/* Standard Macros */

/* You can totally get by without these, but why? */

/* Make sure we've already got io / sfr / pindefs loaded */

#ifndef _AVR_IO_H_

#include <avr/io.h>

#endif

/* Reminder: the following useful bit-twiddling macros are

always included in avr/sfr_defs.h, which is called from

avr/io.h

bit_is_set(sfr, bit)

bit_is_clear(sfr, bit)

loop_until_bit_is_set(sfr, bit)

loop_until_bit_is_clear(sfr, bit)

*/

/* Define up the full complement of bit-twiddling macros */

#define BV(bit) (1 << bit)

#define set_bit(sfr, bit) (_SFR_BYTE(sfr) |= BV(bit)) // old sbi()

#define clear_bit(sfr, bit) (_SFR_BYTE(sfr) &= ~BV(bit)) // old cbi()

#define toggle_bit(sfr, bit) (_SFR_BYTE(sfr) ^= BV(bit))