nrf52832+FreeRtos+ble_app_hrs_freertos lowpower

RE: nrf52832+FreeRtos+ble_app_hrs_freertos lowpower

Hung Bui — Mon, 13 Dec 2021 15:54:11 GMT

Hi,
Have you tested with other example and can measure low current consumption (down to uA) ?

How did you measure current consumption ?

Please test with ble_app_pwr_profiling for example.

If you put a breakpoint at sd_app_evt_wait() call inside vPortSuppressTicksAndSleep() do you see it hit ?

RE: nrf52832+FreeRtos+ble_app_hrs_freertos lowpower

edicui — Mon, 13 Dec 2021 15:15:38 GMT

Hi,

I didn't change other code of ble_app_hrs_freertos，I'm sure the configUSE_TICKLESS_IDLE was set to 1,but current consumption still keep 3.5mA .

RE: nrf52832+FreeRtos+ble_app_hrs_freertos lowpower

Hung Bui — Mon, 13 Dec 2021 14:55:08 GMT

Hi,

Have you made sure configUSE_TICKLESS_IDLE is set to 1 ?
The CPU is put to sleep inside vPortSuppressTicksAndSleep() via sd_app_evt_wait() call.
I did a quick test of the stock ble_app_hrs_freertos and can see the current consumption is around 150uA.
Please make sure the device is not in debug mode when you measure the current consumption (do a power reset after you flash)