DSP28 fir低通滤波器的设计源码

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1. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#include"stdio.h"</span>
   
2. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#include"math.h"</span>
   
3. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#include"DSP28_Device.h"</span>
   
4. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#defineorder 26</span>
   
5. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#defineN  128         </span>
   
6. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#definepi 3.1415926</span>
   
7. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">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};</span>
   
8. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">floats;</span>
   
9. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">inti,n;</span>
   
10. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">floatinput[N],output[N];  </span>
    
11. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">intfs=10000;   </span>
    
12. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">intf1=600;   </span>
    
13. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">intf2=1500;</span>
    
14. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#definefa 2*pi*f1/fs</span>
    
15. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">#definefb 2*pi*f2/fs</span>
    
16. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">void inputwave()</span>
    
17. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">{</span>
    
18. <span style="color: rgb(51, 51, 51); font-family: " microsoft="" yahei";"="">    for(n=0;n</span><n;n++ )
    
19. input[n]=sin(fa*n)+sin(fb*n);
    
20. }
    
21. voidmain()
    
22. {   int m=0,n=0;
    
23.     inputwave();           
    
24. for(n=0;n<n+order;n++)
    
25. {
    
26.   for(s=0,m=0;(m<order)&&(m<n);m++)
    
27. {
    
28.    s=FIR_LPF[m]*input[n-m]+s;
    
29. }
    
30.         output[n]=s;}
    
31. while(1);  </order)&&(m<n);m++)
    
32. </n+order;n++)
    
33. </n;n++>

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DSP28 fir低通滤波器的设计源码