I’m trying to read ADC count by I2C based ADC121C021 module with help of ESP32 IDF by FREE_RTOS but I’m only getting ESP_FAIL sending reading function so you can help me
actually, I’m not able to get ACK from the ESP side. only received this msg
ADS-I2C: ESP_FAIL: No ack, sensor not connected…skip…
static esp_err_t read_ADS(i2c_port_t i2c_num, uint8_t *data_h, uint8_t *data_l){
int ret;
ESP_LOGE(TAG, "read ADC ");
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, ADS_ADDRESS | WRITE_FLAG, 0x01);
i2c_master_write_byte(cmd, 0x02, 0x01);
i2c_master_write_byte(cmd, 0x20, 0x00);
i2c_master_stop(cmd);
ret = i2c_master_cmd_begin(i2c_num, cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
if (ret != ESP_OK) {
return ret;
}
ESP_LOGE(TAG, "out here");
vTaskDelay(400 / portTICK_RATE_MS);
cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, ADS_ADDRESS | WRITE_FLAG, 0x01);
i2c_master_write_byte(cmd, CONV_REGISTER, 0x01);
i2c_master_start(cmd);
i2c_master_write_byte(cmd, ADS_ADDRESS | READ_FLAG, 0x01);
i2c_master_read_byte(cmd, data_h, ACK_FLAG);
i2c_master_read_byte(cmd, data_l, NACK_FLAG);
i2c_master_stop(cmd);
ret = i2c_master_cmd_begin(i2c_num, cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
return ret;
}