51单片机12864液晶显示.doc

/本程序使用带中文字库的液晶显示器LCD12864#include #include /定义引脚连接#define LCD_DATA P0 /数据口sbit RS = P35; /并行的指令/数据选择信号, H数据, L命令sbit RW = P36; /并行读写选择信号, H读, L写sbit E = P34; /并行使能端, H有效, L无效sbit PSB = P37; /串并行选择端,H选择并行,L选择串行sbit ff=P17; /忙碌标志/待显示的内容 unsigned char code Tab1=机会总是留给准备;unsigned char code Tab2=梅州搜搜网 ;unsigned char code Tab3= 211工作室 ;unsigned char code Tab4=TEL: 07532114432;/延时子程序void Delay1mS(unsigned int tt) /延时tt毫秒 unsigned char i;while(tt-) for(i=113;i0;i-); ;bit CheckBusy() /读BF标志位，检查LCD是否就绪 RS=0; _nop_();RW=1;_nop_();E=1;_nop_();if(LCD_DATA&0x80)return 1;elsereturn 0;void Wait() /等待LCD就绪while(CheckBusy()=1)ff=0;ff=1;/*unsigned char Read_Data() /读数据Wait();RS=1;RW=1;E=1;_nop_();return LCD_DATA;*/Write_Data(unsigned char dat) /写一个字节数据Wait();RS=1;RW=0;E=1;_nop_();LCD_DATA=dat;E=0;_nop_();Write_Command(unsigned char dat) /写命令Wait(); RS=0;RW=0;E=1;_nop_();LCD_DATA=dat; E=0;_nop_();Write_String(unsigned char *p) /写字符串char cnt=0;while(*(p+cnt)!=0) Write_Data(*(p+cnt); cnt+;void LCD_Init() /LCD初始化Write_Command(0x30);/基本指令, 扩充指令为34HDelay1mS(1); Write_Command(0x0c);/显示开, 关光标 .开光标0X0EDelay1mS(1);Write_Command(0x01);/清屏Delay1mS(1); void Set_Position(unsigned char x, unsigned char y) /设置待显示的位置 unsigned char p; switch(x%4) case 0: p = 0x80; break; /第一行开始地址 case 1: p = 0x90; break; /第二行 case 2: p = 0x88; break; /第三行 case 3: p = 0x98; break; /第四行 p += y; Write_Command(p);main()PSB=1; /并行LCD_Init();Set_Position(0,0);Write_String(Tab1);Set_Position(1,0);Write_String(Tab2);Set_P