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====== Lcd Display ======

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//__About this Article__//
  * **Author**: aaron --- aaron@cubietech.com --- 2014/02/27 20:57
  * **Copyrights**: [[http://creativecommons.org/licenses/by-sa/3.0/|CC Attribution-Share Alike 3.0 Unported]]
  * **Contributors**: [[http://cubieboard.org/|Cubieboard Community]] : ...
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===== Abstract =====
How to do this,please refer to [[http://docs.cubieboard.org/tutorials/arduino/controlling_led |light led]] and [[http://docs.cubieboard.org/tutorials/arduino/connecting|how to connect cubieboard and arduino]]

{{:tutorials:arduino:照片_4_.jpg|400}}

=====Schematics=====
{{:tutorials:arduino:dd.jpg|200}}

====Source Code====
<code>



int DI = 12;
int RW = 11;
int DB[] = {3, 4, 5, 6, 7, 8, 9, 10};//使用数组来定义总线需要的管脚
int Enable = 2;

void LcdCommandWrite(int value) {
// 定义所有引脚
int i = 0;
for (i=DB[0]; i <= DI; i++) //总线赋值
{
   digitalWrite(i,value & 01);//因为1602液晶信号识别是D7-D0(不是D0-D7)，这里是用来反转信号。
   value >>= 1;
}
digitalWrite(Enable,LOW);
delayMicroseconds(1);
digitalWrite(Enable,HIGH);
delayMicroseconds(1);  // 延时1ms
digitalWrite(Enable,LOW);
delayMicroseconds(1);  // 延时1ms
}

void LcdDataWrite(int value) {
// 定义所有引脚
int i = 0;
digitalWrite(DI, HIGH);
digitalWrite(RW, LOW);
for (i=DB[0]; i <= DB[7]; i++) {
   digitalWrite(i,value & 01);
   value >>= 1;
}
digitalWrite(Enable,LOW);
delayMicroseconds(1);
digitalWrite(Enable,HIGH);
delayMicroseconds(1);
digitalWrite(Enable,LOW);
delayMicroseconds(1);  // 延时1ms
}

void setup (void) {
int i = 0;
for (i=Enable; i <= DI; i++) {
   pinMode(i,OUTPUT);
}
delay(100);
// 短暂的停顿后初始化LCD
// 用于LCD控制需要
LcdCommandWrite(0x38);  // 设置为8-bit接口，2行显示，5x7文字大小                     
delay(64);                      
LcdCommandWrite(0x38);  // 设置为8-bit接口，2行显示，5x7文字大小                        
delay(50);                      
LcdCommandWrite(0x38);  // 设置为8-bit接口，2行显示，5x7文字大小                        
delay(20);                      
LcdCommandWrite(0x06);  // 输入方式设定
                         // 自动增量，没有显示移位
delay(20);                      
LcdCommandWrite(0x0E);  // 显示设置
                         // 开启显示屏，光标显示，无闪烁
delay(20);                      
LcdCommandWrite(0x01);  // 屏幕清空，光标位置归零  
delay(100);                      
LcdCommandWrite(0x80);  // 显示设置
                         // 开启显示屏，光标显示，无闪烁
delay(20);                      
}

void loop (void) {
  LcdCommandWrite(0x01);  // 屏幕清空，光标位置归零  
  delay(10); 
  LcdCommandWrite(0x80+3); 
  delay(10);                     
  // 写入欢迎信息 
  LcdDataWrite('W');
  LcdDataWrite('e');
  LcdDataWrite('l');
  LcdDataWrite('c');
  LcdDataWrite('o');
  LcdDataWrite('m');
  LcdDataWrite('e');
  LcdDataWrite(' ');
  LcdDataWrite('t');
  LcdDataWrite('o');
  delay(10);
  LcdCommandWrite(0xc0+1);  // 定义光标位置为第二行第二个位置  
  delay(10); 
  LcdDataWrite('g');
  LcdDataWrite('e');
  LcdDataWrite('e');
  LcdDataWrite('k');
  LcdDataWrite('-');
  LcdDataWrite('w');
  LcdDataWrite('o');
  LcdDataWrite('r');
  LcdDataWrite('k');
  LcdDataWrite('s');
  LcdDataWrite('h');
  LcdDataWrite('o');
  LcdDataWrite('p');
  delay(5000);
  LcdCommandWrite(0x01);  // 屏幕清空，光标位置归零  
  delay(10);
  LcdDataWrite('I');
  LcdDataWrite(' ');
  LcdDataWrite('a');
  LcdDataWrite('m');
  LcdDataWrite(' ');
  LcdDataWrite('h');
  LcdDataWrite('o');
  LcdDataWrite('n');
  LcdDataWrite('g');
  LcdDataWrite('y');
  LcdDataWrite('i');
  delay(3000);
  LcdCommandWrite(0x02); //设置模式为新文字替换老文字，无新文字的地方显示不变。
  delay(10);
  LcdCommandWrite(0x80+5); //定义光标位置为第一行第六个位置
  delay(10);  
  LcdDataWrite('t');
  LcdDataWrite('h');
  LcdDataWrite('e');
  LcdDataWrite(' ');
  LcdDataWrite('a');
  LcdDataWrite('d');
  LcdDataWrite('m');
  LcdDataWrite('i');
  LcdDataWrite('n');
  delay(5000);
}
</code>


===== Headline =====

=== See Also ===

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{{tag>Cubieboard Cubietruck}}
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