FLASH_DRV_BlankCheck ERROR

[thomasbao]

Hello,

  I am developing a bootloader to update the application, when I only brush bootloader I can write my application through bootloader, but when I jump from application to bootloader, FLASH_DRV_BlankCheck fails while erasing flash.
    my test code and traffic as follows:

thomasbao_3-1631859115026.png

thomasbao_1-1631858742111.png

     Obviously, FLASH_DRV_Erase and FLASH_DRV_CheckEraseStatus all successed, but FLASH_DRV_BlankCheck error, returns STATUS_ERROR, I wonder why and what should I do to solve it?

[lukaszadrapa · Accepted solution]

Hi,

this is caused by cache, most likely, so try to invalidate the cache after erase. Code for cache invalidation can be found in the startup files (like attached).

Regards,

Lukas