adc_pwm_done.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 "newamr3.h"
//#include "new3.h"
//#include "200ms.h"

interrupt void eva_cmp3_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
int  Voltage3[3500];                                 //调制后的数据接收 
int 	Voltage4[1600];                                  //音频输出

int    *pModuData = Voltage2;
int    *pADCModuData = Voltage3;                       //指示待调制数据
int    ModuFrame;
//int    ModuPreFrame = 5;
//int    DemoduFrame;                                    //解调的帧数 
extern int demodushift;

int16 OFDM_frame = 0;

//extern int DataBuffer[];
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;
Uint16 BitConv = 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.CMP3INT  = &eva_cmp3_isr;
	PieVectTable.CMP4INT  = &evb_cmp4_isr;
	EDIS;
	
   // Configure ADC
    AdcRegs.ADCMAXCONV.all = 0x0001;       // Setup 2 conv's on SEQ1
    AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0000; // Setup ADCINA0 as 1st SEQ1 conv.
    AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x0003; // 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)       

    // Configure EVA
	EvaRegs.EVAIMRA.all = 0x0008;
    EvaRegs.EVAIFRA.all = 0x0008;
    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;  
   
    EvaRegs.GPTCONA.bit.T2TOADC = 2;       // Enable EVASOC in EVA
	EvaRegs.T2CNT = 0x0000;   
    EvaRegs.T2PR =0x249F;                  // SOC 采样频率= HSPCLK/9375 = 16K
    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.CMPR3 = 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;      
   	
	PieCtrlRegs.PIEIFR1.all = 0;
	PieCtrlRegs.PIEIFR2.all = 0;
	PieCtrlRegs.PIEIFR4.all = 0;


	PieCtrlRegs.PIEIER1.bit.INTx6 = 1;//AD
	PieCtrlRegs.PIEIER2.bit.INTx3 = 1;//compare3 interrupt voice output
    PieCtrlRegs.PIEIER4.bit.INTx1 = 1;//compare4 interrupt OFDM signal output		
    	
	IER |= (M_INT1 | M_INT2 | M_INT4);	
	
	EINT;
	ERTM;	
      
    asm(" nop");
    asm(" nop");
    asm(" nop");    
    asm(" nop");    
    asm(" setc 	 ovm,sxm");    
    asm(" spm	 1");    
    
    load();
    initiate(); //编码初始化
    Speech_Decode_Frame_init();
    Init_RS();

	/*the variable used 
	for judging first OFDM frame in Transmit.c */     
  	OFDM_frame = 0;  
     
    demodushift = 0;
    TestCnt = 0;
    
       
    for(i=0;i<88;i++)
    	Voltage3[i] = 0x03FF;	

	
	//初始化参数
	PWMOFDMStart = 0;
	EncFlag = 0;     
    EncNum = 0;
    ModuFrame = -1;
    pModuData = Voltage2;
    
    /*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
		{
			EncFlag = 0; 			
			
			for(i=0; i<160; i++)
   			{
   				buffer3[i] = Voltage1[160*EncNum + i] - 0x89E0;   			
   			}	
   			
			if(++EncNum == 3)	//30帧
				EncNum = 0;
			
			asm(" setc 	 ovm,sxm");    
    		asm(" spm	 1");  	
		  						    
	  	 	codamr();                   //语音编码	   			   		
	
			
			//跟踪voltage2的OFDM数据块存储位置
			ModuFrame = RS_OFDM_Mod();
			
				if(ModuFrame == 1)
					pModuData = Voltage2 + 1040;
				else if(ModuFrame == 2 || ModuFrame == 3)
					pModuData += 720;
				else if(ModuFrame == 4)
					pModuData = Voltage2;								
	
			
		}

		//OFDM解调和语音解码		
		if(FrameSynFlag == 1 )                    	
		{			
			if(DemoduFlag == 1)
				asm(" ESTOP0");
				
			FrameSyn = FindFrame(Voltage3);
			volt3flag = FrameSyn + 864;
			pADCModuData = Voltage3 + FrameSyn;
			FrameSynFlag = 0;
		}
		
		if(DemoduFlag == 1)								
		{
			if(FrameSynFlag == 1)
				asm(" ESTOP0");
			
