esp_idf_touch/main/i2c_driver.cpp

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#include <cstring>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "sdkconfig.h"
#include "i2c_driver.h"
 
static const char *TAG = "I2C";
 
#define I2C_MASTER_NUM                  (i2c_port_t)CONFIG_I2C_MASTER_PORT_NUM
#define I2C_MASTER_SDA_IO               (gpio_num_t)CONFIG_SENSOR_SDA
#define I2C_MASTER_SCL_IO               (gpio_num_t)CONFIG_SENSOR_SCL
#define I2C_MASTER_FREQ_HZ              CONFIG_I2C_MASTER_FREQUENCY 
#define I2C_MASTER_TX_BUF_DISABLE       0                           
#define I2C_MASTER_RX_BUF_DISABLE       0                           
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5,0,0)) && defined(CONFIG_SENSORLIB_ESP_IDF_NEW_API)
#include "soc/clk_tree_defs.h"
 
i2c_master_dev_handle_t  i2c_device;
 
// * Using the new API of esp-idf 5.x, you need to pass the I2C BUS handle,
// * which is useful when the bus shares multiple devices.
i2c_master_bus_handle_t bus_handle;
#endif
 
 
#if CONFIG_I2C_COMMUNICATION_METHOD_CALLBACK_RW
 
int i2c_read_callback(uint8_t devAddr, uint8_t regAddr, uint8_t *data, uint8_t len)
{
    esp_err_t ret;
    if (len == 0) {
        return ESP_OK;
    }
    if (data == NULL) {
        return ESP_FAIL;
    }
 
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5,0,0)) && defined(CONFIG_SENSORLIB_ESP_IDF_NEW_API)
 
    ret = i2c_master_transmit_receive(
              i2c_device,
              (const uint8_t *)&regAddr,
              1,
              data,
              len,
              -1);
#else
 
    i2c_cmd_handle_t cmd;
 
    cmd = i2c_cmd_link_create();
    i2c_master_start(cmd);
    i2c_master_write_byte(cmd, (devAddr << 1) | I2C_MASTER_WRITE, true);
    i2c_master_write_byte(cmd, regAddr, true);
    i2c_master_stop(cmd);
    ret =  i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, pdTICKS_TO_MS(1000));
    i2c_cmd_link_delete(cmd);
    if (ret != ESP_OK) {
        ESP_LOGE(TAG, "PMU i2c_master_cmd_begin FAILED! > ");
        return ESP_FAIL;
    }
    cmd = i2c_cmd_link_create();
    i2c_master_start(cmd);
    i2c_master_write_byte(cmd, (devAddr << 1) | I2C_MASTER_READ, true);
    if (len > 1) {
        i2c_master_read(cmd, data, len - 1, I2C_MASTER_ACK);
    }
    i2c_master_read_byte(cmd, &data[len - 1], I2C_MASTER_NACK);
    i2c_master_stop(cmd);
    ret = i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, pdTICKS_TO_MS(1000));
    i2c_cmd_link_delete(cmd);
    if (ret != ESP_OK) {
        ESP_LOGE(TAG, "i2c_read_error.");
    }
#endif
    return ret == ESP_OK ? 0 : -1;
}
 
int i2c_write_callback(uint8_t devAddr, uint8_t regAddr, uint8_t *data, uint8_t len)
{
    esp_err_t ret;
    if (data == NULL) {
        return ESP_FAIL;
    }
 
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5,0,0)) && defined(CONFIG_SENSORLIB_ESP_IDF_NEW_API)
    uint8_t *write_buffer = (uint8_t *)malloc(sizeof(uint8_t) * (len + 1));
    if (!write_buffer) {
        return -1;
    }
    write_buffer[0] = regAddr;
    memcpy(write_buffer + 1, data, len);
 
    ret = i2c_master_transmit(
              i2c_device,
              write_buffer,
              len + 1,
              -1);
    free(write_buffer);
#else
    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
    i2c_master_start(cmd);
    i2c_master_write_byte(cmd, (devAddr << 1) |  I2C_MASTER_WRITE, true);
    i2c_master_write_byte(cmd, regAddr, true);
    i2c_master_write(cmd, data, len, true);
    i2c_master_stop(cmd);
    ret = i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, pdTICKS_TO_MS(1000));
    i2c_cmd_link_delete(cmd);
    if (ret != ESP_OK) {
        ESP_LOGE(TAG, "i2c_write_error.");
    }
#endif
    return ret == ESP_OK ? 0 : -1;
}
 
esp_err_t i2c_drv_device_init(uint8_t address)
{
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5,0,0)) && defined(CONFIG_SENSORLIB_ESP_IDF_NEW_API)
    i2c_device_config_t i2c_dev_conf = {
        .dev_addr_length = I2C_ADDR_BIT_LEN_7,
        .device_address = address,
        .scl_speed_hz = I2C_MASTER_FREQ_HZ,
    };
    return i2c_master_bus_add_device(bus_handle, &i2c_dev_conf, &i2c_device);
#else
    return ESP_OK;
#endif
}
 
