56f8367 Flash writing problem

[TroyCorser]

Hi All,

I'm using DSP 56f8367. Programming with CodeWarrior.

My software is handled by MicroC/OS-II RTOS.

The problem is that when  I try to save some data writing into the flash memory the DSP lose the control.

If I'm in debug mode the code execution finish into:

"#pragma interrupt alignsp
void Cpu_Interrupt(void)
{
  asm(DEBUGHLT);                      
}"

this are the steps I use to call the processor expert routine that write the flash memory:

OSIntEnter();
                      
            err = Flash_SetByte(address*2 , *cast_byte);

OSIntExit();

The OSIntEnter()  is used to tell to the RTOS that the DSP is about to service an interrupt  service routine (ISR).

The address I use starts from the:

DATA_FLASH_START 16384

till 16484

any Ideas on what I wrong?

[william_jiang · Accepted solution]

Is there any error code returned when you call "err = Flash_SetByte(address*2 , *cast_byte);"? How about using Flash_SetWord()?

Is there any interrupt service routine that accesses the data in the data flash? If so, disable these interrupt routines before erasing/programming the flash. That is the code snippet looks like this:

OSEnterCritical();     // disable all interrupts                 
            err = Flash_SetByte(address*2 , *cast_byte);

OSExitCritical(); // enable interrupts