how to wake up from system off without reseting a variable

RE: how to wake up from system off without reseting a variable

Asbjørn — Thu, 06 Nov 2014 14:45:25 GMT

Make sure you write to the sd_power_ramon_set() after you have initialized the softdevice. I just tested this by a very simple if in between conn_params_init() and advertising_start() in the ble_app_hrs example.

It returned success and the value of RAMON was set to 0x00030003.

if(sd_power_ramon_set(0x00030003) == NRF_SUCCESS)
		{
		__nop();
		}

RE: how to wake up from system off without reseting a variable

Tarik — Thu, 06 Nov 2014 12:05:02 GMT

I just discovered sd_power_ramon_set() doesn't return NRF_SUCCESS, what can be the cause ? Thank you

RE: how to wake up from system off without reseting a variable

Asbjørn — Thu, 06 Nov 2014 11:21:16 GMT

sd_power_ramon_set() should keep the RAM valid as long as you get a NRF_SUCCESS back from it. How do you detect that it's not retained? What do you use to wake the chip up from SYSTEMOFF?