dec5502_ad.c

数字信号处理中的AD转换,希望对大家有点用

/******************************************************************************/
/*  Copyright 2004 by SEED Electronic Technology LTD.                         */
/*  All rights reserved. SEED Electronic Technology LTD.                      */
/*  Restricted rights to use, duplicate or disclose this code are             */
/*  granted through contract.                                                 */
/*                                                                            */
/*  MODULE NAME... IIC and Mcbsp											  */
/*  FILENAME...... 5502_CODEC.c   											  */
/*  DESCRIPTION:  															  */
/*  This is an audio signal sample and play example for CODEC of C5502		  */
/*  This example is that the codec is controled by the IIC and Mcbsp 		  */
/*                                                                            */
/*  作者:艾岩                                                                 */
/*  版本:1.0                                                                  */
/*  日期:06.8.30                                                              */
/******************************************************************************/

#include <csl.h>
#include <csl_chip.h>
#include <csl_i2c.h>
#include <csl_pll.h>
#include <csl_mcbsp.h>
#include <csl_emif.h>
#include <csl_emifBhal.h>

#include "E2PROM_Function.h"
#include "CODEC.h"

#undef  CODEC_ADDR
#define CODEC_ADDR 0x1A

#define ADSAMPL8K  0x03
#define ADSAMPL48K 0x0
#define ADSAMPL96K 0x07

#define SAMPLERATE 1
#define SAMPLELONG 3

Uint16 SampleLong;
Uint16 SampleRate;
short DataBuffer[1024]={0};
//Uint16 SampleRate;
//Uint16 SampleLong;
 
// 定义McBSP的句柄
MCBSP_Handle hMcbsp;
			
/*------------------------------------------------------------------------------------*/
//
// FUNCTION: MAIN
//
/*------------------------------------------------------------------------------------*/
                  
void main(void)
{
     Uint16  i = 0;
    short  DataTempR = 0;		// 暂存采样数据
    short  DataTempL = 0;		// 暂存采样数据	
#if SAMPLERATE==1
	SampleRate =ADSAMPL8K;
#endif
#if SAMPLERATE==2
	SampleRate =ADSAMPL44K;
#endif
#if SAMPLERATE==3
	SampleRate =ADSAMPL96K;
#endif
#if SAMPLELONG==1
	SampleLong =256;
#endif
#if SAMPLELONG==2
	SampleLong =512;
#endif
#if SAMPLELONG==3
	SampleLong =1024;
#endif   
// Initialize CSL library - This is REQUIRED !!! 
    CSL_init();

			
// The main frequency of system is 240MHz
// 该频率是为了设置IIC模块的需要设置的,为了使用I2C_setup函数
    PLL_setFreq(1, 0xC, 0, 1, 3, 3, 0);
  
// Initialize I2C, Using parameters in I2C_Setup structure
	I2c_Setup();

// Open McBSP port 1 and get a McBSP type handle
	hMcbsp = MCBSP_open(MCBSP_PORT1,MCBSP_OPEN_RESET);

// Config McBSP	port 1 by use previously defined structure
	Mcbsp_Config(hMcbsp);

// Start McBSP1 
	MCBSP_start(hMcbsp, 
                MCBSP_RCV_START | MCBSP_XMIT_START, 
                0);
                
	inti_AIC(hMcbsp);
	
    for(i=0;i<SampleLong;i++)
   	{
   		DataBuffer[i] = 0;
   	}
 	for(i=0;i<SampleLong;i++)
   	{
		while(!MCBSP_rrdy(hMcbsp)){};
		    DataTempL = MCBSP_read16(hMcbsp);
		while(!MCBSP_rrdy(hMcbsp)){};
		    DataTempR = MCBSP_read16(hMcbsp);
   		DataBuffer[i] = DataTempR;
   	}
	while(1){}; 	    	     	    	   
}

/******************************************************************************/
//	No more
/******************************************************************************/