filter.c

合众达SEED-DTK2812 光盘内容 DSP源码 用户指南 实验手册

/******************************************************************************/
/*  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.                                                 */
/*  FILENAME...... filter.c											  */
/*  PROJECT....... Read and write on-board daram memory of TMS320VC5502	      */
/*  作者: gao		                                                          */
/*  版本:1.0                                                                  */
/*  日期:06.11.10                                                             */
/******************************************************************************/
#include "DSP28_Device.h"
#include "filter.h"
#include "ext_inf.h"
/******************************************************/

/*****************************************************/
unsigned int DataLong=1024;  //采样点数1024
////////////////////////
unsigned int i,j;
unsigned int k= 0;

unsigned short Ad_data[2048];
short Ad_data_signed[2048];
short filter_result[1024];

unsigned int convcount = 0;
volatile unsigned int adconvover =0;
/*****************************************************/
interrupt void ISRTimer2(void);
interrupt void ad(void);

/*****************************************************/
void main(void)
{
	/*初始化系统*/
	InitSysCtrl();

	/*关中断*/
	DINT;
	IER = 0x0000;
	IFR = 0x0000;

	/*初始化PIE中断*/
	InitPieCtrl();

	/*初始化PIE中断矢量表*/
	InitPieVectTable();	
	
    //初始化cputimer
    InitCpuTimers();

 	/*设置中断服务程序入口地址*/
	EALLOW;	// This is needed to write to EALLOW protected registers

	PieVectTable.TINT2 = &ISRTimer2;
	PieVectTable.ADCINT = &ad;

	EDIS;   // This is needed to disable write to EALLOW protected registers
	
	/*开中断*/
	IER |= M_INT1;//ADC中断
	
	EINT;   // Enable Global interrupt INTM
	ERTM;	// Enable Global realtime interrupt DBGM

	/*设置CPU*/
	DINT;
	ConfigCpuTimer(&CpuTimer2, 150, 22);	
 	StartCpuTimer2();
 	
   	 /*开中断*/
	IER |= M_INT14;
	EINT;
	InitAdc();	
		
	for(;;){					
		if (adconvover==1){
	    	/*fir滤波处理*/
	    	for(i=0;i<DataLong;i++)
	    	Ad_data_signed[i]=(short)(Ad_data[i]-0x5300);

		    fir_filter(Ad_data_signed,hfir,filter_result,ORDER_FIR,DataLong,ROUND_FIR);
			adconvover=0;
		}
	}
} 	

interrupt void ad(void)
{
	IFR=0x0000;
	PieCtrl.PIEACK.all=0xffff;
	if(adconvover==0){
		Ad_data[convcount] = AdcRegs.RESULT0;
	    convcount++;
	}
	if (convcount==DataLong){
  		convcount=0;
 		adconvover=1;//接满标志	
	}	
}

interrupt void ISRTimer2(void)
{

	AdcRegs.ADC_ST_FLAG.bit.INT_SEQ1_CLR=1;
	AdcRegs.ADCTRL2.bit.SOC_SEQ1=1;	
	
}



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