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Stack issue.

Hi ALL,
I using STARTUP.A51 in my C51 Project,It will be start the sp at 0x07, becuase I define many idata in my program.When Call a function in C program, The idata overlap the push value make program counter jmup to error address when in debug mode.
Why the compilier don't auto setting stack ?

Thanks.

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0 Mill Michael over 21 years ago in reply to Andy Neil

Thanks a lot.
So, How to avoide the event appear when idata overlap stack value.I try to modify the sp, but it seem not good solution for the problem.
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0 Mill Michael over 21 years ago in reply to Andy Neil

Thanks a lot.
So, How to avoide the event appear when idata overlap stack value.I try to modify the sp, but it seem not good solution for the problem.
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0 Frank Hu over 21 years ago in reply to Mill Michael
Hi Free,

How about modifing the following code in startup.a51:

?STACK SEGMENT IDATA RSEG ?STACK DS 64 MOV SP,#?STACK-1

Acturally your stack pointer will be put at the end of idata address you are using. If you got a compile error to tell you that idata overlaps, then you have to shorten your statck length.
It should be easy to understand when you have a look at the *.m51 file.

Frank Hu
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