCLUDES += -I$(RIOTBASE)/core/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
-INCLUDES += -I$(RIOTCPU)/$(CPU)/include
+# This converts INCLUDES to a simply evaluated variable instead of a recursively
+# one but only for this module.
+INCLUDES := $(PRE_INCLUDES) $(INCLUDES)

cpu/esp32/vendor/esp-idf/wpa_supplicant/src/wpa2/eap_peer/Makefile

@@ -4,16 +4,18 @@ include $(RIOTBASE)/Makefile.base
 
 # we have to do it in that way to avoid that $(RIOTBASE)/sys/include/crypto
 # is found first
-INCLUDES  = -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include/wpa
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include/wpa
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
 CFLAGS += -D__ets__ -DESPRESSIF_USE -DESP32_IDF_CODE=1
 CFLAGS += -DEAP_PEER_METHOD -DEAP_TLS -DEAP_PEAP -DEAP_TTLS -DEAP_MSCHAPv2 -DUSE_WPA2_TASK
+CFLAGS += -Wno-stringop-truncation
 
 include $(RIOTCPU)/$(CPU)/Makefile.include
 
-INCLUDES += -I$(RIOTBASE)/core/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
-INCLUDES += -I$(RIOTCPU)/$(CPU)/include
+# This converts INCLUDES to a simply evaluated variable instead of a recursively
+# one but only for this module.
+INCLUDES := $(PRE_INCLUDES) $(INCLUDES)

cpu/esp32/vendor/esp-idf/wpa_supplicant/src/wpa2/tls/Makefile

@@ -4,15 +4,17 @@ include $(RIOTBASE)/Makefile.base
 
 # we have to do it in that way to avoid that $(RIOTBASE)/sys/include/crypto
 # is found first
-INCLUDES  = -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include/wpa
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include/wpa
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
 CFLAGS += -D__ets__ -DESPRESSIF_USE -DESP32_IDF_CODE=1
+CFLAGS += -Wno-implicit-fallthrough
 
 include $(RIOTCPU)/$(CPU)/Makefile.include
 
-INCLUDES += -I$(RIOTBASE)/core/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
-INCLUDES += -I$(RIOTCPU)/$(CPU)/include
+# This converts INCLUDES to a simply evaluated variable instead of a recursively
+# one but only for this module.
+INCLUDES := $(PRE_INCLUDES) $(INCLUDES)

cpu/esp32/vendor/esp-idf/wpa_supplicant/src/wpa2/utils/Makefile

@@ -4,15 +4,16 @@ include $(RIOTBASE)/Makefile.base
 
 # we have to do it in that way to avoid that $(RIOTBASE)/sys/include/crypto
 # is found first
-INCLUDES  = -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include/wpa
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
-INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/include/wpa
+PRE_INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/wpa_supplicant/port/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/include
+PRE_INCLUDES += -I$(ESP32_SDK_DIR)/components/wpa_supplicant/port/include
 CFLAGS += -D__ets__ -DESPRESSIF_USE -DESP32_IDF_CODE=1
 
 include $(RIOTCPU)/$(CPU)/Makefile.include
 
-INCLUDES += -I$(RIOTBASE)/core/include
-INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/esp-idf/include/log
-INCLUDES += -I$(RIOTCPU)/$(CPU)/include
+# This converts INCLUDES to a simply evaluated variable instead of a recursively
+# one but only for this module.
+INCLUDES := $(PRE_INCLUDES) $(INCLUDES)

cpu/esp8266/vendor/esp-idf/nvs_flash/src/Kconfig

@@ -9,5 +9,6 @@ config MODULE_ESP_IDF_NVS_FLASH
     bool
     depends on TEST_KCONFIG
     depends on MODULE_ESP_IDF
+    select MODULE_CPP
     help
         Non-volatile storage library.

cpu/esp8266/vendor/esp-idf/nvs_flash/src/Makefile

@@ -3,6 +3,5 @@ MODULE=esp_idf_nvs_flash
 include $(RIOTBASE)/Makefile.base
 
 CFLAGS += -DESP_PLATFORM -DNVS_CRC_HEADER_FILE=\"crc.h\"
-CXXFLAGS += -std=c++11
 INCLUDES += -I$(ESP8266_RTOS_SDK_DIR)/components/nvs_flash/include
 INCLUDES += -I$(ESP8266_RTOS_SDK_DIR)/components/util/include

cpu/esp_common/Makefile.dep

@@ -25,7 +25,10 @@ USEMODULE += xtensa
 # Features used by ESP*
 
 FEATURES_REQUIRED += newlib
-FEATURES_REQUIRED += cpp # Vendor code uses C++
+
+ifneq (,$(filter esp_idf_nvs_flash,$(USEMODULE)))
+  FEATURES_REQUIRED += cpp
+endif
 
 ifneq (,$(filter esp_wifi_ap,$(USEMODULE)))
   FEATURES_REQUIRED += esp_wifi_ap

cpu/esp_common/Makefile.include

@@ -81,11 +81,11 @@ CFLAGS += $(if $(findstring dout,$(FLASH_MODE)),-DFLASH_MODE_DOUT=1)
 ARCHIVES += -lhal -lg -lc
 
 LINKFLAGS += $(CFLAGS_OPT) $(CFLAGS_DBG)
-ifneq ($(CPU),esp8266)
+#ifneq ($(CPU),esp8266)
 # esp8266 flags are added by the SDK pkg in pkg/esp8266_sdk
-LINKFLAGS += -L$(ESP_SDK_DIR)/components/$(CPU)
-LINKFLAGS += -L$(ESP_SDK_DIR)/components/$(CPU)/lib
-endif
+#LINKFLAGS += -L$(ESP_SDK_DIR)/components/$(CPU)
+#LINKFLAGS += -L$(ESP_SDK_DIR)/components/$(CPU)/lib
+#endif
 LINKFLAGS += -nostdlib -Wl,-gc-sections -Wl,-static
 
 # use the wrapper functions for calloc to add correct overflow detection missing

cpu/esp_common/esp_common.config

@@ -6,6 +6,3 @@ CONFIG_MODULE_PRNG_MUSL_LCG=y
 CONFIG_MODULE_PERIPH_HWRNG=y
 CONFIG_MODULE_PERIPH_UART=y
 CONFIG_MODULE_NEWLIB=y
-
-# Vendor code uses C++
-CONFIG_MODULE_CPP=y

cpu/esp_common/freertos/task.c

@@ -78,7 +78,7 @@ BaseType_t xTaskCreatePinnedToCore (TaskFunction_t pvTaskCode,
                                      uxPriority,
                                      THREAD_CREATE_WOUT_YIELD |
                                      THREAD_CREATE_STACKTEST,
-                                     (thread_task_func_t)pvTaskCode,
+                                     (void *)pvTaskCode,
                                      pvParameters, pcName);
     DEBUG("pid=%d\n", pid);
 

cpu/esp_common/periph/flash.c

@@ -88,6 +88,7 @@ static uint32_t _flash_size; /* resulting size of the flash drive in SPI flash *
 
 static esp_rom_spiflash_chip_t* _flashchip = NULL;
 
+#ifdef MCU_ESP8266
 /* flash_id determines the flash size in kByte */
 static const uint32_t flash_sizes[] = {
     256,        /* last byte of id is 0x12 */
@@ -98,6 +99,7 @@ static const uint32_t flash_sizes[] = {
     8 * 1024,   /* last byte of id is 0x17 */
    16 * 1024    /* last byte of id is 0x18 */
 };
+#endif
 
 void spi_flash_drive_init (void)
 {
@@ -460,7 +462,7 @@ const esp_partition_t* esp_partition_find_first(esp_partition_type_t type,
                 part->address = info->pos.offset;
                 part->size = info->pos.size;
                 part->encrypted = info->flags & PART_FLAG_ENCRYPTED;
-                strncpy(part->label, (const char*)info->label, sizeof(info->label));
+                strncpy(part->label, (const char*)info->label, sizeof(part->label));
                 part->label[sizeof(part->label) - 1] = 0x0;
 
                 return part;

cpu/esp_common/syscalls.c

@@ -252,6 +252,77 @@ void IRAM_ATTR _lock_release_recursive(_lock_t *lock)
     rmutex_unlock((rmutex_t*)*lock);
 }
 
+#if defined(_RETARGETABLE_LOCKING)
+
+/* check whether `struct __lock` is large enough to hold a recursive mutex */
+static_assert(sizeof(struct __lock) >= sizeof(rmutex_t),
+              "struct __lock is too small to hold a recursive mutex of type rmutex_t");
+
+/* definition of locks required by the newlib if retargetable locking is used */
+struct __lock __lock___sinit_recursive_mutex;
+struct __lock __lock___sfp_recursive_mutex;
+struct __lock __lock___atexit_recursive_mutex;
+struct __lock __lock___at_quick_exit_mutex;
+struct __lock __lock___malloc_recursive_mutex;
+struct __lock __lock___env_recursive_mutex;
+struct __lock __lock___tz_mutex;
+struct __lock __lock___dd_hash_mutex;
+struct __lock __lock___arc4random_mutex;
+
+/* map newlib's `__retarget_*` functions to the existing `_lock_*` functions */
+
+void __retarget_lock_init(_LOCK_T *lock)
+{
+    _lock_init(lock);
+}
+
+extern void __retarget_lock_init_recursive(_LOCK_T *lock)
+{
+    _lock_init_recursive(lock);
+}
+
+void __retarget_lock_close(_LOCK_T lock)
+{
+    _lock_close(&lock);
+}
+
+void __retarget_lock_close_recursive(_LOCK_T lock)
+{
+    _lock_close_recursive(&lock);
+}
+
+void __retarget_lock_acquire(_LOCK_T lock)
+{
+    _lock_acquire(&lock);
+}
+
+void __retarget_lock_acquire_recursive(_LOCK_T lock)
+{
+    _lock_acquire_recursive(&lock);
+}
+
+int __retarget_lock_try_acquire(_LOCK_T lock)
+{
+    return _lock_try_acquire(&lock);
+}
+
+int __retarget_lock_try_acquire_recursive(_LOCK_T lock)
+{
+    return _lock_try_acquire_recursive(&lock);
+}
+
+void __retarget_lock_release(_LOCK_T lock)
+{
+    _lock_release(&lock);
+}
+
+void __retarget_lock_release_recursive(_LOCK_T lock)
+{
+    _lock_release(&lock);
+}
+
+#endif /* _RETARGETABLE_LOCKING */
+
 /**
  * @name Memory allocation functions
  */
@@ -284,7 +355,7 @@ void* IRAM_ATTR __wrap__calloc_r(struct _reent *r, size_t count, size_t size)
     }
     void *result = heap_caps_malloc_default(size_total);
     if (result) {
-        bzero(result, size_total);
+        memset(result, 0, size_total);
     }
     return result;
 }

