AVR-GCC a expanze makro

[Hynek Sladky]

Neslo. Na zacatku programu mam totiz neco takoveho:

#define	LED PORTA, 0
#define	BUZZER PORTA, 1
#define	RELE PORTA, 2

Uz jsem nasel tri moznosti, jak by to melo fungovat, lec pro me 
pouzitelna je jen jedna (jedna se v avr-gcc preklada spatne, druha je 
slozitejsi na nadefinovani):

#define	pinset__(port,bit) port|=(1<<bit)
#define	pinset(...) pinset__(__VA_ARGS__)

V kodu pak muzu psat:

   pinset (LED);
   pinset (BUZZER);


Hynek Sladky


Zdenek Janis wrote:
> a takhle by to neslo?
> 
> #define	mujport	PORTA
> #define	mujpin	0
> 
> #define	pinset(bit) mujport |= (1<<bit)
> 
> void fnc() {
> 	pinset(mujpin);
> }
> 
> 
> Hynek Sladky wrote:
> 
>>#define	pinset(port,bit) port |= (1<<bit)
>>#define	mujpin	PORTA, 0
>>
>>funkce () {
>>   pinset (mujpin);
>>}
>>
>>Prekladac ale hlasi:
>>eval.c:87:13: macro "pinset" requires 2 arguments, but only 1 given
>>eval.c: In function `funkce':
>>eval.c:87: error: `pinset' undeclared (first use in this function)
> 
>