#endif //CONFIG_I2C_COMMUNICATION_METHOD_CALLBACK_RW
 
 
esp_err_t i2c_drv_init(void)
{
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5,0,0)) && defined(CONFIG_SENSORLIB_ESP_IDF_NEW_API)
 
    ESP_LOGI(TAG, "Implemented using read and write callback methods (Use higher version >= 5.0 API)");
 
    i2c_master_bus_config_t i2c_bus_config;
    memset(&i2c_bus_config, 0, sizeof(i2c_bus_config));
    i2c_bus_config.clk_source = I2C_CLK_SRC_DEFAULT;
    i2c_bus_config.i2c_port = I2C_MASTER_NUM;
    i2c_bus_config.scl_io_num = (gpio_num_t)I2C_MASTER_SCL_IO;
    i2c_bus_config.sda_io_num = (gpio_num_t)I2C_MASTER_SDA_IO;
    i2c_bus_config.glitch_ignore_cnt = 7;
    i2c_bus_config.flags.enable_internal_pullup = true;
    ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_bus_config, &bus_handle));
 
    return ESP_OK;
#else
 
    ESP_LOGI(TAG, "Implemented using read and write callback methods (Use lower version < 5.0 API)");
 
    i2c_config_t i2c_conf ;
    memset(&i2c_conf, 0, sizeof(i2c_conf));
    i2c_conf.mode = I2C_MODE_MASTER;
    i2c_conf.sda_io_num = I2C_MASTER_SDA_IO;
    i2c_conf.scl_io_num = I2C_MASTER_SCL_IO;
    i2c_conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
    i2c_conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
    i2c_conf.master.clk_speed = I2C_MASTER_FREQ_HZ;
    i2c_param_config(I2C_MASTER_NUM, &i2c_conf);
    return i2c_driver_install(I2C_MASTER_NUM, i2c_conf.mode, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
#endif
}
 
void i2c_drv_scan()
{
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5,0,0)) && defined(CONFIG_SENSORLIB_ESP_IDF_NEW_API)
 
    esp_err_t err = ESP_OK;
    uint8_t address = 0x00;
    printf("Scand I2C Devices:\n");
    printf("     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f\r\n");
    for (int i = 0; i < 128; i += 16) {
        printf("%02x: ", i);
        for (int j = 0; j < 16; j++) {
            fflush(stdout);
            address = i + j;
            err = i2c_master_probe(bus_handle, address, 1000);
            if (err == ESP_OK) {
                printf("%02x ", address);
            } else if (err == ESP_ERR_TIMEOUT) {
                printf("UU ");
            } else {
                printf("-- ");
            }
        }
        printf("\r\n");
    }
    printf("\n\n\n");
#else
    uint8_t address;
    printf("Scand I2C Devices:\n");
    printf("     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f\r\n");
    for (int i = 0; i < 128; i += 16) {
        printf("%02x: ", i);
        for (int j = 0; j < 16; j++) {
            fflush(stdout);
            address = i + j;
            i2c_cmd_handle_t cmd = i2c_cmd_link_create();
            i2c_master_start(cmd);
            i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_WRITE, true);
            i2c_master_stop(cmd);
            esp_err_t ret = i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 50 / portTICK_PERIOD_MS);
            i2c_cmd_link_delete(cmd);
            if (ret == ESP_OK) {
                printf("%02x ", address);
            } else if (ret == ESP_ERR_TIMEOUT) {
                printf("UU ");
            } else {
                printf("-- ");
            }
        }
        printf("\r\n");
    }
#endif
}
 
bool i2c_drv_probe(uint8_t devAddr)
{
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5,0,0)) && defined(CONFIG_SENSORLIB_ESP_IDF_NEW_API)
    return ESP_OK == i2c_master_probe(bus_handle, devAddr, 1000);
#else
    i2c_cmd_handle_t cmd = i2c_cmd_link_create();
    i2c_master_start(cmd);
    i2c_master_write_byte(cmd, (devAddr << 1) | I2C_MASTER_WRITE, true);
    i2c_master_stop(cmd);
    esp_err_t ret = i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 50 / portTICK_PERIOD_MS);
    i2c_cmd_link_delete(cmd);
    return (ret == ESP_OK);
#endif //ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5,0,0)
}