ds18b20.h

AVR atmega64串口驱动

#ifndef  DS18B20_H
#define  DS18B20_H
//************************************************************//
#define ds18b20_dq				PB6
#define set_ds18b20_dq_ddr()	DDRB|=1<<ds18b20_dq    //设为输出
#define set_ds18b20_dq()		PORTB|=1<<ds18b20_dq   //输出1
#define clr_ds18b20_dq()		PORTB&=~(1<<ds18b20_dq)//输出0
#define clr_ds18b20_dq_ddr()	DDRB&=~(1<<ds18b20_dq) //设为输入
#define in_ds18b20_dq()			PINB&(1<<ds18b20_dq)   //读引脚

#define ds18b20_read_rom           0x33
#define ds18b20_match_rom          0x55
#define ds18b20_skip_rom           0xcc
#define ds18b20_search_rom         0xf0
#define ds18b20_alarm_search_rom   0xec
#define ds18b20_write_ram          0x4e
#define ds18b20_read_ram           0xbe
#define ds18b20_copy_ram           0x48
#define ds18b20_convert_tem        0x44
#define ds18b20_eecall_eeprom      0xb8
#define ds18b20_read_power_supply  0xb4
//***************************************************//
//ds18b20

	unsigned char temperature_low;
	unsigned char temperature_high;
	void display_temperature(void);
	void reset_ds18b20(void);
	unsigned char read_ds18b20(void);
	void write_ds18b20(unsigned char data);
	void read_temperature(void);
	void ack_ds18b20(void);
	void convert_ds18b20(void);

#endif