DSP实验程序.zip_CCS_DSP 实验_dsp实验_dsp的 程序

/*****************************************************************************/ /* Filename: agc_aduio.c */ /* Author:ZhangYong */ /* 2002-12 */ /*****************************************************************************/ #include "agc_face.h" #include "agc_func.h" int dIn,dOut; int Read_BSP1(void); void Write_BSP1(int); void Led_Light(void); int AGC_audio(int); // Main program void main() { init_board(); while (1) { dIn=Read_BSP1(); dOut=AGC_audio(dIn); Write_BSP1(dOut); Led_Light(); } } int Read_BSP1(void) { int dDataIn; *(volatile u16 *)SPSA_ADDR(1)=SPCR1_SUBADDR; //Receive Data from McBSP1 while(!((*(volatile u16 *)SPSD_ADDR(1)) & 0x0002)){}; dDataIn=*(volatile u16*)DRR1_ADDR(1); return dDataIn; } void Write_BSP1(int dDataOut) { *(volatile u16 *)SPSA_ADDR(1)=SPCR2_SUBADDR; //Transmit Data To McBSP1 while(!((*(volatile u16 *)SPSD_ADDR(1)) & 0x0002)){}; *(volatile u16 *)DXR1_ADDR(1)=dDataOut; } void Led_Light(void) { static int i=0; if(i>1024) { // *(int *)(0x0007)^=0x2000; *(volatile u16 *)reg_ST1 ^= 0x2000; //Every 1024 times XF changed i=0; } i++; } int AGC_audio(int AGC_in) { int AGC_out; static int dTime=0; static float AGC_Coff=1.0; static int maxAGC_in=0; static int maxArrIn=0; if(AGC_in>maxArrIn) maxArrIn=AGC_in; if(-1*AGC_in>maxArrIn) maxArrIn=-1*AGC_in; if(dTime>4096) { if(maxArrIn<maxAGC_in) maxAGC_in=maxArrIn; maxArrIn=0; dTime=0; } dTime++; if(AGC_in > maxAGC_in) { maxAGC_in=AGC_in; if(maxAGC_in>1) AGC_Coff=20000.0/maxAGC_in; } if((-1*AGC_in)>maxAGC_in) { maxAGC_in=-1*AGC_in; if(maxAGC_in>1) AGC_Coff=20000.0/maxAGC_in; } AGC_out=AGC_in*AGC_Coff; if(AGC_out>20000) AGC_out=20000; if(AGC_out<-20000) AGC_out=-20000; return AGC_out; }