Re:stack pointer access?

Thanks joseph and ravaz,

I still have much to learn about this ARM architecture. I'll look into what you said. Although I do now think that my simple program is using the main stack, because the SP and LR output I get make sense... although they were not on the offset I originally thought. Though I did notice in my assembler listing of the ISR that the first thing the ISR does is PUSH {LR}, so that explains the wrong offset, I think.

I'm saving your input in case I need to check the other stack though. :)

regards,

Brian