logic.h

里面给出了ATmega103单片机编程的C语言实例程序

/* ATmega103 logic.h file 

   Author : Robert Stuart 
   Company : PDL Industries 
   Date of Creation : 6 September 1999
*/

/* defines */
#define TRUE 	    	   255
#define UNSIGNED_INT_LIMIT 	   0xFFFF
#define CHARACTER_NULL 	   0x00

/* enables an unsigned char to be used as a series of booleans */
#define BIT(x)	        	   (1 << (x))
#define SETBIT(x, y)   	   (x |= y)
#define CLEARBIT(x, y) 	   (x &= ~y)
#define CHECKBIT(x, y) 	   (x & y)
#define MINIMUM(x, y)  	   (x < y ? x : y)

/* if true then the eeprom is executing a pervious write and can not be interrupted */
#define EEPROM_BUSY        	   (EECR & BIT(EEWE))

/* entering sleep mode */
#define SLEEP     	     	   asm("SLEEP")

/* reset watchdog */
#define WDR       	   	   asm("WDR")

/* enable global interrupts */
#define GIE      	        	   (SREG |= BIT(7))

/* disable global interrupts */
#define GID       	         	   (SREG &= ~BIT(7))

/* constants used for timing */
#define _1SEC 	   	   1000
#define _1MS_INTERRUPT           6000
#define _500MS		   500
#define _50MS 	   	   50
#define _20MS		   20

/* defines from button.h */
#define BUTTON_RESET 	   0x01
#define BUTTON_SINGLE 	   0x02
#define BUTTON_HOLD 	   0x04

/* defines from lcd.h */
#define LINE1 		   1
#define LINE2 		   2
#define LINE1_AND_LINE2 	   3
#define CHARACTER_NULL 	   0x00
#define CHARACTER_C 	   0x43
#define CHARACTER_F 	   0x46
#define CHARACTER_BRACKET 	   0x5D
#define CHARACTER_BLANK 	   0x60
#define CHARACTER_ARROW 	   0x7E
#define CHARACTER_SPACE 	   0x20
#define CHARACTER_DEGREE 	   0xDF
#define CHARACTER_BLOCK 	   0xFF

/* defines from power.h */
#define POWER_RESET 	   0x00
#define POWER_OK 		   0x01
#define POWER_SCREENSAVER	   0x02
#define POWER_SAVE	             0x04