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Is FTFA_FSTAT->CCIF reliable as Flash available flag ?

Question asked by Zixun LI on Feb 26, 2019
Latest reply on Feb 28, 2019 by Alexis Andalon

Hi,

 

I'm using KM34Z256 with IAP support. Currently interrupts are disabled during IAP flash write/erase to ensure there is no collision error (IAP code itself is executed in RAM).

 

However I'd like to have some interrupts available during Flash read/write (for example USART and DMA), my approach is :

1.Copy vector table to RAM and modify SCB->VTOR

2.Define all interrupt handlers as ramfunc

3.Check CCIF in interrupt handler before access to flash resident functions.

__ramfunc void SysTick_Handler(void)
{
  msTicks++; /* increment counter necessary in Delay()*/
  if(FTFA->FSTAT & FTFA_FSTAT_CCIF_MASK)
  {
    /* Flash resident function */

   DoEvents();
  }
}

 

I want to know if CCIF flag is a reliable indicator of Flash available ?

 

Thanks,

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