MCF5223x RAM and user/supervisor protection

LightElf — Tue, 25 Mar 2008 17:24:03 GMT

Hello!
Is is possible to protect part of internal RAM from overwriting by user code? I was looked carefully into MCF52235RM and CFPRM and found nothing about RAM protection, other than CACR register, which can only be used to protect RAM as whole (which is not an option for single-chip mode).

Re: MCF5223x RAM and user/supervisor protection

AdamS — Tue, 29 Apr 2008 17:42:02 GMT

Hi,

you can try to define your own memory region in liker command file and mark it as read only. And in your code use a #pragma directive to place your read only data there.

A #pragma is a compiler directive. After you have set the pragma to the desired state, all code after that point is compiled with that setting until either you change the setting or reach the end of the file. At the beginning of each file, the compiler reverts to the project or default settings.

best regards - Adam

ColdFire/68K Microcontrollers and ProcessorsのトピックMCF5223x RAM and user/supervisor protection

MCF5223x RAM and user/supervisor protection

Re: MCF5223x RAM and user/supervisor protection