AVR-Chat

While we're on this topic, I'll add in my own "grievance".


>> #define setbit(ADDRESS,BIT) ((ADDRESS) |= (1<<(BIT)))
>> #define clrbit(ADDRESS,BIT) ((ADDRESS) &= ~(1<<(BIT)))


I use sbi() and cbi() for this, pretty much the same thing as the setbit()
and clrbit() described by Svenn.  I think sbi & cbi are built into
avr-gcc, but I'm not sure if they're deprecated or what not. Either way,
they work fine for me.

The thing I dont like is having a separate command (function, macro,
whatever) for setting and clearing.  So in my code there's lots of things
like...

<code>

if (turn_motor_on) {
   setbit(MOTOR_ENABLE_PORT, MOTOR_ENABLE_PIN);
} else {
   clrbit(MOTOR_ENABLE_PORT, MOTOR_ENABLE_PIN);
}

</code>

Personally, I would prefer something like.....

<code>

write_bit(turn_motor_on, MOTOR_ENABLE_PORT, MOTOR_ENABLE_PIN);

</code>

And that magic command "write_bit()" will use the proper sbi or cbi based
upon the value of the "turn_motor_on" flag.

Is there something easily usable to achieve this functionality?


Ethan
www.bufbotics.org