Reading ADC121C021 by FreeRTOS

Question

I'm trying to read ADC count by I2C based ADC121C021 (here) module with help of this code but Im only getting ESP_FAIL

 static esp_err_t read_ADS(i2c_port_t i2c_num, uint8_t *data_h, uint8_t *data_l){
   int ret;
   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, 0x00, 0x00); 
   i2c_master_stop(cmd);
   ret = i2c_master_cmd_begin(i2c_num, cmd, 1000 / portTICK_RATE_MS);    // (here fun return)
   i2c_cmd_link_delete(cmd);
   if (ret != ESP_OK) {
     return ret;
   }
   vTaskDelay(400 / portTICK_RATE_MS);
   cmd = i2c_cmd_link_create();
   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;
 }

let me know if I'm doing something wrong. One more point I tried the Arduino based example where if I used the salve Address 0x50 its not working but If I used 0x58 its working totally fine for me Jumpers are open (for Pull_up and Address)

Reading ADC121C021 by FreeRTOS

0 Answers0