MSP430模拟IIC接口程序

    MSP430单片机普通II模拟IIC接口程序范例。

2-程序例程

    #include "MSP430x14x.h"

    //P3.2 SCL

    //P3.3 SDA

    #define SDA_1 P3OUT |= BIT3         //SDA = 1

    #define SDA_0 P3OUT &=~ BIT3        //SDA = 0

    #define SCL_1 P3OUT |= BIT2         //SCL = 1

    #define SCL_0 P3OUT &=~ BIT2        //SCL = 0

    #define DIR_IN P3DIR &=~ BIT3; SDA_1 //I/O口为输入

    #define DIR_OUT P3DIR |= BIT3        //I/0口为输出

    #define SDA_IN ((P3IN >> 3) & 0x01)  //Read SDA

    unsigned int a[50];

/
      {
       TempBit = 1;
      }
    else
     {
      TempBit = 0;
     }
      DIR_OUT;
      TempData = (TempData << 1) | TempBit;
      SCL_0;
    }
    Delay(5);
    return(TempData);
   }
  
/) && (i < 255))   
     {
       i++;
     }
     DIR_OUT;
     SCL_0;
     Delay(5);
    }

/)
    {
     unsigned char HighData = 0;
     unsigned char LowData = 0;
     unsigned int TempData = 0;
     Start();
    WriteByte(0xa0);
    ReceiveAck();
    WriteByte(unit);
    ReceiveAck();
    Start();
    WriteByte(0xa1);
    ReceiveAck();
    LowData = ReadByte();
    Acknowledge();
    HighData = ReadByte();
    Stop();
    TempData = (HighData << 8) + LowData;
    Delay(1000);
    return(TempData);
    }

/
    {
    unsigned char i;
    unsigned char HighData = 0;
    unsigned char LowData = 0;
    unsigned int TempData = 0;
    Start();
    WriteByte(0xa0);
    ReceiveAck();
    WriteByte(unit);
    ReceiveAck();
    Start();
    WriteByte(0xa1);
    ReceiveAck();
    for (i=0; i<49; i++)
     {
      LowData = ReadByte();
      Acknowledge();
      HighData = ReadByte();
      Acknowledge();
      a[i]= (HighData << 8) + LowData;
     }
    LowData = ReadByte();
    Acknowledge();
    HighData = ReadByte();
    Stop();
    a[49] = (HighData << 8) + LowData;
    Delay(1000);
    }

/, unsigned int WriteData)
    {
     unsigned char LowData = 0;
     unsigned char HighData = 0;
     LowData = (unsigned char)WriteData;
     HighData = (unsigned char)(WriteData >> 8);
     Start();
     WriteByte(0xa0);
     ReceiveAck();
     WriteByte(unit);
     ReceiveAck();
     WriteByte(LowData);
     ReceiveAck();
     WriteByte(HighData);
     ReceiveAck();
     Stop();
     Delay(2000);
    }
//******************************************************************************