標題: 基于單片機的波形發(fā)生器仿真設計 [打印本頁]
作者: 博客之路燒死你    時間: 2017-6-21 10:08
標題: 基于單片機的波形發(fā)生器仿真設計


單片機源程序如下:
  1.                  #include<reg52.h>
  2. #define  uchar unsigned char
  3. #define  uint  unsigned int
  4. #define DAdata  P0        //DA數(shù)據(jù)端口
  5. sbit DA_S1= P2^0;   // 控制DAC0832的8位輸入寄存器，僅當都為0時，可以輸出數(shù)據(jù)(處于直通狀態(tài))，否則，輸出將被鎖存
  6. sbit DA_S2= P2^1;   // 控制DAC0832的8位DAC寄存器，僅當都為0時，可以輸出數(shù)據(jù)(處于直通狀態(tài))，否則，輸出將被鎖存
  7. sbit key=   P3^2;
  8. uchar wavecount;    //'抽點'計數(shù)
  9. uchar THtemp,TLtemp;//傳遞頻率的中間變量
  10. uchar judge=1;      //在方波輸出函數(shù)中用于簡單判別作用
  11. uchar waveform;            //當其為0、1、2時，分別代表三種波
  12. uchar code freq_unit[3]={10,50,200}; //三種波的頻率單位
  13. uchar idata wavefreq[3]={1,1,1};           //給每種波定義一個數(shù)組單元，用于存放單位頻率的個數(shù)
  14. uchar code  lcd_hang1[]={"Sine Wave       " "Triangle Wave   " "Square Wave     " "Select Wave:    " "press No.1 key! "};
  15. uchar idata lcd_hang2[16]={"f=    Hz        "};
  16. uchar code waveTH[]={
  17.     0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
  18. 0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
  19. 0xec,0xf6,0xf9,0xfb,0xfc,0xfc,0xfd,0xfd,0xfd,0xfe};
  20. uchar code waveTL[]={
  21.     0x06,0x8a,0x10,0x4e,0x78,0x93,0xa8,0xb3,0xbe,0xc6, //正弦波頻率調整中間值
  22. 0xac,0xde,0x48,0x7a,0x99,0xaf,0xbb,0xc8,0xd0,0xde,        //三角波頻率調整中間值
  23. 0x88,0x50,0x90,0x32,0x34,0xbe,0x4a,0xa3,0xe5,0x2c};
  24. /*************************************************************************************************/
  25. uchar code triangle_tab[]={         //每隔數(shù)字8，采取一次
  26. 0x00,0x08,0x10,0x18,0x20,0x28,0x30,0x38,0x40,0x48,0x50,0x58,0x60,0x68,0x70,0x78,
  27. 0x80,0x88,0x90,0x98,0xa0,0xa8,0xb0,0xb8,0xc0,0xc8,0xd0,0xd8,0xe0,0xe8,0xf0,0xf8,0xff,
  28. 0xf8,0xf0,0xe8,0xe0,0xd8,0xd0,0xc8,0xc0,0xb8,0xb0,0xa8,0xa0,0x98,0x90,0x88,0x80,
  29. 0x78,0x70,0x68,0x60,0x58,0x50,0x48,0x40,0x38,0x30,0x28,0x20,0x18,0x10,0x08,0x00};
  30. uchar code sine_tab[256]={
  31. //輸出電壓從0到最大值（正弦波1/4部分）
  32. 0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,
  33. 0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,
  34. 0xee,0xef,0xf1,0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,
  35. //輸出電壓從最大值到0（正弦波1/4部分）
  36. 0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,
  37. 0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,
  38. 0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99 ,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,
  39. //輸出電壓從0到最小值（正弦波1/4部分）
  40. 0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,
  41. 0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16 ,0x15,0x13,
  42. 0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,
  43. //輸出電壓從最小值到0（正弦波1/4部分）
  44. 0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02 ,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,
  45. 0x11,0x13,0x15 ,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,
  46. 0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80};
  47. void delay(uchar z)          
  48. {
  49.     uint x,y;
  50. for(x=z;x>0;x--)
  51. for(y=110;y>0;y--);
  52. }
  53. void triangle_out()        //三角波輸出
  54. {
  55.     DAdata=triangle_tab[wavecount++];
  56. if(wavecount>64) wavecount=0;
  57. DA_S1=0;  //打開8位輸入寄存器
  58. DA_S1=1;  //關閉8位輸入寄存器
  59. }
  60. void sine_out()         //正弦波輸出
  61. {
  62.     DAdata=sine_tab[wavecount++];
  63. DA_S1=0;  //打開8位輸入寄存器
  64. DA_S1=1;  //關閉8位輸入寄存器
  65. }
  66. void square_out()  //方波輸出
  67. {
  68.     judge=~judge;
  69.     if(judge==1) DAdata=0xff;
  70. else  DAdata=0x00;
  71. DA_S1=0;  //打開8位輸入寄存器
  72. DA_S1=1;  //關閉8位輸入寄存器
  73. }
  74. /************1602液晶的相關函數(shù)*************/
  75. #define lcd_ports P1
  76. sbit rs=P2^2;
  77. sbit rw=P2^3;
  78. sbit lcden=P2^4;
  79. void write_com(uchar com)
  80. {
  81. rs=0;        //置零，表示寫指令
  82. lcden=0;
  83. lcd_ports=com;
  84. delay(5);
  85. lcden=1;
  86. delay(5);
  87. lcden=0;
  88. }
  89. void write_date(uchar date)
  90. {
  91. rs=1;        //置1，表示寫數(shù)據(jù)（在指令所指的地方寫數(shù)據(jù)）
  92. lcden=0;
  93. lcd_ports=date;
  94. delay(5);
  95. lcden=1;
  96. delay(5);
  97. lcden=0;
  98. }
  99. void disp_lcd(uchar addr,uchar *temp1)
  100. {
  101. uchar num;
  102. write_com(addr);
  103. delay(1);   //延時一會兒???
  104. for(num=0;num<16;num++)
  105. {
  106. write_date(temp1[num]);//或者這樣寫write_date(*(temp1+num));
  107. delay(1);
  108. }
  109. }
  110. void init_lcd()
  111. {
  112. //uchar num;
  113. lcden=0;  //可有可無???
  114. rw=0;  //初始化一定要設置為零，表示寫數(shù)據(jù)
  115. write_com(0x38);  //使液晶顯示點陣，為下面做準備
  116. write_com(0x0c);  //初始設置
  117. write_com(0x06);  //初始設置
  118. write_com(0x01);  //清零
  119. write_com(0x80);  //使指針指向第一行第一格
  120.     disp_lcd(0x80,&lcd_hang1[3*16]);  //在第一行顯示
  121.     disp_lcd(0xc0,&lcd_hang1[4*16]);  //在第二行顯示
  122. }
  123. /********************1602液晶函數(shù)聲明結束*********************/
  124. void main()
  125. {
  126.     uchar i=0;
  127. DA_S2=0;    //使DAC寄存器處于直通狀態(tài)
  128. DAdata=0;
  129. DA_S1=1;    //關閉8位輸入寄存器
  130. init_lcd();
  131.     waveform=0;
  132. TMOD=0x01;  //設置定時器0為16位工作方式
  133. IT0=1;      //設置外部中斷0為下降沿觸發(fā)
  134. ET0=1;      //開定時器中斷
  135. EX0=1;
  136. EA=1;
  137. while(1)
  138. {
  139. //DAout(0xff);           //可輸出TTL波形
  140. //DAout(0x80);
  141. //T_temp=32;
  142. }
  143. }         

