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Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!
From: |
User Tomdean |
Subject: |
Re: [avr-gcc-list] SIGNAL or INTERRUPT ?! |
Date: |
Sat, 3 Sep 2005 09:52:02 -0700 (PDT) |
Sorry, I omitted, build one of each and look at the output of
avr-objdump -d. If you need to be very fast, you can use the naked
attribute and do all the save/restore yourself. Your handler should
NOT change the status register so if you use naked, save and restore
SREG.
/*
* work.c = test something
*/
#include <avr/io.h>
#include <avr/signal.h> /* cli */
int main() {
while (1);
return 0;
}
/* vector 14 - handler does NOT contain an sei instruction */
SIGNAL(SIG_ADC) {
}
/* vector 10 - handler contains an sei instruction */
INTERRUPT(SIG_SPI) {
}
# avr-objdump -d work.elf
...
00000098 <__vector_14>:
98: 1f 92 push r1
9a: 0f 92 push r0
9c: 0f b6 in r0, 0x3f ; 63
9e: 0f 92 push r0
a0: 11 24 eor r1, r1
a2: 0f 90 pop r0
a4: 0f be out 0x3f, r0 ; 63
a6: 0f 90 pop r0
a8: 1f 90 pop r1
aa: 18 95 reti
000000ac <__vector_10>:
ac: 78 94 sei
ae: 1f 92 push r1
b0: 0f 92 push r0
b2: 0f b6 in r0, 0x3f ; 63
b4: 0f 92 push r0
b6: 11 24 eor r1, r1
b8: 0f 90 pop r0
ba: 0f be out 0x3f, r0 ; 63
bc: 0f 90 pop r0
be: 1f 90 pop r1
c0: 18 95 reti
tomdean
- [avr-gcc-list] SIGNAL or INTERRUPT ?!, Vincent Trouilliez, 2005/09/03
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, User Tomdean, 2005/09/03
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!,
User Tomdean <=
- Message not available
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, Joerg Wunsch, 2005/09/03
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, Russell Shaw, 2005/09/03
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, Joerg Wunsch, 2005/09/04
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, Royce Pereira, 2005/09/04
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, Joerg Wunsch, 2005/09/04
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, Russell Shaw, 2005/09/04
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, Vincent Trouilliez, 2005/09/04
- Re: [avr-gcc-list] SIGNAL or INTERRUPT ?!, Joerg Wunsch, 2005/09/04