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基于c51的波形发生器分享(代码，加proteus仿真图源文件)

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ID:665861 发表于 2020-4-4 09:49 | 显示全部楼层 |阅读模式
通过中断按钮控制不同波形的输出

proteus仿真图（未加晶振）

proteus仿真图（未加晶振）

单片机代码如下：
//main部分
  1. #include "dac0862.h"
  2. void main()
  3. {
  4. init_dac0862();
  5. initial_int1();
  6. while(1)
  7. {
  8.   disp();
  9. }
  10. }
复制代码

//dac0862.c部分
  1. #include "dac0862.h"
  2. sbit sin = P1^0;//正弦波
  3. sbit squ = P1^1;//方波
  4. sbit tri = P1^2;//三角波
  5. sbit tra = P1^3;//梯形波
  6. sbit saw = P1^4;//锯齿波
  7. sbit cs0832 = P3^2;
  8. sbit wr = P3^6;
  9. u8 key = 0;//模式状态
  10. unsigned char const code
  11. SIN_code[256]={0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,
  12. 0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8,0xda,0xdc,0xde,
  13. 0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf4,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,
  14. 0xfc,0xfc,0xfd,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,
  15. 0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea,0xe8,0xe6,0xe4,
  16. 0xe3,0xe1,0xde,0xdc,0xda,0xd8,0xd6,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,
  17. 0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,0x96,0x92,0x8f,0x8c,0x89,0x86,0x83,0x80,0x7d,
  18. 0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x64,0x61,0x5e,0x5b,0x58,0x55,0x52,0x4f,0x4c,0x49,0x46,0x43,
  19. 0x41,0x3e,0x3b,0x39,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,
  20. 0x15,0x14,0x12,0x10,0xf,0xd,0xc,0xb,0x9,0x8,0x7,0x6,0x5,0x4,0x3,0x3,0x2,0x1,0x1,0x0,0x0,0x0,0x0,
  21. 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x1,0x1,0x2,0x3,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xc,0xd,0xe,0x10,0x12,
  22. 0x13,0x15,0x17,0x18,0x1a,0x1c,0x1e,0x20,0x23,0x25,0x27,0x29,0x2c,0x2e,0x30,0x33,0x35,0x38,0x3b,
  23. 0x3d,0x40,0x43,0x46,0x48,0x4b,0x4e,0x51,0x54,0x57,0x5a,0x5d,0x60,0x63,0x66,0x69,0x6c,0x6f,0x73,
  24. 0x76,0x79,0x7c};

  26. void delay(uint x)
  27. {
  28. uint i,j;
  29. for(i = 0;i < x;i++)
  30. {
  31.   for(j = 0;j < 110;j++)
  32.   ;
  33. }
  34. }

  36. void init_dac0862()//选中芯片初始化
  37. {
  38. cs0832 = 0;
  39. wr = 0;
  40. }
  41. void sin_out()//输出正弦波
  42. {
  43. uint i = 0;
  44. while(i < 256)
  45. {
  46.   P2 = SIN_code[i];
  47.   i++;
  48. }
  49. }
  50. void squ_out()//输出方波
  51. {
  52. P2 = 0xff;
  53. delay(100);
  54. P2 = 0x00;
  55. delay(100);
  56. }
  57. void tri_out()//输出三角波
  58. {
  59. uint i = 0x00;
  60. while(i < 0xff)
  61. {
  62.   P2 = i;
  63.   i = i + 0x01;
  64. }
  65. while(i > 0x00)
  66. {
  67.   P2 = i;
  68.   i = i - 0x01;
  69. }
  70. }
  71. void tra_out()//输出梯形波
  72. {
  73. uint i = 0x00;
  74. while(i < 0xff)
  75. {
  76.   P2 = i;
  77.   i = i + 0x01;
  78. }
  79. delay(30);
  80. while(i > 0x00)
  81. {
  82.   P2 = i;
  83.   i = i - 0x01;
  84. }
  85. delay(30);
  86. }
  87. void saw_out()//输出锯齿波
  88. {
  89. uint i = 0x00;
  90. while(i < 0xff)
  91. {
  92.   P2 = i;
  93.   i = i + 0x01;
  94. }
  95. i = 0;
  96. }
  97. void initial_int1()//外部中断1初始化
  98. {
  99. IT1 = 1;
  100. EX1 = 1;
  101. EA = 1;
  102. }
  103. void int1_serv() interrupt 2
  104. {
  105. //无按钮按下则不显示波形
  106. if(sin == 0)
  107.   key = 1;
  108. else if(squ == 0)
  109.   key = 2;
  110. else if(tri == 0)
  111.   key = 3;
  112. else if(tra == 0)
  113.   key = 4;
  114. else if(saw == 0)
  115.   key = 5;
  116. }
  117. void disp()
  118. {
  119. //模式0，无按钮按下则不显示波形
  120. if(key == 1)//模式1，正弦波
  121.   sin_out();
  122. else if(key == 2)//模式2，方波
  123.   squ_out();
  124. else if(key == 3)//模式3，三角波
  125.   tri_out();
  126. else if(key == 4)//模式4，梯形波
  127.   tra_out();
  128. else if(key == 5)//模式5，锯齿波
  129.   saw_out();
  130. }
复制代码


//dac0862.h部分
#ifndef __DAC0862_H__
#define __DAC0862_H__
#include <reg51.h>
#define u8 unsigned char
#define uchar unsigned char
#define uint unsigned int

void delay(uint x);
void init_dac0862();//选中芯片初始化
void sin_out();//输出正弦波
void squ_out();//输出方波
void tri_out();//输出三角波
void tra_out();//输出梯形波
void saw_out();//输出锯齿波
void initial_int1();//外部中断1初始化
void disp();
#endif

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波形发生器.zip (89.39 KB, 下载次数: 36)

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