ds18b20.h

DS18B20最全驱动.包含CRC8算法.ROM Search等.主机采用AVR mega16或者mega32.原创作品.

#ifndef __DS18B20__H__
#define __DS18B20__H__

#define OneWirePORT		PORTA
#define OneWireDDR		DDRA
#define OneWirePIN		PINA
#define DS18B20			0


#define ReadTCounterTimeout		40
#define _ConvertT				1
#define _ReadT					2

#define CheckDS18B20Timeout		1000


extern volatile unsigned char EnableOneWireFlag;
extern volatile unsigned char OneWireConnectFlag;
extern volatile unsigned int  DataT;
extern volatile unsigned char _T;
extern volatile unsigned char DataT_shi;
extern volatile unsigned char DataT_ge;
extern volatile unsigned char ProcessReadT;
extern volatile unsigned char ReadTFlag;
extern volatile unsigned char ReadTCounter;
extern volatile unsigned char TChangeFlag;
extern volatile unsigned char LastT;
extern volatile unsigned char TWarningFlag;
extern volatile unsigned char OneWireID[8];
extern volatile unsigned char TemperatrueBuffer[6];
extern volatile unsigned int  CheckDS18B20Counter;
extern volatile unsigned char CheckDS18B20TimeoutFlag;


extern unsigned char CRC8(unsigned char *checkbuf,unsigned char checkbyte);
extern void OneWireInit(void);
extern void WriteOneWire(unsigned char Data);
extern unsigned char ReadOneWire(void);
extern void ReadTemperature(void);
extern void TemperatureProcessing(void);
extern void ReadOneWireID(void);
extern void DS18B20Processing(void);

#endif