AVR-Chat

Don Kinzer wrote:
>
>
> Perhaps this is simply an exercise but the code does nothing other
> than use CPU cycles.
>
> Don Kinzer
>
   Yes, it is precisely an exercise, will never run in silicon.

Now I am getting the following:

asm volatile (

    "    ldi    R16,    (%0)    \n"
    "    ldi R17,    (%1)    \n"
    "    ldi R18,    (%2)    \n"
    "    ldi    R19,    (%3)    \n"

    "    mov    (%3),    R19        \n"
    "    mov    (%2),    R18     \n"
    "    mov    (%1),    R17        \n"
    "    mov (%0),    R16        \n"

     : "=r" (var1) , "=r" (var2) , "=r" (var3) , "=r" (var4):
       "0" (var1) , "1" (var2) , "2" (var3) , "3" (var4) :
       "r16", "r17", "r18", "r19" );

}

errors:
C:\Users\avrFreak\AppData\Local\Temp/ccFmqAas.s:61: Error: constant 
value required
C:\Users\avrFreak\AppData\Local\Temp/ccFmqAas.s:62: Error: constant 
value required
C:\Users\avrFreak\AppData\Local\Temp/ccFmqAas.s:63: Error: constant 
value required
C:\Users\avrFreak\AppData\Local\Temp/ccFmqAas.s:64: Error: constant 
value required
make: *** [embedded_asm.o] Error 1


What, exactly, is it complaining about not be a "constant" value, and h 
ow do I fix this?


avrFreak