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標題: 單片機20Hz~20KHz頻率可調三種波形信號發生器Multisim仿真與代碼 [打印本頁]
作者: daigan    時間: 2018-12-3 21:22
標題: 單片機20Hz~20KHz頻率可調三種波形信號發生器Multisim仿真與代碼
20Hz~20KHz頻率可調三種波形信號發生器
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:

  2. #include <reg51.h>
  3. #include <intrins.h>
  4. #include<ABSACC.H>         
  5. #define uchar unsigned char
  6. #define  data_OUT  XBYTE[0x7FFF]
  7. char code dat[]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8
  8.                   ,0xab,0xae,0xb1,0xb4,0xb7,0xbc,0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,
  9. 0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xf1,
  10. 0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,
  11. 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,
  12. 0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,
  13. 0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,
  14. 0xc5,0xc2,0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x93,
  15. 0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,
  16. 0x63,0x60,0x5d,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,0x3d,0x3a,0x3a,0x38,
  17. 0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16,0x15,0x13,0x11,0x10,0x0e,
  18. 0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
  19. 0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,
  20. 0x0e,0x10,0x11,0x13,0x15,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,
  21. 0x57,0x5a,0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80};
  22. bit flag=0;
  23.   void delay(unsigned  int N)  
  24.   {
  25.   int i;
  26.   for(i=0;i<N;i++);
  27.   }

  29. void conversion_once_0832(unsigned char out_data)
  30.            {
  31.            data_OUT=out_data; //輸出數據
  32.            delay(10);         //延時等待轉換
  33.             }
  34. uchar  keyscan()
  35. {
  36. uchar key;
  37. if(P1!=0xff)
  38.   {
  39.    delay(61);
  40.    key=P1;
  41.    if(key!=0xff)
  42.     flag=~flag;
  43.     return(key);
  44.   }

  46. }
  47. void triangle()
  48. {
  49.   uchar k;
  50.   for(k=0;k<255;k++)
  51.     conversion_once_0832(k);
  52.   for(;k>0;k--)
  53.      conversion_once_0832(k);
  54. }
  55. void pulse()
  56. {
  57. conversion_once_0832(0xff);
  58. delay(1000);
  59. conversion_once_0832(0x00);
  60. delay(1000);

  62. }
  63. void fun3()
  64. {
  65.   uchar j;
  66.   for(j=0;j<255;j++)
  67.    conversion_once_0832(j);
  68. }
  69. void fun4()
  70. {
  71. uchar i;
  72. for(i=0;i<255;i++)
  73.    {
  74.     conversion_once_0832(dat[i]);
  75.    }
  76. }
  77. void main()
  78. {
  79. uchar temp;
  80. while(1)
  81.   {
  82.    temp=keyscan();
  83.    switch(temp)
  84.      {
  85.            case 0xfe:
  86.                      do{
  87.                                     triangle();
  88.                                         }while(keyscan()&&(flag==1));break;
  89.            case 0xfd: do{
  90.                                     pulse();
  91.                                         }while(keyscan()&&(flag==1));break;
  92.            case 0xfb: do{
  93.                                     fun3();
  94.                                         }while(keyscan()&&(flag==1));break;
  95.        case 0xf7: do{
  96.                                     fun4();
  97.                                         }while(keyscan()&&(flag==1));break;
  98.            default: break;
  99.          }
  100.   }

  102. }
  103.             
復制代碼

所有資料51hei提供下載:
波形發生器.zip (715 KB, 下載次數: 101)






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