Re: [avr-gcc-list] nested macros don't expand

[Joerg Wunsch]

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George Kvirkvia <address@hidden> wrote:

> when I try to use this macro like this:
> set_port_pin(MOTOR_CONTROL_PIN); I get preprocessor error, saying
> that set_port_macro expects 2 arguments and I pass only 1

This needs two levels of indirection:

#define MOTOR_CONTROL_PIN PORTC,1

#define set_port_pin_(port, pin) (port |= (1<<pin))
#define set_port_pin(x) set_port_pin_(x)

set_port_pin(MOTOR_CONTROL_PIN);

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
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