CHJ/user/Protocol/HWI2CProtocol.c

#include "../main/SystemInclude.h"


//*************************************************************************************
#ifndef ENABLE_USER_I2C
#pragma message("[undefined] ENABLE_USER_I2C")
#elif(ENABLE_USER_I2C)
//*************************************************************************************
/********************************************************************************************************
      
**-------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void I2CResetProcess(void)
{
	I2CData.txCounter = 0;                                                        // 重新初始化数据发送和接收计数器
  I2CData.rxCounter = 0;
  I2CData.state.Command   = 0;                                                          // 清除命令码接收完成标志
  I2CData.state.WriteData = 0;
	I2CData.state.ReceivedAdr = 0; 
  I2CData.state.CommError = 1;
}
/********************************************************************************************************
函数功能：处理从机I2C接收到START+ADDRESS+读命令
**-------------------------------------------------------------------------------------------------------          
********************************************************************************************************/
void I2CStartReadProcess(void)
{
	I2CData.state.ReceivedAdr = 0;	// 清除命令码接收完成标志
	I2CData.state.WriteData   = 0;
	I2CData.txCounter = 0;			// 重新初始化数据发送和接收计数器
	I2CData.rxCounter = 0;		
}

void SetI2CDataToRead(void)
{

}

/********************************************************************************************************
函数功能：处理从机I2C接收到START+ADDRESS+写命令
**-------------------------------------------------------------------------------------------------------          
********************************************************************************************************/
void I2CStartWriteProcess(void)
{
  I2CData.txCounter  = 0;                                                        // 重新初始化数据发送和接收计数器
  I2CData.rxCounter  = 0;  
    
  I2CData.state.ReceivedAdr = 0;                                                 // 清除命令码接收完成标志
  I2CData.state.WriteData   = 1;
}



/********************************************************************************************************
函数功能：处理从机I2C接收数据
**-------------------------------------------------------------------------------------------------------          
********************************************************************************************************/
void I2CReceiveProcess(void)
{
  TypeWord wtData;   

  if(I2CData.rxCounter == SMB_CMD_READ){
    // 要操作的地址2个字节接收完成		
    // if(I2CData.state.WriteData) return;
    I2CData.state.ReceivedAdr = 1;
    wtData.Byte[1]  = I2CData.rxData[0];
    wtData.Byte[0]  = I2CData.rxData[1];
    I2CData.readAddr = wtData.Word;    
    I2CReadDataFromMemory();//读取数据 存放到I2CData.RxData
    I2CDataCopyToSendBuf(); //得到 I2CData.txData
	}
	else if(I2CData.rxCounter > 200){ 
		I2CData.rxCounter = 0;
		I2CData.state.CommError = 1;
	}
}


/********************************************************************************************************
函数功能：处理从机I2C发送数据
**-------------------------------------------------------------------------------------------------------          
********************************************************************************************************/
void I2CTransmitProcess(void)
{     
  if(I2CData.txCounter < 3) return;
	
  I2CData.txCounter = 0;
  I2CData.regCounter++;
  if(I2CData.regCounter >= I2CData.regLen) I2CReadDataFromMemory();

  I2CDataCopyToSendBuf();
}

/********************************************************************************************************
函数功能：将已读取的寄存器数据放到发送缓冲区
**-------------------------------------------------------------------------------------------------------          
********************************************************************************************************/
void I2CDataCopyToSendBuf(void)
{
  I2CData.txData[0] = I2CData.rxData[I2CData.Index++];
  I2CData.txData[1] = I2CData.rxData[I2CData.Index++];
  I2CData.txData[2] = I2CWordCrc(I2CData.txData[0], I2CData.txData[1]);
	
	I2CData.txCounter = 0; 
}

/********************************************************************************************************
函数功能：准备从机I2C需要发送的数据，从内存中读出
**-------------------------------------------------------------------------------------------------------          
********************************************************************************************************/
void I2CReadDataFromMemory(void)     
{
  // 读取数据
	// 按2个字节读取，如果寄存器>2个字节，将返回实际字节个数
	MBBuf.StartAddr  = I2CData.readAddr;
  MBBuf.ByteNumber = 2;
  MBBuf.RxPointer  = &I2CData.rxData[2]; // 读取的数据从2开始放，0，1用于存储接收到的地址
	MBBuf.Index = 0;
	ModBusReadMultiByte();		
	
//	if(MBBuf.StartAddr == 0x0081){
//	I2CData.rxData[2] = 0x00;
//	I2CData.rxData[3] = 0x02;
//	}
//		else{
//	I2CData.rxData[2] = 0x27;
//	I2CData.rxData[3] = 0x10;
//		}
//	MBBuf.DataByte = 2;
	
	MBBuf.DataByte >>= 1;
  I2CData.regLen     = MBBuf.DataByte;
	I2CData.readAddr  += MBBuf.DataByte;  // 下一次读取数据的地址
  I2CData.regCounter = 0;
	I2CData.Index = 2; 
}

/********************************************************************************************************
函数功能：准备从机I2C发送缓存数据
**-------------------------------------------------------------------------------------------------------          
********************************************************************************************************/
void I2CDataProcessing(void)
{
  TypeWord wtData;  
  u16 I, wtIndex=0;

  //----------------------------------------------------------------------------
  I2CData.state.ReceivedData  = 0;
	systemProcess.Bit.I2CHandle = 0; 
  //----------------------------------------------------------------------------
	if(I2CData.rxCounter < 5) return;
  disable_interrupts(); 
  //----------------------------------------------------------------------------
  //写寄存器个数				
  MBBuf.ByteNumber  = (I2CData.rxCounter - 2) / 3;	
  MBBuf.ByteNumber <<= 1; 
	
  wtData.Byte[1]  = I2CData.rxData[0];
  wtData.Byte[0]  = I2CData.rxData[1];
  MBBuf.StartAddr = wtData.Word;  
  MBBuf.EndAddr = MBBuf.StartAddr + MBBuf.ByteNumber;
  
  for(I = 0; I < MBBuf.ByteNumber; I++)
  {
     wtData.Byte[1] = I2CData.rxData[3*I+2];
     wtData.Byte[0] = I2CData.rxData[3*I+3];
     //wtData.Byte[2] = I2CData.rxData[3*I+4];
     //if(wtData.Byte[2] != CRC8_Talbe_I2CWord(wtData.Word[0])) {
	   if(I2CData.rxData[3*I+4] != I2CWordCrc(wtData.Byte[1],wtData.Byte[0])) {
			 enable_interrupts(); 
			 return;
		 }
		
		 I2CData.rxData[wtIndex++] = wtData.Byte[1];
		 I2CData.rxData[wtIndex++] = wtData.Byte[0];
  }
    
  MBBuf.Index = 0; 
  MBBuf.RxPointer = I2CData.rxData;
  //ModBusWriteMultiByte();
  enable_interrupts(); 
}


//------------------------------------------------------------------------------
#endif
//------------------------------------------------------------------------------