Can't get ADC to work in HeartRate example on STM32WB15 when CFG_LPM_SUPPORTED is set to 1.

[HKowa.1]

I've modified basic HeartRate project to run an ADC inside of the task. However this results in adc always returning 0. Sometimes whole application hangs. However when CFG_LPM_SUPPORTED is set to 0. Everything works fine. I've already created github issiue and suposedly HAL is to blame. Any input would be helpfull.

[HKowa.1]

https://github.com/STMicroelectronics/STM32CubeWB/issues/77

[A.RIOTTE]

Hello @HKowa.1

It looks like the HSI clock is not enabled when the application is waking-up up from stop mode. 

To confirm, you can either enable the HSI clock in your HAL_ADC_MspInit function (using __HAL_RCC_HSI_ENABLE())

or you can try to use another clock source for the ADC (PeriphClkInitStruct.AdcClockSelection= RCC_ADCCLKSOURCE_SYSCLK;)

Best regards