为你的pcDuino开发板安装一块LCD扩展模块

EEbird

我们从LinkSprite买了一块16×2 LCD扩展板，并为pcDuino安装上 。你只需要花半个小时进行Arduino代码转码，转码完成后我们就可以在16×2 LCD屏幕上显示文本啦。

代码如下：
#include <core.h>#define RS 8#define EN 9#define backlight 10#define RS_L digitalWrite(RS,LOW)#define RS_H digitalWrite(RS,HIGH)#define EN_L digitalWrite(EN,LOW)#define EN_H digitalWrite(EN,HIGH)int DB[] = {7,6,5,4};/********************************************************************/void write_command(int command){int i,temp;RS_L;EN_L;temp=command & 0xf0;for (i=0; i < 4; i++){if(temp&0×80)digitalWrite(DB,HIGH);else digitalWrite(DB,LOW);temp <<= 1;}EN_H;delayMicroseconds(1);EN_L;temp=(command & 0x0f)<<4;for (i=0; i < 4; i++){if(temp&0×80)digitalWrite(DB,HIGH);else digitalWrite(DB,LOW);temp <<= 1;}EN_H;delayMicroseconds(1);EN_L;}/********************************************************************/void write_data(int dat){int i=0,temp;RS_H;EN_L;temp=dat & 0xf0;for (i=0; i < 4; i++){if(temp&0×80)digitalWrite(DB,HIGH);else digitalWrite(DB,LOW);temp <<= 1;}EN_H;delayMicroseconds(1);EN_L;temp=(dat & 0x0f)<<4;for (i=0; i < 4; i++){if(temp&0×80)digitalWrite(DB,HIGH);else digitalWrite(DB,LOW);temp <<= 1;}EN_H;delayMicroseconds(1);EN_L;}/********************************************************************/void LCD_write_char( int x,int y,int dat){int address;if (x ==0) address = 0×80 + y;else address = 0xC0 + y;write_command(address);write_data(dat);delayMicroseconds(10);}/********************************************************************/void lcd1602_init(){int i = 0;pinMode(RS,OUTPUT);pinMode(EN,OUTPUT);pinMode(backlight,OUTPUT);digitalWrite(backlight,HIGH);for (i=0; i < 4; i++){pinMode(DB,OUTPUT);}delay(100);write_command(0×28);delay(50);write_command(0×06);delay(50);write_command(0x0c);delay(50);write_command(0×80);delay(50);write_command(0×01);delay(100);}/********************************************************************/void setup (void){lcd1602_init();}/********************************************************************/void loop (void){write_command(0×02);delay(10);LCD_write_char(0,2,’W');LCD_write_char(0,3,’e');LCD_write_char(0,4,’l');LCD_write_char(0,5,’c');LCD_write_char(0,6,’o');LCD_write_char(0,7,’m');LCD_write_char(0,8,’e');LCD_write_char(0,10,’t');LCD_write_char(0,11,’o');LCD_write_char(1,4,’p');LCD_write_char(1,5,’c');LCD_write_char(1,6,’D');LCD_write_char(1,7,’u');LCD_write_char(1,8,’i');LCD_write_char(1,9,’n');LCD_write_char(1,10,’o');while(1);}