Interrupts for Arm-elf-gcc

Anton Erasmus antera@intekom.co.za
Wed Jul 23 20:15:00 GMT 2003



*********** REPLY SEPARATOR  ***********

On 03/07/22 at 10:47 Shaun Jackman wrote:

>This is what I use. I'd be interested in hearing if anybody has a
>simpler solution. In particular, if __attribute__((interrupt)) has been
>implemented for arm-elf since I used it last.
>
>Cheers,
>Shaun
>
>
>/**
> * Interrupt service routine.
> */
>__attribute__ ((unused))
>     static void isr(void)
>{
>	// your code here
>}
>
>
>/**
> * Dispatch the interrupt service routine.
> */
>void isr_dispatch(void);
>
>__asm("\nisr_dispatch:"
>      "\n  stmfd sp!, {r0-r3, r12, lr}"
>      "\n  bl isr"
>      "\n  ldmfd sp!, {r0-r3, r12, lr}"
>      "\n  subs pc, lr, #4" "\n");
>
>
>On Tue, 2003-07-22 at 10:30, David Mc Kenna wrote:
>> Hi all,
>>
>> How does someone write an interrupt for an ARM,i.e. what directives do I
>use
>> within gcc?
>>
>> Thanks,
>> Dave Mc Kenna

I thought the arm port of gcc supports the __interrupt__
attribute in the latest versions ? Wouldn't this be a better
way to write ones interrupt routines ? The actual dispatch I
think would still need to be assembly.

Regards
   Anton Erasmus



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