Hi,
I want to add a function handling nested interrupts for the controller. Could you tell me the right position to add this function?
startup-file:
Undef_Handler B Undef_Handler SWI_Handler B SWI_Handler PAbt_Handler B PAbt_Handler DAbt_Handler B DAbt_Handler ;IRQ_Handler B IRQ_Handler IRQ_Handler B irq_fnct FIQ_Handler B FIQ_Handler irq_fnct //do some stuff - nested interrupt
I've add one breakpoint to the irq_fnct but it seems that the programm will not reach this part if a interupt occur.
I'm working with the atmel controller AT91SAM7S.
best regards Peter
How did you organized your different interrupts? Do you work without an operating system?
I happen to work with RTX, but an RTOS should not be a factor in the decision to use/avoid nested interrupts. some of my tasks wait for signals from interrupts, to do some later, heavy processing. In the end, you want to build a stable system. As Per mentioned, you cannot do that if you run risk of running out of stack space. Keep your interrupt service routines short. do heavier processing in your main loop (don't forget synchronization issues). if you work efficiently, that should suffice.