Re: [avr-gcc-list] inline asm problem

[whiteman]

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