cpu/lpc23xx/Makefile.dep

@@ -3,7 +3,8 @@ USEMODULE += bitfield
 USEMODULE += periph
 
 ifneq (,$(filter mci,$(USEMODULE)))
-  USEMODULE += xtimer
+  USEMODULE += ztimer
+  USEMODULE += ztimer_usec
 endif
 
 include $(RIOTCPU)/arm7_common/Makefile.dep

cpu/lpc23xx/mci/Kconfig

@@ -9,4 +9,4 @@ config MODULE_MCI
     bool "LPC23XX Multimedia Card Interface (MCI) driver"
     depends on CPU_FAM_LPC23XX
     depends on TEST_KCONFIG
-    select MODULE_XTIMER
+    select ZTIMER_USEC

cpu/lpc23xx/mci/lpc23xx-mci.c

@@ -16,7 +16,8 @@
 #include <string.h>
 #include "cpu.h"
 #include "VIC.h"
-#include "xtimer.h"
+#include "ztimer.h"
+#include "timex.h"
 #include "diskio.h"
 
 #define ENABLE_DEBUG 0
@@ -319,7 +320,7 @@ static void power_on(void)
     MCI_POWER = 0x01;                   /* Power on */
 
     //for (Timer[0] = 10; Timer[0]; ) ; /* 10ms */
-    xtimer_usleep(1000);
+    ztimer_sleep(ZTIMER_USEC, 1 * US_PER_MS);
 
     MCI_POWER = 0x03;                   /* Enable signals */
 }
@@ -400,12 +401,12 @@ static int send_cmd(unsigned int idx, unsigned long arg, unsigned int rt, unsign
     MCI_COMMAND = mc;               /* Initiate command transaction */
 
     //Timer[1] = 100;
-    uint32_t timerstart = xtimer_now_usec();
+    uint32_t timerstart = ztimer_now(ZTIMER_USEC);
 
     while (1) {                     /* Wait for end of the cmd/resp transaction */
 
         //if (!Timer[1]) return 0;
-        if ((xtimer_now_usec() - timerstart) > 10000) {
+        if ((ztimer_now(ZTIMER_USEC) - timerstart) > 10 * US_PER_MS) {
             return 0;
         }
 
@@ -459,10 +460,10 @@ static int wait_ready(unsigned short tmr)
 {
     unsigned long rc;
 
-    uint32_t stoppoll = xtimer_now_usec() + tmr * US_PER_MS;
+    uint32_t stoppoll = ztimer_now(ZTIMER_USEC) + tmr * US_PER_MS;
     bool bBreak = false;
 
-    while (xtimer_now_usec() < stoppoll/*Timer[0]*/) {
+    while (ztimer_now(ZTIMER_USEC) < stoppoll/*Timer[0]*/) {
         if (send_cmd(CMD13, (unsigned long) CardRCA << 16, 1, &rc) && ((rc & 0x01E00) == 0x00800)) {
             bBreak = true;
             break;
@@ -509,12 +510,12 @@ diskio_sta_t mci_initialize(void)
 
     power_off();
 
-    xtimer_usleep(1000);
+    ztimer_sleep(ZTIMER_USEC, 1 * US_PER_MS);
 
     power_on();                             /* Force socket power on */
     MCI_CLOCK = 0x100 | (PCLK / MCLK_ID / 2 - 1);   /* Set MCICLK = MCLK_ID */
     //for (Timer[0] = 2; Timer[0]; );
-    xtimer_usleep(250);
+    ztimer_sleep(ZTIMER_USEC, 250);
 
     send_cmd(CMD0, 0, 0, resp);             /* Enter idle state */
     CardRCA = 0;
@@ -522,7 +523,7 @@ diskio_sta_t mci_initialize(void)
     /*---- Card is 'idle' state ----*/
 
     /* Initialization timeout of 1000 msec */
-    uint32_t start = xtimer_now_usec();
+    uint32_t start = ztimer_now(ZTIMER_USEC);
 
     /* SDC Ver2 */
     if (send_cmd(CMD8, 0x1AA, 1, resp) && (resp[0] & 0xFFF) == 0x1AA) {
@@ -532,7 +533,7 @@ diskio_sta_t mci_initialize(void)
         do {
             /* Wait while card is busy state (use ACMD41 with HCS bit) */
             /* This loop will take a time. Insert wai_tsk(1) here for multitask envilonment. */
-            if (xtimer_now_usec() > (start + 1000000/* !Timer[0] */)) {
+            if (ztimer_now(ZTIMER_USEC) > (start + 1 * US_PER_SEC /* !Timer[0] */)) {
                 DEBUG("%s, %d: Timeout #1\n", RIOT_FILE_RELATIVE, __LINE__);
                 goto di_fail;
             }
@@ -558,9 +559,9 @@ diskio_sta_t mci_initialize(void)
             DEBUG("%s, %d: %lX\n", RIOT_FILE_RELATIVE, __LINE__, resp[0]);
 
             /* This loop will take a time. Insert wai_tsk(1) here for multitask envilonment. */
-            if (xtimer_now_usec() > (start + 1000000/* !Timer[0] */)) {
-                DEBUG("now: %" PRIu32 ", started at: %" PRIu32 "\n",
-                      xtimer_now_usec(), start);
+            if (ztimer_now(ZTIMER_USEC) > (start + 1 * US_PER_SEC/* !Timer[0] */)) {
+                DEBUG("now: %" PRIu32 "us, started at: %" PRIu32 "\n",
+                      (uint32_t) ztimer_now(ZTIMER_USEC), start);
                 DEBUG("%s, %d: Timeout #2\n", RIOT_FILE_RELATIVE, __LINE__);
                 goto di_fail;
             }

cpu/native/native_cpu.c

@@ -102,11 +102,10 @@ int thread_isr_stack_usage(void)
     return -1;
 }
 
-static inline void *align_stack(void *stack_start, int *stacksize)
+static inline void *align_stack(uintptr_t start, int *stacksize)
 {
     const size_t alignment = sizeof(uintptr_t);
     const uintptr_t align_mask = alignment - 1;
-    uintptr_t start = (uintptr_t)stack_start;
     size_t unalignment = (start & align_mask)
                          ? (alignment - (start & align_mask)) : 0;
     start += unalignment;
@@ -117,10 +116,9 @@ static inline void *align_stack(void *stack_start, int *stacksize)
 
 char *thread_stack_init(thread_task_func_t task_func, void *arg, void *stack_start, int stacksize)
 {
-    char *stk;
     ucontext_t *p;
 
-    stack_start = align_stack(stack_start, &stacksize);
+    stack_start = align_stack((uintptr_t)stack_start, &stacksize);
 
     VALGRIND_STACK_REGISTER(stack_start, (char *)stack_start + stacksize);
     VALGRIND_DEBUG("VALGRIND_STACK_REGISTER(%p, %p)\n",
@@ -128,18 +126,16 @@ char *thread_stack_init(thread_task_func_t task_func, void *arg, void *stack_sta
 
     DEBUG("thread_stack_init\n");
 
-    stk = stack_start;
-
     /* Use intermediate cast to uintptr_t to silence -Wcast-align. The stack
      * is aligned to word size above. */
-    p = (ucontext_t *)(uintptr_t)(stk + (stacksize - sizeof(ucontext_t)));
+    p = (ucontext_t *)(uintptr_t)((uint8_t *)stack_start + (stacksize - sizeof(ucontext_t)));
     stacksize -= sizeof(ucontext_t);
 
     if (getcontext(p) == -1) {
         err(EXIT_FAILURE, "thread_stack_init: getcontext");
     }
 
-    p->uc_stack.ss_sp = stk;
+    p->uc_stack.ss_sp = stack_start;
     p->uc_stack.ss_size = stacksize;
     p->uc_stack.ss_flags = 0;
     p->uc_link = &end_context;

cpu/nrf52/radio/nrf802154/nrf802154_radio.c

@@ -259,6 +259,7 @@ static int _confirm_op(ieee802154_dev_t *dev, ieee802154_hal_op_t op, void *ctx)
     int radio_state = NRF_RADIO->STATE;
     switch (op) {
     case IEEE802154_HAL_OP_TRANSMIT:
+        info = ctx;
         eagain = (state != STATE_IDLE
             && state != STATE_CCA_BUSY && NRF_RADIO->STATE != RADIO_STATE_STATE_Disabled);
 

cpu/riscv_common/Kconfig

@@ -12,7 +12,7 @@ config CPU_ARCH_RISCV
     select HAS_NEWLIB
     select HAS_PERIPH_CORETIMER
     select HAS_PICOLIBC if '$(RIOT_CI_BUILD)' != '1'
-    #select HAS_RUST_TARGET
+    select HAS_RUST_TARGET
     select HAS_SSP
 
     select MODULE_MALLOC_THREAD_SAFE if TEST_KCONFIG

cpu/riscv_common/Makefile.features

@@ -8,7 +8,7 @@ FEATURES_PROVIDED += cpp
 FEATURES_PROVIDED += libstdcpp
 FEATURES_PROVIDED += newlib
 FEATURES_PROVIDED += periph_coretimer
-#FEATURES_PROVIDED += rust_target
+FEATURES_PROVIDED += rust_target
 FEATURES_PROVIDED += ssp
 
