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tests/periph_i2c: add tests for periph_i2c_reconfigure features

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Add a test to re-configure the I2C pins to GPIO functionality and
use them as output.

A small delay is added to allow for observing the change in power
draw.
This commit is contained in:
Benjamin Valentin 2020-02-20 13:34:37 +01:00 committed by Benjamin Valentin
parent 8c502322f4
commit 896f9db71f
2 changed files with 49 additions and 0 deletions
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2
tests/periph_i2c/Makefile
View File

@ -2,7 +2,9 @@ BOARD ?= samr21-xpro
include ../Makefile.tests_common include ../Makefile.tests_common
FEATURES_REQUIRED = periph_i2c FEATURES_REQUIRED = periph_i2c
FEATURES_OPTIONAL = periph_i2c_reconfigure
USEMODULE += shell USEMODULE += shell
USEMODULE += xtimer
include $(RIOTBASE)/Makefile.include include $(RIOTBASE)/Makefile.include

47
tests/periph_i2c/main.c
View File

@ -24,9 +24,12 @@
#include <errno.h> #include <errno.h>
#include "periph_conf.h" #include "periph_conf.h"
#include "periph/gpio.h"
#include "periph/i2c.h" #include "periph/i2c.h"
#include "shell.h" #include "shell.h"
#include <xtimer.h>
#ifndef I2C_ACK #ifndef I2C_ACK
#define I2C_ACK (0) #define I2C_ACK (0)
#endif #endif
@ -160,6 +163,47 @@ int cmd_i2c_release(int argc, char **argv)
return 0; return 0;
} }
#ifdef MODULE_PERIPH_I2C_RECONFIGURE
int cmd_i2c_gpio(int argc, char **argv)
{
int dev;
dev = _check_param(argc, argv, 1, 1, "DEV");
if (dev == ARG_ERROR) {
return 1;
}
gpio_t sda_pin = i2c_pin_sda(dev);
gpio_t scl_pin = i2c_pin_scl(dev);
printf("Command: i2c_deinit_pins(%i)\n", dev);
i2c_deinit_pins(dev);
gpio_init(sda_pin, GPIO_OUT);
gpio_init(scl_pin, GPIO_OUT);
xtimer_sleep(1);
printf("Command: gpio_set()\n");
gpio_set(sda_pin);
gpio_set(scl_pin);
xtimer_sleep(1);
printf("Command: gpio_clear()\n");
gpio_clear(sda_pin);
gpio_clear(scl_pin);
xtimer_sleep(1);
printf("Command: i2c_init_pins(%i)\n", dev);
i2c_init_pins(dev);
printf("Success: i2c_%i re-init\n", dev);
return 0;
}
#endif
int cmd_i2c_read_reg(int argc, char **argv) int cmd_i2c_read_reg(int argc, char **argv)
{ {
int res; int res;
@ -444,6 +488,9 @@ int cmd_i2c_get_id(int argc, char **argv)
static const shell_command_t shell_commands[] = { static const shell_command_t shell_commands[] = {
{ "i2c_acquire", "Get access to the I2C bus", cmd_i2c_acquire }, { "i2c_acquire", "Get access to the I2C bus", cmd_i2c_acquire },
{ "i2c_release", "Release to the I2C bus", cmd_i2c_release }, { "i2c_release", "Release to the I2C bus", cmd_i2c_release },
#ifdef MODULE_PERIPH_I2C_RECONFIGURE
{ "i2c_gpio", "Re-configures I2C pins to GPIO mode and back.", cmd_i2c_gpio },
#endif
{ "i2c_read_reg", "Read byte from register", cmd_i2c_read_reg }, { "i2c_read_reg", "Read byte from register", cmd_i2c_read_reg },
{ "i2c_read_regs", "Read bytes from registers", cmd_i2c_read_regs }, { "i2c_read_regs", "Read bytes from registers", cmd_i2c_read_regs },
{ "i2c_read_byte", "Read byte from the I2C device", cmd_i2c_read_byte }, { "i2c_read_byte", "Read byte from the I2C device", cmd_i2c_read_byte },