  145. void timer0() interrupt 1
  146. {
  147. TH0=THtemp;
  148. TL0=TLtemp;
  149. if(waveform==0)      sine_out();
  150. else if(waveform==1) triangle_out();
  151. else if(waveform==2) square_out();
  152. }
  153. void key_int0() interrupt 0
  154. {
  155.     uchar keytemp;
  156. uint total_freq; //總頻率
  157. EA=0; TR0=0;     //關總中斷與定時器
  158. delay(5);       //延時夠嗎???
  159. if(key==0)       //確實有按鍵按下而引發(fā)中斷
  160. {
  161. keytemp=P3&0xf0; //獲取P3口高四位的值
  162. switch(keytemp)
  163. {
  164.     case 0xe0:        //選擇波形
  165.      waveform++;
  166. if(waveform>2) waveform=0;
  167. break;
  168.     case 0xd0:  //頻率按規(guī)定單位依次增加
  169.      wavefreq[waveform]++;
  170. if(wavefreq[waveform]>10) wavefreq[waveform]=1; // /*這邊要用“>10”，因為它比“=11”可靠
  171. break;         //   性更高,使加數(shù)有個上限，不會一直加下去*/
  172. ……………………

  174. …………限于本文篇幅 余下代碼請從51黑下載附件…………
復制代碼

所有資料51hei提供下載:
波形發(fā)生器.rar (665.38 KB, 下載次數(shù): 127)



作者: 唐磊    時間: 2017-11-7 23:55
受教了，感覺很好
作者: xuhaifeng215    時間: 2017-12-15 10:33
寫的很清晰。
作者: 愛吃排骨的ss    時間: 2017-12-18 19:28
感覺很不錯
作者: 張帥帥    時間: 2018-1-2 13:20
你好這個用的是哪個芯片呢？
作者: zengrong    時間: 2018-9-19 14:29
張帥帥 發(fā)表于 2018-1-2 13:20
**** 作者被禁止或刪除 內容自動屏蔽 ****

非常好謝謝
作者: qwerty.    時間: 2018-9-25 23:20
下載不了，能發(fā)一到郵箱嗎
作者: 法發(fā)順豐    時間: 2020-9-16 12:38
前面那個波形頻率的中間值是怎么得出來的啊



歡迎光臨 (http://www.torrancerestoration.com/bbs/) Powered by Discuz! X3.1