adc_pwm_no_pass_ch.c

基于TMS320F2812的AMR+RS编解码+OFDM调制解调源程序。是stand alone运行版本

#include "DSP28_Device.h"
#include "RS.H"
#include "setting.h"
#include "new3.h"


interrupt void eva_cmp1_isr(void);
//interrupt void evb_cmp4_isr(void);
interrupt void adc_isr(void);

extern int16 buffer3[];
extern int16 buffer4[];
extern int16 synth[];


//WordType FrameTx = TotalFrame;
//WordType FrameRx = TotalFrame;
//WordType RxFirstFrame = 1;
WordType AdcFrame = 4;
//WordType PwmFrame = 1;
   
Uint16 i, j = 0;
Uint16 ConversionCount = 1;
Uint16 EncFlag = 0;
Uint16 DecFlag = 0;
//Uint16 PwmFlag = 1;
//Uint16 PwmConv = 0;
Uint16 DemoduFlag = 0;
Uint16 PWMOFDMStart = 0;    
Uint16 PwmoutStart = 0;                              
Uint16 PwmCount = 0;                                   //音频输出计数 
Uint16 pwmtestCount = 0;
Uint16 EncNum = 0;
Uint16 ModuDataOutNum = 0;                             //调制数据输出计数
Uint16 ADCInputVoiceNum = 0;                              //音频输入采样计数
Uint16 ADCModuDataNum = 88;                             //调制数据采样输入计数
Uint16 	Voltage1[480];                                  //音频输入采样
extern int    Voltage2[3200];                                 //调制后的数据发射
//extern int  Voltage3[2000];                                 //调制后的数据接收 
int 	Voltage4[320];                                  //音频输出
int    *pModuData = Voltage2;
int    *pADCModuData = Voltage2;                       //指示待调制数据
int    ModuFrame;
//int    ModuPreFrame = 5;
//int    DemoduFrame;                                    //解调的帧数 
extern int demodushift;

Uint16 volt2flag;	//voltage2 buffer pointer
int16 OFDM_frame;


Uint16 FrameSynFlag = 0; // OFDM demodulate frame synch starting flag
Uint16 FrameSyn;
Uint16 volt3flag;
int *DecoData = buffer4;
Uint16 OFDMSampleStart = 0;
Uint16 SampleDelay = 0;
Uint16 TestCnt = 0;
Uint16 Div2Flag = 1;

void main(void)
{
 
    DINT;
    InitSysCtrl();
    InitFlash();
       
   	EINT;
    EALLOW;
    SysCtrlRegs.HISPCP.all = 0x0000;	// HSPCLK = SYSCLKOUT = 150MHz
    EDIS;
    
    EALLOW;
    GpioMuxRegs.GPAMUX.all = 0x00FF;
    GpioMuxRegs.GPBMUX.all = 0x00FF; 
    EDIS;
   
   	DINT;
	IER = 0x0000;
	IFR = 0x0000;
	

	InitPieCtrl();
	
	InitPieVectTable();	

    InitAdc();
    
    AdcRegs.ADCTRL3.bit.ADCCLKPS = 0x0003;      //ADC clock =150/6=25M
    AdcRegs.ADCTRL1.bit.CPS = 0x0000;
   // AdcRegs.ADCTRL1.bit.ACQ_PS = 0x0009;      // SAM/HOLD = 400/10 = 40KHz  
    
    EALLOW;
	PieVectTable.ADCINT = &adc_isr;
	PieVectTable.CMP1INT  = &eva_cmp1_isr;
//	PieVectTable.CMP4INT  = &evb_cmp4_isr;
	EDIS;
    
    PieCtrlRegs.PIEIER1.bit.INTx6 = 1;//AD
	PieCtrlRegs.PIEIER2.bit.INTx1 = 1;//compare1 interrupt voice output
  // PieCtrlRegs.PIEIER4.bit.INTx1 = 1;//compare4 interrupt OFDM signal output		
    	
	IER |= (M_INT1 | M_INT2 | M_INT4);

