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Re: [avr-gcc-list] inline asm problem
From: |
whiteman |
Subject: |
Re: [avr-gcc-list] inline asm problem |
Date: |
Sat, 14 Feb 2004 9:3:0 +0800 |
hi,Clemens Buchacher!
I think you are right! thanks!
======= 2004-02-13 01:59:00 :=======
>On Thu, Feb 12, 2004 at 09:18:37AM +0800, whiteman wrote:
>[...]
>> error message "pwm.c:27: error: impossible constraint in
>> `asm'". what's meaning?
>> My inline asm is :
>> asm volatile("sbi 0,1" : "=I"(PORTC) : "I"(6));
>
>The sbi instruction uses I/O register addresses, so you will have to use
>_SFR_IO_ADDR(PORTC) if PORTC is in this address range (see
><avr/sfr_defs.h> for details). If it is not, you cannot use the sbi
>instruction at all.
>
>hth,
>Clemens
>
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Regards
whiteman
address@hidden
2004-02-14
- Re: [avr-gcc-list] inline asm problem, (continued)