main_nonbios.c

一个FIR的滤波的程序

#include "DSP281x_Device.h"				// Peripheral address definitions

#ifdef EXAMPLE_BIOS
    #include "example_BIOS.h"
#endif

#ifdef EXAMPLE_NONBIOS
    #include "example_nonBIOS.h"
#endif
#include "f2812a.h"
#include "ctr.h"
#include "demo.h"
#include "math.h"

// for LCD control
#define LCDDELAY 1
#define LCDCMDTURNON 0x3f
#define LCDCMDTURNOFF 0x3e
#define LCDCMDSTARTLINE 0xc0
#define LCDCMDPAGE 0xb8
#define LCDCMDVERADDRESS 0x40
#define LCDLEFTPAGE 0
#define LCDRIGHTPAGE 1
#define LCDDATABYTE 1
#define LCDDATAWORD 2
#define STRINGREVERSE 1
#define STRINGNOREVERSE 0
#define T46uS		0x0d40
#define SCANCODE_0 0x70
#define SCANCODE_1 0x69
#define SCANCODE_2 0x72
#define SCANCODE_3 0x7A
#define SCANCODE_4 0x6B
#define SCANCODE_5 0x73
#define SCANCODE_6 0x74
#define SCANCODE_7 0x6C
#define SCANCODE_8 0x75
#define SCANCODE_9 0x7D
#define SCANCODE_Del 0x49
#define SCANCODE_Enter 0x5A
#define SCANCODE_Plus 0x79
#define SCANCODE_Minus 0x7B
#define SCANCODE_Mult 0x7C
#define SCANCODE_Divid 0x4A
#define SCANCODE_Num 0x77
#define led *(int *)0xc0000
#define SOUNDBUFFERLENGTH 128
void FFT(float dataR[128],float dataI[128]);
#define pi 3.1415926
#define X0_b 16
#define Y0_b 32
#define X0_t 16
#define Y0_t 16
#define led *(int *)0xc0000

void Delay(unsigned int nTime);		// 延时子程序
void TurnOnLCD();			// 打开显示
void LCDCLS();				// 清除屏幕显示内容
void Gpio_select(void);
void error(int);
void program_stop();
char ConvertScanToChar(unsigned char cScanCode);
void RefreshLEDArray();			// 刷新显示
void SetLEDArray(int nNumber);		// 修改显示内容
unsigned int uWork,bLCD,nScanCode,nMode,bShowAD;
int nModeAD;
unsigned int w[128];
float sin_tab[128],cos_tab[128];
float fDataR[128],fDataR1[128],fDataI[128];
interrupt void adc_isr(void);

Uint16 var1 = 0;
Uint16 var2 = 0;
Uint16 var3 = 0;
Uint16 test_count = 0;
Uint16 Test_flag = 0;
Uint16 Test_var  = 0;
Uint16 Test_status[32];
struct CPUTIMER_VARS CpuTimer0;
int jishu=0;
int jishu1=0;
unsigned int uPort8000;
Uint16 LoopCount;
Uint16 ConversionCount;
int Position;
int nBW=0;//常写0，写1是反写液晶屏。
unsigned char cKey,cOldKey;
Uint16 Voltage1[256];
Uint16 Voltage2[256];
Uint16 ad1,ad2;
Uint16 jia[256];
unsigned int bBreak;
/*fir参数*/
#define PI 3.1415926
#define FIRNUMBER 25
#define SIGNAL1F 1000
#define SIGNAL2F 4500
/*低通滤波器系数可滤掉1k以上的波形，保留1k一下的波形*/
float fHn[FIRNUMBER]={
  0.126,0.085,0.000,-0.103,-0.189,-0.216,-0.155,
-0.000,0.233,0.504,0.756,0.935,1.000,0.935,0.756,
 0.504,0.233,-0.000,-0.155,-0.216,-0.189,-0.103,
 0.000, 0.085, 0.126
};
/*高通滤波器系数可滤掉1k以下的波形，保留1k以上的波形*/
float fLn[FIRNUMBER]={
-0.031,-0.021,-0.000,0.025, 0.047, 0.054,
 0.038, 0.000,-0.058,-0.126,-0.189,-0.233,
 1.000,-0.233,-0.189,-0.126,-0.058, 0.000,
 0.038, 0.054, 0.047, 0.025,-0.000,
-0.021,-0.031
};
float fXn[FIRNUMBER]={ 0.0 };
float fInput,fOutput;
float fSignal1,fSignal2;
float fStepSignal1,fStepSignal2;
float f2PI;
float fIn[256],fOut[256];
int nIn,nOut;
float FIR();
float FIR1();
float InputWave();
int j,a=0;
//int i;
/**********************************************************************
* Function: main()
*
* Description: Main function for F281x example.
**********************************************************************/

void main(void)
{int i,nCount1=0;

