Faulty response in LPTIM application example

[suyodhana]

Hi ,

I am trying to get quick start STM32WB55 Nucleo Board using low power application example. I tried to execute LPTIM example from Examples_LL folder (P-NUCLEO-WB55.Nucleo) in STM32Cube_FW_WB_V1.2.0. I followed the read me file to get the expected output as LED2 to toggle. But that is not happening. I observe no toggle of LED2 on the board. May i know the setup required in order to make LPTIM application to work. Do we need to include CMOS battery on to the board. I tried to debugg the session, but as soon as the controller enters in to stop mode, debug session is getting closed. May i know the reason for this. Does debug session will work when controller is in STOP mode.

Thanks,

Suyodhana

[Le Corre Pierre]

Hello @suyodhana​ ,

You did not mention any waveform generator in your setup.

As indicated inside the readme.txt of LPTIM/LPTIM_PulseCounter of STM32Cube_FW_WB_V1.2.0, you need to connect a waveform generator in this setup.

@par Hardware and Software environment
 
 - This example runs on STM32WB55xx devices.
 
 - This example has been tested with P-NUCLEO-WB55 board and can be
 easily tailored to any other supported device and development board.
 
 - Connect a square waveform generator to PC.00 (Arduino connector CN8 pin A0, Morpho connector CN7 pin 28).
 If the frequency of the signal is 1 kHz, LED2 toggles every second.

BR.

Pierre.