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#include"stdio.h" #include"math.h" #include"DSP28_Device.h" #defineorder 26 #defineN 128 #definepi 3.1415926 floatFIR_LPF[order] ={-1.52864422149721e-05,-0.000133359311426970,-0.000544636220343477,-0.00137835208978255,-0.00218948983490142,-0.00124340086554490,0.00478134865608317,0.0198838342801837,0.0464361812966399,0.0825102845162328,0.120763491355644,0.150360916315540,0.161536936687780,0.150360916315540,0.120763491355644,0.0825102845162328,0.0464361812966399,0.0198838342801837,0.00478134865608317,-0.00124340086554490,-0.00218948983490142,-0.00137835208978255,-0.000544636220343477,-0.000133359311426970,-1.52864422149721e-05}; floats; inti,n; floatinput[N],output[N]; intfs=10000; intf1=600; intf2=1500; #definefa 2*pi*f1/fs #definefb 2*pi*f2/fs void inputwave() { for(n=0;n<N;n++ ) input[n]=sin(fa*n)+sin(fb*n); } voidmain() { int m=0,n=0; inputwave(); for(n=0;n<N+order;n++) { for(s=0,m=0;(m<order)&&(m<n);m++) { s=FIR_LPF[m]*input[n-m]+s; } output[n]=s;} while(1);
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