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[avr-gcc-list] interrupt in as
From: |
Torsten Hahn |
Subject: |
[avr-gcc-list] interrupt in as |
Date: |
Tue, 9 Oct 2001 11:11:10 +0200 |
Hi,
can explain me somebody how can i implement an interrupt-handler purely in
assembler ?
I would need an interrupt routine with no overhead from the c-compiler. If I
use
SIGNAL(INTERRUPT0)
{
asm("nop");
}
I get code output like this:
000000b4 <_interrupt1_>:
b4: 1f 92 push r1
b6: 0f 92 push r0
b8: 0f b6 in r0, 0x3f ; 63
ba: 0f 92 push r0
bc: 11 24 eor r1, r1
be: 00 00 nop
c0: 0f 90 pop r0
c2: 0f be out 0x3f, r0 ; 63
c4: 0f 90 pop r0
c6: 1f 90 pop r1
c8: 18 95 reti
The Problem is now, that i have an extremly time critical applikation and i
have for some reasons only 16 (!) takt-cycles to handle this interrupt
optimal. The code constructet wasts about 12 of them.
Thanks,
TH.
--
Torsten Hahn / Chemnitzer Str. 4 / 09599 Freiberg / Germany
mail: address@hidden
phone: (+49) 177 2181338
pgp key avaiable at: http://math-www.uni-paderborn.de/pgpnet/wwwkeys.html
- [avr-gcc-list] interrupt in as,
Torsten Hahn <=
- Re: [avr-gcc-list] interrupt in as, Christian Troedhandl, 2001/10/09
- Re: [avr-gcc-list] interrupt in as, Clemens Gerlach, 2001/10/09
- Re: [avr-gcc-list] interrupt in as, Kang Tin LAI, 2001/10/09
- Re: [avr-gcc-list] interrupt in as, Tor Ringstad, 2001/10/09
- Re: [avr-gcc-list] interrupt in as, Kujala Matti, 2001/10/10