ports.h

里面给出了ATmega103单片机编程的C语言实例程序

/* ATmega103 ports.h File 

   Author : Robert Stuart 
   Company : PDL Industries Ltd 
   Date of Creation : 18 October 1999
*/

/* defines */

/* Port D */
#define INITIALISE_PORTD         0xE0
#define CONFIGURE_PORTD 	   0x00
#define UP_BUTTON 		   BIT(PIND4)
#define DOWN_BUTTON 	   BIT(PIND3)
#define SET_BUTTON 		   BIT(PIND2)
#define BUTTON 		   (PIND & (UP_BUTTON | DOWN_BUTTON | SET_BUTTON))

/* Port E */
#define INITIALISE_PORTE         0x00
#define CONFIGURE_PORTE	   0x00
#define POWER_SUPPLY_OK   	   (~PINE & BIT(PINE4))