 # RISC-V toolchain on CI does not work properly with picolibc yet

cpu/riscv_common/ldscripts/riscv_base.ld

@@ -35,8 +35,8 @@ SECTIONS
   __stack_size     = DEFINED(__stack_size) ? __stack_size : 256;
 
   /* Populate information about rom size */
-  _srom = ORIGIN(rom);
-  _erom = ORIGIN(rom) + LENGTH(rom);
+  _srom = ORIGIN(flash);
+  _erom = ORIGIN(flash) + LENGTH(flash);
 
   .init           :
   {
@@ -220,5 +220,5 @@ SECTIONS
 
   .end_fw (NOLOAD) : ALIGN(4) {
     _end_fw = . ;
-  } > rom
+  } > flash
 }

cpu/stm32/Makefile.features

@@ -24,6 +24,16 @@ ifneq (,$(filter $(CPU_FAM),f0 f2 f3 f4 f7 l0 l1 l4 l5 u5 wb wl))
   endif
 endif
 
+STM32_WITH_BKPRAM = stm32f205% stm32f207% stm32f215% stm32f217% \
+                    stm32f405% stm32f407% stm32f415% stm32f417% \
+                    stm32f427% stm32f429% stm32f437% stm32f439% \
+                    stm32f446% stm32f469% stm32f479% \
+                    stm32f7% \
+                    stm32u5%
+ifneq (,$(filter $(STM32_WITH_BKPRAM),$(CPU_MODEL)))
+  FEATURES_PROVIDED += backup_ram
+endif
+
 # The f2, f4 and f7 do not support the pagewise api
 ifneq (,$(filter $(CPU_FAM),f2 f4 f7))
   FEATURES_PROVIDED += periph_flashpage

cpu/stm32/cpu_init.c

@@ -372,3 +372,43 @@ void cpu_init(void)
         _wlx5xx_init_subghz_debug_pins();
     }
 }
+
+void backup_ram_init(void)
+{
+/* see reference manual "Battery backup domain" */
+#if defined(RCC_APB1ENR_PWREN)
+    periph_clk_en(APB1, RCC_APB1ENR_PWREN);
+#elif defined(RCC_APBENR1_PWREN)
+    periph_clk_en(APB1, RCC_APBENR1_PWREN);
+#elif defined(RCC_APB1ENR1_PWREN)
+    periph_clk_en(APB1, RCC_APB1ENR1_PWREN);
+#elif defined(RCC_AHB3ENR_PWREN)
+    periph_clk_en(AHB3, RCC_AHB3ENR_PWREN);
+#endif
+    stmclk_dbp_unlock();
+#if defined(RCC_AHB1ENR_BKPSRAMEN)
+    periph_clk_en(AHB1, RCC_AHB1ENR_BKPSRAMEN);
+#endif
+}
+
+#ifndef BACKUP_RAM_MAGIC
+#define BACKUP_RAM_MAGIC    {'R', 'I', 'O', 'T'}
+#endif
+
+bool cpu_woke_from_backup(void)
+{
+#if IS_ACTIVE(CPU_HAS_BACKUP_RAM)
+    static const char _signature[] BACKUP_RAM_DATA = BACKUP_RAM_MAGIC;
+    /* switch off regulator to save power */
+#ifndef RIOTBOOT
+    pm_backup_regulator_off();
+#endif
+    for (unsigned i = 0; i < sizeof(_signature); i++) {
+        if (_signature[i] != ((char[])BACKUP_RAM_MAGIC)[i]) {
+            return false;
+        }
+    }
+    return true;
+#endif /* CPU_HAS_BACKUP_RAM */
+    return false;
+}

cpu/stm32/include/cpu_conf.h

@@ -67,7 +67,7 @@
 #elif CPU_FAM_STM32U5
 #include "stm32u5xx.h"
 #include "irqs/u5/irqs.h"
-#define NUM_HEAPS   2
+#define NUM_HEAPS   3
 #elif CPU_FAM_STM32WB
 #include "stm32wbxx.h"
 #include "irqs/wb/irqs.h"

cpu/stm32/include/periph/cpu_backup_ram.h

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 Otto-von-Guericke-Universität Magdeburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup         cpu_stm32
+ * @{
+ *
+ * @file
+ * @brief           Backup SRAM CPU specific definitions for the STM32 family
+ *
+ * @author          Fabian Hüßler <fabian.huessler@ovgu.de>
+ */
+
+#ifndef PERIPH_CPU_BACKUP_RAM_H
+#define PERIPH_CPU_BACKUP_RAM_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   Backup RAM must be initialized with @ref backup_ram_init on reset
+ */
+#define BACKUP_RAM_HAS_INIT         1
+
+/**
+ * @brief   Enable backup RAM access
+ */
+void backup_ram_init(void);
+
+/**
+ * @brief   Returns true if the CPU woke up from deep sleep (backup/standby)
+ */
+bool cpu_woke_from_backup(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PERIPH_CPU_BACKUP_RAM_H */
+/** @} */

cpu/stm32/include/periph/cpu_pm.h

@@ -50,6 +50,22 @@ extern "C" {
 #endif
 /** @} */
 
+/**
+ * @brief   Check whether the backup domain voltage regulator is on
+ */
+bool pm_backup_regulator_is_on(void);
+
+/**
+ * @brief   Enable the backup domain voltage regulator to retain backup
+ *          register content during standby and VBAT mode
+ */
+void pm_backup_regulator_on(void);
+
+/**
+ * @brief   Disable the backup domain voltage regulator
+ */
+void pm_backup_regulator_off(void);
+
 #ifdef __cplusplus
 }
 #endif

cpu/stm32/include/periph_cpu.h

@@ -58,6 +58,7 @@
 #include "periph/wl/periph_cpu.h"
 #endif
 
+#include "periph/cpu_backup_ram.h"
 #include "periph/cpu_common.h"
 #include "periph/cpu_dma.h"
 #include "periph/cpu_eth.h"

cpu/stm32/include/stmclk.h

@@ -22,6 +22,8 @@
 #ifndef STMCLK_H
 #define STMCLK_H
 
+#include <stdbool.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -84,6 +86,14 @@ void stmclk_dbp_unlock(void);
  */
 void stmclk_dbp_lock(void);
 
+/**
+ * @brief   Check whether write access to the backup domain is locked
+ *
+ * @retval  true: locked
+ * @retval  false: unlocked
+ */
+bool stmclk_dbp_is_locked(void);
+
 #ifdef __cplusplus
 }
 #endif

cpu/stm32/kconfigs/f2/Kconfig

@@ -9,6 +9,7 @@ config CPU_FAM_F2
     bool
     select CPU_STM32
     select CPU_CORE_CORTEX_M3
+    select HAS_BACKUP_RAM
     select HAS_CPU_STM32F2
     select HAS_CORTEXM_MPU
     select HAS_PERIPH_FLASHPAGE

cpu/stm32/kconfigs/f4/Kconfig.lines

@@ -23,12 +23,14 @@ config CPU_LINE_STM32F401XE
 config CPU_LINE_STM32F405XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select HAS_PERIPH_HWRNG
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F407XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select HAS_PERIPH_HWRNG
     select CLOCK_MAX_180MHZ
 
@@ -83,12 +85,14 @@ config CPU_LINE_STM32F413XX
 config CPU_LINE_STM32F415XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select HAS_PERIPH_HWRNG
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F417XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F423XX
@@ -99,37 +103,44 @@ config CPU_LINE_STM32F423XX
 config CPU_LINE_STM32F427XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F429XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select HAS_PERIPH_HWRNG
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F437XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select HAS_PERIPH_HWRNG
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F439XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F446XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F469XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select HAS_PERIPH_HWRNG
     select CLOCK_MAX_180MHZ
 
 config CPU_LINE_STM32F479XX
     bool
     select CPU_FAM_F4
+    select HAS_BACKUP_RAM
     select CLOCK_MAX_180MHZ

cpu/stm32/kconfigs/f7/Kconfig

@@ -9,6 +9,7 @@ config CPU_FAM_F7
     bool
     select CPU_STM32
     select CPU_CORE_CORTEX_M7
+    select HAS_BACKUP_RAM
     select HAS_CPU_STM32F7
     select HAS_CORTEXM_MPU
     select HAS_PERIPH_FLASHPAGE

cpu/stm32/kconfigs/u5/Kconfig

@@ -9,6 +9,7 @@ config CPU_FAM_U5
     bool
     select CPU_STM32
     select CPU_CORE_CORTEX_M33
+    select HAS_BACKUP_RAM
     select HAS_CPU_STM32U5
     select HAS_PERIPH_FLASHPAGE
     select HAS_PERIPH_FLASHPAGE_PAGEWISE

cpu/stm32/ldscripts/stm32.ld

@@ -31,8 +31,8 @@ SECTIONS
 {
     .heap2 ALIGN(4) (NOLOAD) :
     {
-        _sheap1 = . ;
-        _eheap1 = ORIGIN(sram4) + LENGTH(sram4);
+        _sheap2 = . ;
+        _eheap2 = ORIGIN(sram4) + LENGTH(sram4);
     } > sram4
 }
 

cpu/stm32/periph/pm.c

@@ -29,6 +29,7 @@
 
 #include "irq.h"
 #include "periph/pm.h"
+#include "periph/cpu_pm.h"
 #include "stmclk.h"
 
