mirror of
https://github.com/RIOT-OS/RIOT.git
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159 lines
4.2 KiB
C
159 lines
4.2 KiB
C
/*
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* Copyright (C) 2025 David Picard
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup boards_seeedstudio-xiao-esp32c3
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* @brief Peripheral configurations for the Seeed Studio ESP32-C3 Xiao board
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* @{
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*
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* For detailed information about the peripheral configuration for ESP32-C3
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* boards, see section \ref esp32_peripherals "Common Peripherals".
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*
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* To specify the board, add the following to the make command line:
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* BOARD=seeedstudio-xiao-esp32c3 make ...
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* @note
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* Most definitions can be overridden by an \ref esp32_application_specific_configurations
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* "application-specific board configuration" if necessary.
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*
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* @file
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* @author David Picard
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*/
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#ifndef PERIPH_CONF_H
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#define PERIPH_CONF_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @name ADC channel configuration
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* @{
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*/
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/**
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* @brief Declaration of GPIOs that can be used as ADC channels
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*
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* On this board, only three pins can be used as ADC channels.
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* Note that GPIO5 is linked to ADC2, which _"does not work properly"_,
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* and therefore can't be used as an ADC channel.
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*
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* @note As long as the GPIOs listed in ADC_GPIOS are not initialized as ADC
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* channels with the `adc_init` function, they can be used for other
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* purposes.
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*/
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#ifndef ADC_GPIOS
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#define ADC_GPIOS { GPIO2, GPIO3, GPIO4 }
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#endif
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/** @} */
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/**
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* @name I2C configuration
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*
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* The ESP32C3 has one I2C interface I2C_DEV(0).
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*
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* The GPIOs listed in the configuration are only initialized as I2C signals
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* when module `periph_i2c` is used. Otherwise they are not allocated and
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* can be used for other purposes.
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*
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* @{
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*/
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#ifndef I2C0_SPEED
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#define I2C0_SPEED I2C_SPEED_FAST /**< I2C bus speed of I2C_DEV(0) */
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#endif
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#ifndef I2C0_SCL
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#define I2C0_SCL GPIO7 /**< SCL signal of I2C_DEV(0) */
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#endif
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#ifndef I2C0_SDA
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#define I2C0_SDA GPIO6 /**< SDA signal of I2C_DEV(0) */
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#endif
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/** @} */
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/**
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* @name PWM channel configuration
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*
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* The ESP32C3 has one LED PWM device.
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* Pins that are not defined as I2C, SPI or UART are listed
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* as PWM channels.
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* Generally, all outputs pins could be used as PWM channels.
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*
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* @note As long as the according PWM device is not initialized with
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* the `pwm_init`, the GPIOs declared for this device can be used
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* for other purposes.
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*
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* @{
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*/
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/**
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* @brief Declaration of the channels for device PWM_DEV(0),
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* at maximum PWM_CHANNEL_NUM_DEV_MAX.
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*/
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#ifndef PWM0_GPIOS
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#define PWM0_GPIOS { GPIO2, GPIO3, GPIO4, GPIO5 }
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#endif
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/** @} */
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/**
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* @name SPI configuration
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*
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* @note
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* The GPIOs listed in the configuration are not initialized as SPI
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* signals until the corresponding SPI interface is used for the first time
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* by either calling the `spi_init_cs` function or the `spi_acquire`
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* function. That is, they are not allocated as SPI signals before and can
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* be used for other purposes as long as the SPI interface is not used.
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*
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* @{
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*/
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#ifndef SPI0_CTRL
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#define SPI0_CTRL FSPI /**< FSPI is used as SPI_DEV(0) */
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#endif
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#ifndef SPI0_SCK
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#define SPI0_SCK GPIO8 /**< FSPI SCK signal routed to GPIO8 in GPIO matrix */
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#endif
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#ifndef SPI0_MISO
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#define SPI0_MISO GPIO9 /**< FSPI SCK signal routed to GPIO9 in GPIO matrix */
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#endif
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#ifndef SPI0_MOSI
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#define SPI0_MOSI GPIO10 /**< FSPI SCK signal routed to GPIO10 in GPIO matrix */
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#endif
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#ifndef SPI0_CS0
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#define SPI0_CS0 GPIO5 /**< CS pin controlled in software */
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#endif
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/** @} */
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/**
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* @name UART configuration
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*
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* ESP32-C3 provides 2 UART interfaces at maximum:
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*
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* UART_DEV(0) uses fixed standard configuration.<br>
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* UART_DEV(1) is not used.<br>
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*
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* @{
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*/
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#define UART0_TXD GPIO21 /**< direct I/O pin for UART_DEV(0) TxD, can't be changed */
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#define UART0_RXD GPIO20 /**< direct I/O pin for UART_DEV(0) RxD, can't be changed */
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/** @} */
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#ifdef __cplusplus
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} /* end extern "C" */
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#endif
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/* include common peripheral definitions as last step */
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#include "periph_conf_common.h"
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#endif /* PERIPH_CONF_H */
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/** @} */
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