Bug STM32L452CEU6 Internal WakeUp using RTC using CubeMX

[michi_22]

Hi All

I switched form a STM32L412CBU6 to a STM32L452CEU6 MCU and created therefore a new project. The enable of the Internal Wakeup with RTC is not generated anymore into the rtc.c file using CubeMX Version 6.6.1. (I'm using the option seperte .c/.h file in the code generation setting tab).

[Semer CHERNI · Accepted solution]

Hello @MHoh.1l​ 

First let me thank you for posting.

After investigation I was able to reproduce the same behavior using the same environment as you did.

As a temporary solution I propose that you add the following instructions in the void MX_RTC_Init(void) function in the rtc.c file:

  /* USER CODE BEGIN RTC_Init 2 */
  /** Enable the WakeUp
  */
  if (HAL_RTCEx_SetWakeUpTimer(&hrtc, 0, RTC_WAKEUPCLOCK_RTCCLK_DIV16) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE END RTC_Init 2 */

This is an example of implementation of the solution; you can set the wakeup clock divider and the counter value as you need and pass the values to HAL_RTCEx_SetWakeUpTimer function.

With this being said, this problem is raised internally to be reviewed. I'll keep you posted with the updates.

Internal ticket number: 138078 (This is an internal tracking number and is not accessible or usable by customers).

Thx

Semer.

[michi_22]

Hi Semer

Thanks for your reply. I already impelmented it as shown by your example.

Best regards,

michi