	EINT;
	ERTM;  
	
    
 
   // Configure ADC
    AdcRegs.ADCMAXCONV.all = 0x0000;       // Setup 2 conv's on SEQ1
    AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0000; // Setup ADCINA0 as 1st SEQ1 conv.
  //  AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x0008; // Setup ADCINB0 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)       


    EvaRegs.GPTCONA.bit.T2TOADC = 2;       // Enable EVASOC in EVA
	EvaRegs.T2CNT = 0x0000;   
    EvaRegs.T2PR =0x493E;                  // SOC 采样频率= 8K
    EvaRegs.T2CON.all = 0x1040;            // Enable timer 2 compare (upcount mode)   

	EvaRegs.T1PR = 0x249F;                 // PWM 输出语音频率= HSPCLK/9375=16KHz   
    EvaRegs.T1CNT = 0x0C35;   
    EvaRegs.CMPR1 = 0x0000;                // 调制后的数据发送   
    EvaRegs.T1CON.all = 0x1042;            // Enable timer 1 compare (upcount mode)       
 /*   
    EvbRegs.T3PR = 0x249F;                 // PWM 输出OFDM信号频率= HSPCLK/9375=16KHz   
    EvbRegs.T3CNT = 0x186A;   
    EvbRegs.CMPR4 = 0x0000;                // 解码后的数据进行D/A
	EvbRegs.T3CON.all = 0x1042;      
 */  	
   // Configure EVA
	EvaRegs.EVAIMRA.all = 0x0002;
    EvaRegs.EVAIFRA.all = 0x0002;
    EvaRegs.ACTRA.all = 0x0666;
	EvaRegs.DBTCONA.all = 0x0000; // Disable Dead Band Unit
    EvaRegs.COMCONA.all = 0xA600;
 /*   
   // Configure EVB
   EvbRegs.EVBIMRA.all = 0x0002;
   EvbRegs.EVBIFRA.all = 0x0002;
   EvbRegs.ACTRB.all = 0x0666;
   EvbRegs.DBTCONB.all = 0x0000; // Disable Dead Band Unit
   EvbRegs.COMCONB.all = 0xA600;  
  */	
    asm(" nop");
    asm(" nop");
    asm(" nop");    
    asm(" nop");    
    asm(" setc 	 ovm,sxm");    
    asm(" spm	 1");    
    
    
    initiate(); //编码初始化
    Speech_Decode_Frame_init();
    Init_RS();
	
	//初始化参数
	PWMOFDMStart = 0;
	EncFlag = 0;     
    EncNum = 0;
    ModuFrame = -1;
    pModuData = Voltage2;
  	OFDM_frame = 0;  
    volt2flag = 3200;  
    demodushift = 0;
    TestCnt = 0;
       
    /*Main function*/
    while (1)
    {
    	//语音编码和调制
		if(EncFlag == 1)                    	//EncFlag为0表示接收数据不够编码,一直等待
		{
			for(i=0; i<160; i++)
   			{
   				buffer3[i] = voice_in[160*EncNum + i];
   			//	buffer3[i] -= 0x08D6;
   			}	
			if(++EncNum == 30)
		  		EncNum = 0;
			EncFlag = 0; 			
			    
	  	 	codamr();                   //语音编码
	  	/*	for(i=0; i<103; i++,j++)
			{		
				buffer3[i] = AmrCode[j];					
				if(j == 5150)
				{
					j = 0;				
				}
			}*/	  	 			
	  	 		
