i2c.c

/*
 * I2C support.
 *
 * Copyright (C) 2016, 2017 OurAirQuality.org
 *
 * Licensed under the Apache License, Version 2.0, January 2004 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *      http://www.apache.org/licenses/
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS WITH THE SOFTWARE.
 *
 */

#include <stdint.h>
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <esp/uart.h>
#include <stdio.h>
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
#include "i2c/i2c.h"
#include "i2c.h"
#include "config.h"

/* To synchronize access to the I2C interface. */
SemaphoreHandle_t i2c_sem;

void init_i2c()
{
    i2c_init(I2C_BUS, param_i2c_scl, param_i2c_sda, I2C_FREQ_100K);
    i2c_sem = xSemaphoreCreateMutex();
}