			DecFlag = Receive(pADCModuData, DecoData);
			DemoduFlag = 0;
			demodushift = 0;
			
			if(AdcFrame == 1)
			{
				pADCModuData += 864;
	    	}
	    	else if(AdcFrame == 2)
	    	{
	    		pADCModuData += 720;
	      	}
	    	else if(AdcFrame == 3)
	    	{
	    		pADCModuData += 720;
	    	}
  		}
 
  		while(DecFlag)
  		{
  			asm(" setc 	 ovm,sxm");    
    		asm(" spm	 1");  
  			Speech_Decode_Frame();	
  			asm(" setc 	 ovm,sxm");    
    		asm(" spm	 1");  
  			for(i=0; i<160; i++,pwmtestCount++)
     		{	
     			Voltage4[pwmtestCount] = ((synth[i]>>4) + 0x0800) & 0x0FFF;
     			if(pwmtestCount+1 == PwmCount)
     				asm(" ESTOP0");					
       		}
       		DecFlag--;
       		demodushift += 103;
       		if(pwmtestCount == 1600)
       			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 == 740) 
			PWMOFDMStart = 1;
   		if(ADCInputVoiceNum == 160) 
		{
    		EncFlag = 1;
   		}	
    	else if(ADCInputVoiceNum == 320) 
		{
   		 	EncFlag = 1;
   		}
   		else if(ADCInputVoiceNum == 480)
   		{
   			ADCInputVoiceNum = 0;
   			EncFlag = 1;
   		}	
    }
    ConversionCount = !ConversionCount;
   
   //调制数据输入的采样16k  	
    if(OFDMSampleStart)
    {
   		Voltage3[ADCModuDataNum] = AdcRegs.ADCRESULT1 - 0x8900; 
   		
   		if(AdcFrame == 3 && ADCModuDataNum == volt3flag - 88 + j)
		{
			Voltage3[j] = Voltage3[ADCModuDataNum];
			j++;
			if(j == 88) 
				j=0;				
		}			
		
   		ADCModuDataNum++;
   		
   		if (ADCModuDataNum == 1648)
   			PwmoutStart = 1;//start outputing voice
   			
   		if(AdcFrame==4 && ADCModuDataNum == 480)
   		{
   			FrameSynFlag = 1;
   			AdcFrame = 0;  
   		}
   		else if(AdcFrame==0 && ADCModuDataNum == volt3flag)
   		{
   			DemoduFlag = 1; 
   			AdcFrame++; //AdcFrame = 1
   			volt3flag += 720;
   		}
   		else if(AdcFrame==1 && ADCModuDataNum == volt3flag)
   		{   			
   			DemoduFlag = 1;
   			AdcFrame++;   //AdcFrame = 2
   			volt3flag += 720;
   			   			
   		}	
   		else if(AdcFrame==2 && ADCModuDataNum == volt3flag)
   		{
  			DemoduFlag = 1; 
   			AdcFrame++;  //AdcFrame = 3	
   			volt3flag += 720;
   		}
		else if(AdcFrame==3 && ADCModuDataNum == volt3flag)
   		{
  			DemoduFlag = 1; 
   			AdcFrame++; //AdcFrame = 4   						
   			ADCModuDataNum = 88;	
   		}  	
   		
   	}
   	
    // 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_cmp3_isr(void)                  //音频输出
{
	if(PwmoutStart)
	{
		if( Div2Flag)
		{
			EvaRegs.CMPR3 = Voltage4[PwmCount];
			PwmCount++;
			if(PwmCount == 1600)
  	   			PwmCount = 0;
  	   	
		}
		Div2Flag = !Div2Flag;
	}	
	
	
	EvaRegs.EVAIMRA.all = 0x0008;
    EvaRegs.EVAIFRA.all = 0x0008;	
	// 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)
	{
	
		//EvbRegs.CMPR4 = ((Voltage2[ModuDataOutNum]>>3)+0x1000) & 0x1FFF;
		EvbRegs.CMPR4 = ((Voltage2[ModuDataOutNum]>>3)+0x1000) & 0x1FFF;
		
    	ModuDataOutNum++;
    	SampleDelay++;
    	if(SampleDelay == 9600)
    		OFDMSampleStart = 1; //OFDM sample start
    	if( ModuDataOutNum == 3200 )
    	{
    		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;
}