topic MPC56xx Read flash from user code in MPC5xxx

MPC56xx Read flash from user code

tbonkers — Tue, 01 Mar 2022 13:31:31 GMT

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); }

Re: MPC56xx Read flash from user code

lukaszadrapa — Wed, 02 Mar 2022 11:32:33 GMT

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