 #define ENABLE_DEBUG 0
@@ -137,6 +138,7 @@ void pm_set(unsigned mode)
             PWR_WUP_REG |= PM_EWUP_CONFIG;
             /* Set SLEEPDEEP bit of system control block */
             deep = 1;
+            pm_backup_regulator_on();
             break;
 #endif
         case STM32_PM_STOP:
@@ -159,3 +161,61 @@ void pm_set(unsigned mode)
 #endif
     }
 }
+
+/**
+ * @name   Registers and related configuration bits to retain
+ *         the backup domain registers, using the backup regulator
+ * @{
+ */
+#if defined(PWR_CSR1_BRE)
+#define PWR_BACKUP_REGULATOR_REG    PWR->CSR1
+#define BKPREG_CONFIG               (PWR_CSR1_BRE | PWR_CSR1_EIWUP)
+#define BKPREG_READY                (PWR_CSR1_BRR)
+#elif defined(PWR_CSR_BRE)
+#define PWR_BACKUP_REGULATOR_REG    PWR->CSR
+#define BKPREG_CONFIG               (PWR_CSR_BRE)
+#define BKPREG_READY                (PWR_CSR_BRR)
+#elif defined(PWR_CR2_BREN)
+#define PWR_BACKUP_REGULATOR_REG    PWR->CR2
+#define BKPREG_CONFIG               (PWR_CR2_BREN)
+#define BKPREG_READY                (PWR_CR2_BRRDY)
+#endif
+/** @} */
+
+bool pm_backup_regulator_is_on(void)
+{
+#if defined(PWR_BACKUP_REGULATOR_REG)
+    return (PWR_BACKUP_REGULATOR_REG & BKPREG_READY) == BKPREG_READY;
+#else
+    return false;
+#endif
+}
+
+void pm_backup_regulator_on(void)
+{
+#if defined(PWR_BACKUP_REGULATOR_REG)
+    bool locked = stmclk_dbp_is_locked();
+    if (locked) {
+        stmclk_dbp_unlock();
+    }
+    PWR_BACKUP_REGULATOR_REG |= BKPREG_CONFIG;
+    while (!(PWR_BACKUP_REGULATOR_REG & BKPREG_READY));
+    if (locked) {
+        stmclk_dbp_lock();
+    }
+#endif
+}
+
+void pm_backup_regulator_off(void)
+{
+#if defined(PWR_BACKUP_REGULATOR_REG)
+    bool locked = stmclk_dbp_is_locked();
+    if (locked) {
+        stmclk_dbp_unlock();
+    }
+    PWR_BACKUP_REGULATOR_REG &= ~BKPREG_CONFIG;
+    if (locked) {
+        stmclk_dbp_lock();
+    }
+#endif
+}

cpu/stm32/periph/spi.c

@@ -192,7 +192,7 @@ int spi_init_cs(spi_t bus, spi_cs_t cs)
 }
 
 #ifdef MODULE_PERIPH_SPI_GPIO_MODE
-int spi_init_with_gpio_mode(spi_t bus, spi_gpio_mode_t mode)
+int spi_init_with_gpio_mode(spi_t bus, const spi_gpio_mode_t* mode)
 {
     assert(bus < SPI_NUMOF);
 
@@ -203,17 +203,17 @@ int spi_init_with_gpio_mode(spi_t bus, spi_gpio_mode_t mode)
     return ret;
 #else
     if (gpio_is_valid(spi_config[bus].mosi_pin)) {
-        ret += gpio_init(spi_config[bus].mosi_pin, mode.mosi);
+        ret += gpio_init(spi_config[bus].mosi_pin, mode->mosi);
         gpio_init_af(spi_config[bus].mosi_pin, spi_config[bus].mosi_af);
     }
 
     if (gpio_is_valid(spi_config[bus].miso_pin)) {
-        ret += gpio_init(spi_config[bus].miso_pin, mode.miso);
+        ret += gpio_init(spi_config[bus].miso_pin, mode->miso);
         gpio_init_af(spi_config[bus].miso_pin, spi_config[bus].miso_af);
     }
 
     if (gpio_is_valid(spi_config[bus].sclk_pin)) {
-        ret += gpio_init(spi_config[bus].sclk_pin, mode.sclk);
+        ret += gpio_init(spi_config[bus].sclk_pin, mode->sclk);
         gpio_init_af(spi_config[bus].sclk_pin, spi_config[bus].sclk_af);
     }
     return ret;

cpu/stm32/stm32_mem_lengths.mk

@@ -90,6 +90,10 @@ ifeq ($(STM32_TYPE), F)
     else ifeq ($(STM32_MODEL3), 7)
       RAM_LEN = 128K
     endif
+    ifneq (, $(filter $(STM32_MODEL), 205 207 215 217))
+      BACKUP_RAM_ADDR = 0x40024000
+      BACKUP_RAM_LEN = 0x4K
+    endif
   else ifeq ($(STM32_FAMILY), 3)
     ifeq ($(STM32_MODEL), 301)
       RAM_LEN = 16K
@@ -167,6 +171,10 @@ ifeq ($(STM32_TYPE), F)
     ifneq (, $(filter $(STM32_MODEL3), 5 7 9))
       CCMRAM_LEN = 64K
     endif
+    ifneq (, $(filter $(STM32_MODEL), 405 407 415 417 427 429 437 439 446 469 479))
+      BACKUP_RAM_ADDR = 0x40024000
+      BACKUP_RAM_LEN = 0x4K
+    endif
   else ifeq ($(STM32_FAMILY),7)
     ifneq (, $(filter $(STM32_MODEL2), 2 3))
       RAM_LEN = 256K
@@ -175,6 +183,8 @@ ifeq ($(STM32_TYPE), F)
     else ifneq (, $(filter $(STM32_MODEL2), 6 7))
       RAM_LEN = 512K
     endif
+    BACKUP_RAM_ADDR = 0x40024000
+    BACKUP_RAM_LEN = 0x4K
   endif
 else ifeq ($(STM32_TYPE), G)
   ifeq ($(STM32_FAMILY), 0)
@@ -271,6 +281,8 @@ else ifeq ($(STM32_TYPE), U)
     ifneq (, $(filter $(STM32_MODEL2), 7 8))
       RAM_LEN = 768K
       SRAM4_LEN = 16K
+      BACKUP_RAM_ADDR = 0x40036400
+      BACKUP_RAM_LEN = 0x2K
     endif
   endif
 else ifeq ($(STM32_TYPE), W)

cpu/stm32/stmclk/stmclk_common.c

@@ -115,5 +115,14 @@ void stmclk_dbp_unlock(void)
 
 void stmclk_dbp_lock(void)
 {
-    PWR->REG_PWR_CR &= ~(BIT_CR_DBP);
+    if (!IS_ACTIVE(CPU_HAS_BACKUP_RAM)) {
+/*  The DBP must be unlocked all the time, if we modify
+    backup RAM content by comfortable BACKUP_RAM variables */
+        PWR->REG_PWR_CR &= ~(BIT_CR_DBP);
+    }
+}
+
+bool stmclk_dbp_is_locked(void)
+{
+    return !(PWR->REG_PWR_CR & BIT_CR_DBP);
 }

cpu/stm32/stmclk/stmclk_u5.c

@@ -246,6 +246,11 @@ void stmclk_init_sysclk(void)
     /* Wait Until the Voltage Regulator is ready */
     while (!(PWR->VOSR & PWR_VOSR_VOSRDY)) {}
 
+    /* Backup RAM retention in Standby and VBAT modes:
+       This bit can be written only when the regulator is LDO,
+       which must be configured before switching to SMPS */
+    PWR->BDCR1 |= PWR_BDCR1_BREN;
+
     /* Switch to SMPS regulator instead of LDO */
     PWR->CR3 |= PWR_CR3_REGSEL;
     while (!(PWR->SVMSR & PWR_SVMSR_REGS)) {}

dist/testbed-support/makefile.iotlab.archi.inc.mk

@@ -13,8 +13,10 @@ IOTLAB_ARCHI_nrf52dk        = nrf52dk:ble
 IOTLAB_ARCHI_nrf52832-mdk   = nrf52832mdk:ble
 IOTLAB_ARCHI_nrf52840dk     = nrf52840dk:multi
 IOTLAB_ARCHI_nrf52840-mdk   = nrf52840mdk:multi
+IOTLAB_ARCHI_nucleo-wl55jc  = nucleo-wl55jc:stm32wl
 IOTLAB_ARCHI_pba-d-01-kw2x  = phynode:kw2xrf
 IOTLAB_ARCHI_samr21-xpro    = samr21:at86rf233
 IOTLAB_ARCHI_samr30-xpro    = samr30:at86rf212b
+IOTLAB_ARCHI_samr34-xpro    = samr34:sx1276
 IOTLAB_ARCHI_zigduino       = zigduino:atmega128rfa1
 IOTLAB_ARCHI := $(IOTLAB_ARCHI_$(BOARD))

dist/tools/compile_commands/compile_commands.py

@@ -228,6 +228,9 @@ def generate_module_compile_commands(path, state, args):
         except ValueError:
             pass
 
+    if args.clangd:
+        cdetails.cflags.append('-Wno-unknown-warning-option')
+
     c_extra_includes = []
     cxx_extra_includes = []
 
