单片机C语言实例按键 12864显示.rar

/*----------------------------------------------- 名称：按键测试单个菜单显示 论坛：www.doflye.net 编写：shifang 日期：2009.5 修改：无 内容：单个菜单，多页显示，不带子菜单 ------------------------------------------------*/ #include <reg52.h> #include <intrins.h> #include "delay.h" sbit RS = P2^4; sbit RW = P2^5; sbit E = P2^6; sbit RES = P2^3; sbit PSB = P2^1; sbit PAUSE = P3^0; #define DataPort P0 //单片机 P0<------> 液晶DB0-DB7 sbit KEY_ADD=P3^3; //定义按键输入端口 sbit KEY_DEC=P3^4; unsigned char curr,currold;//全局变量，当前箭头位置 unsigned char code user16x16[]={ //箭头图片 0x00,0x00,0x20,0x00,0x30,0x00,0x38,0x00,0x3C,0x00,0x3E,0x00,0x3F,0x00,0x3F,0x80, 0x3F,0xC0,0x3F,0x80,0x3F,0x00,0x3E,0x00,0x3C,0x00,0x38,0x00,0x30,0x00,0x20,0x00, }; unsigned char code *MainMenu[]= { {" 1.设置1"}, {" 2.设置2"}, {" 3.设置3"}, {" 4.设置4"}, {" 5.设置5"}, {" 6.设置6"}, {" 7.设置7"}, {" 8.设置8"}, {" 9.设置9"}, {" 10. 设置10"}, }; /*------------------------------------------------ 检测忙位 ------------------------------------------------*/ void Check_Busy() { RS=0; RW=1; E=1; DataPort=0xff; while((DataPort&0x80)==0x80);//忙则等待 E=0; } /*------------------------------------------------ 写命令 ------------------------------------------------*/ void Write_Cmd(unsigned char Cmd) { Check_Busy(); RS=0; RW=0; E=1; DataPort=Cmd; DelayUs2x(5); E=0; DelayUs2x(5); } /*------------------------------------------------ 写数据 ------------------------------------------------*/ void Write_Data(unsigned char Data) { Check_Busy(); RS=1; RW=0; E=1; DataPort=Data; DelayUs2x(5); E=0; DelayUs2x(5); } /*------------------------------------------------ 液晶屏初始化 ------------------------------------------------*/ void Init_ST7920() { DelayMs(40); //大于40MS的延时程序 PSB=1; //设置为8BIT并口工作模式 DelayMs(1); //延时 RES=0; //复位 DelayMs(1); //延时 RES=1; //复位置高 DelayMs(10); Write_Cmd(0x30); //选择基本指令集 DelayUs2x(50); //延时大于100us Write_Cmd(0x30); //选择8bit数据流 DelayUs2x(20); //延时大于37us Write_Cmd(0x0c); //开显示(无游标、不反白) DelayUs2x(50); //延时大于100us Write_Cmd(0x01); //清除显示，并且设定地址指针为00H DelayMs(15); //延时大于10ms Write_Cmd(0x06); //指定在资料的读取及写入时，设定游标的移动方向及指定显示的移位，光标从右向左加1位移动 DelayUs2x(50); //延时大于100us } /*------------------------------------------------ 用户自定义字符 ------------------------------------------------*/ void CGRAM() { int i; Write_Cmd(0x30); Write_Cmd(0x40); for(i=0;i<16;i++) { Write_Data(user16x16[i*2]); Write_Data(user16x16[i*2+1]); } } /*------------------------------------------------ 显示用户自定义字符 ------------------------------------------------*/ void DisplayCGRAM(unsigned char x,unsigned char y) { switch(y) { case 1: Write_Cmd(0x80+x);break; case 2: Write_Cmd(0x90+x);break; case 3: Write_Cmd(0x88+x);break; case 4: Write_Cmd(0x98+x);break; default:break; } Write_Data(00); Write_Data(00); } /*------------------------------------------------ 显示字符串 x:横坐标值，范围0~8 y:纵坐标值，范围1~4 ------------------------------------------------*/ void LCD_PutString(unsigned char x,unsigned char y,unsigned char code *s) { switch(y) { case 1: Write_Cmd(0x80+x);break; case 2: Write_Cmd(0x90+x);break; case 3: Write_Cmd(0x88+x);break; case 4: Write_Cmd(0x98+x);break; default:break; } while(*s>0) { Write_Data(*s); s++; DelayUs2x(50); } } /*------------------------------------------------ 清屏 ------------------------------------------------*/ void ClrScreen() { Write_Cmd(0x01); DelayMs(15); } /*------------------------------------------------ 显示图片 ------------------------------------------------*/ /*void LCD_PutGraphic(unsigned char code *img) { int i,j; //显示上半屏内容设置 for(i=0;i<32;i++) { Write_Cmd(0x80 + i); //SET 垂直地址 VERTICAL ADD Write_Cmd(0x80); //SET 水平地址 HORIZONTAL ADD for(j=0;j<16;j++) { Write_Data(*img); img++; } } //显示下半屏内容设置 for(i=0;i<32;i++) { Write_Cmd(0x80 + i); //SET 垂直地址 VERTICAL ADD Write_Cmd(0x88); //SET 水平地址 HORIZONTAL ADD for(j=0;j<16;j++) { Write_Data(*img); img++; } } }*/ /*------------------------------------------------ 设置到绘图模式 ------------------------------------------------*/ /*void SetGraphicMode() { Write_Cmd(0x36); //选择8bit数据流 图形模式 DelayUs2x(20); }*/ /*------------------------------------------------ 调用显示更新 ------------------------------------------------*/ void DisplayUpdata(void) { unsigned char num; ClrScreen(); num=sizeof(MainMenu)/sizeof(MainMenu[0]);//判断数组中数值个数 if((0+(curr/4)*4)<num) LCD_PutString(0,1,MainMenu[0+(curr/4)*4]); else //如果超出数组最大元素，则写空信息，不判断此信息可能会出现乱码 LCD_PutString(0,1,""); if((1+(curr/4)*4)<num) LCD_PutString(0,2,MainMenu[1+(curr/4)*4]); else LCD_PutString(0,2,""); if((2+(curr/4)*4)<num) LCD_PutString(0,3,MainMenu[2+(curr/4)*4]); else LCD_PutString(0,3,""); if((3+(curr/4)*4)<num) LCD_PutString(0,4,MainMenu[3+(curr/4)*4]); else LCD_PutString(0,4,""); DisplayCGRAM(0,curr%4+1); } /*------------------------------------------------ 主程序 ------------------------------------------------*/ main() { Init_ST7920(); //初始化 CGRAM(); //写入自定义字符 DisplayUpdata(); while(1) { if(curr!=currold) //光标位置变化，则更新显示 { DisplayUpdata(); currold=curr; } if(!KEY_ADD) //如果检测到低电平，说明按键按下 { DelayMs(10); //延时去抖，一般10-20ms if(!KEY_ADD) //再次确认按键是否按下，没有按下则退出 { while(!KEY_ADD);//如果确认按下按键等待按键释放，没有释放则一直等待 { if(curr<sizeof(MainMenu)/sizeof(MainMenu[0])-1)//判断数组中数值个数 { curr++; } } } } if(!KEY_DEC) //如果检测到低电平，说明按键按下 { DelayMs(10); //延时去抖，一般10-20ms if(!KEY_DEC) //再次确认按键是否按下，没有按下则退出 { while(!KEY_DEC);//如果确认按下按键等待按键释放，没有释放则一直等待 { if(curr>0) { curr--; } } } } } }