/********************************************************LCD12864字符显示********************************************************/#include <reg51.h>#include <ziku.h>#include <intrins.h>#include <absacc.h>#define uchar unsigned char#define uint unsigned int //宏定义/*****LCD接口定义*****/sbit LCD_RS = P2^0; //1:输入数据；0:输入命令sbit LCD_RW = P2^1; //1:读数据0:写数据sbit LCD_EN = P2^2; //LCM使能端//sbit LCD_PSB = P2^3; //串并口选择1:并口模式; 0:串口模式;#define LCD_DATA P1 //LCD总线端口/*****LCD功能初始化指令*****/#define CLEAR_SCREEN 0x01 //清屏指令：清屏且AC值为00H#define AC_INIT 0x02 //将AC设置为00H。

且游标移到原点位置#define CURSE_ADD 0x06 //设定游标移到方向及图像整体移动方向（默认游标右移，图像整体不动）#define FUN_MODE 0x30 //工作模式：8位基本指令集#define DISPLAY_ON 0x0c //显示开,显示游标，且游标位置反白#define DISPLAY_OFF 0x08 //显示关#define CURSE_DIR 0x14 //游标向右移动:AC=AC+1#define SET_CG_AC 0x40 //设置AC，范围为：00H~3FH#define SET_DD_AC 0x80/*****汉字地址表*****/uchar code addr_tab[]={ //便于根据汉字坐标求出地址0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,//第一行汉字位置0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,//第二行汉字位置0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,//第三行汉字位置0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,//第四行汉字位置};/*****n（ms）延时子程序*****/void delayms(uint t) //约延时n（ms）{uint i;while(t--){for(i=0;i<150;i++);}}/*****等待LCD忙*****/void WaitBusy(void) //延时一小段时间，等待LCD空闲{uchar i=5;while(i--);}/*****写指令代码*****/void Lcd_WriteCmd(uchar cmdcode){LCD_RS = 0;LCD_RW = 0;LCD_EN = 1;WaitBusy();LCD_DATA = cmdcode;LCD_EN = 0;}/*****写数据*****/void Lcd_WriteData(uchar dispdata){LCD_RS = 1;LCD_RW = 0;LCD_EN = 1;WaitBusy();LCD_DATA = dispdata;// WaitBusy();// WaitBusy();// WaitBusy();LCD_EN = 0;}/*****初始化LCD*****/void Lcd_Init(){// LCD_PSB = 1;delayms(50);Lcd_WriteCmd(0x30); //选择基本指令集delayms(1);delayms(1);WaitBusy();Lcd_WriteCmd(0x30); //选择8bit数据流delayms(1);delayms(1);Lcd_WriteCmd(0x0c); //开显示(无游标、不反白)delayms(1);delayms(1);Lcd_WriteCmd(0x01); //清除显示，并且设定地址指针为00H delayms(20);}/*****显示汉字*****/void hanzi_Disp(uchar x,uchar y,uchar code *s){ //x、y为汉字坐标Lcd_WriteCmd(addr_tab[8*x+y]); //写地址delayms(1);while(*s>0){Lcd_WriteData(*s);delayms(1); //写数据s++;}}/*****显示图片（显示Gdram内容）*****//*绘图显示的步骤1 关闭绘图显示功能2 先将垂直的坐标(Y)写入绘图RAM地址3 再将水平的位元组坐标(X)写入绘图RAM地址4 将D15－D8写入RAM中5 将D7－D0写入到RAM中6 打开绘图显示功能*///图片取模方式：横向取模，字节正序void pic_Disp(uchar *pic) //显示Gdram内容（显示图片）{uchar x,y,i;for(i=0;i<9;i=i+8)for(y=0;y<32;y++){for(x=0;x<8;x++){Lcd_WriteCmd(0x36); //扩充指令，开绘图显示Lcd_WriteCmd(0x80+y); //行地址Lcd_WriteCmd(0x80+x+i); //列地址Lcd_WriteData(*pic++); //写数据D15－D8Lcd_WriteData(*pic++); //写数据D7－D0Lcd_WriteCmd(0x30);}}}/*****整屏显示竖条*****///当i=0时显示上面128×32,当i=8时显示下面128×32//当i=0时显示上面128×32,当i=8时显示下面128×32 void LcdFill_Vertical(){uchar x,y,i;for(i=0;i<9;i=i+8)for(y=0;y<0x20;y++){for(x=0;x<8;x++){Lcd_WriteCmd(0x36); //扩充指令绘图显示Lcd_WriteCmd(y+0x80); //行地址Lcd_WriteCmd(x+0x80+i); //列地址Lcd_WriteData(0x55); //写数据D15－D8Lcd_WriteData(0x55); //写数据D7－D0 Lcd_WriteCmd(0x30);}}}/*****整屏显示横条*****/void LcdFill_Level()uchar x,y,i;uchar k;for(i=0;i<9;i+=8)for(y=0;y<0x20;y++){if((y%2)==1) k=0xff;else k=0;for(x=0;x<8;x++){Lcd_WriteCmd(0x36); //扩充指令绘图显示Lcd_WriteCmd(y+0x80); //行地址Lcd_WriteCmd(x+0x80+i); //列地址Lcd_WriteData(k);Lcd_WriteData(k);Lcd_WriteCmd(0x30);}}}/*****整屏充满亮点或暗点*****///当i=0时显示上面128×32,当i=8时显示下面128×32 //当i=0时显示上面128×32,当i=8时显示下面128×32 void Lcd_Fill(uchar test){uchar x,y,i;for(i=0;i<9;i=i+8)for(y=0;y<0x20;y++){for(x=0;x<8;x++){Lcd_WriteCmd(0x36); //扩充指令绘图显示Lcd_WriteCmd(y+0x80); //行地址Lcd_WriteCmd(x+0x80+i); //列地址Lcd_WriteData(test); //写数据D15－D8Lcd_WriteData(test); //写数据D7－D0 Lcd_WriteCmd(0x30);}}}/*****主函数*****/void main(void){// COM=0x80;Lcd_Init();while(1){Lcd_Init();hanzi_Disp(0,0,"ST7920型液晶模块");hanzi_Disp(2,1,"合肥求精电子");hanzi_Disp(3,0,"");//hanzi_Disp(3,0," ");delayms(1500);Lcd_Init();// Lcd_Fill(0xff);hanzi_Disp(1,2,"坏点检测");delayms(500);Lcd_Init();Lcd_Fill(0xff);delayms(1500);Lcd_Init();LcdFill_Vertical();delayms(750);Lcd_Init();LcdFill_Level();delayms(750);Lcd_Init();hanzi_Disp(1,2,"显示汉字");delayms(500);Lcd_Init();hanzi_Disp(0,0,tangshi); // delayms(1500);Lcd_Init();hanzi_Disp(1,2,"显示图片");delayms(500);Lcd_Init();pic_Disp(LCDsheji); // delayms(1000);Lcd_Init();pic_Disp(rmb); // delayms(1000);Lcd_Init();pic_Disp(qiche); // delayms(1000);Lcd_Init();pic_Disp(gongji); //delayms(1000);Lcd_Init();pic_Disp(kuzi); // delayms(1000);Lcd_Init();pic_Disp(LCDquijing); // delayms(1000);Lcd_Init();hanzi_Disp(1,1,"科技无所不能！");delayms(1000);Lcd_Fill(0x00); //清显示RAMdelayms(500);}}。