topic Memory Zero-page in 8-bit Microcontrollers

Memory Zero-page

patti — Tue, 28 Feb 2006 17:23:51 GMT

Hi! I am using MC68HC908GZ16 and Codewarrior. When I use IN-circit function RDVRRNG routine, ref AN2545.pdf. It saves new data at addresses $4C-60, but unfortunally Codewarrior have saved som data already at that location, and results my program to crash! How do I know what codewarrior have placed at location $4C-60, and how do I replace it?

Thanks In advance Patrik

Re: Memory Zero-page

CrasyCat — Tue, 28 Feb 2006 19:19:50 GMT

Hello

Just edit your application .prm file and adjust the addresses specified in the SEGMENTS block to make sure nothing is allocated at 0x4C..0x60.

Also you can take a look at the .map file generated by the linker.

In this file you should be able to check which object is allocated at address 0x4c.

There is a section called "OBJECT LIST SORTED BY ADDRESS" where you should be able to retrieve the information pretty quickly.

CrasyCat

Re: Memory Zero-page

patti — Tue, 28 Feb 2006 20:15:52 GMT

Thanks a lot! When I calculated a bit I noticed that some of variables where bigger than I expected!

Patrik