DSP TMS320F2812 内部FLASH脱机运行测速程序

#include "DSP281x_Device.h" // DSP281x Headerfile Include File #include "DSP281x_Examples.h" // DSP281x Examples Include File /* for test fft */ #include "fft.h" #include"math.h" // Prototype statements for functions found within this file. interrupt void adc_isr(void); int FindMax(long a[],int length); void scia_loopback_init(void); void scia_fifo_init(void); void scia_xmit(int a); void error(int); void wait(int nWait); void SendString(char *String); //void InitForFFT(); void itoa (int n,char s[]); // Global variables used in this example: Uint16 LoopCount; Uint16 ConversionCount; Uint16 Voltage1[1024]; Uint16 MaxAdd=0; #define N 1024 //FFT Length #pragma DATA_SECTION(ipcb, "FFTipcb"); #pragma DATA_SECTION(mag,"FFTmag"); RFFT32 fft=RFFT32_1024P_DEFAULTS; long ipcb[N+2]; //In place computation buffer long mag[N/2+1]; //Magnitude buffer char cReceive,cBuffer[17]; //const long win[N/2]=HAMMING128; //Window coefficient array RFFT32_ACQ acq=FFTRACQ_DEFAULTS; //Instance the module main() { int i,Max; float Frequence,Speed; char ReceivedChar; int k=0; InitSysCtrl();//初始化cpu DINT;//关中断 InitPieCtrl();//初始化pie寄存器 /* Initialize acquisition module */ acq.buffptr=ipcb; acq.tempptr=ipcb; acq.size=N; acq.count=N; acq.acqflag=1; /* Initialize FFT module */ fft.ipcbptr=ipcb; fft.magptr=mag; fft.init(&fft); IER = 0x0000;//禁止所有的中断 IFR = 0x0000; InitPieVectTable();//初始化pie中断向量表 // Interrupts that are used in this example are re-mapped to // ISR functions found within this file. 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 AdcRegs.ADCTRL3.bit.ADCPWDN = 1; // Power up rest of 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 = 1; // Configure ADC AdcRegs.ADCMAXCONV.all = 0x0000; // 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 = 0x61a8; // Setup period register EvaRegs.T1PR=2500; //0.4us*EvaRegs.T1PR EvaRegs.GPTCONA.bit.T1TOADC = 1; // Enable EVASOC in EVA EvaRegs.T1CON.all = 0x1042; // Enable timer 1 compare (upcount mode) EALLOW; GpioMuxRegs.GPFMUX.all=0x0030; // Select GPIOs to be Sci pins // Port F MUX - x000 0000 0011 0000 EDIS; scia_fifo_init(); // Initialize the SCI FIFO scia_loopback_init(); // Initalize SCI for digital loop back // Note: Autobaud lock is not required for this example // Send a character starting with 0 // Step 6. Send Characters forever starting with 0x00 and going through // 0xFF. After sending each, check the recieve buffer for the correct value SendString("Hello DSP!"); // Wait for ADC interrupt while(1) { //LoopCount++; if (acq.acqflag==0) // If the samples are acquired { DINT; //RFFT32_brev(ipcb,ipcb,N); //RFFT32_brev(ipcb,ipcb,N); // Input samples in Real Part fft.calc(&fft); fft.split(&fft); fft.mag(&fft); for(i=0;i<N;i++) { mag[i]=sqrt(mag[i]); } acq.acqflag=1; // Enable the next acquisition Max=FindMax(mag,1024); Frequence=29.296875*MaxAdd;//可测量范围20-1500Hz // Max=Frequence; while(SciaRegs.SCIFFRX.bit.RXFIFST !=0) // 如果接受寄存器不为0则跳出 { ReceivedChar = SciaRegs.SCIRXBUF.all; cBuffer[k]=ReceivedChar; if ( ReceivedChar=='F') { cBuffer[k+1]='\0'; //nLen=k+1; SendString("FFT Frequency is:"); //bReceive=1; //break; itoa(Frequence,cBuffer); SendString(cBuffer); SendString("Hz"); //scia_xmit('\n'); } if ( ReceivedChar=='V') { cBuffer[k+1]='\0'; //nLen=k+1; SendString("The Speed is:"); //bReceive=1; //break; Speed=(Frequence*10.8)/483;//Fd*c/2f0 itoa(Speed,cBuffer); SendString(cBuffer); SendString("Km/h"); //scia_xmit('\n'); } k++; k%=16; } EINT; } } } interrupt void adc_isr(void) { Voltage1[ConversionCount] = AdcRegs.ADCRESULT0>>4; acq.input=((unsigned long)Voltage1[ConversionCount])<<16; acq.update(&acq); // ipcb[ConversionCount]=((unsigned long)Voltage1[ConversionCount])<<16; //Voltage2[ConversionCount] = AdcRegs.ADCRESULT1 >>4; // If 40 conversions have been logged, start over if(ConversionCount == 1023) { ConversionCount = 0; // acq.acqflag=0; } else 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; } int FindMax(long a[],int length) { int i,maxvalue=0; for (i=1;i<length;i++) { if (i==1) { maxvalue = a[i]; } else { if (maxvalue < a[i]) { maxvalue = a[i]; MaxAdd=i; } } } return maxvalue; } // Test 1,SCIA DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parity void scia_loopback_init() { // Note: Clocks were turned on to the SCIA peripheral // in the InitSysCtrl() function SciaRegs.SCICCR.all =0x0007; // 1 stop bit, No loopback // No parity,8 char bits, // async mode, idle-line protocol SciaRegs.SCICTL1.all =0x0003; // enable TX, RX, internal SCICLK, // Disable RX ERR, SLEEP, TXWAKE SciaRegs.SCICTL2.all =0x0003; SciaRegs.SCICTL2.bit.TXINTENA =1; SciaRegs.SCICTL2.bit.RXBKINTENA =1; SciaRegs.SCIHBAUD =0x0001; SciaRegs.SCILBAUD =0x00e7; SciaRegs.SCICCR.bit.LOOPBKENA =0; // disable loop back SciaRegs.SCICTL1.all =0x0023; // Relinquish SCI from Reset } // Transmit a character from the SCI' void scia_xmit(int a) { SciaRegs.SCITXBUF=a; } // Initalize the SCI FIFO void scia_fifo_init() { SciaRegs.SCIFFTX.all=0xE040; SciaRegs.SCIFFRX.all=0x204f; SciaRegs.SCIFFCT.all=0x0; } void wait(int nWait) { int i,j,k=0; for ( i=0;i<nWait;i++ ) for ( j=0;j<64;j++ ) k++; }