@@ -288,14 +291,16 @@ if __name__ == '__main__':
                         help='Drop the given flag, if present (repeatable)')
     parser.add_argument('--clangd', default=False, action='store_const', const=True,
                         help='Shorthand for --add-built-in-includes --add-libstdxx-includes ' +
-                             '--filter-out=-Wformat-truncation --filter-out=-Wformat-overflow ' +
-                             '--filter-out=-mno-thumb-interwork')
+                             'and some CFLAG adjustments throughy --filter-out, and ignores ' +
+                             'unknown warning flags')
     _args = parser.parse_args()
     if _args.clangd:
         _args.add_built_in_includes = True
         _args.add_libstdcxx_includes = True
-        _args.filter_out = ['-Wformat-truncation', '-Wformat-overflow', '-mno-thumb-interwork',
+        _args.filter_out = ['-mno-thumb-interwork',
                             # Only even included for versions of GCC that support it
                             '-malign-data=natural',
+                            # Only supported starting with clang 11
+                            '-msmall-data-limit=8',
                             ]
     generate_compile_commands(_args)

dist/tools/doccheck/exclude_patterns

@@ -13357,6 +13357,7 @@ drivers/sx127x/include/sx127x_registers\.h:[0-9]+: warning: Member SX127X_RNG_RE
 drivers/sx127x/include/sx127x_registers\.h:[0-9]+: warning: Member SX127X_RNG_REG_MODEM_CONFIG2 \(macro definition\) of file sx127x_registers\.h is not documented\.
 drivers/sx127x/include/sx127x_registers\.h:[0-9]+: warning: Member VERSION_SX1272 \(macro definition\) of file sx127x_registers\.h is not documented\.
 drivers/sx127x/include/sx127x_registers\.h:[0-9]+: warning: Member VERSION_SX1276 \(macro definition\) of file sx127x_registers\.h is not documented\.
+drivers/sx127x/include/sx127x_registers\.h:[0-9]+: warning: Member VERSION_SX1276_WLR089 \(macro definition\) of file sx127x_registers\.h is not documented\.
 drivers/tcs37727/include/tcs37727\-internal\.h:[0-9]+: warning: Member B_COEF_IF \(macro definition\) of file tcs37727\-internal\.h is not documented\.
 drivers/tcs37727/include/tcs37727\-internal\.h:[0-9]+: warning: Member CT_COEF_IF \(macro definition\) of file tcs37727\-internal\.h is not documented\.
 drivers/tcs37727/include/tcs37727\-internal\.h:[0-9]+: warning: Member CT_OFFSET_IF \(macro definition\) of file tcs37727\-internal\.h is not documented\.
@@ -14368,22 +14369,22 @@ sys/include/net/iana/portrange\.h:[0-9]+: warning: Member IANA_SYSTEM_PORTRANGE_
 sys/include/net/iana/portrange\.h:[0-9]+: warning: Member IANA_SYSTEM_PORTRANGE_MIN \(macro definition\) of group net_iana_portrange is not documented\.
 sys/include/net/iana/portrange\.h:[0-9]+: warning: Member IANA_USER_PORTRANGE_MAX \(macro definition\) of group net_iana_portrange is not documented\.
 sys/include/net/iana/portrange\.h:[0-9]+: warning: Member IANA_USER_PORTRANGE_MIN \(macro definition\) of group net_iana_portrange is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_DST_ADDR_MASK \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_LEN \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_SRC_ADDR_MASK \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_ACK \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_BEACON \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_DATA \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_MACCMD \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_MASK \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_VERS_MASK \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_VERS_V0 \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_VERS_V1 \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCS_LEN \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_MIN_FRAME_LEN \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_PHY_MR_FSK_2FSK_CODED_SFD_1 \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_PHY_MR_FSK_2FSK_UNCODED_SFD_0 \(macro definition\) of group net_ieee802154 is not documented\.
-sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_PHY_MR_FSK_2FSK_UNCODED_SFD_1 \(macro definition\) of group net_ieee802154 is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_DST_ADDR_MASK \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_LEN \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_SRC_ADDR_MASK \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_ACK \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_BEACON \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_DATA \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_MACCMD \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_TYPE_MASK \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_VERS_MASK \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_VERS_V0 \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCF_VERS_V1 \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_FCS_LEN \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_MIN_FRAME_LEN \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_PHY_MR_FSK_2FSK_CODED_SFD_1 \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_PHY_MR_FSK_2FSK_UNCODED_SFD_0 \(macro definition\) of group net_ieee802154_header is not documented\.
+sys/include/net/ieee802154\.h:[0-9]+: warning: Member IEEE802154_PHY_MR_FSK_2FSK_UNCODED_SFD_1 \(macro definition\) of group net_ieee802154_header is not documented\.
 sys/include/net/lora\.h:[0-9]+: warning: unbalanced grouping commands
 sys/include/net/loramac\.h:[0-9]+: warning: unbalanced grouping commands
 sys/include/net/mqttsn\.h:[0-9]+: warning: Member MQTTSN_CLI_ID_MAXLEN \(macro definition\) of group net_mqttsn is not documented\.
@@ -14705,3 +14706,4 @@ drivers/ft5x06/include/ft5x06_constants\.h:[0-9]+: warning: Member FT5X06_G_MODE
 drivers/ft5x06/include/ft5x06_constants\.h:[0-9]+: warning: Member FT5X06_G_MODE_INTERRUPT_SHIFT \(macro definition\) of file ft5x06_constants\.h is not documented\.
 drivers/ft5x06/include/ft5x06_constants\.h:[0-9]+: warning: Member FT5X06_G_MODE_INTERRUPT_POLLING \(macro definition\) of file ft5x06_constants\.h is not documented\.
 drivers/ft5x06/include/ft5x06_constants\.h:[0-9]+: warning: Member FT5X06_G_MODE_INTERRUPT_TRIGGER \(macro definition\) of file ft5x06_constants\.h is not documented\.
+drivers/ft5x06/include/ft5x06_params\.h:[0-9]+: warning: Member FT5X06_PARAM_TYPE \(macro definition\) of file ft5x06_params\.h is not documented\.

dist/tools/zep_dispatch/README.md

@@ -144,3 +144,20 @@ instance [0 | Iface: 7 | mop: 2 | ocp: 0 | mhri: 256 | mri 0]
 ```
 
 This should also be visible in Foren6.
+
+Topology generation
+-------------------
+
+To generate a random topology use the `topogen.sh` script.
+This will randomly distribute *N* nodes on on a *W* × *H* map.
+Each node has a radio range *R* ± *V* where *V* is a random variance that can also be set to 0.
+
+The further away a node is from a sending node, the higher the packet loss probability.
+Nodes outside the sending radius have a zero probability of receiving a packet.
+
+If you have `gnuplot` installed this will also generate a plot of the resulting node distribution:
+
+![example topology](https://gist.githubusercontent.com/benpicco/6fd6f7c79a30cbbc41c3a65e53ed3682/raw/33afb859b65d949238129096858d14e2319fb5fb/network.topo.svg)
+
+A light color means that a node only has a one-way connection to the network, gray means a node is
+entirely isolated.

dist/tools/zep_dispatch/topogen.sh

@@ -16,11 +16,11 @@ else
     CRESET=
 fi
 
-WIDTH=100
-HEIGHT=100
-RANGE=30
-VARIANCE=15
-NUM=10
+WIDTH=100	# X dimension of the simulated world
+HEIGHT=100	# Y dimension of the simulated world
+RANGE=30	# base node radio range
+VARIANCE=15	# random offset to radio range
+NUM=10		# number of nodes
 
 echo "writing to $FILE"
 

doc.txt

@@ -41,7 +41,8 @@
  * The following list of what `DEVELHELP=1` enables is not comprehensive, but
  * should give a rough impression of what to expect:
  *
- * * Many runtime checks are enabled (stack overflow protection, warnings when
+ * * Many runtime checks are enabled (stack overflow protection by means of
+ *   @ref pseudomodule_mpu_stack_guard or @ref SCHED_TEST_STACK, warnings when
  *   sending messages to invalid PIDs, …), some of which just log errors to
  *   stdout, some even halt the system.
  * * Some structures contain additional information, e.g. threads store their

doc/doxygen/riot.doxyfile

@@ -32,7 +32,7 @@ DOXYFILE_ENCODING      = UTF-8
 # title of most generated pages and in a few other places.
 # The default value is: My Project.
 
-PROJECT_NAME           =
+PROJECT_NAME           = "RIOT OS"
 
 # The PROJECT_NUMBER tag can be used to enter a project or revision number. This
 # could be handy for archiving the generated documentation or if some version
@@ -275,7 +275,9 @@ OPTIMIZE_OUTPUT_VHDL   = NO
 # Note that for custom extensions you also need to set FILE_PATTERNS otherwise
 # the files are not read by doxygen.
 
-EXTENSION_MAPPING      =
+# Python is close enough that we can have Makefile comments starting with `##`
+# that are both recognized by Doxygen and comments to Make
+EXTENSION_MAPPING      = mk=Python
 
 # If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all comments
 # according to the Markdown format, which allows for more readable
@@ -771,7 +773,8 @@ INPUT                  = ../../doc.txt \
                          src/emulators.md \
                          src/release-cycle.md \
                          src/changelog.md \
-                         ../../LOSTANDFOUND.md
+                         ../../LOSTANDFOUND.md \
+                         ../../makefiles/pseudomodules.inc.mk
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses

doc/doxygen/src/using-rust.md

@@ -125,7 +125,7 @@ $ rustup component add --toolchain nightly-2019-12-05 rustfmt rustc-dev
 $ cargo +nightly-2019-12-05 install c2rust
 $ git clone https://github.com/chrysn-pull-requests/c2rust -b for-riot
 $ cd c2rust
-$ cargo +nightly-2019-12-05 install --path c2rust
+$ cargo +nightly-2019-12-05 install --locked --path c2rust
 ```
 
 [cargo]: https://doc.rust-lang.org/cargo/

drivers/at/at.c

@@ -174,7 +174,7 @@ int at_send_cmd(at_dev_t *dev, const char *command, uint32_t timeout)
     uart_write(dev->uart, (const uint8_t *)command, cmdlen);
     uart_write(dev->uart, (const uint8_t *)CONFIG_AT_SEND_EOL, AT_SEND_EOL_LEN);
 
-    if (AT_SEND_ECHO) {
+    if (!IS_ACTIVE(CONFIG_AT_SEND_SKIP_ECHO)) {
         if (at_expect_bytes(dev, command, timeout)) {
             return -1;
         }

drivers/atwinc15x0/atwinc15x0_netdev.c

@@ -372,7 +372,7 @@ static int _atwinc15x0_get(netdev_t *netdev, netopt_t opt, void *val,
             return sizeof(uint16_t);
 
         case NETOPT_RSSI:
-            assert(max_len == sizeof(int8_t));
+            assert(max_len == sizeof(int16_t));
             _rssi_info_ready = false;
             /* trigger the request current RSSI (asynchronous function) */
             if (m2m_wifi_req_curr_rssi() != M2M_SUCCESS) {
@@ -384,8 +384,8 @@ static int _atwinc15x0_get(netdev_t *netdev, netopt_t opt, void *val,
                 ztimer_sleep(ZTIMER_MSEC, ATWINC15X0_WAIT_TIME_MS);
             }
             /* return the RSSI */
-            *((int8_t *)val) = dev->rssi;
-            return sizeof(int8_t);
+            *((int16_t *)val) = dev->rssi;
+            return sizeof(int16_t);
 
         default:
             return netdev_eth_get(netdev, opt, val, max_len);

drivers/dose/Makefile.dep

@@ -3,8 +3,13 @@ FEATURES_REQUIRED += periph_uart
 FEATURES_OPTIONAL += periph_uart_collision
 FEATURES_OPTIONAL += periph_uart_rxstart_irq
 