/*** CPU Initialization ***/
	InitSysCtrl();						// Initialize the CPU (FILE: SysCtrl.c)

// Section secureRamFuncs contains user defined code that runs from CSM secured RAM
	memcpy(	&secureRamFuncs_runstart,
			&secureRamFuncs_loadstart,
			&secureRamFuncs_loadend - &secureRamFuncs_loadstart);
/*** Main Loop ***/
    bLCD=nMode=0;
	for ( i=0;i<8;i++ )	ledx[i]=(i<<4)|8;	// 生成显示列控制字
	for ( i=0;i<SOUNDBUFFERLENGTH;i++ )
	{
		sin_tab[i]=sin(pi*2*i/SOUNDBUFFERLENGTH);
		cos_tab[i]=cos(pi*2*i/SOUNDBUFFERLENGTH);
	}
	LCDSetDelay(1);
	LCDSetScreenBuffer(nScreenBuffer);		
	*(int *)0x108000=0x80;		// 初始化ICETEK-CTR
	Delay(LCDDELAY);
	*(int *)0x108000=0x0;
	Delay(LCDDELAY);
	*(int *)0x108000=0x80;
	Delay(LCDDELAY);
	*(int *)0x108007=0;			// 关闭东西方向的交通灯
	Delay(LCDDELAY);
	*(int *)0x108007=0x40;	// 关闭南北方向的交通灯
	Delay(LCDDELAY);
	*(int *)0x108007=0x0c1;
	//*(int *)0x108000=0x81;  
    // 打开显示
	LCDTurnOn();
	LCDPutCString(str8,CCXAD,CCYAD,6,1);
	i=*(int *)0x108002;
	k0=k1=0; cKey=cOldKey=0;
	for ( i=0;i<1024;i++ )	nScreenBuffer[i]=0;
	struGraph.pData=nGraphBuf2+20;
	struGraph.uDataMode=DATAINTMODE;
	struGraph.uDataLength=128;
	struGraph.uMaxValue=2704;
	struGraph.uWindowX0=0;
	struGraph.uWindowY0=0;
	struGraph.uWindowX1=128;
	struGraph.uWindowY1=32;
	struGraph.nOriginX=0;
	struGraph.nOriginY=0;
	struGraph.uLineMode=LINEMODE;
	struGraph.bShowXCcoordinate=0;
	struGraph.bShowYCcoordinate=0;
	struGraph1.pData=nGraphBuf1+20;
	struGraph1.uDataMode=DATAINTMODE;
	struGraph1.uDataLength=128;
	struGraph1.uMaxValue=2704;
	struGraph1.uWindowX0=0;
	struGraph1.uWindowY0=32;
	struGraph1.uWindowX1=128;
	struGraph1.uWindowY1=64;
	struGraph1.nOriginX=0;
	struGraph1.nOriginY=32;
	struGraph1.uLineMode=LINEMODE;
	struGraph1.bShowXCcoordinate=0;
	struGraph1.bShowYCcoordinate=0;
	nMode=MODEADC;
	LCDCLS();
   EALLOW;
   SysCtrlRegs.HISPCP.all = 0x3;  // HSPCLK = SYSCLKOUT/6
  
   DINT;

   InitPieCtrl();

   IER = 0x0000;
   IFR = 0x0000;

   EALLOW;  // This is needed to write to EALLOW protected register
   PieVectTable.ADCINT = &adc_isr;
   EDIS;    // This is needed to disable write to EALLOW protected registers

   AdcRegs.ADCTRL1.bit.RESET = 1;		// Reset the ADC module
	asm(" RPT #10 || NOP");				// Must wait 12-cycles (worst-case) for ADC reset to take effect
   AdcRegs.ADCTRL3.all = 0x00C8;		// first power-up ref and bandgap circuits
   
   AdcRegs.ADCTRL3.bit.ADCBGRFDN = 0x3;	// Power up bandgap/reference circuitry
	Delay(200);             // Delay before powering up rest of ADC
	AdcRegs.ADCTRL3.bit.ADCPWDN = 1;		// Power up rest of ADC
	Delay(200);             // Delay after powering up ADC

//   Enable ADCINT in PIE
   PieCtrlRegs.PIEIER1.bit.INTx6 = 1;
   IER |= M_INT1; // Enable CPU Interrupt 1
   EINT;          // Enable Global interrupt INTM
   ERTM;          // Enable Global realtime interrupt DBGM

   LoopCount = 0;
   ConversionCount = 0;
    
// Configure ADC
   AdcRegs.ADCMAXCONV.all = 0x0001;       // Setup 2 conv's on SEQ1
   AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; // Setup ADCINA3 as 1st SEQ1 conv.
   AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x1; // Setup ADCINA2 as 2nd SEQ1 conv.
   AdcRegs.ADCTRL2.bit.EVA_SOC_SEQ1 = 1;  // Enable EVASOC to start SEQ1
   AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1;  // Enable SEQ1 interrupt (every EOS)

