RTC calibration oputput on STM32H7x with LL driver - Bug report

[MD]

Hello,

I tried to enable in the CubeMX section PB2 as calibration output, but it was not working.

The fix is to add a couple of lines after the RTC init:

...  
/** Enable Calibration
  */
  LL_RTC_CAL_SetOutputFreq(RTC, LL_RTC_CALIB_OUTPUT_512HZ);  //<-- will not work, registers are write protected!
  /* USER CODE BEGIN RTC_Init 2 */
  /* Disable the write protection for RTC registers */
  LL_RTC_DisableWriteProtection(RTC);
  LL_RTC_CAL_SetOutputFreq(RTC, LL_RTC_CALIB_OUTPUT_512HZ);
  LL_RTC_EnableOutRemap(RTC);  //<- to enable output on PB2
  /* Enable the write protection for RTC registers */
  LL_RTC_EnableWriteProtection(RTC);
  /* USER CODE END RTC_Init 2 */

[Souhaib MAZHOUD]

Hello @MD and welcome to the community.

Thank you for having reported this issue

Can you please provide more information about the MCU and CubeMX version you have used.

Thank you.

Souhaib

[MD]

Hello, this is for a Nucleo-H755ZI-Q and CubeIDE 1.13.2

I've also attached the ioc file, which should generate the output on PB2 but it doesn't; until you add the lines mentioned earlier.

Regards, Marco

[Souhaib MAZHOUD · Accepted solution]

Hello
Sorry for late answer, this issue is reproduced and it is reported internally .
Internal ticket number: 163446 (This is an internal tracking number and is not accessible or usable by customers).

Thank you

Souhaib