+ifneq (,$(filter dose_watchdog,$(USEMODULE)))
+  FEATURES_REQUIRED += periph_timer_periodic
+endif
+
+USEMODULE += chunked_ringbuffer
 USEMODULE += eui_provider
 USEMODULE += iolist
 USEMODULE += netdev_eth
 USEMODULE += random
-USEMODULE += xtimer
+USEMODULE += ztimer_usec

drivers/dose/Makefile.include

@@ -1,2 +1,4 @@
 USEMODULE_INCLUDES_dose := $(LAST_MAKEFILEDIR)/include
 USEMODULE_INCLUDES += $(USEMODULE_INCLUDES_dose)
+
+PSEUDOMODULES += dose_watchdog

drivers/dose/dose.c

@@ -14,7 +14,7 @@
  * @brief       Implementation of the Differentially Operated Serial Ethernet driver
  *
  * @author      Juergen Fitschen <me@jue.yt>
- *
+ *              Benjamin Valentin <benjamin.valentin@ml-pa.com>
  * @}
  */
 
@@ -24,9 +24,11 @@
 #include "dose.h"
 #include "random.h"
 #include "irq.h"
+#include "periph/timer.h"
 
 #include "net/eui_provider.h"
 #include "net/netdev/eth.h"
+#include "timex.h"
 
 #define ENABLE_DEBUG 0
 #include "debug.h"
@@ -39,7 +41,7 @@ static dose_signal_t state_transit_send(dose_t *ctx, dose_signal_t signal);
 static void state(dose_t *ctx, dose_signal_t src);
 static void _isr_uart(void *arg, uint8_t c);
 static void _isr_gpio(void *arg);
-static void _isr_xtimer(void *arg);
+static void _isr_ztimer(void *arg);
 static void clear_recv_buf(dose_t *ctx);
 static void _isr(netdev_t *netdev);
 static int _recv(netdev_t *dev, void *buf, size_t len, void *info);
@@ -62,6 +64,14 @@ static uint16_t crc16_update(uint16_t crc, uint8_t octet)
     return crc;
 }
 
+static void _crc_cb(void *ctx, uint8_t *data, size_t len)
+{
+    uint16_t *crc = ctx;
+    for (uint8_t *end = data + len; data != end; ++data) {
+        *crc = crc16_update(*crc, *data);
+    }
+}
+
 static void _init_standby(dose_t *ctx, const dose_params_t *params)
 {
     ctx->standby_pin = params->standby_pin;
@@ -107,35 +117,76 @@ static inline void _disable_sense(dose_t *ctx)
 #endif
 }
 
+#ifdef MODULE_DOSE_WATCHDOG
+static unsigned _watchdog_users;
+static dose_t *_dose_base;
+static uint8_t _dose_numof;
+
+static inline void _watchdog_start(void)
+{
+    if (_watchdog_users) {
+        return;
+    }
+
+    _watchdog_users++;
+    timer_start(DOSE_TIMER_DEV);
+}
+
+static inline void _watchdog_stop(void)
+{
+    if (_watchdog_users == 0 || --_watchdog_users) {
+        return;
+    }
+
+    timer_stop(DOSE_TIMER_DEV);
+}
+
+static void _dose_watchdog_cb(void *arg, int chan)
+{
+    (void) chan;
+    (void) arg;
+
+    for (unsigned i = 0; i < _dose_numof; ++i) {
+        dose_t *ctx = &_dose_base[i];
+
+        switch (ctx->state) {
+        case DOSE_STATE_RECV:
+            if (ctx->recv_buf_ptr_last != ctx->rb.cur) {
+                ctx->recv_buf_ptr_last = ctx->rb.cur;
+                break;
+            }
+
+            if (ctx->flags & DOSE_FLAG_RECV_BUF_DIRTY) {
+                break;
+            }
+
+            DEBUG_PUTS("timeout");
+            state(&_dose_base[i], DOSE_SIGNAL_ZTIMER);
+            break;
+        default:
+            break;
+        }
+    }
+}
+
+static void _watchdog_init(unsigned timeout_us)
+{
+    timer_init(DOSE_TIMER_DEV, US_PER_SEC, _dose_watchdog_cb, NULL);
+    timer_set_periodic(DOSE_TIMER_DEV, 0, timeout_us, TIM_FLAG_RESET_ON_MATCH);
+    timer_stop(DOSE_TIMER_DEV);
+}
+#else
+static inline void _watchdog_start(void) {}
+static inline void _watchdog_stop(void) {}
+#endif
+
 static dose_signal_t state_transit_blocked(dose_t *ctx, dose_signal_t signal)
 {
-    uint32_t backoff;
     (void) signal;
+    uint32_t backoff;
 
-    if (ctx->state == DOSE_STATE_RECV) {
-        /* We got here from RECV state. The driver's thread has to look
-         * if this frame should be processed. By queuing NETDEV_EVENT_ISR,
-         * the netif thread will call _isr at some time. */
-        SETBIT(ctx->flags, DOSE_FLAG_RECV_BUF_DIRTY);
-        netdev_trigger_event_isr(&ctx->netdev);
-    }
-
-    /* Enable interrupt for start bit sensing */
-    _enable_sense(ctx);
-
-    /* The timeout will bring us back into IDLE state by a random time.
-     * If we entered this state from RECV state, the random time lays
-     * in the interval [1 * timeout, 2 * timeout]. If we came from
-     * SEND state, a time in the interval [2 * timeout, 3 * timeout]
-     * will be picked. This ensures that responding nodes get preferred
-     * bus access and sending nodes do not overwhelm listening nodes. */
-    if (ctx->state == DOSE_STATE_SEND) {
-        backoff = random_uint32_range(2 * ctx->timeout_base, 3 * ctx->timeout_base);
-    }
-    else {
-        backoff = random_uint32_range(1 * ctx->timeout_base, 2 * ctx->timeout_base);
-    }
-    xtimer_set(&ctx->timeout, backoff);
+    backoff = random_uint32_range(0, 2 * ctx->timeout_base);
+    ztimer_set(ZTIMER_USEC, &ctx->timeout, backoff);
 
     return DOSE_SIGNAL_NONE;
 }
@@ -145,6 +196,30 @@ static dose_signal_t state_transit_idle(dose_t *ctx, dose_signal_t signal)
     (void) ctx;
     (void) signal;
 
+    _watchdog_stop();
+
+    if (ctx->state == DOSE_STATE_RECV) {
+        bool dirty = ctx->flags & DOSE_FLAG_RECV_BUF_DIRTY;
+        bool done  = ctx->flags & DOSE_FLAG_END_RECEIVED;
+
+        /* We got here from RECV state. The driver's thread has to look
+         * if this frame should be processed. By queuing NETDEV_EVENT_ISR,
+         * the netif thread will call _isr at some time. */
+        if (crb_end_chunk(&ctx->rb, !dirty && done)) {
+            netdev_trigger_event_isr(&ctx->netdev);
+        }
+
+        clear_recv_buf(ctx);
+    }
+
+    /* Enable interrupt for start bit sensing */
+    _enable_sense(ctx);
+
+    /* Execute pending send */
+    if (ctx->flags & DOSE_FLAG_SEND_PENDING) {
+        return DOSE_SIGNAL_SEND;
+    }
+
     return DOSE_SIGNAL_NONE;
 }
 
@@ -156,11 +231,14 @@ static dose_signal_t state_transit_recv(dose_t *ctx, dose_signal_t signal)
         /* We freshly entered this state. Thus, no start bit sensing is required
          * anymore. Disable RX Start IRQs during the transmission. */
         _disable_sense(ctx);
+        _watchdog_start();
+        crb_start_chunk(&ctx->rb);
     }
 
     if (signal == DOSE_SIGNAL_UART) {
         /* We received a new octet */
-        int esc = (ctx->flags & DOSE_FLAG_ESC_RECEIVED);
+        bool esc   = ctx->flags & DOSE_FLAG_ESC_RECEIVED;
+        bool dirty = ctx->flags & DOSE_FLAG_RECV_BUF_DIRTY;
         if (!esc && ctx->uart_octet == DOSE_OCTET_ESC) {
             SETBIT(ctx->flags, DOSE_FLAG_ESC_RECEIVED);
         }
@@ -172,19 +250,16 @@ static dose_signal_t state_transit_recv(dose_t *ctx, dose_signal_t signal)
             if (esc) {
                 CLRBIT(ctx->flags, DOSE_FLAG_ESC_RECEIVED);
             }
-            /* Since the dirty flag is set after the RECV state is left,
-             * it indicates that the receive buffer contains unprocessed data
-             * from a previously received frame. Thus, we just ignore new data. */
-            if (!(ctx->flags & DOSE_FLAG_RECV_BUF_DIRTY)
-                && ctx->recv_buf_ptr < DOSE_FRAME_LEN) {
-                ctx->recv_buf[ctx->recv_buf_ptr++] = ctx->uart_octet;
+
+            if (!dirty && !crb_add_byte(&ctx->rb, ctx->uart_octet)) {
+                SETBIT(ctx->flags, DOSE_FLAG_RECV_BUF_DIRTY);
             }
         }
     }
 
