MPU9250 READ ID FAILED

[jaychou]

Here is my situation:when I run the project "i2c_mpu9250",it worked. But when I applied it to "Ble_app_uart",in which I wanted to trans datas from nRF to Iphone, it failed.I checked several times and found that it cannot read mpu ID, I meant "id = 0".BUUT,in the project"i2c_mpu9250,the ID was correct. Please Helppppp!!!

[jaychou]

	  do
	  {
		    nrf_drv_mpu_read_registers(MPU9250_REG_WHO_AM_I,&id,1);
			  if(id != MPU9250_WHO_AM_I_VALUE)
				{
					  printf("ID:  %d\r\n",id);
			      printf("mpu9250 init err...\r\n");
			      nrf_delay_ms(500);
				}
		}while(id != MPU9250_WHO_AM_I_VALUE);

 

[Kazi Afroza Sultana]

Hello,

I think there may be conflict in pin assignment when two examples ( i2c_mpu9250 and ble_app_uart) work together. Could you please share what are the pins used for i2C?

Thanks.

Best Regards,

Kazi Afroza Sultana

[jaychou]

Thanks, actually, the two examples are the same, my nRF52840 used pin(0,29) for SCL and pin(0,28) for SDA.

[Kazi Afroza Sultana]

Hello,

 Can you send me the whole project so that I can check it from here ? In addition what do you mean by saying ''two examples are the same''? 

Thanks.

Best Regards,

Kazi Afroza Sultana