- #include <reg51.h>
- #include <intrins.h>
- #define uchar unsigned char
- #define uint unsigned int
- #define DelayNOPx() {_nop_();_nop_();_nop_();_nop_();}
- sbit BEEP = P1^0;
- sbit RS = P2^0;
- sbit RW = P2^1;
- sbit E = P2^2;
- void DelayMS (uint ms);
- bit LCD_Busy ();
- void LCD_Pos (uchar);
- void LCD_Wcmd (uchar);
- void LCD_Wdat (uchar);
- char code Title_Text[] = {"--xcz&zzj Design --"};
- uchar code Key_Table[]={'1','2','3','4','5','6','7','8','9','*','0','#'};
- uchar Dial_Code_Str[] = {" "};
- uchar KeyNo = 0xFF;
- int tCount = 0;
- void DelayMS (uint x)
- {
- uchar i;
- while(x--) for (i = 0;i < 120; i++);
- }
- void Display_String(uchar * str,uchar LineNo)
- {
- uchar k;
- LCD_Pos(LineNo);
- for (k = 0; k< 16; k++) LCD_Wdat (str[k]);
- }
- bit LCD_Busy ()
- {
- bit result;
- RS =0;RW =1;E=1;DelayNOPx();result = (bit)(P0 & 0x80); E= 0;
- return result;
- }
- void LCD_Wcmd (uchar cmd)
- {
- while (LCD_Busy ());
- RS=0;RW=0;E=0;_nop_();_nop_();
- P0=cmd;DelayNOPx();E=1;DelayNOPx();E=0;
- }
- void LCD_Wdat (uchar str)
- {
- while (LCD_Busy ());
- RS =1;RW =0;E=0;
- P0=str; DelayNOPx ();
- E=1;DelayNOPx();E=0;
- }
- void LCD_Init()
- {
- LCD_Wcmd(0x38);DelayMS(1);
- LCD_Wcmd(0x0c);DelayMS(1);
- LCD_Wcmd(0x06);DelayMS(1);
- LCD_Wcmd(0x01);DelayMS(1);
- }
- void LCD_Pos (uchar pos)
- {
- LCD_Wcmd(pos | 0x80);
- }
- void T0_INT () interrupt 1
- {
- TH0 = -600 / 256;
- TL0 = -600 % 256;
- BEEP = ~BEEP;
- if (++tCount == 200)
- {
- tCount = 0; TR0 = 0;
- }
- }
- uchar GetKey ()
- {
- uchar i, j, k = 0;
- uchar KeyScanCode [] = {0xEF, 0xDF, 0xBF, 0x7F};
- uchar KeyCodeTable[] ={0xEE,0xED,0xEB,0xDE,0xDD,0xDB,
- 0xBE,0xBD,0xBB,0x7E,0x7D,0x7B};
- P3 = 0x0F;
- if (P3!= 0x0F) DelayMS(20);
- if (P3!= 0x0F)
- {
- for (i = 0; i< 4;i++)
- {
- P3 = KeyScanCode[i];
- for (j = 0;j < 3;j++)
- {
- k = i * 3 + j;
- if (P3 == KeyCodeTable[k]) return k;
- }
- }
- }
- else return 0xFF;
- }
- void main()
- {
- uchar i = -1,j,a;
- P0 = P2 = P1 = 0xFF;
- IE = 0x82;
- TMOD = 0X01;
- LCD_Init();
- Display_String (Title_Text,0x00);
- while(1)
- {
- KeyNo = GetKey();
- if (KeyNo ==0xFF) continue;
- i++;
- if(KeyNo==9)
- {
- Dial_Code_Str[i-1]= ' ';i=i-2; }
- else
- {
- if (KeyNo==11)
- {
- for (a = 0;a< 16;a++) Dial_Code_Str[a] = ' '; i=-1;
- }
- else if (i == 11)
- {for (j = 0;j < 16;j++) Dial_Code_Str[j] = ' ';i = 0;
- }
- Dial_Code_Str[i] = Key_Table [KeyNo];
- }
- Display_String (Dial_Code_Str, 0x40);
- TR0 = 1;
- while(GetKey()!=0xFF);
- }
- }
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