auto_init_gpio.c
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/*
* Copyright (C) 2015 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
* directory for more details.
*
*/
/*
* @ingroup auto_init_saul
* @{
*
* @file
* @brief Auto initialization of GPIO pins directly mapped to SAUL reg
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*
* @}
*/
#ifdef MODULE_SAUL_GPIO
#include "log.h"
#include "saul_reg.h"
#include "saul/periph.h"
#include "gpio_params.h"
#include "periph/gpio.h"
/**
* @brief Define the number of configured sensors
*/
#define SAUL_GPIO_NUMOF (sizeof(saul_gpio_params)/sizeof(saul_gpio_params[0]))
/**
* @brief Memory for the registry entries
*/
static saul_reg_t saul_reg_entries[SAUL_GPIO_NUMOF];
/**
* @brief Reference the input mode driver struct
*/
extern saul_driver_t gpio_in_saul_driver;
/**
* @brief Reference to the output mode driver struct
*/
extern saul_driver_t gpio_out_saul_driver;
void auto_init_gpio(void)
{
for (unsigned int i = 0; i < SAUL_GPIO_NUMOF; i++) {
const saul_gpio_params_t *p = &saul_gpio_params[i];
LOG_DEBUG("[auto_init_saul] initializing GPIO #%u\n", i);
saul_reg_entries[i].dev = (void *)p;
saul_reg_entries[i].name = p->name;
if ((p->mode == GPIO_IN) || (p->mode == GPIO_IN_PD) ||
(p->mode == GPIO_IN_PU)) {
saul_reg_entries[i].driver = &gpio_in_saul_driver;
}
else {
saul_reg_entries[i].driver = &gpio_out_saul_driver;
}
/* initialize the GPIO pin */
gpio_init(p->pin, p->mode);
/* set initial pin state if configured */
if (p->flags & (SAUL_GPIO_INIT_CLEAR | SAUL_GPIO_INIT_SET)) {
phydat_t s;
s.val[0] = (p->flags & SAUL_GPIO_INIT_SET);
saul_reg_entries[i].driver->write(p, &s);
}
/* add to registry */
saul_reg_add(&(saul_reg_entries[i]));
}
}
#else
typedef int dont_be_pedantic;
#endif /* MODULE_SAUL_GPIO */