ICD2 stops working when program is at 98 to 99% ROM

[valemike]

First time i experienced this. I'm using a PIC18F252. The ICD2 worked fine, til I hit around 98 to 99% rom usage. Then it stopped working at the main() statement. However, when I program the chip and let it run freely w/o the ICD2, all is fine.

My worst case stack usage is supposedly only 8 deep. I believe i can go to 32 deep. I suspect that the ICD2 debug executive is overwriting some of my code. Anyone have this happen to them?

[Haplo]

Remember, ICDs put a small piece of code at the end of memory of the target to enable the debugging and communication with the ICD board.
I'm not sure about ICD2, but in the case of CCS ICDS, for the PIC18 series, the size of this module is around 800 bytes.

[Ttelmah]

[valemike]

Thanks guys.
Is there a way to tell the compiler to "keep-out" of the last bytes that the ICD will use? Albeit, i'll get a compilation error telling me i'm out of ROM, but i'm just wondering if it's possible.

-Mike

[alexbilo]

To reserve memory you can use #org start,end {}

This way you reserve the specified block and you don't write any data in it. You'll get the Out of ROM error, but at least you'll know when your code is too big!
_________________
Alex

[Mark]

Did you specify ICD=TRUE ?