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標題: LCD1602A-5V使用說明和程序 [打印本頁]
作者: xylds    時間: 2018-11-29 15:06
標題: LCD1602A-5V使用說明和程序
  1. #include <reg51.h>
  2. #include <intrins.h>
  3. //#include <at89x51.h>

  5. sbit LCD_RS=P1^0;//定義引腳
  6. sbit LCD_RW=P1^1;
  7. sbit LCD_E=P1^2;
  8. #define LCD_Data P2
  9. #define Busy    0x80 //用于檢測LCD狀態(tài)字中的Busy標識



  13. void WriteDataLCD(unsigned char WDLCD);
  14. void WriteCommandLCD(unsigned char WCLCD,BuysC);
  15. unsigned char ReadDataLCD(void);
  16. unsigned char ReadStatusLCD(void);
  17. void LCDInit(void);
  18. void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
  19. void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
  20. void Delay5Ms(void);
  21. void Delay400Ms(void);


  24. unsigned char code uctech[] = {"ic2012.taobao.co"};
  25. unsigned char code net[] = {"Happy every day!"};

  27. void main(void)
  28. {
  29. Delay400Ms(); //啟動等待，等LCD講入工作狀態(tài)
  30. LCDInit(); //LCM初始化
  31. Delay5Ms(); //延時片刻(可不要)

  33. DisplayListChar(0, 0, uctech);
  34. DisplayListChar(0, 5, net);
  35. ReadDataLCD();//測試用句無意義
  36. while(1);
  37. }

  39. //寫數(shù)據(jù)
  40. void WriteDataLCD(unsigned char WDLCD)
  41. {
  42. ReadStatusLCD(); //檢測忙
  43. LCD_Data = WDLCD;
  44. LCD_RS = 1;
  45. LCD_RW = 0;
  46. LCD_E = 0; //若晶振速度太高可以在這后加小的延時
  47. LCD_E = 0; //延時
  48. LCD_E = 1;
  49. }

  51. //寫指令
  52. void WriteCommandLCD(unsigned char WCLCD,BuysC) //BuysC為0時忽略忙檢測
  53. {
  54. if (BuysC) ReadStatusLCD(); //根據(jù)需要檢測忙
  55. LCD_Data = WCLCD;
  56. LCD_RS = 0;
  57. LCD_RW = 0;
  58. LCD_E = 0;
  59. LCD_E = 0;
  60. LCD_E = 1;
  61. }

  63. //讀數(shù)據(jù)
  64. unsigned char ReadDataLCD(void)
  65. {
  66. LCD_RS = 1;
  67. LCD_RW = 1;
  68. LCD_E = 0;
  69. LCD_E = 0;
  70. LCD_E = 1;
  71. return(LCD_Data);
  72. }

  74. //讀狀態(tài)
  75. unsigned char ReadStatusLCD(void)
  76. {
  77. LCD_Data = 0xFF;
  78. LCD_RS = 0;
  79. LCD_RW = 1;
  80. LCD_E = 0;
  81. LCD_E = 0;
  82. LCD_E = 1;
  83. while (LCD_Data & Busy); //檢測忙信號
  84. return(LCD_Data);
  85. }

  87. void LCDInit(void) //LCM初始化
  88. {
  89. LCD_Data = 0;
  90. WriteCommandLCD(0x38,0); //三次顯示模式設置，不檢測忙信號
  91. Delay5Ms();
  92. WriteCommandLCD(0x38,0);
  93. Delay5Ms();
  94. WriteCommandLCD(0x38,0);
  95. Delay5Ms();

  97. WriteCommandLCD(0x38,1); //顯示模式設置,開始要求每次檢測忙信號
  98. WriteCommandLCD(0x08,1); //關閉顯示
  99. WriteCommandLCD(0x01,1); //顯示清屏
  100. WriteCommandLCD(0x06,1); // 顯示光標移動設置
  101. WriteCommandLCD(0x0C,1); // 顯示開及光標設置
  102. }

  104. //按指定位置顯示一個字符
  105. void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
  106. {
  107. Y &= 0x1;
  108. X &= 0xF; //限制X不能大于15，Y不能大于1
  109. if (Y) X |= 0x40; //當要顯示第二行時地址碼+0x40;
  110. X |= 0x80; // 算出指令碼
  111. WriteCommandLCD(X, 0); //這里不檢測忙信號，發(fā)送地址碼
  112. WriteDataLCD(DData);
  113. }

  115. //按指定位置顯示一串字符
  116. void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
  117. {
  118. unsigned char ListLength;

  120.   ListLength = 0;
  121. Y &= 0x1;
  122. X &= 0xF; //限制X不能大于15，Y不能大于1
  123. while (DData[ListLength]>=0x20) //若到達字串尾則退出
  124.   {
  125.    if (X <= 0xF) //X坐標應小于0xF
  126.     {
  127.      DisplayOneChar(X, Y, DData[ListLength]); //顯示單個字符
  128.      ListLength++;
  129.      X++;
  130.     }
  131.   }
  132. }

  134. //5ms延時
  135. void Delay5Ms(void)
  136. {
  137. unsigned int TempCyc = 5552;
  138. while(TempCyc--);
  139. }

  141. //400ms延時
  142. void Delay400Ms(void)
  143. {
  144. unsigned char TempCycA = 5;
  145. unsigned int TempCycB;
  146. while(TempCycA--)
  147. {
  148.   TempCycB=7269;
  149.   while(TempCycB--);
  150. };
  151. }
復制代碼


LCD1602A-5V廠家說明書.pdf

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