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单片机C语言实例-107-按键 12864显示
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--;
}
}
}
}
}
}
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