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// **********ds1620.h

// Jonathan W. Valvano 1/15/02

// Interface between MC68HC812 and DS1620

//    You may use, edit, run or distribute this file

//    as long as the above copyright notice remains

// See Valvano, Embedded Microcomputer Systems, Chap 3

// bit	status	Configuration/Status Register meaning

// 7	DONE	1=Conversion done, 0=conversion in progress

// 6	THF	1=temperature above TH, 0=temperature below TH

// 5	TLF	1=temperature below TL, 0=temperature above TL

// 1	CPU	1=CPU control, 0=stand alone operation

// 0	1SHOT	1=one conversion and stop, 0=continuous conversions

// temperature 	digital value (binary)	digital value (hex)

// +125.0 C    011111010                 $0FA

//  +64.0 C    010000000                 $080

//   +1.0 C    000000010                 $002

//   +0.5 C    000000001                 $001

//      0 C    000000000                 $000

//   -0.5 C    111111111                 $1FF

//  -16.0 C    111100000                 $1E0

//  -55.0 C    1100
1d3
10010                 $192

// DS1620 MC68HC812A4

// 1 DQ    PS5

// 2 CLK   PS6

// 3 RST   PS7

// 4 GND   ground

// 5 TCOM  not connected

// 6 TLOW  not connected

// 7 THIGH not connected

// 8 Vcc   +5 V with bypass cap to ground

void DS1620_Init(void);                // ritual for DS1620

void DS1620_Start(void);               // start conversion

void DS1620_Stop(void);                // stop conversion

void DS1620_WriteConfig(char data);    // write 
0

config=data

void DS1620_WriteTH(int data);         // write TH=data

void DS1620_WriteTL(int data);         // write TL=data

unsigned char DS1620_ReadConfig(void); // read config/status

unsigned int DS1620_ReadTH(void);      // read TH

unsigned int DS1620_ReadTL(void);      // read TL

unsigned int DS1620_ReadT(void);       // read temperature