1、精選優(yōu)質(zhì)文檔-傾情為你奉上#include "DSP28x_Project.h" / Device Headerfile and Examples Include File#include "math.h" #define FIRNUMBER 25#define SIGNAL1F 1000#define SIGNAL2F 4500#define SAMPLEF 10000#define PI 3.float InputWave();float FIR();float fHnFIRNUMBER= 0.0,0.0,0.001,-0.002,-0.002,0.

2、01,-0.009, -0.018,0.049,-0.02,0.11,0.28,0.64,0.28, -0.11,-0.02,0.049,-0.018,-0.009,0.01, -0.002,-0.002,0.001,0.0,0.0 ;float fXnFIRNUMBER= 0.0 ;float fInput,fOutput;float fSignal1,fSignal2;float fStepSignal1,fStepSignal2;float f2PI;int i;float fIn256,fOut256;int nIn,nOut;void main(void) nIn=0; nOut=0

3、; f2PI=2*PI; fSignal1=0.0; fSignal2=PI*0.1; fStepSignal1=2*PI/30; fStepSignal2=2*PI*1.4; / Step 1. Initialize System Control:/ PLL, WatchDog, enable Peripheral Clocks/ This example function is found in the DSP2833x_SysCtrl.c file. InitSysCtrl();/ Step 2. Initalize GPIO:/ This example function is fou

4、nd in the DSP2833x_Gpio.c file and/ illustrates how to set the GPIO to it's default state. / InitGpio(); Skipped for this example/ Step 3. Clear all interrupts and initialize PIE vector table:/ Disable CPU interrupts DINT;/ Initialize PIE control registers to their default state./ The default st

5、ate is all PIE interrupts disabled and flags/ are cleared./ This function is found in the DSP2833x_PieCtrl.c file. InitPieCtrl();/ Disable CPU interrupts and clear all CPU interrupt flags: IER = 0x0000; IFR = 0x0000;/ Initialize the PIE vector table with pointers to the shell Interrupt/ Service Rout

6、ines (ISR)./ This will populate the entire table, even if the interrupt/ is not used in this example. This is useful for debug purposes./ The shell ISR routines are found in DSP2833x_DefaultIsr.c./ This function is found in DSP2833x_PieVect.c. InitPieVectTable();/ Step 4. while(1)fInput=InputWave();

7、fInnIn=fInput;nIn+; nIn%=256;fOutput=FIR();fOutnOut=fOutput;nOut+;if ( nOut>=256 )nOut=0;/* 請(qǐng)?jiān)诖司渖显O(shè)置軟件斷點(diǎn) */float InputWave()for ( i=FIRNUMBER-1;i>0;i- )fXni=fXni-1;fXn0=sin(fSignal1)+cos(fSignal2)/6.0;fSignal1+=fStepSignal1; if ( fSignal1>=f2PI )fSignal1-=f2PI;fSignal2+=fStepSignal2;if ( fSignal2>=f2PI )fSignal2-=f2P