Nicla Sense - BHI260 - physical sensor IDs for self test

[sebp]

Hello,

I am calling the function bhy2_perform_self_test() of the C API using the virtual  sensor IDs of the Accelerometer, Gyrosscope and Magnetometer. The call  succeeds, but the test result returns test_status=9. It seems one has to use the BSX physical sensor IDs?

I found this: https://github.com/BoschSensortec/BSX4-HAL-4.1NoFusion/blob/master/sensord/bsx/inc/bsx_physical_sens...

With these IDs the self test succeed. Are these the correct IDs to use?

[BSTRobin · Accepted solution]

Hi sebp,

As you call the function bhy2_perform_self_test() to do self test, sensor ID should use BSX input physical sensor ID, not use virtual sensor ID.

Yes, you could use them.

[kise1_off]

Hi!

Can you share an example of a self-test code?

It will be very helpful! Thanks!

[sebp]

I am using the Arduino IDE. Because the Arduino_BHY2 lib does not expose all functionality of the bhy2 C API and also does not give access to the bhy2_dev structure, you have to add the following code to the BoschSensortec class in BoschSensortec.h:

public:
bhy2_dev& dev() {return _bhy2;}; 

In the setup() function of the Arduino sketch I do this:

void setup()
{

...
	
	struct bhy2_self_test_resp accel_result;
	int err = bhy2_perform_self_test(BSX_PHYS_SENS_ID_ACCEL, &accel_result, &sensortec.dev());
	if (err != BHY2_OK) {		
		goto Error;			
	}
	if (accel_result.test_status != 0) {		
		goto Error;
	}


...


	set_LED_color(0xff,0xff,0); // yellow	
	return;
	
Error:
	set_LED_color(0xff,0,0);	
}

"sensortec" is a global variable defined by the Arduino_BHY2 lib.