-    if (rc == DOSE_SIGNAL_NONE) {
+    if (rc == DOSE_SIGNAL_NONE && !IS_ACTIVE(MODULE_DOSE_WATCHDOG)) {
         /* No signal is returned. We stay in the RECV state. */
-        xtimer_set(&ctx->timeout, ctx->timeout_base);
+        ztimer_set(ZTIMER_USEC, &ctx->timeout, ctx->timeout_base);
     }
 
     return rc;
@@ -203,8 +278,9 @@ static dose_signal_t state_transit_send(dose_t *ctx, dose_signal_t signal)
      * will bring us back to the BLOCKED state after _send has emitted
      * its last octet. */
 #ifndef MODULE_PERIPH_UART_COLLISION
-    xtimer_set(&ctx->timeout, ctx->timeout_base);
+    ztimer_set(ZTIMER_USEC, &ctx->timeout, ctx->timeout_base);
 #endif
+
     return DOSE_SIGNAL_NONE;
 }
 
@@ -220,16 +296,16 @@ static void state(dose_t *ctx, dose_signal_t signal)
          * last 4 bits of a uint8_t, they can be added together and hence
          * be checked together. */
         switch (ctx->state + signal) {
-            case DOSE_STATE_INIT + DOSE_SIGNAL_INIT:
-            case DOSE_STATE_RECV + DOSE_SIGNAL_END:
-            case DOSE_STATE_RECV + DOSE_SIGNAL_XTIMER:
-            case DOSE_STATE_SEND + DOSE_SIGNAL_END:
-            case DOSE_STATE_SEND + DOSE_SIGNAL_XTIMER:
+            case DOSE_STATE_IDLE + DOSE_SIGNAL_SEND:
                 signal = state_transit_blocked(ctx, signal);
                 ctx->state = DOSE_STATE_BLOCKED;
                 break;
 
-            case DOSE_STATE_BLOCKED + DOSE_SIGNAL_XTIMER:
+            case DOSE_STATE_SEND + DOSE_SIGNAL_END:
+            case DOSE_STATE_SEND + DOSE_SIGNAL_ZTIMER:
+            case DOSE_STATE_INIT + DOSE_SIGNAL_INIT:
+            case DOSE_STATE_RECV + DOSE_SIGNAL_END:
+            case DOSE_STATE_RECV + DOSE_SIGNAL_ZTIMER:
                 signal = state_transit_idle(ctx, signal);
                 ctx->state = DOSE_STATE_IDLE;
                 break;
@@ -243,14 +319,14 @@ static void state(dose_t *ctx, dose_signal_t signal)
                 ctx->state = DOSE_STATE_RECV;
                 break;
 
-            case DOSE_STATE_IDLE + DOSE_SIGNAL_SEND:
+            case DOSE_STATE_BLOCKED + DOSE_SIGNAL_ZTIMER:
             case DOSE_STATE_SEND + DOSE_SIGNAL_UART:
                 signal = state_transit_send(ctx, signal);
                 ctx->state = DOSE_STATE_SEND;
                 break;
 
             default:
-                DEBUG("dose state(): unexpected state transition (STATE=0x%02d SIGNAL=0x%02d)\n", ctx->state, signal);
+                DEBUG("dose state(): unexpected state transition (STATE=0x%02x SIGNAL=0x%02x)\n", ctx->state, signal);
                 signal = DOSE_SIGNAL_NONE;
         }
     } while (signal != DOSE_SIGNAL_NONE);
@@ -275,18 +351,30 @@ static void _isr_gpio(void *arg)
     state(dev, DOSE_SIGNAL_GPIO);
 }
 
-static void _isr_xtimer(void *arg)
+static void _isr_ztimer(void *arg)
 {
     dose_t *dev = arg;
 
-    state(dev, DOSE_SIGNAL_XTIMER);
+    switch (dev->state) {
+#ifndef MODULE_DOSE_WATCHDOG
+    case DOSE_STATE_RECV:
+#endif
+    case DOSE_STATE_BLOCKED:
+    case DOSE_STATE_SEND:
+        state(dev, DOSE_SIGNAL_ZTIMER);
+        break;
+    default:
+        ;
+    }
 }
 
 static void clear_recv_buf(dose_t *ctx)
 {
     unsigned irq_state = irq_disable();
 
-    ctx->recv_buf_ptr = 0;
+#ifdef MODULE_DOSE_WATCHDOG
+    ctx->recv_buf_ptr_last = NULL;
+#endif
     CLRBIT(ctx->flags, DOSE_FLAG_RECV_BUF_DIRTY);
     CLRBIT(ctx->flags, DOSE_FLAG_END_RECEIVED);
     CLRBIT(ctx->flags, DOSE_FLAG_ESC_RECEIVED);
@@ -295,58 +383,39 @@ static void clear_recv_buf(dose_t *ctx)
 
 static void _isr(netdev_t *netdev)
 {
+    uint8_t dst[ETHERNET_ADDR_LEN];
     dose_t *ctx = container_of(netdev, dose_t, netdev);
-    unsigned irq_state;
-    int dirty, end;
-
-    /* Get current flags atomically */
-    irq_state = irq_disable();
-    dirty = (ctx->flags & DOSE_FLAG_RECV_BUF_DIRTY);
-    end = (ctx->flags & DOSE_FLAG_END_RECEIVED);
-    irq_restore(irq_state);
-
-    /* If the receive buffer does not contain any data just abort ... */
-    if (!dirty) {
-        DEBUG("dose _isr(): no frame -> drop\n");
-        return;
-    }
-
-    /* If we haven't received a valid END octet just drop the incomplete frame. */
-    if (!end) {
-        DEBUG("dose _isr(): incomplete frame -> drop\n");
-        clear_recv_buf(ctx);
-        return;
-    }
-
-    /* The set dirty flag prevents recv_buf or recv_buf_ptr from being
-     * touched in ISR context. Thus, it is safe to work with them without
-     * IRQs being disabled or mutexes being locked. */
+    size_t len;
 
     /* Check for minimum length of an Ethernet packet */
-    if (ctx->recv_buf_ptr < sizeof(ethernet_hdr_t) + DOSE_FRAME_CRC_LEN) {
+    if (!crb_get_chunk_size(&ctx->rb, &len) ||
+        len < sizeof(ethernet_hdr_t) + DOSE_FRAME_CRC_LEN) {
         DEBUG("dose _isr(): frame too short -> drop\n");
-        clear_recv_buf(ctx);
+        crb_consume_chunk(&ctx->rb, NULL, 0);
         return;
     }
 
     /* Check the dst mac addr if the iface is not in promiscuous mode */
     if (!(ctx->opts & DOSE_OPT_PROMISCUOUS)) {
-        ethernet_hdr_t *hdr = (ethernet_hdr_t *) ctx->recv_buf;
-        if ((hdr->dst[0] & 0x1) == 0 && memcmp(hdr->dst, ctx->mac_addr.uint8, ETHERNET_ADDR_LEN) != 0) {
+
+        /* get destination address - length of RX frame has ben checked before */
+        crb_peek_bytes(&ctx->rb, dst, offsetof(ethernet_hdr_t, dst), sizeof(dst));
+
+        /* destination has to be either broadcast or our address */
+        if ((dst[0] & 0x1) == 0 && memcmp(dst, ctx->mac_addr.uint8, ETHERNET_ADDR_LEN) != 0) {
             DEBUG("dose _isr(): dst mac not matching -> drop\n");
-            clear_recv_buf(ctx);
+            crb_consume_chunk(&ctx->rb, NULL, 0);
             return;
         }
     }
 
     /* Check the CRC */
     uint16_t crc = 0xffff;
-    for (size_t i = 0; i < ctx->recv_buf_ptr; i++) {
-        crc = crc16_update(crc, ctx->recv_buf[i]);
-    }
+    crb_chunk_foreach(&ctx->rb, _crc_cb, &crc);
+
     if (crc != 0x0000) {
         DEBUG("dose _isr(): wrong crc 0x%04x -> drop\n", crc);
-        clear_recv_buf(ctx);
+        crb_consume_chunk(&ctx->rb, NULL, 0);
         return;
     }
 
@@ -361,28 +430,21 @@ static int _recv(netdev_t *dev, void *buf, size_t len, void *info)
 
     (void)info;
 
-    size_t pktlen = ctx->recv_buf_ptr - DOSE_FRAME_CRC_LEN;
     if (!buf && !len) {
+        size_t pktlen;
         /* Return the amount of received bytes */
-        return pktlen;
+        if (crb_get_chunk_size(&ctx->rb, &pktlen)) {
+            return pktlen - DOSE_FRAME_CRC_LEN;
+        } else {
+            return 0;
+        }
     }
-    else if (!buf && len) {
-        /* The user drops the packet */
-        clear_recv_buf(ctx);
-        return pktlen;
-    }
-    else if (len < pktlen) {
-        /* The provided buffer is too small! */
-        DEBUG("dose _recv(): receive buffer too small\n");
-        clear_recv_buf(ctx);
+
+    if (crb_consume_chunk(&ctx->rb, buf, len)) {
+        return len;
+    } else {
         return -1;
     }
-    else {
-        /* Copy the packet to the provided buffer. */
-        memcpy(buf, ctx->recv_buf, pktlen);
-        clear_recv_buf(ctx);
-        return pktlen;
-    }
 }
 
 static uint8_t wait_for_state(dose_t *ctx, uint8_t state)
@@ -451,7 +513,7 @@ static inline void _send_done(dose_t *ctx, bool collision)
 #ifdef MODULE_PERIPH_UART_COLLISION
     uart_collision_detect_disable(ctx->uart);
     if (collision) {
-        state(ctx, DOSE_SIGNAL_XTIMER);
+        state(ctx, DOSE_SIGNAL_ZTIMER);
     }
 #else
     (void)ctx;
@@ -480,11 +542,13 @@ send:
     crc = 0xffff;
     pktlen = 0;
 
