标题: Arduino驱动LCD1602液晶程序 [打印本页]
作者: 滚去学习    时间: 2021-10-24 20:52
标题: Arduino驱动LCD1602液晶程序
LCD1602的V0是背光可接Arduino的GND
  1. #define RS_CLR digitalWrite(13,LOW);
  2. #define RS_SET digitalWrite(13,HIGH);

  4. #define RW_CLR digitalWrite(12,LOW);
  5. #define RW_SET digitalWrite(12,HIGH);

  7. #define EN_CLR digitalWrite(11,LOW);
  8. #define EN_SET digitalWrite(11,HIGH);

  10. unsigned char arr[]="Hello Word!";  //16个字符以内

  12. void setup() {
  13.   pinMode(2,OUTPUT);//D7
  14.   pinMode(3,OUTPUT);//D6
  15.   pinMode(4,OUTPUT);//D5
  16.   pinMode(5,OUTPUT);//D4
  17.   pinMode(6,OUTPUT);//D3
  18.   pinMode(7,OUTPUT);//D2
  19.   pinMode(8,OUTPUT);//D1
  20.   pinMode(9,OUTPUT);//D0
  21. // pinMode(10,OUTPUT);
  22.   pinMode(11,OUTPUT);//EN
  23.   pinMode(12,OUTPUT);//RW
  24.   pinMode(13,OUTPUT);//RS

  26. }

  28. void loop() {

  30.   LCD_Init();
  31.   LCD_Clear();//清屏
  32.   LCD_Write_Char(7,0,'o');
  33.   LCD_Write_Char(8,0,'k');
  34.   LCD_Write_String(1,1,arr);
  35.   delay(1000);
  36.   delay(1000);
  37.   delay(1000);
  38.   delay(1000);
  39.   delay(1000);
  40. }

  42. //模拟单片机八位输出
  43. void DataPort(unsigned char data)
  44. {

  46. if(data&0x80)digitalWrite(2,1);
  47. else         digitalWrite(2,0);
  48. if(data&0x40)digitalWrite(3,1);
  49. else         digitalWrite(3,0);
  50. if(data&0x20)digitalWrite(4,1);
  51. else         digitalWrite(4,0);
  52. if(data&0x10)digitalWrite(5,1);
  53. else         digitalWrite(5,0);
  54. if(data&0x08)digitalWrite(6,1);
  55. else         digitalWrite(6,0);
  56. if(data&0x04)digitalWrite(7,1);
  57. else         digitalWrite(7,0);
  58. if(data&0x02)digitalWrite(8,1);
  59. else         digitalWrite(8,0);
  60. if(data&0x01)digitalWrite(9,1);
  61. else         digitalWrite(9,0);


  64. }
  65. /*------------------------------------------------
  66.               判忙函数
  67. ------------------------------------------------*/

  69. char LCD_Check_Busy(void)
  70. {
  71.   unsigned char x;
  72. DataPort(0xFF);
  73. RS_CLR;
  74. RW_SET;
  75. EN_CLR;
  76. delay(1);
  77. EN_SET;
  78. pinMode(13,INPUT);
  79. x=digitalRead(13);
  80. pinMode(13,OUTPUT);
  81. if(x) return 0;
  82. else return 1;
  83. }

  85. /*------------------------------------------------
  86.               写入命令函数
  87. ------------------------------------------------*/
  88. void LCD_Write_Com(unsigned char com)
  89. {  
  90. while(LCD_Check_Busy()); //忙则等待
  91. delay(5);
  92. RS_CLR;
  93. RW_CLR;
  94. EN_SET;
  95. DataPort(com);
  96. delay(1);
  97. EN_CLR;
  98. }
  99. /*------------------------------------------------
  100.               写入数据函数
  101. ------------------------------------------------*/
  102. void LCD_Write_Data(unsigned char Data)
  103. {
  104. //while(LCD_Check_Busy()); //忙则等待
  105. delay(5);
  106. RS_SET;
  107. RW_CLR;
  108. EN_SET;
  109. DataPort( Data);
  110. delay(1);
  111. EN_CLR;
  112. }

  114. /*------------------------------------------------
  115.                 清屏函数
  116. ------------------------------------------------*/
  117. void LCD_Clear(void)
  118. {
  119. LCD_Write_Com(0x01);
  120. delay(5);
  121. }
  122. /*------------------------------------------------
  123.               写入字符串函数
  124. ------------------------------------------------*/
  125. void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
  126. {     
  127. if (y == 0)
  128.   {     
  129.    LCD_Write_Com(0x80 + x);     //表示第一行
  130.   }
  131. else
  132.   {      
  133.   LCD_Write_Com(0xC0 + x);      //表示第二行
  134.   }        
  135. while (*s)
  136.   {     
  137. LCD_Write_Data( *s);     
  138. s ++;     
  139.   }
  140. }
  141. /*------------------------------------------------
  142.               写入字符函数
  143. ------------------------------------------------*/
  144. void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)
  145. {     
  146. if (y == 0)
  147.   {     
  148.   LCD_Write_Com(0x80 + x);     
  149.   }   
  150. else
  151.   {     
  152.   LCD_Write_Com(0xC0 + x);     
  153.   }        
  154. LCD_Write_Data( Data);  
  155. }
  156. /*------------------------------------------------
  157.               初始化函数
  158. ------------------------------------------------*/
  159. void LCD_Init(void)
  160. {
  161.    LCD_Write_Com(0x38);    /*显示模式设置*/
  162.    delay(5);
  163.    LCD_Write_Com(0x38);
  164.    delay(5);
  165.    LCD_Write_Com(0x38);
  166.    delay(5);
  167.    LCD_Write_Com(0x38);  
  168.    LCD_Write_Com(0x08);    /*显示关闭*/
  169.    LCD_Write_Com(0x01);    /*显示清屏*/
  170.    LCD_Write_Com(0x06);    /*显示光标移动设置*/
  171.    delay(5);
  172.    LCD_Write_Com(0x0C);    /*显示开及光标设置*/
  173. }
  174.    
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