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#include<AT89X52.h>
#include <intrins.h>
#define Delaynop(){_nop_();_nop_();_nop_();_nop_();}
sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;
void Delayms(unsigned int ms);
bit LCD_Busy();
void LCD_Pos(unsigned char);
void LCD_Wcmd(unsigned char);
void LCD_Wdat(unsigned char);
char code Title_Text[]={"--Phone Code-- "};
unsigned char code Key_Table[]={'1','2','3','4','5','6','7','8','9','*','0','#'};
unsigned char Dial_Code_Str[]={" "};
unsigned char KeyNo=0xff;
int tCount=0;
//毫秒級(jí)延時(shí)函數(shù)
void Delayms(unsigned int x)
{
unsigned char i;
while(x--)
{
for(i=0;i<120;i++);
}
}
//顯示字符串
void Display_String(unsigned char *str,unsigned char LineNo)
{
unsigned char k;
LCD_Pos(LineNo);
for(k=0;k<16;k++)
{
LCD_Wdat(str[k]);
}
}
//檢查1602是否處于忙裝填
bit LCD_Busy_Check()
{
bit Result;
RS=0;
RW=1;
EN=1;
Delaynop();
Result=(bit)(P0 & 0x80);
EN=0;
return Result;
}
//向1602寫入指令的函數(shù)
void LCD_Write_Command(unsigned char cmd)
{
while(LCD_Busy_Check()); //檢查是否處于忙狀態(tài)
RS=0;
RW=0;
EN=0;
_nop_();
_nop_();
P0=cmd; //寫入指令
Delaynop();
EN=1;
Delaynop();
EN=0;
}
//向1602寫數(shù)據(jù)
void LCD_Wdat(unsigned char dat)
{
while(LCD_Busy_Check()); //檢查是否處于忙狀態(tài)
RS=1;
RW=0;
EN=0;
P0=dat; //寫入數(shù)據(jù)
Delaynop();
EN=1;
Delaynop();
EN=0;
}
//初始化1602
void Init_LCD()
{
LCD_Write_Command(0x38);Delayms(5);
LCD_Write_Command(0x01);Delayms(5);
LCD_Write_Command(0x06);Delayms(5);
LCD_Write_Command(0x0c);Delayms(5);
}
//設(shè)置顯示位置
void LCD_Pos(unsigned char pos)
{
LCD_Write_Command(pos|0x80);
}
/*
//T0的中斷服務(wù)子函數(shù)
void T0Deal()interrupt 1
{
TH0=-600/256;
TL0=-600%256;
if(++tCount==200)
{
tCount=0;
TR0=0;
}
}
*/
//按鍵掃描函數(shù)，返回值為對(duì)應(yīng)的按鍵編碼
unsigned char GetKey()
{
unsigned char i,j,k=0;
unsigned char KeyScanCode[]={0xef,0xdf,0xbf,0x7f}; //行列掃描的行列碼
unsigned char KeyCodeTable[]={
0xee,0xed,0xeb,0xde,0xdd,0xdb,0xbe,0xbd,0xbb,0x7e,0x7d,0x7b};
P3=0x0f;
if(P3!=0x0f) //如果有按鍵被按下
{
for(i=0;i<4;i++) //依次進(jìn)行掃描
{
P3=KeyScanCode[i];
for(j=0;j<3;j++)
{
k=i*3+j; //計(jì)算對(duì)應(yīng)的按鍵編碼
if(P3==KeyCodeTable[k])
{
return k; //返回按鍵編碼
}
}
}
}
else
{
return 0xff; //或者返回0xff
}
}
//主函數(shù)
void main()
{
unsigned char i=0,j;
P0 = 0xFF;
P2 = 0xFF;
P1 = 0xFF; //初始化端口
// IE=0x82; //設(shè)置中斷
// TMOD=0x01; //啟動(dòng)T0定時(shí)器
Init_LCD(); //初始化1602
Display_String(Title_Text,0x00); //顯示 --Phone Code--
while(1)
{
KeyNo = GetKey(); //獲得按鍵狀態(tài)
if(KeyNo==0xff)
{
continue; //如果沒有按鍵，則進(jìn)入下一個(gè)循環(huán)
}
if(++i==12) //如果已經(jīng)超過11個(gè)數(shù)字，清除顯示屏幕
{
for(j=0;j<16;j++)
Dial_Code_Str[j]=' ';
i=0;
}
Dial_Code_Str[i]=Key_Table[KeyNo]; //顯示撥號(hào)數(shù)據(jù)
Display_String(Dial_Code_Str,0x40);
// TR0=1;
while(GetKey()!=0xff);
}
}

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