MSP430 simulates IIC interface program

    MSP430 MCU ordinary II simulation IIC interface program example.

2-Program routine

   #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

   # DIR_IN P3DIR &=~ BIT3; SDA_1  //I/O port is input

   #define DIR_OUT P3DIR |= BIT3         //I/0 port is output

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

   unsigned int a[50];

/
      {
       TempBit = 1;
      }
   else
     {
      TempBit = 0;
     }
      DIR_OUT;
      TempData = define (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; 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(); xa0); ReceiveAck(); WriteByte(unit); ReceiveAck(); WriteByte(LowData); ReceiveAck();
   
   
   
   
   
   
   
   
   
   
   
   


   
   
   
   
   
   
   
   
   
   
   
   
   
   
     
      
      
      
      
      
     
   
   
   
   
   
   
   


   
     
     
     
     
     
     
     
     
     
     
     
     WriteByte(HighData);
     ReceiveAck();
     Stop();
     Delay(2000);
    }
//******************************************************************************