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8051 - compile-time stack - is stack theoretically overflow possible ?

Rochus over 5 years ago

Hi,

From the following link I have understood the compiler analyses the program and sets the stack size for the 8051. I am seeing a stack overlow when one ISR interrupts a lower priority ISR. If the compiler analyses the program and sets the stack, to a size it deems adequate, then how can it overflow ? I am using a 8051 and a Keil compiler.

Any help would be appreciated.

Thanks,

Rochus

Top replies

²erik malund over 5 years ago +1

the linker does NOT 'analyze' the stack size, it just allocates whatever ram is left as stack
Broeker over 5 years ago in reply to Rochus +1 verified

The material you quote explains how C51 manages to keep almost all the data (function arguments, local variables) out of the actual stack, by applying static call tree analysis. You can help it by banking...