reading constant from paged memory

martinlockner — Tue, 29 Apr 2014 11:35:01 GMT

I am using codewarrior 10.4 with a mc9s08dz128 microcontroller. I have the micro set for banked memory and have placed a constant table in paged memory (it starts at 0x58000). I used the following #pragma to locate the table in paged memory:

#pragma CONST_SEG __FAR_SEG PAGED_ROM

extern const byte printer_fonts [] = {

My problem is reading one of these constant bytes. In reading the documentation it seems like the compiler/linker will automatically handle the extra addressing needed but nothing I have tried works. If I try to read the first byte I get the value that is located at address 0x8000 which means that the page register is not being handled. Anyone run into similar problems? Thanks in advance.

Re: reading constant from paged memory

ZhangJennie — Mon, 05 May 2014 07:03:00 GMT

Hello Martin,

please read attached an3730 document and demo code, which includes how to read/write HCS08 paged memory.

Hope this helps!

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this answer is for you. if it helps, please click on "correct answer " button. thanks!

Best Regards,

ZhangJun

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reading constant from paged memory

Re: reading constant from paged memory