esp32-s3-wroom-1-i2c-ejemplo-base.c

#include <stdio.h>
#include <stdbool.h>
#include <unistd.h>
#include <stdbool.h>
#include <unistd.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "sdkconfig.h"
#include "driver/i2c.h"
static const char *TAG = "i2c-simple-example";


#define I2C_MASTER_SCL_IO           GPIO_NUM_9      /*!< GPIO number used for I2C master clock */
#define I2C_MASTER_SDA_IO           GPIO_NUM_8      /*!< GPIO number used for I2C master data  */
#define I2C_MASTER_NUM              0                          /*!< I2C master i2c port number, the number of i2c peripheral interfaces available will depend on the chip */
#define I2C_MASTER_FREQ_HZ          100000                     /*!< I2C master clock frequency */
#define I2C_MASTER_TX_BUF_DISABLE   0                          /*!< I2C master doesn't need buffer */
#define I2C_MASTER_RX_BUF_DISABLE   0                          /*!< I2C master doesn't need buffer */
#define I2C_MASTER_TIMEOUT_MS       1000
#define DIRECCION_ESCLAVO 0x68

static esp_err_t i2c_master_init(void)
{
    int i2c_master_port = I2C_MASTER_NUM;

    i2c_config_t conf = {
        .mode = I2C_MODE_MASTER,
        .sda_io_num = I2C_MASTER_SDA_IO,
        .scl_io_num = I2C_MASTER_SCL_IO,
        .sda_pullup_en = GPIO_PULLUP_ENABLE,
        .scl_pullup_en = GPIO_PULLUP_ENABLE,
        .master.clk_speed = I2C_MASTER_FREQ_HZ,
    };

    i2c_param_config(i2c_master_port, &conf);

    return i2c_driver_install(i2c_master_port, conf.mode, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
}

static esp_err_t leer_byte(uint8_t slv_address, uint8_t reg_addr, uint8_t *data, size_t len)
{
    return i2c_master_write_read_device(I2C_MASTER_NUM, slv_address, &reg_addr, 1, data, len, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
}

static esp_err_t escribir_byte(uint8_t slv_address, uint8_t reg_addr, uint8_t data)
{
    int ret;
    uint8_t write_buf[2] = {reg_addr, data};
    ret = i2c_master_write_to_device(I2C_MASTER_NUM, slv_address, write_buf, sizeof(write_buf), I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);

    return ret;
}

void programa1(void * pvParameters){
  
	for(;;){
    
 
 
		
 
	}
}
 
void programa2(void * pvParameters){
	for(;;){
 
	}
}
 
 
 
void app_main(void){
  
    ESP_ERROR_CHECK(i2c_master_init());
    ESP_LOGI(TAG, "I2C initialized successfully");
    uint8_t data[2];

      /* Read the MPU9250 WHO_AM_I register, on power up the register should have the value 0x71 */
      for(;;){
   ESP_ERROR_CHECK(leer_byte(0x68, 0x00, data, 1));
    ESP_LOGI(TAG, "Segundos = %X", data[0]);
        sleep(1);
      }
 
	//xTaskCreate(programa1, "Programa1", 4048, NULL, tskIDLE_PRIORITY, NULL);
	//xTaskCreate(programa2, "Programa2", 4048, NULL, tskIDLE_PRIORITY, NULL);
 
 
}