新发布高精度温度传感芯片DS1624的完整程序

/**********************************

晶振

:11.0592M

模拟

I2C

总线操作

DS1624

2007/11/27

编写

:fjh

/**********************************/

#include

#include

#include

#define uchar unsigned char

#define uint unsigned int

#define ulong unsigned long

#define SCL_H PORTD|=(1<<4)

#define SCL_L PORTD&=~(1<<4)

#define SDA_H PORTD|=(1<<5)

#define SDA_L PORTD&=~(1<<5)

unsigned char temperdata[2]={0,0};

unsigned char buffer[6]={1,1,1,1,1,1};

< /p>

/******************

应用程序

********************/

void timer1_init(void);

void delay(uchar us);

void Start(void);

void Stop(void);

void SendByte(uchar Dat);

uchar ReceiveByte(uchar b);

void Start_Temperature_T(void);

void I2cByteRead(void);

void data_to_buffer(uint a);

void Display(void);

/************************** ********************/

void port_init(void)

{

PORTA = 0xff;

DDRA = 0xff;

PORTB = 0xff;

DDRB = 0xff;

PORTC = 0xff;

DDRC = 0xff;

PORTD = 0x00;

DDRD = 0xff;

PORTE = 0xff;

DDRE = 0xff;

PORTF = 0xff;

DDRF = 0xff;

PORTG = 0x00;

DDRG = 0x00;

}

// actual value: 1.000Sec (0.0%)

void timer1_init(void)

{

TCCR1B = 0x00; //stop

TCNT1H = 0xD5; //setup

TCNT1L = 0xD1;

OCR1AH = 0x2A;

OCR1AL = 0x2F;

OCR1BH = 0x2A;

OCR1BL = 0x2F;

OCR1CH = 0x2A;

OCR1CL = 0x2F;

ICR1H = 0x2A;

ICR1L = 0x2F;

TCCR1A = 0x00;

TCCR1B = 0x05; //start Timer

TIMSK = 0x04; //timer interrupt sources

}

#pragma interrupt_handler timer1_ovf_isr:15

void timer1_ovf_isr(void)

{

uint temperbuf=0;

ulong temperbuff=0;

//TIMER1 has overflowed

TCNT1H = 0xD5; //reload counter high value

TCNT1L = 0xD1; //reload counter low value

PORTF=~PORTF;

I2cByteRead();

buffer[5]=temperdata[1]/10;

buffer[4]=temperdata[1]%10;

temperbuf=temperdata[0];

temperbuf=(temperbuf>>3)*312;

data_to_buffer(temperbuf);

Display();

Start_Temperature_T();

}

void delay(uchar us)

{

while(us--);

}

/************************START********* ******************/

void Start(void)

{

//SDA_H;

delay(5);

SCL_H;

delay(5);

SDA_L;

delay(5);

SCL_L;

delay(5);

}

void Stop(void)

{

//SDA_L;

delay(5);

SCL_H;

delay(5);

SDA_H;

delay(5);

SCL_L;

delay(5);

}

< /p>

/*************************************** *****************/

/******* ****

向

I2C

总线发送一个字节< /p>

+

接收一个

ACK********** **/

void SendByte(uchar Dat)

{

uchar i=0;

uchar T_Data=0;

DDRD|=(1<<1);//

输出