// Configure EVA
//Assumes EVA Clock is already enabled in InitSysCtrl();
   EvaRegs.T1CMPR = 0x0080;               // Setup T1 compare value
   EvaRegs.T1PR = 0x500;                 // Setup period register
   EvaRegs.GPTCONA.bit.T1TOADC = 1;       // Enable EVASOC in EVA
   EvaRegs.T1CON.all = 0x1042;            // Enable timer 1 compare (upcount mode)
   
   bBreak=nModeAD=0;
   cKey=cOldKey=0;nCount1==0;
   nIn=0; nOut=0;
   f2PI=2*PI;
   fSignal1=0.0;
   fSignal2=PI*0.1;
   fStepSignal1=2*PI/30;
   fStepSignal2=2*PI*1.4;
	while ( 1 )
	{  Delay(100);
			nScanCode=*(int *)0x108001;
			nScanCode&=0x0ff;
			uWork=*(int *)0x108002;
			if ( nScanCode!=0 && nScanCode!=0x0ff )
			{
				if ( nScanCode==SCANCODE_Enter ) {AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 0;	break;}
				
				else
				{
					cKey=ConvertScanToChar(nScanCode);
				}
			
	 				switch ( cKey )
					{
						case '0':/*两路ad显示*/
						    nModeAD=0;
							struGraph.pData=nGraphBuf2+20;
							struGraph.uDataMode=DATAINTMODE;
							struGraph.uDataLength=128;
							struGraph.uMaxValue=2704;
							struGraph.uWindowX0=0;
							struGraph.uWindowY0=0;
							struGraph.uWindowX1=128;
							struGraph.uWindowY1=32;
							struGraph.nOriginX=0;
							struGraph.nOriginY=0;
							struGraph.uLineMode=LINEMODE;
							struGraph.bShowXCcoordinate=0;
							struGraph.bShowYCcoordinate=0;
							struGraph1.pData=nGraphBuf1+20;
							struGraph1.uDataMode=DATAINTMODE;
							struGraph1.uDataLength=128;
							struGraph1.uMaxValue=2704;
							struGraph1.uWindowX0=0;
							struGraph1.uWindowY0=32;
							struGraph1.uWindowX1=128;
							struGraph1.uWindowY1=64;
							struGraph1.nOriginX=0;
							struGraph1.nOriginY=32;
							struGraph1.uLineMode=LINEMODE;
							struGraph1.bShowXCcoordinate=0;
							struGraph1.bShowYCcoordinate=0;
							break;
						case '1':/*混叠显示*/
						    nModeAD=1;
							struGraph.pData=nGraphBuf1+20;
							struGraph.uDataMode=DATAINTMODE;
							struGraph.uDataLength=128;
							struGraph.uMaxValue=2704;
							struGraph.uWindowX0=0;
							struGraph.uWindowY0=0;
							struGraph.uWindowX1=128;
							struGraph.uWindowY1=64;
							struGraph.nOriginX=0;
							struGraph.nOriginY=0;
							struGraph.uLineMode=LINEMODE;
							struGraph.bShowXCcoordinate=0;
							struGraph.bShowYCcoordinate=0;
							break;
						case '2':/*低通滤波显示*/
						    nModeAD=2;
							struGraph.pData=nGraphBuf3+30;
							struGraph.uDataMode=DATAINTMODE;
							struGraph.uDataLength=128;
							struGraph.uMaxValue=2704;
							struGraph.uWindowX0=0;
							struGraph.uWindowY0=0;
							struGraph.uWindowX1=128;
							struGraph.uWindowY1=64;
							struGraph.nOriginX=0;
							struGraph.nOriginY=0;
							struGraph.uLineMode=LINEMODE;
							struGraph.bShowXCcoordinate=0;
							struGraph.bShowYCcoordinate=0;
							break;
					    case '3':/*高通滤波显示*/
						    nModeAD=3;
							struGraph.pData=nGraphBuf3+30;
							struGraph.uDataMode=DATAINTMODE;
							struGraph.uDataLength=128;
							struGraph.uMaxValue=2704;
							struGraph.uWindowX0=0;
							struGraph.uWindowY0=0;
							struGraph.uWindowX1=128;
							struGraph.uWindowY1=64;
							struGraph.nOriginX=0;
							struGraph.nOriginY=0;
							struGraph.uLineMode=LINEMODE;
							struGraph.bShowXCcoordinate=0;
							struGraph.bShowYCcoordinate=0;
							break;
						                     

				//	}
				}
			}
    	}
	DINT;
	nMode=0;
	//LCDCLS();
	

} //end of main()