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標(biāo)題: 單片機(jī)+DAC0832產(chǎn)生正玄波，鋸齒波，頻率占空比可調(diào)的矩形波 [打印本頁(yè)]
作者: tutuwxy2    時(shí)間: 2018-10-24 00:09
標(biāo)題: 單片機(jī)+DAC0832產(chǎn)生正玄波，鋸齒波，頻率占空比可調(diào)的矩形波
正玄波，鋸齒波，頻率占空比可調(diào)的矩形波。
C語(yǔ)言源程序+protues仿真


單片機(jī)源程序如下:
  1. //DA convertion
  2. //2018/9/24
  3. //Wang XY
  4. #include<reg52.h>
  5. #define unit   unsigned int
  6. #define uchar  unsigned        char
  7. sbit key0=P1^0;
  8. sbit key1=P1^1;
  9. sbit key2=P1^2;
  10. /***********************************************************************************/
  11. uchar code sin_tab[]={
  12. 0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,
  13. 0xa5,0xa8,0xab,0xae,0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,
  14. 0xc7,0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8,0xda,0xdc,0xde,0xe0,
  15. 0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf4,
  16. 0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,0xfe,0xfe,0xff,//sin 1/4
  17. 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,
  18. 0xfd,0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf3,0xf2,
  19. 0xf0,0xef,0xed,0xec,0xea,0xe8,0xe6,0xe4,0xe3,0xe1,0xde,0xdc,
  20. 0xda,0xd8,0xd6,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,
  21. 0xbc,0xb9,0xb6,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,
  22. 0x99,0x96,0x92,0x8f,0x8c,0x89,0x86,0x83,0x80,0x7d,0x79,0x76,
  23. 0x73,0x70,0x6d,0x6a,0x67,0x64,0x61,0x5e,0x5b,0x58,0x55,0x52,
  24. 0x4f,0x4c,0x49,0x46,0x43,0x41,0x3e,0x3b,0x39,0x36,0x33,0x31,
  25. 0x2e,0x2c,0x2a,0x27,0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,
  26. 0x15,0x14,0x12,0x10,0xf,0xd,0xc,0xb,0x9,0x8,0x7,0x6,0x5,0x4,
  27. 0x3,0x3,0x2,0x1,0x1,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,//sin 1/2
  28. 0x0,0x1,0x1,0x2,0x3,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xc,0xd,
  29. 0xe,0x10,0x12,0x13,0x15,0x17,0x18,0x1a,0x1c,0x1e,0x20,0x23,
  30. 0x25,0x27,0x29,0x2c,0x2e,0x30,0x33,0x35,0x38,0x3b,0x3d,0x40,
  31. 0x43,0x46,0x48,0x4b,0x4e,0x51,0x54,0x57,0x5a,0x5d,0x60,0x63,
  32. 0x66,0x69,0x6c,0x6f,0x73,0x76,0x79,0x7c};
  33. /*********************************************************************/
  34. void DELAY(unit n)
  35. {
  36.    while(n!=0)
  37.    n--;
  38. }
  39. /********************************************/
  40. void SAWTOOTH_WAVE(float m,float n,float u)                  //整形形參，傳遞占空比小于等于100（默認(rèn)百分之）和頻率以及單位
  41. {
  42.   float h,l;
  43.   while(1)
  44.   {
  45.    if(key0)
  46.    {
  47.      if(u==1)                                  //HZ
  48.          {
  49.            h=10000*m*(1/n);                                   //  T=1/n    h=(m/100)*T
  50.            l=10000*(100-m)*(1/n);
  51.          }
  52.          if(u==2)                                                  //khz
  53.          {
  54.            h=10*m*(1/n);
  55.            l=10*(100-m)*(1/n);
  56.          }
  57.          if(u==3)                                       //mhz
  58.          {
  59.            h=(m/100)*(1/n);
  60.            l=((100-m)/100)*(1/n);
  61.          }
  62.          P2=0x00;
  63.      DELAY(h);
  64.      P2=0xff;
  65.      DELAY(l);
  66.     }
  67.    else break;
  68.   }
  69. }
  70. /*********************************/
  71. void TRIANGLE_WAVE()
  72. {
  73.   uchar i=0;
  74.   while(1)
  75.   {
  76.     if(key1)
  77.     {
  78.      for(;i<255;i++)
  79.           P2=i;                                                                //down                                                                                 
  80.      for(;i>0;i--)
  81.           P2=i;                                                                   //up
  82.     }                                                                   //f=1/T=1/256*2us≈2khz
  83.         else break;
  84.   }
  85. }
  86. /*******************************/
  87. void SIN_WAVE()  
  88. {
  89.   unit i;
  90.   while(1)
  91.   {
  92.     if(key2)
  93.     {
  94.       for(i=0;i<256;i++)
  95.           P2=sin_tab[i];
  96.     }
  97.     else break;
  98.   }
  99. }
  100. /********************************/
  101. void main()
  102. {
  103.   while(1)
  104.   {
  105.     SAWTOOTH_WAVE(10,2,2);
  106.     TRIANGLE_WAVE();
  107.     SIN_WAVE();
  108.   }
  109. }
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