标题: 基于单片机的DA0832低频信号发生器 仿真+程序 [打印本页]
作者: 北方先生    时间: 2016-6-27 21:16
标题: 基于单片机的DA0832低频信号发生器 仿真+程序
希望对新学者有所帮助


低频信号发生器仿真原理图

DA0832低频信号发生器单片机程序：
  1. #include <reg52.h>
  2. #include <absacc.h>

  4. #define uchar unsigned char
  5. #define DA0832 XBYTE[0xffff]

  7. uchar code tab[13]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39};
  8. uchar code num [93]={0,0,1,0,3,0,0,2,9,0,2,8,0,2,7,0,2,6,
  9. 0,2,5,0,2,4,0,2,3,0,2,2,0,2,1,0,2,0,0,1,9,0,1,8,0,1,7,0,1,6,0,1,5,0,1,4,0,1,3,
  10. 0,1,2,0,1,1,0,1,0,0,0,9,0,0,8,0,0,7,0,0,6,0,0,5,0,0,4,0,0,3,0,0,2,0,0,1};
  11. uchar code tosin[256]={0x7F,0x82,0x85,0x88,0x8B,0x8F,0x92,0x95,0x98,0x9B,0x9E,0xA1,0xA4,0xA7,0xAA,0xAD
  12. ,0xB0,0xB3,0xB6,0xB8,0xBB,0xBE,0xC1,0xC3,0xC6,0xC8,0xCB,0xCD,0xD0,0xD2,0xD5,0xD7
  13. ,0xD9,0xDB,0xDD,0xE0,0xE2,0xE4,0xE5,0xE7,0xE9,0xEB,0xEC,0xEE,0xEF,0xF1,0xF2,0xF4
  14. ,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFB,0xFC,0xFD,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE
  15. ,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFD,0xFD,0xFC,0xFB,0xFB,0xFA,0xF9,0xF8,0xF7,0xF6
  16. ,0xF5,0xF4,0xF2,0xF1,0xEF,0xEE,0xEC,0xEB,0xE9,0xE7,0xE5,0xE4,0xE2,0xE0,0xDD,0xDB
  17. ,0xD9,0xD7,0xD5,0xD2,0xD0,0xCD,0xCB,0xC8,0xC6,0xC3,0xC1,0xBE,0xBB,0xB8,0xB6,0xB3
  18. ,0xB0,0xAD,0xAA,0xA7,0xA4,0xA1,0x9E,0x9B,0x98,0x95,0x92,0x8F,0x8B,0x88,0x85,0x82
  19. ,0x7F,0x7C,0x79,0x76,0x73,0x6F,0x6C,0x69,0x66,0x63,0x60,0x5D,0x5A,0x57,0x54,0x51
  20. ,0x4E,0x4B,0x48,0x46,0x43,0x40,0x3D,0x3B,0x38,0x36,0x33,0x31,0x2E,0x2C,0x29,0x27
  21. ,0x25,0x23,0x21,0x1E,0x1C,0x1A,0x19,0x17,0x15,0x13,0x12,0x10,0x0F,0x0D,0x0C,0x0A
  22. ,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00
  23. ,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x05,0x06,0x07,0x08
  24. ,0x09,0x0A,0x0C,0x0D,0x0F,0x10,0x12,0x13,0x15,0x17,0x19,0x1A,0x1C,0x1E,0x21,0x23
  25. ,0x25,0x27,0x29,0x2C,0x2E,0x31,0x33,0x36,0x38,0x3B,0x3D,0x40,0x43,0x46,0x48,0x4B
  26. ,0x4E,0x51,0x54,0x57,0x5A,0x5D,0x60,0x63,0x66,0x69,0x6C,0x6F,0x73,0x76,0x79,0x7C};

  28. uchar fun=1,b=0,c=0,d=0,e=0,tl,th,flag=0;

