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標題: 1602簡易信號強度指示 [打印本頁]
作者: wuxiandi    時間: 2015-4-10 01:29
標題: 1602簡易信號強度指示

  1. //----0---6格信號強度指示----
  2. #include <reg52.h>
  3. #include "stdio.h"


  6. #define u8 unsigned char
  7. #define u16 unsigned int

  9. #define DATA P2  

  11. sbit RS=P0^5;  
  12. sbit RW=P0^6;   
  13. sbit EN=P0^7;   
  14. u8 code font[8]={0x04,0x0e,0x15,0x04,0x04,0x04,0x04,0x00};     

  16. u8 code sign_font[7][8]={{0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00},   
  17.                          {0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x00},
  18. {0x00,0x00,0x00,0x00,0x10,0x10,0x10,0x00},
  19. {0x00,0x00,0x00,0x08,0x18,0x18,0x18,0x00},
  20. {0x00,0x00,0x04,0x0c,0x1c,0x1c,0x1c,0x00},
  21. {0x00,0x02,0x06,0x0e,0x1e,0x1e,0x1e,0x00},
  22. {0x01,0x03,0x07,0x0f,0x1f,0x1f,0x1f,0x1f},
  23.                          };
  24. u8 code clear_font[8]={0};   

  26. bit f_busy;   


  29. void delay(u16 x)  
  30. {
  31. while(x--);
  32. }

  34. void busy()   
  35. {
  36. u8 st;
  37. if(f_busy!=1)
  38. {
  39. return;
  40. }
  41.   else
  42. {
  43.    EN=0;
  44. RW=1;
  45. RS=0;   
  46. DATA=0xff;
  47. do
  48. {
  49. EN=0;
  50. EN=1;
  51. delay(10);
  52. st=DATA;
  53. }while(st&0x80);
  54. EN=0;
  55. delay(10);       
  56. }       
  57. }

  59. void write_ddram(u8 add)  
  60. {
  61.   busy();
  62. EN=0;
  63. RW=0;
  64. RS=0;
  65. DATA=add|0x80;
  66. EN=1;
  67. delay(10);
  68. EN=0;
  69. delay(10);

  71. }

  73. void write_dat(u8 dat)  
  74. {
  75. busy();
  76. EN=0;
  77. RW=0;
  78. RS=1;
  79. DATA=dat;
  80. EN=1;
  81. delay(10);
  82. EN=0;
  83. delay(10);       
  84. }

  86. void write_cmd(u8 cmd)   
  87. {
  88. busy();
  89. EN=0;
  90. RW=0;
  91. RS=0;
  92. DATA=cmd;
  93. EN=1;
  94. delay(10);
  95. EN=0;
  96. delay(10);
  97. }

  99. void show_string(u8 add,u8 *p)   
  100. {
  101. write_ddram(add);
  102. while(*p)
  103. {
  104.   write_dat(*p);
  105. p++;
  106. }         
  107. }

  109. void show_char(u8 add,u8 n)
  110. {
  111. write_ddram(add);
  112. write_dat(n);
  113. }

  115. void set_cgram(u8 add)   //設置cgram地址
  116. {
  117. busy();
  118. EN=0;
  119. RW=0;
  120. RS=0;
  121. DATA=add|0x40;    //設置地址時候用
  122. EN=1;
  123. delay(10);
  124. EN=0;
  125. delay(10);       
  126. }

  128. void set_code_cgram(u8 *font, u8 add)   
  129. {
  130. u8 i;
  131. set_cgram(add*8);     //一個字符8行
  132.   for(i=0;i<8;i++)
  133. {
  134. write_dat(font[i]);
  135. }
  136. }


  139. void show_strength(u8 add,u8 x)
  140. {
  141. if(x<2)
  142. {
  143. set_code_cgram(clear_font,6);
  144. show_char(add+1,6);
  145.   set_code_cgram(sign_font[x],x);
  146. show_char(add,x);
  147. }
  148. else
  149. {
  150.   set_code_cgram(sign_font[1],1);
  151. show_char(add,1);
  152. set_code_cgram(sign_font[x],x);
  153. show_char(add+1,x);       
  154. }
  155. if(x>6)x=0;       
  156. }

  158. void LCD_init()   //------------
  159. {
  160. f_busy=0;
  161. delay(15000);
  162. write_cmd(0x38);
  163. delay(5000);
  164. write_cmd(0x38);
  165. delay(5000);
  166. write_cmd(0x38);
  167. f_busy=1;
  168. write_cmd(0x38);  
  169. write_cmd(0x08);  
  170. write_cmd(0x01);
  171. write_cmd(0x06);  
  172. write_cmd(0x0f);       
  173. }

  175. void main()
  176. {
  177. u8 i;
  178. LCD_init();
  179. show_string(0," Sign test!!!");
  180.   show_string(40," Strength: ");

  182. while(1)
  183. {
  184. for(i=0;i<6;i++)
  185. {
  186. delay(60000);
  187. show_strength(50,i);
  188. }

  190. }       
  191. }
復制代碼







作者: 錢情錦繡    時間: 2019-1-7 16:22
求教硬件怎么做？例如檢測100MHZ



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