MPC56xx Read flash from user code

[tbonkers]

Is there any restriction on reading Flash from user code in MPC56xx processors? I need to read parts from Shadow and Data flash, and know that erase and write are performed using special drivers, but what about reading?

Normally I'll use the code below:

  	for (i =SHADOW_FLASH_BASE; i <  SHADOW_FLASH_END; i+= 4)
  	{
  		word = *(uint32_t*) i;
  		uart_print_int(word);
  	}
  	

[lukaszadrapa · Accepted solution]

Hi,

you can read the flash directly, there are no restrictions.

It's just expected that the flash area is covered by Memory Management Unit - MMU (not present on e200z0 cores) and it's not protected by Memory Protection Unit - MPU (not all MPC56xx have MPU).

Regards,

Lukas