			//跟踪voltage2的OFDM数据块存储位置
			ModuFrame = RS_OFDM_Mod();			
		
			 
			if(ModuFrame == 1)
			{				
				pModuData = Voltage2 + 1040;
				//FrameSyn = FindFrame(Voltage2);
				pADCModuData = Voltage2 + 176;
				DecFlag = Receive(pADCModuData, DecoData);
				demodushift = 0;
			}
			
			else if( ModuFrame == 2 )
			{
				pModuData = Voltage2 + 1760;
				pADCModuData += 864;
				DecFlag = Receive(pADCModuData, DecoData);
				demodushift = 0;
			}	
				
			else if( ModuFrame == 3)	
			{
				pModuData = Voltage2 + 2480;
				pADCModuData += 720;
				DecFlag = Receive(pADCModuData, DecoData);
				demodushift = 0;
			}	
				
			else if(ModuFrame == 4)
			{
				pModuData = Voltage2;
				pADCModuData += 720;
				DecFlag = Receive(pADCModuData, DecoData);		
				demodushift = 0;
			}	
	
		 	if(DecFlag)
  		 	{	
  		 		Speech_Decode_Frame();	
  				for(i=0; i<160; i++,pwmtestCount++)
     			{	     		     		
     				Voltage4[pwmtestCount] = ((synth[i]>>4) + 0x0800) & 0x0FFF;     				
       			}
       			DecFlag--;
       			demodushift += 103;
       			if(pwmtestCount == 320)
       				pwmtestCount = 0;       		
		 	}										
		}  		
	}
}

interrupt void  adc_isr(void)//adc中断以16k速率进入
{   	
	//输入语音采样8k
 //  	if(ConversionCount)                                 
  // 	{
   		Voltage1[ADCInputVoiceNum] = AdcRegs.ADCRESULT0;
   		ADCInputVoiceNum++;
   		TestCnt++;
   		if(TestCnt == 640)
			PwmoutStart = 1;
			
   		if(ADCInputVoiceNum == 160) 
		{
    		EncFlag = 1;
   		}	
    	else if(ADCInputVoiceNum == 320) 
		{
   		 	EncFlag = 1;
   		}
   		else if(ADCInputVoiceNum == 480)
   		{
   			ADCInputVoiceNum = 0;
   			EncFlag = 1;
   		}	
   // }
   // ConversionCount = !ConversionCount;
   
  
    // Reinitialize for next ADC sequence
    AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1;         // Reset SEQ1
    AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;		// Clear INT SEQ1 bit
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;   // Acknowledge interrupt to PIE

    return;
}


interrupt void eva_cmp1_isr(void)                  //音频输出
{
	if(PwmoutStart)
	{
		if( Div2Flag)
		{
			EvaRegs.CMPR1 = Voltage4[PwmCount];
			PwmCount++;
			if(PwmCount == pwmtestCount)// if true, then buffer write conflict!
				asm(" ESTOP0");	
			if(PwmCount == 320)
  	   			PwmCount = 0;  	   	
		}
		
		if(Div2Flag == 1) 
			Div2Flag = 0;		
		else if(Div2Flag == 0) 
			Div2Flag = 1;
		else
			asm(" ESTOP0");
	}	
	
	
	EvaRegs.EVAIMRA.all = 0x0002;
    EvaRegs.EVAIFRA.all = 0x0002;
	
	// Acknowledge interrupt to recieve more interrupts from PIE group 2
	PieCtrlRegs.PIEACK.all = PIEACK_GROUP2;
	
	return;
}

/*
interrupt void evb_cmp4_isr(void)                //调制后数据输出
{
	if(PWMOFDMStart)
	{

		Voltage2[ModuDataOutNum] = ((Voltage2[ModuDataOutNum]>>4)+0x0800) & 0x0FFF;
		EvbRegs.CMPR4 = Voltage2[ModuDataOutNum];
    	ModuDataOutNum++;
    	SampleDelay++;
    	if(SampleDelay == 9600)
    		OFDMSampleStart = 1; //OFDM sample start
    	if( ModuDataOutNum == volt2flag )
    	{
    		ModuDataOutNum = 0;
   		}   	
   	}
   	
    EvbRegs.EVBIMRA.all = 0x0002;  
    EvbRegs.EVBIFRA.all = 0x0002;
	
	// Acknowledge interrupt to recieve more interrupts from PIE group 2
	PieCtrlRegs.PIEACK.all = PIEACK_GROUP4;   
	
	return;
}
*/