FLASH IRQ handler not triggered on STM32H753.

[Petró Máté]

Hy.

I have a little problem. I developed an Ethernet based remote firmware update for the STM32H753 uC (rev. V) in a custom board.

The processor erases the BANK2, and than programs it with the new firmware. When the programmed firmware checks correctly, a BANK swap occures and the the processor resets itself.

This bootloader works fine on some hardware, but my problem is that there are hardwares when I call the 'HAL_FLASHEx_Erase_IT()' function (which returns HAL_OK), the 'FLASH_IRQHandler' not triggered.

It's very strange that there are two identical hardwares, and one works fine all the time and the other fails all the time.

I could really use some help,

Thanks.

Petró.

[TDK]

To fire an interrupt, a few things need to happen:

• The interrupt needs enabled within the peripheral (FLASH in this case).
• The corresponding NVIC interrupt needs enabled.
• The interrupt flag needs to fire (you don't say which event you want to fire, but there is a flag for it).
• Interrupts need enabled globally.
• The code must be in the main loop or in an interrupt with lower preemption priority.

Check those. One or more isn't happening.

[Pavel A.]

There's some errata for flash interface and bank switching (especially 2.2.8).

Are you sure that none of your "hardwares" are rev. Y?