FLASH_EraseProgram example code for STM32CubeU3 not working. fails in erasing

[rajathks]

I am running the  FLASH_EraseProgram example code provided by STM32CubeU3.  the code fails in erasing the flash and enters ErrorHandler.

I have verified the FLASH_USER_START_ADDR & FLASH_USER_END_ADDR.  it is set as follows. 

#define FLASH_USER_START_ADDR ADDR_FLASH_PAGE_128 /* Start @ of user Flash area */
#define FLASH_USER_END_ADDR (ADDR_FLASH_PAGE_255 + FLASH_PAGE_SIZE - 1) /* End @ of user Flash area */

I have tested in both debug and run mode, it is not working as expected. Is anything to be modified to run the code.

regards,

Rajath

[TDK]

FLASH_EraseProgram should not be called directly. Use HAL_FLASHEx_Erase as is done in the example programs like this one:

https://github.com/STMicroelectronics/STM32CubeU3/blob/453c7fafaeb4774b4b0f6e4f8486e7c183fc254e/Projects/NUCLEO-U3C5ZI-Q/Examples/FLASH/FLASH_EraseProgram/Src/main.c#L146

Show your code.

[rajathks]

Hi TDK,

I am using  the following example code in STM32CubeU3 without any changes. 

Projects/NUCLEO-U385RG-Q/Examples/FLASH/FLASH_EraseProgram

The program does not work properly, Flash page erase fails with PGSERR .

regards.

Rajath

[TDK]

No such issues here running it in STM32CubeIDE. Are you loading it with the Example Selector in STM32CubeMX?

[rajathks · Accepted solution]

Hi TDK,

I resolved the issue. I reset the option bytes to default factory settings.  I think the wrong bank was selected in option byte.

Also observed setting breakpoint in code is affecting the flash erase operation.

Thanks for the help!!

regards,

Rajath