RIOT/drivers/saul/init_devs/auto_init_dht.c

/*
 * Copyright (C) 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
 * directory for more details.
 *
 */

/*
 * @ingroup     sys_auto_init_saul
 * @{
 *
 * @file
 * @brief       Auto initialization for DHT temperature/humidity sensors
 *
 * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
 *
 * @}
 */

#include "assert.h"
#include "log.h"
#include "saul_reg.h"
#include "dht_params.h"
#include "dht.h"

/**
 * @brief   Define the number of configured sensors
 */
#define DHT_NUM     ARRAY_SIZE(dht_params)

/**
 * @brief   Allocate memory for the device descriptors
 */
static dht_t dht_devs[DHT_NUM];

/**
 * @brief   Memory for the SAUL registry entries
 */
static saul_reg_t saul_entries[DHT_NUM * 2];

/**
 * @brief   Define the number of saul info
 */
#define DHT_INFO_NUM ARRAY_SIZE(dht_saul_info)

/**
 * @name    Import SAUL endpoints
 * @{
 */
extern const saul_driver_t dht_temp_saul_driver;
extern const saul_driver_t dht_hum_saul_driver;
/** @} */

void auto_init_dht(void)
{
    assert(DHT_INFO_NUM == DHT_NUM);

    for (unsigned int i = 0; i < DHT_NUM; i++) {
        LOG_DEBUG("[auto_init_saul] initializing dht #%u\n", i);

        if (dht_init(&dht_devs[i], &dht_params[i]) != DHT_OK) {
            LOG_ERROR("[auto_init_saul] error initializing dht #%u\n", i);
            continue;
        }

        saul_entries[(i * 2)].dev = &(dht_devs[i]);
        saul_entries[(i * 2)].name = dht_saul_info[i].name;
        saul_entries[(i * 2)].driver = &dht_temp_saul_driver;
        saul_entries[(i * 2) + 1].dev = &(dht_devs[i]);
        saul_entries[(i * 2) + 1].name = dht_saul_info[i].name;
        saul_entries[(i * 2) + 1].driver = &dht_hum_saul_driver;
        saul_reg_add(&(saul_entries[(i * 2)]));
        saul_reg_add(&(saul_entries[(i * 2) + 1]));
    }
}