def._h

这是一个用温度计和时钟程序,芯片是ATmega16,电路稳定,绝对好用而且易懂

/****************************************/
//定义MCU与LCD的接口
/******************************************
MS1602 PIN DEFINE:
RS	   PA2
EN	   PA3
D4~D7  PB0~PB3
******************************************/
#define LCD_DATA_PORT	  PORTB
#define LCD_CONTROL_PORT  PORTA
#define LCD_DATA_DDR	  DDRB
#define LCD_CONTROL_DDR   DDRA
#define LCD_DATA_MASK     0x0F
#define RS				  (1<<2)
#define EN				  (1<<3)
#define SET_RS()		  LCD_CONTROL_PORT |= RS
#define CLR_RS()		  LCD_CONTROL_PORT &= ~RS
#define SET_EN()		  LCD_CONTROL_PORT |= EN
#define CLR_EN()		  LCD_CONTROL_PORT &= ~EN
#define xtal 8			  //晶振调整 MHz

#define uint8_t unsigned char
#define uint16_t unsigned int
/****************************************/
/******************************************
DS18B20 PIN DEFINE:
Dout 	PD7
******************************************/
#define BEEP			  (1<<2)
#define BEEP_PORT		  PORTD
#define BEEP_DDR		  DDRD
#define BEEP_ON(); 		  BEEP_PORT |= BEEP;
#define BEEP_OFF(); 	  BEEP_PORT &= ~BEEP;

#define	DS18B20_IO		  (1<<7)
#define DS18B20_PORT	  PORTD
#define DS18B20_DDR		  DDRD
#define Set_high(); 	  DS18B20_DDR |= (1<<7);DS18B20_PORT |= (1<<7);
#define Set_low(); 		  DS18B20_DDR |= (1<<7);DS18B20_PORT &= ~(1<<7);
#define Read(); 		  DS18B20_DDR &= ~(1<<7);

#define Units(); 		  LCD_write_byte(0,0xdf);LCD_write_byte(0,'C');
#define Negative(); 	  LCD_write_byte(0,'-');
#define Positive(); 	  LCD_write_byte(0,'+');
/****************************************/

/******************************************
DS1302 PIN DEFINE:
/RST     PD6
SCLK	 PD4
IO		 PD5
******************************************/
#define SCLK	 	   (1<<3)
#define IO 		 	   (1<<4)
#define RST		 	   (1<<5)
#define RET_PORT	   PORTD
#define SCLK_PORT	   PORTD
#define IO_PORT	   	   PORTD
#define IO_DDR		   DDRD
#define IO_PIN		   PIND
#define DS1302_DDR	   DDRD
#define DS1302_PORT	   PORTD
#define SET_RST()	 	   {RET_PORT |= RST;}	 
#define CLR_RST()		   {RET_PORT &=~ RST;}
#define SET_SCLK()		   {SCLK_PORT |= SCLK;}
#define CLR_SCLK()		   {SCLK_PORT &=~ SCLK;}
#define SET_IO()		   {IO_PORT |= IO;}
#define CLR_IO()		   {IO_PORT &=~ IO;}
#define SET_IO_INPUT()	   {IO_DDR &=~ IO;}	 
/***************************************************************
COMMAND/ADDRESS FORMAT
	bit7    bit6    bit5    bit4    bit3    bit2    bit1    bit0
	 1		RAM/CK	 A4		 A3		 A2		 A1		 A0		R/W
***************************************************************/
//        second,mintue,hour,date,month,day,year,control,trickle charge,clock burst
//adderss:	 0	 	1	 2    3    4     5   6    7           8             9
/**************************************************************/