iic.c

6713音频的代码

#include <csl.h>
#include <csl_i2c.h>
#include <TDS6713EVM.h>
#include <IIC.h>

// Set I2C registers. */
	I2C_Config MyI2CCfgT = {
		I2C_FMKS(I2COAR,A,OF(0x00)),	//Not used if master
		I2C_FMKS(I2CIMR,ICXRDY,MSK)	|
		I2C_FMKS(I2CIMR,ICRRDY,MSK)	|
		I2C_FMKS(I2CIMR,ARDY,MSK)	  |
		I2C_FMKS(I2CIMR,NACK,MSK)	  |
		I2C_FMKS(I2CIMR,AL,MSK),		
		//Master clock frequency is 200kHz(SYSCLK2 is 150MHz)
		I2C_FMKS(I2CCLKL,ICCL,OF(6)),
		I2C_FMKS(I2CCLKH,ICCH,OF(6)),		
		I2C_FMKS(I2CCNT,ICDC,OF(2)),		
		I2C_FMKS(I2CSAR,A,OF(26)),		
		I2C_FMKS(I2CMDR,FREE,RFREE)		|
		I2C_FMKS(I2CMDR,STT,START)		|
		I2C_FMKS(I2CMDR,MST,MASTER)		|
		I2C_FMKS(I2CMDR,TRX,XMT)		  |
		I2C_FMKS(I2CMDR,RM,REPEAD)		|
		I2C_FMKS(I2CMDR,IRS,NRST)		  |
		I2C_FMKS(I2CMDR,STB,NONE),  		
		I2C_FMKS(I2CPSC,IPSC,OF(15-1))		// 10MHz
	};
	
	I2C_Config MyI2CCfgR = {
		I2C_FMKS(I2COAR,A,OF(0x00)),		
		I2C_FMKS(I2CIMR,ICXRDY,MSK)	|
		I2C_FMKS(I2CIMR,ICRRDY,MSK)	|
		I2C_FMKS(I2CIMR,ARDY,MSK)  	|
		I2C_FMKS(I2CIMR,NACK,MSK)	  |
		I2C_FMKS(I2CIMR,AL,MSK),		
		// Master clock frequency is 200kHz(SYSCLK2 is 150MHz)
		I2C_FMKS(I2CCLKL,ICCL,OF(6)),
		I2C_FMKS(I2CCLKH,ICCH,OF(6)),		
		I2C_FMKS(I2CCNT,ICDC,OF(1)),		
		I2C_FMKS(I2CSAR,A,OF(0)),		
		I2C_FMKS(I2CMDR,FREE,RFREE)		|
		I2C_FMKS(I2CMDR,MST,MASTER)		|
		I2C_FMKS(I2CMDR,TRX,RCV)		  |
		I2C_FMKS(I2CMDR,IRS,NRST)		  |
		I2C_FMKS(I2CMDR,STB,NONE),  		
		I2C_FMKS(I2CPSC,IPSC,OF(15-1)) // 10MHz
	};	


// I2C_write16()  Write 16bits data to AIC23 registers. Configure AIC23 control register
// Parameters:	  hI2C(I2C id)  regnum(The related register)  regval(Register value to be written)
//Return:         True or False. 

Uint16 I2C_write16(I2C_Handle hI2C,Uint8 regnum,Uint8 regval)
{
  Uint8 tempdata = 0;
		
  //Waiting for Bit12 of ICSTR ie. BB (Bus Busy) to clear
  waitForBusFree(hI2C);
    
  //Configure I2C
  I2C_config(hI2C,&MyI2CCfgT);
	
	//Write the low data into Data Transmit register
  tempdata = regnum;
  I2C_writeByte(hI2C, tempdata&0xFF); 
  
  //To invoke the start condition
  I2C_start(hI2C);
  
  // Wait until MSB transmit is done
  while(!I2C_xrdy(hI2C));
  
  //Write the high data into Data Transmit register
  tempdata = regval;
  I2C_writeByte(hI2C, tempdata&0xFF); 
  
  //Generate Stop condition
  I2C_sendStop(hI2C);
  
  //Waiting for Bit12 of ICSTR ie. BB (Bus Busy) to clear
  waitForBusFree(hI2C);
  
  return TRUE;

}


// I2C_read16()  Write 16bits data to AIC23 registers. Configure AIC23 control register. 
// Parameters:	 hI2C(I2C id)	regnum(The related register)	regval(Register value to be written)
// Return:	     True or False

Uint16 I2C_read16(I2C_Handle hI2C,Uint8 regnum,Uint8 regval)
{
  Uint8 tempdata = 0;    
  /* Send address. */
   
  //Waiting for Bit12 of ICSTR ie. BB (Bus Busy) to clear
  waitForBusFree(hI2C);
    
  I2C_config(hI2C,&MyI2CCfgT);
	
  //Write the low data into Data Transmit register
  tempdata = regnum;
  I2C_writeByte(hI2C, tempdata&0xFF); 
  
  //To invoke the start condition
  I2C_start(hI2C);
  
  //Wait until MSB transmit is done 
  while(!I2C_xrdy(hI2C));
  
  //Write the high data into Data Transmit register.
  tempdata = regval;
  I2C_writeByte(hI2C, tempdata&0xFF);
  
  //Generate Stop condition 
  I2C_sendStop(hI2C);
  
  //Waiting for Bit12 of ICSTR ie. BB (Bus Busy) to clear
  waitForBusFree(hI2C);
 
  //Wait for the time from transmit to receive
  TDS6713EVM_wait(0x200);
  
  //Receive data
  I2C_config(hI2C,&MyI2CCfgR);
  
  //Generate start condition, starts transmission
  I2C_start(hI2C);
  while(I2C_FGETH(hI2C,I2CSTR,ARDY));
  
  //Wait until MSB transmit is done
  while(!I2C_rrdy(hI2C));

  //Submit the MSB for transmit 
  regval = I2C_RGETH(hI2C, I2CDRR);
      
  //Generate stop condition
  I2C_sendStop(hI2C); 
   
  //Waiting for Bit12 of ICSTR ie. BB (Bus Busy) to clear
  waitForBusFree(hI2C);
  
  return TRUE;

}

//This function waits until the I2C bus busy bit is reset
waitForBusFree(I2C_Handle hI2C)
{
	//Waiting for Bit12 of ICSTR ie. BB (Bus Busy) to clear
	while(I2C_bb(hI2C));
}

//This function waits till the I2C bus busy bit gets set
waitForBusBusy(I2C_Handle hI2C)
{
	//Waiting for Bit12 of ICSTR ie. BB (Bus Busy) to set
	while(!I2C_bb(hI2C));
}