Do I need to invalidate D-Cache after HAL_Flash_Program?

[rndkd1]

Hello,

I’m working with an STM32H723 MCU and have a question about Flash behavior when caches are enabled.

Both D-Cache and I-Cache are enabled, and I’m not using any additional MPU configuration.

I'm using D-Cache invalidate after a Flash erase operation.

Do I also need to invalidate the D-Cache after a Flash write?

Below is my current code. The D-Cache invalidate is commented out.

everything works fine, but I want to prevent any potential issues in the future.

static int32_t flash_write_words(uint32_t addr, uint32_t *data)
{
    volatile uint32_t *flash = (uint32_t *)addr;
    const uint32_t num_words = FLASH_NB_32BITWORD_IN_FLASHWORD;

    // check erased
    for (uint32_t i = 0; i < num_words; i++)
    {
        if (flash[i] != 0xFFFFFFFFU)
        {
            return -1;
        }
    }

    // write words
    if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_FLASHWORD, addr, (uint32_t)data) != HAL_OK)
    {
        return -1;
    }

    // SCB_InvalidateDCache_by_Addr((uint32_t *)addr, 32U);

    return 0;
}