  30. sbit  P3_0=P3^0;
  31. sbit  P3_1=P3^1;
  32. sbit  P3_2=P3^2;
  33. sbit  P2_7=P2^7;

  35. uchar de1,de2;
  36. uchar A=3;

  38. void key1(void);
  39. void key2(void);
  40. void key3(void);

  42. void delay(uchar k);

  44. void main(void)
  45. {
  46. TMOD=0X01;
  47. th=0xff;
  48. tl=0x1e;
  49. TH0=th;
  50. TL0=tl;
  51. ET0=1;
  52. EA=1;
  53. EX1=1;
  54. PX1=1;
  55. IT1=1;
  56. TR0=1;
  57. while(1)
  58. {  
  59. P3_0=0; P3_1=1;  P3_2=0;
  60. if(num[flag*3]!=0)
  61. {
  62. P1=tab[num[flag*3]];
  63. delay(0.01);
  64. }
  65. else{
  66. P1=0;
  67. P3_0=1;
  68. P3_1=0;  
  69. P3_2=0;
  70. P1=tab[num[flag*3+1]];
  71. delay(0.01);
  72. P1=0;
  73. P3_0=0; P3_1=0;  P3_2=0;
  74. P1=tab[num[flag*3+2]];
  75. delay(0.01);
  76. P1=0;
  77. P3_0=1; P3_1=1;  P3_2=0;
  78. P1=tab[fun+9];
  79. delay(0.01);
  80. P1=0;
  81.   }
  82.   }
  83. }

  85. void  delay(uchar k)   //延时程序
  86. {
  87. for(de1=0;de1<10;de1++)
  88.      for(de2=0;de2<k;de2++){;}
  89. }

  91. void key1(void)             //１键选择发波类型,1为正弦波,2为三角波,3为方波
  92. {
  93. fun++;
  94. if(fun==4)
  95.         fun=0x01;          
  96. }

  98. void key2(void)            //２键加大频率
  99. {
  100.         tl+=0x00;
  101.         if(tl>0x1e)
  102.         tl=0x01;
  103.         if(flag>0)
  104.         flag--;
  105.         else               
  106.         flag=30;
  107. }

  109. void key3(void)           //３键减小频率
  110. {
  111.         if(th>0x00)
  112.         {       
  113.                 th-=0x1;       
  114.                 if(flag<30)       
  115.                 flag++;       
  116.                 else         
  117.                 flag=0;       
  118.         }
  119. }



  123. void time0_int(void) interrupt 1   //中断服务程序
  124. {
  125.        TR0=0;
  126.        if(fun==1)
  127.        {
  128.                DA0832=tosin[b]/4*A;              //正弦波
  129.                    delay(flag) ;
  130.                  
  131.                b++;
  132.        }
  133.        else if(fun==2)                   //三角波
  134.        {
  135.                if(c<128)
  136.                    {
  137.                    DA0832=c*2/4*A;
  138.                    delay(flag);
  139.                }
  140.                    else
  141.                    {
  142.                    DA0832=(255-c)*2/4*A;
  143.                    delay(flag);
  144.              
  145.                    }
  146.                    c++;
  147.        }

  149.        else if(fun==3)                   // 方波
  150.        {
  151.                d++;
  152.                if(d<=128)
  153.                    {
  154.                    DA0832=0x00;
  155.                        delay(flag);
  156.                    }
  157.                    else
  158.                    {
  159.                     DA0832=0xff/4*A;
  160.                           delay(flag);
  161.                    }
  162.            }
  163.                 TH0=th;
  164.                 TL0=tl;
  165.                 TR0=1;
  166. }

  168. void  int1 (void) interrupt 2       //int1中断服务程序

  170. {
  171.    if(P2!=0xff)
  172.          delay(flag);
  173.         if(P2==0xff)
  174.         return;
  175.    if(P2==0xef) key1();
  176.    if(P2==0xdf) key2();
  177.    if(P2==0xbf) key3();

  179. }
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