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標題: 基于51單片機制作的低頻正弦信號發生器Proteus仿真程序 [打印本頁]
作者: 3112996265    時間: 2024-5-22 10:49
標題: 基于51單片機制作的低頻正弦信號發生器Proteus仿真程序
其控制核心是51系列單片機AT89C51，能產生14~44Hz的低頻正弦信號，可作為電子測量中的低頻信號源
附件里面包含源代碼文件，原理圖文件，希望能幫到大家

仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）


單片機源程序如下:
  1. #include <intrins.h>
  2. #include <reg51.h>
  3. #include <math.h>
  4. typedef unsigned char Uchar;
  5. typedef unsigned int Uint;
  6. #define Segport P1
  7. #define DAport P2
  8. #define NOP _nop_()

  10. sbit DA0832wr = P3^7;
  11. Uchar FreqcValue = 30;
  12. Uchar code DAdata[] = {0x08,0x83,0x85,0x88,0x8A,0x8D,0x8F,0x92,
  13. 0x94,0x97,0x99,0x9B,0x9E,0xA0,0xA3,0xA5,
  14. 0xA7,0xAA,0xAC,0xAE,0xB1,0xB3,0xB5,0xB7,
  15. 0xB9,0xBB,0xBD,0xBF,0xC1,0xC3,0xC5,0xC7,
  16. 0xC9,0xCB,0xCC,0xCE,0xD0,0xD1,0xD3,0xD4,
  17. 0xD6,0xD7,0xD8,0xDA,0xDB,0xDC,0xDD,0xDE,
  18. 0xDF,0xE0,0xE1,0xE2,0xE3,0xE3,0xE4,0xE4,
  19. 0xE5,0xE5,0xE6,0xE6,0xE7,0xE7,0xE7,0xE7,
  20. 0xE7,0xE7,0xE7,0xE7,0xE6,0xE6,0xE5,0xE5,
  21. 0xE4,0xE4,0xE3,0xE3,0xE2,0xE1,0xE0,0xDF,

  23. 0xDE,0xDD,0xDC,0xDB,0xDA,0xD8,0xD7,0xD6,
  24. 0xD4,0xD3,0xD1,0xD0,0xCE,0xCC,0xCB,0xC9,
  25. 0xC7,0xC5,0xC3,0xC1,0xBF,0xBD,0xBB,0xB9,
  26. 0xB7,0xB5,0xB3,0xB1,0xAE,0xAC,0xAA,0xA7,
  27. 0xA5,0xA3,0xA0,0x9E,0x9B,0x99,0x97,0x94,
  28. 0x92,0x8F,0x8D,0x8A,0x88,0x85,0x83,0x80,
  29. 0x7D,0x7B,0x78,0x76,0x73,0x71,0x6E,0x6C,
  30. 0x69,0x67,0x65,0x62,0x60,0x5D,0x5B,0x59,
  31. 0x56,0x54,0x52,0x4F,0x4D,0x4B,0x49,0x47,
  32. 0x45,0x43,0x41,0x3F,0x3D,0x3B,0x39,0x37,

  34. 0x35,0x34,0x32,0x30,0x2F,0x2D,0x2C,0x2A,
  35. 0x29,0x28,0x26,0x25,0x24,0x23,0x22,0x21,
  36. 0x20,0x1F,0x1E,0x1D,0x1D,0x1C,0x1C,0x1B,
  37. 0x1B,0x1A,0x1A,0x1A,0x19,0x19,0x19,0x19,
  38. 0x19,0x19,0x19,0x19,0x1A,0x1A,0x1A,0x1B,
  39. 0x1B,0x1C,0x1C,0x1D,0x1D,0x1E,0x1F,0x20,
  40. 0x21,0x22,0x23,0x24,0x25,0x26,0x28,0x29,
  41. 0x2A,0x2C,0x2D,0x2F,0x30,0x32,0x33,0x35,
  42. 0x37,0x39,0x3B,0x3D,0x3F,0x41,0x43,0x45,
  43. 0x47,0x49,0x4B,0x4D,0x4F,0x52,0x54,0x56,

  45. 0x59,0x5B,0x5D,0x60,0x62,0x65,0x67,0x69,
  46. 0x6C,0x6E,0x71,0x73,0x76,0x78,0x7B,0x7D

  48. };
  49. void dlay();

  51. void T0f(void) interrupt 1
  52. {
  53.     static Uchar i;
  54.     P2 = DAdata[i++];

  56.     DA0832wr = 1;
  57.     NOP; NOP;

  59.     DA0832wr = 0;
  60. }
  61. void main()
  62. {
  63.     Uchar keyValue;
  64.     float tmp;
  65.     P3 = 0xFF;
  66.     P1 = 0xff;
  67.     TMOD = 0x02; //    ö ʱ  ģʽ
  68.     IE = 0x82;
  69.     dlay();
  70.     while (1)
  71.     {
  72.         P1 = ((FreqcValue / 10) << 4) | (FreqcValue % 10);
  73.         keyValue = P3 & 0x7f;
  74.         switch (keyValue)
  75.         {
  76.         case 0x7b:
  77.             dlay();
  78.             do
  79.             {
  80.                 keyValue = P3 & 0x7f;
  81.             } while (keyValue == 0x7b);
  82.             if (FreqcValue < 44)
  83.                 FreqcValue++;
  84.             break;
  85.         case 0x77:
  86.             dlay();
  87.             do
  88.             {
  89.                 keyValue = P3 & 0x7f;
  90.             } while (keyValue == 0x77);
  91.             if (FreqcValue > 14)
  92.                 FreqcValue--;
  93.             break;
  94.         case 0x3f:
  95.             dlay();
  96.             do
  97.             {
  98.                 keyValue = P3 & 0x7f;
  99.             } while (keyValue == 0x3f);
  100.             tmp = 256 - 3600 / FreqcValue;
  101.             TH0 = tmp;
  102.             TL0 = tmp;
  103.             TR0 = 1;
  104.             break;
  105.         }
  106.     }
  107. }
  108. void dlay()
  109. {
  110.     Uchar i, j;
  111.     for (i = 0; i < 20; i++)
  112.         for (j = 0; j < 255; j++)
  113.         {
  114.             ;
  115.         }
  116. }
復制代碼

Proteus8.13仿真和程序2個文件下載: 仿真程序.7z (92.53 KB, 下載次數: 9)




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