#define DS18B20_DIR  P1DIR
#define DS18B20_IN  P1IN
#define DS18B20_OUT  P1OUT
#define DS18B20_DQ  BIT1  



#define ReadRom   0x33
#define MatchRom  0x55
#define SearchRom  0xf0
#define AlertSearch  0xec
#define CopyScratchpad  0x48
#define SkipRom   0xcc
#define ReadPower  0xb4



#define ConvertTemperature 0x44
#define ReadScratchpad  0xbe
#define WriteScratchpad  0x4e
#define RecallE   0xb8
#define SMCLK   12000  //(KHz)??????


void DS18B20_WriteBit(unsigned char oww_dat);
void DS18B20_WriteByte(unsigned char oww_dat);
void DS18B20_ReadTemp(void);
unsigned char DS18B20_Init(void);
unsigned char DS18B20_ReadBit(void);
unsigned char DS18B20_ReadByte(void);
void Delay10us(void);
void DelayX10us(unsigned char x10us);
float ds1820_temp();