-    /* Switch to state SEND */
-    do {
-        wait_for_state(ctx, DOSE_STATE_IDLE);
-        state(ctx, DOSE_SIGNAL_SEND);
-    } while (wait_for_state(ctx, DOSE_STATE_ANY) != DOSE_STATE_SEND);
+    /* Indicate intention to send */
+    SETBIT(ctx->flags, DOSE_FLAG_SEND_PENDING);
+    state(ctx, DOSE_SIGNAL_SEND);
+
+    /* Wait for transition to SEND state */
+    wait_for_state(ctx, DOSE_STATE_SEND);
+    CLRBIT(ctx->flags, DOSE_FLAG_SEND_PENDING);
 
     _send_start(ctx);
 
@@ -667,9 +731,9 @@ static int _init(netdev_t *dev)
     /* Set state machine to defaults */
     irq_state = irq_disable();
     ctx->opts = 0;
-    ctx->recv_buf_ptr = 0;
     ctx->flags = 0;
     ctx->state = DOSE_STATE_INIT;
+    crb_init(&ctx->rb, ctx->recv_buf, sizeof(ctx->recv_buf));
     irq_restore(irq_state);
 
     state(ctx, DOSE_SIGNAL_INIT);
@@ -688,8 +752,6 @@ static const netdev_driver_t netdev_driver_dose = {
 
 void dose_setup(dose_t *ctx, const dose_params_t *params, uint8_t index)
 {
-    static const xtimer_ticks32_t min_timeout = {.ticks32 = XTIMER_BACKOFF};
-
     ctx->netdev.driver = &netdev_driver_dose;
 
     mutex_init(&ctx->state_mtx);
@@ -710,17 +772,21 @@ void dose_setup(dose_t *ctx, const dose_params_t *params, uint8_t index)
           );
 
     /* The timeout base is the minimal timeout base used for this driver.
-     * We have to ensure it is above the XTIMER_BACKOFF. Otherwise state
-     * transitions are triggered from another state transition setting up the
-     * timeout.
      * To calculate how long it takes to transfer one byte we assume
      * 8 data bits + 1 start bit + 1 stop bit per byte.
      */
     ctx->timeout_base = CONFIG_DOSE_TIMEOUT_BYTES * 10UL * US_PER_SEC / params->baudrate;
-    if (ctx->timeout_base < xtimer_usec_from_ticks(min_timeout)) {
-        ctx->timeout_base = xtimer_usec_from_ticks(min_timeout);
-    }
     DEBUG("dose timeout set to %" PRIu32 " µs\n", ctx->timeout_base);
-    ctx->timeout.callback = _isr_xtimer;
+    ctx->timeout.callback = _isr_ztimer;
     ctx->timeout.arg = ctx;
+
+#ifdef MODULE_DOSE_WATCHDOG
+    if (index >= _dose_numof) {
+        _dose_numof = index + 1;
+    }
+    if (index == 0) {
+        _dose_base = ctx;
+        _watchdog_init(ctx->timeout_base * 2);
+    }
+#endif /* MODULE_DOSE_WATCHDOG */
 }

drivers/ft5x06/Kconfig

@@ -13,97 +13,12 @@ config MODULE_FT5X06
     select MODULE_PERIPH_I2C
     select MODULE_ZTIMER
     select MODULE_ZTIMER_MSEC
-
-config MODULE_FT5606
-    bool "FT5606 touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT5X16
-    bool "FT5X16 touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT6X06
-    bool "FT6X06 touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT6X36
-    bool "FT6X36 touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT5X06I
-    bool "FT5X06I touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT5336
-    bool "FT5336 touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT3316
-    bool "FT3316 touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT5436I
-    bool "FT5436I touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT5336I
-    bool "FT5336I touch panel driver"
-    select MODULE_FT5X06
-
-config MODULE_FT5X46
-    bool "FT5X46 touch panel driver"
-    select MODULE_FT5X06
-
-config HAVE_FT5606
-    bool
-    select MODULE_FT5606 if MODULE_TOUCH_DEV
     help
-      Indicates that an FT5606 touch panel is present.
+      This driver is compatible with the following controllers: ft5x06, ft5606, ft5x16, ft6x06,
+      ft6x36, ft5x06i, ft5336, ft3316, ft5436i, ft5336i and ft5x46.
 
-config HAVE_FT5X16
+config HAVE_FT5X06
     bool
-    select MODULE_FT5X16 if MODULE_TOUCH_DEV
+    select MODULE_FT5X06 if MODULE_TOUCH_DEV
     help
-      Indicates that an FT5X16 touch panel is present.
-
-config HAVE_FT6X06
-    bool
-    select MODULE_FT6X06 if MODULE_TOUCH_DEV
-    help
-      Indicates that an FT6X06 touch panel is present.
-
-config HAVE_FT6X36
-    bool
-    select MODULE_FT6X36 if MODULE_TOUCH_DEV
-    help
-      Indicates that an FT6X36 touch panel is present.
-
-config HAVE_FT5X06I
-    bool
-    select MODULE_FT5X06I if MODULE_TOUCH_DEV
-    help
-      Indicates that an FT5X06I touch panel is present.
-
-config HAVE_FT5336
-    bool
-    select MODULE_FT5336 if MODULE_TOUCH_DEV
-    help
-      Indicates that an FT5336 touch panel is present.
-
-config HAVE_FT3316
-    bool
-    select MODULE_FT3316 if MODULE_TOUCH_DEV
-    help
-      Indicates that an FT3316 touch panel is present.
-
-config HAVE_FT5436I
-    bool
-    select MODULE_FT5436I if MODULE_TOUCH_DEV
-    help
-      Indicates that an FT5436I touch panel is present.
-
-config HAVE_FT5X46
-    bool
-    select MODULE_FT5X46 if MODULE_TOUCH_DEV
-    help
-      Indicates that an FT5X46 touch panel is present.
+      Indicates that an FT5X06 touch panel is present.

drivers/ft5x06/Makefile.include

@@ -1,13 +1,2 @@
 USEMODULE_INCLUDES_ft5x06 := $(LAST_MAKEFILEDIR)/include
 USEMODULE_INCLUDES += $(USEMODULE_INCLUDES_ft5x06)
-
-PSEUDOMODULES += ft5606
-PSEUDOMODULES += ft5x16
-PSEUDOMODULES += ft6x06
-PSEUDOMODULES += ft6x36
-PSEUDOMODULES += ft5x06i
-PSEUDOMODULES += ft5336
-PSEUDOMODULES += ft3316
-PSEUDOMODULES += ft5436i
-PSEUDOMODULES += ft5336i
-PSEUDOMODULES += ft5x46

drivers/ft5x06/ft5x06.c

@@ -27,6 +27,7 @@
 #include "ztimer.h"
 
 #include "ft5x06.h"
+#include "ft5x06_internal.h"
 #include "ft5x06_constants.h"
 #include "ft5x06_params.h"
 
@@ -53,15 +54,24 @@ int ft5x06_init(ft5x06_t *dev, const ft5x06_params_t *params, ft5x06_event_cb_t
         return -EPROTO;
     }
 
-    if (vendor_id != FT5X06_VENDOR_ID) {
+    uint8_t expected_id;
+    if (dev->params.type == FT5X06_TYPE_FT6X06 || dev->params.type == FT5X06_TYPE_FT6X36) {
+        expected_id = FT6XX6_VENDOR_ID;
+    }
+    else {
+        expected_id = FT5X06_VENDOR_ID;
+    }
+
+    if (expected_id != vendor_id) {
         DEBUG("[ft5x06] init: invalid vendor ID: '0x%02x' (expected: 0x%02x)\n",
-                vendor_id, FT5X06_VENDOR_ID);
+                vendor_id, expected_id);
         i2c_release(FT5X06_BUS);
         return -ENODEV;
     }
 
     /* Auto-calibrate if needed */
-    if (IS_ACTIVE(FT5X06_AUTO_CALIB_NEEDED)) {
+    if (dev->params.type == FT5X06_TYPE_FT5606|| dev->params.type == FT5X06_TYPE_FT5X16 ||
+        dev->params.type == FT5X06_TYPE_FT5X06I) {
         DEBUG("[ft5x06] init: enable device auto-calibration\n");
         i2c_write_reg(FT5X06_BUS, FT5X06_ADDR, FT5X06_G_AUTO_CLB_MODE_REG, 0, 0);
     }
@@ -81,11 +91,9 @@ int ft5x06_init(ft5x06_t *dev, const ft5x06_params_t *params, ft5x06_event_cb_t
 static const uint8_t touch_reg_map[FT5X06_TOUCHES_COUNT_MAX] = {
     FT5X06_TOUCH1_XH_REG,
     FT5X06_TOUCH2_XH_REG,
-#if FT5X06_TOUCHES_COUNT_MAX > 2
     FT5X06_TOUCH3_XH_REG,
     FT5X06_TOUCH4_XH_REG,
     FT5X06_TOUCH5_XH_REG,
-#endif
 };
 
 int ft5x06_read_touch_positions(const ft5x06_t *dev, ft5x06_touch_position_t *positions, size_t len)
@@ -113,7 +121,7 @@ int ft5x06_read_touch_count(const ft5x06_t *dev, uint8_t *count)
     i2c_release(FT5X06_BUS);
     *count &= FT5X06_TD_STATUS_MASK;
 
-    if (*count > FT5X06_TOUCHES_COUNT_MAX) {
+    if (*count > ft5x06_get_touches_count_max(dev)) {
         *count = 0;
     }
 

drivers/ft5x06/ft5x06_internal.c

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2022 HAW Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @{
+ * @file
+ * @brief       Implementation of internal functions for ft5x06
+ *
+ * @author      Leandro Lanzieri <leandro.lanzieri@haw-hamburg.de>
+ * @}
+ */
+#include <inttypes.h>
+
+#include "ft5x06.h"
+#include "ft5x06_internal.h"
+
+uint8_t ft5x06_get_touches_count_max(const ft5x06_t *dev) {
+    if (dev->params.type == FT5X06_TYPE_FT6X06 || dev->params.type == FT5X06_TYPE_FT6X36) {
+        return FT6XX6_TOUCHES_COUNT_MAX;
+    }
+    else {
+        return FT5X06_TOUCHES_COUNT_MAX;
+    }
+}