模数转换器ADS112C04

#define ADD_ADS112C04_write 0x80

#define ADD_ADS112C04_read 0x81

#define START 0x08           

#define POWERDOWN 0x02         

#define RDATA 0x10        

#define RESET 0x06

#define WREG_0 0x40

#define WREG_1 0x44

#define WREG_2 0x48

#define WREG_3 0x4c

#define RREG_0 0x20

#define RREG_1 0x24

#define RREG_2 0x28

#define RREG_3 0x2c

void WriteReg(unsigned char adds,unsigned char val)

{

IIC_start();

IIC_writebyte(ADD_ADS112C04_write);

IIC_testACK();

IIC_writebyte(adds);

IIC_testACK();

IIC_writebyte(val);

IIC_testACK();

IIC_stop();

}

unsigned char ReadReg(unsigned char adds)

{

unsigned char v;

IIC_start();

IIC_writebyte(ADD_ADS112C04_write);

IIC_testACK();

IIC_writebyte(adds);

IIC_testACK();

IIC_start();    // Repeated START condition

IIC_writebyte(ADD_ADS112C04_read);

IIC_testACK();

v=IIC_readebyte();

IIC_masterNACK();

IIC_stop();

return v;

} 

void ADS_Start()

{

IIC_start();

IIC_writebyte(ADD_ADS112C04_write);

IIC_testACK();

IIC_writebyte(START);

IIC_testACK();

IIC_stop();

}

void ADS_PowerDown()

{

IIC_start();

IIC_writebyte(ADD_ADS112C04_write);

IIC_testACK();

IIC_writebyte(POWERDOWN);

IIC_testACK();

IIC_stop();

}

void ADS_Reset()

{

IIC_start();

IIC_writebyte(ADD_ADS112C04_write);

IIC_testACK();

IIC_writebyte(RESET);

IIC_testACK();

IIC_stop();

}

int ReadData()

{

int v;unsigned char i=0,j=0;

IIC_start();

    IIC_writebyte(ADD_ADS112C04_write);

    IIC_testACK();

    IIC_writebyte(RDATA);

    IIC_testACK();

    IIC_start();    // Repeated START condition

    IIC_writebyte(ADD_ADS112C04_read);

    IIC_testACK();

    i=IIC_readebyte();          

    IIC_masterACK();

    j=IIC_readebyte();          

    IIC_masterNACK();

    IIC_stop();

v=i;

v=v<<8;

v=v|j;

return v;

}