------------------------------------------------*/
#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 //單片機 P0<------> 液晶DB0-DB7
sbit KEY_ADD=P3^3; //定義按鍵輸入端口
sbit KEY_DEC=P3^4;
unsigned char curr,currold;//全局變量，當前箭頭位置
unsigned char code user16x16[]={ //箭頭圖片
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.設置1"},
{" 2.設置2"},
{" 3.設置3"},
{" 4.設置4"},
{" 5.設置5"},
{" 6.設置6"},
{" 7.設置7"},
{" 8.設置8"},
{" 9.設置9"},
{" 10. 設置10"},
};
/*------------------------------------------------
檢測忙位
------------------------------------------------*/
void Check_Busy()
{
RS=0;
RW=1;
E=1;
DataPort=0xff;
while((DataPort&0x80)==0x80);//忙則等待
E=0;
}
/*------------------------------------------------
寫命令
------------------------------------------------*/
void Write_Cmd(unsigned char Cmd)
{
Check_Busy();
RS=0;
RW=0;
E=1;
DataPort=Cmd;
DelayUs2x(5);
E=0;
DelayUs2x(5);
}
/*------------------------------------------------
寫數(shù)據(jù)
------------------------------------------------*/
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的延時程序
PSB=1; //設置為8BIT并口工作模式
DelayMs(1); //延時
RES=0; //復位
DelayMs(1); //延時
RES=1; //復位置高
DelayMs(10);
Write_Cmd(0x30); //選擇基本指令集
DelayUs2x(50); //延時大于100us
Write_Cmd(0x30); //選擇8bit數(shù)據(jù)流
DelayUs2x(20); //延時大于37us
Write_Cmd(0x0c); //開顯示(無游標、不反白)
DelayUs2x(50); //延時大于100us
Write_Cmd(0x01); //清除顯示，并且設定地址指針為00H
DelayMs(15); //延時大于10ms
Write_Cmd(0x06); //指定在資料的讀取及寫入時，設定游標的移動方向及指定顯示的移位，光標從右向左加1位移動
DelayUs2x(50); //延時大于100us
}
/*------------------------------------------------
用戶自定義字符
------------------------------------------------*/
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]);
}
}
/*------------------------------------------------
顯示用戶自定義字符
------------------------------------------------*/
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);
}
/*------------------------------------------------
顯示字符串
x:橫坐標值，范圍0~8
y:縱坐標值，范圍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);
}
/*------------------------------------------------
顯示圖片
------------------------------------------------*/
/*void LCD_PutGraphic(unsigned char code *img)
{
int i,j;
//顯示上半屏內容設置
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++;
}
}
//顯示下半屏內容設置
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++;
}
}
}*/
/*------------------------------------------------
設置到繪圖模式
------------------------------------------------*/
/*void SetGraphicMode()
{
Write_Cmd(0x36); //選擇8bit數(shù)據(jù)流 圖形模式
DelayUs2x(20);
}*/
/*------------------------------------------------
調用顯示更新
------------------------------------------------*/
void DisplayUpdata(void)
{
unsigned char num;
ClrScreen();
num=sizeof(MainMenu)/sizeof(MainMenu[0]);//判斷數(shù)組中數(shù)值個數(shù)
if((0+(curr/4)*4)<num)
LCD_PutString(0,1,MainMenu[0+(curr/4)*4]);
else //如果超出數(shù)組最大元素，則寫空信息，不判斷此信息可能會出現(xiàn)亂碼
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(); //寫入自定義字符
DisplayUpdata();
while(1)
{
if(curr!=currold) //光標位置變化，則更新顯示
{
DisplayUpdata();
currold=curr;
}
if(!KEY_ADD) //如果檢測到低電平，說明按鍵按下
{
DelayMs(10); //延時去抖，一般10-20ms
if(!KEY_ADD) //再次確認按鍵是否按下，沒有按下則退出
{
while(!KEY_ADD);//如果確認按下按鍵等待按鍵釋放，沒有釋放則一直等待
{
if(curr<sizeof(MainMenu)/sizeof(MainMenu[0])-1)//判斷數(shù)組中數(shù)值個數(shù)
{
curr++;
}
}
}
}
if(!KEY_DEC) //如果檢測到低電平，說明按鍵按下
{
DelayMs(10); //延時去抖，一般10-20ms
if(!KEY_DEC) //再次確認按鍵是否按下，沒有按下則退出
{
while(!KEY_DEC);//如果確認按下按鍵等待按鍵釋放，沒有釋放則一直等待
{
if(curr>0)
{
curr--;
}
}
}
}
}
}
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