STM32WB Low power mode issue with Tickless Idle configuration along with FreeRTOS

[Mahendra Sondagar]

Hello geeks...

Hope all are doing well

Recently, I'm dealing with the STM32WB Tickless Idle mode of the FreeRTOS (CMSIS-V2)

I'm intended to achieve the lowest power consumption with STOP1/2 mode

To do so, I'm following the official tutorial for the same, which is mentioned here

https://www.youtube.com/watch?v=B1cUWRpXrPU

Previously, i have tried with the Normal Ticklees sleep mode

With the normal sleep mode, while iterating with the main thread, I'm using 4000 ms as a osSleep & 1000ms as a run mode

Here is the code snippet

void MainThread(void *argument)
{
  /* USER CODE BEGIN 5 */
  /* Infinite loop */
  for(;;)
  {
    osDelay(4000);
    printf("1\r\n");
    HAL_Delay(1000);
  }
  /* USER CODE END 5 */
}

With that configuration, i can get min 523uA & max 580uA

it means there is no significant difference there!

Then after i tries with the STOP 1/2 modes

However the main issue is, instead of blocking of the 4000 ms during the osSleep the MCU getting wake-up and it's printing the message!

It means, I'm getting the UART log message at every 1 sec!

I have attached the PDF report of the Cube IDE

All suggestions and advice welcome 🙂

Thanks