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- #include <reg51.h>
- #include <intrins.h>
- //#include <at89x51.h>
- sbit LCD_RS=P1^0;//定义引脚
- sbit LCD_RW=P1^1;
- sbit LCD_E=P1^2;
- #define LCD_Data P2
- #define Busy 0x80 //用于检测LCD状态字中的Busy标识
- void WriteDataLCD(unsigned char WDLCD);
- void WriteCommandLCD(unsigned char WCLCD,BuysC);
- unsigned char ReadDataLCD(void);
- unsigned char ReadStatusLCD(void);
- void LCDInit(void);
- void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
- void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
- void Delay5Ms(void);
- void Delay400Ms(void);
- unsigned char code uctech[] = {"ic2012.taobao.co"};
- unsigned char code net[] = {"Happy every day!"};
- void main(void)
- {
- Delay400Ms(); //启动等待,等LCD讲入工作状态
- LCDInit(); //LCM初始化
- Delay5Ms(); //延时片刻(可不要)
- DisplayListChar(0, 0, uctech);
- DisplayListChar(0, 5, net);
- ReadDataLCD();//测试用句无意义
- while(1);
- }
- //写数据
- void WriteDataLCD(unsigned char WDLCD)
- {
- ReadStatusLCD(); //检测忙
- LCD_Data = WDLCD;
- LCD_RS = 1;
- LCD_RW = 0;
- LCD_E = 0; //若晶振速度太高可以在这后加小的延时
- LCD_E = 0; //延时
- LCD_E = 1;
- }
- //写指令
- void WriteCommandLCD(unsigned char WCLCD,BuysC) //BuysC为0时忽略忙检测
- {
- if (BuysC) ReadStatusLCD(); //根据需要检测忙
- LCD_Data = WCLCD;
- LCD_RS = 0;
- LCD_RW = 0;
- LCD_E = 0;
- LCD_E = 0;
- LCD_E = 1;
- }
- //读数据
- unsigned char ReadDataLCD(void)
- {
- LCD_RS = 1;
- LCD_RW = 1;
- LCD_E = 0;
- LCD_E = 0;
- LCD_E = 1;
- return(LCD_Data);
- }
- //读状态
- unsigned char ReadStatusLCD(void)
- {
- LCD_Data = 0xFF;
- LCD_RS = 0;
- LCD_RW = 1;
- LCD_E = 0;
- LCD_E = 0;
- LCD_E = 1;
- while (LCD_Data & Busy); //检测忙信号
- return(LCD_Data);
- }
- void LCDInit(void) //LCM初始化
- {
- LCD_Data = 0;
- WriteCommandLCD(0x38,0); //三次显示模式设置,不检测忙信号
- Delay5Ms();
- WriteCommandLCD(0x38,0);
- Delay5Ms();
- WriteCommandLCD(0x38,0);
- Delay5Ms();
- WriteCommandLCD(0x38,1); //显示模式设置,开始要求每次检测忙信号
- WriteCommandLCD(0x08,1); //关闭显示
- WriteCommandLCD(0x01,1); //显示清屏
- WriteCommandLCD(0x06,1); // 显示光标移动设置
- WriteCommandLCD(0x0C,1); // 显示开及光标设置
- }
- //按指定位置显示一个字符
- void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
- {
- Y &= 0x1;
- X &= 0xF; //限制X不能大于15,Y不能大于1
- if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
- X |= 0x80; // 算出指令码
- WriteCommandLCD(X, 0); //这里不检测忙信号,发送地址码
- WriteDataLCD(DData);
- }
- //按指定位置显示一串字符
- void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
- {
- unsigned char ListLength;
- ListLength = 0;
- Y &= 0x1;
- X &= 0xF; //限制X不能大于15,Y不能大于1
- while (DData[ListLength]>=0x20) //若到达字串尾则退出
- {
- if (X <= 0xF) //X坐标应小于0xF
- {
- DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
- ListLength++;
- X++;
- }
- }
- }
- //5ms延时
- void Delay5Ms(void)
- {
- unsigned int TempCyc = 5552;
- while(TempCyc--);
- }
- //400ms延时
- void Delay400Ms(void)
- {
- unsigned char TempCycA = 5;
- unsigned int TempCycB;
- while(TempCycA--)
- {
- TempCycB=7269;
- while(TempCycB--);
- };
- }
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