|
|
仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）
51hei.gif (153.34 KB, 下載次數(shù): 0)
下載附件
2025-11-11 15:42 上傳
單片機源程序如下:
- #include <reg51.h>
- #define uint unsigned int
- #define uchr unsigned char
- sbit led0=P2^2;
- sbit buzzer=P2^3;
- sbit dula=P2^6; //聲明段選線選通端
- sbit wela=P2^7; //聲明位選線選通端
- sbit clear=P3^4;
- uchr key,shi,ge,count;
- uchr code tab[]={
- 0x3f,0x06,0x5b,0x4f,
- 0x66,0x6d,0x7d,0x07,
- 0x7f,0x6f,0x77,0x7c,
- 0x39,0x5e,0x79,0x71,
- 0x76,0x79,0x38,0x3f};
- /*延時子函數(shù)，xms為形參*/
- void delay(uint xms)
- {
- uint x,y;
- for(x=xms;x>0;x--)
- for(y=110;y>0;y--);
- }
- /*矩陣鍵盤掃描子程序*/
- void matrixkeyscan()
- {
- uint temp;
- P3=0xf7; //給P3口賦值
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0) //檢測是否有鍵按下
- {
- delay(6); //延時去抖
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0) //再次檢測是否有鍵按下
- {
- temp=P3;
- switch(temp)
- {
- case 0x77:
- key=1;
- break;
- case 0xb7:
- key=2;
- break;
- case 0xd7:
- key=3;
- break;
- case 0xe7:
- key=4;
- break; //判斷按下的是哪個鍵
- }
- while(temp!=0xf0)
- {
- temp=P3;
- temp=temp&0xf0;
- } //等待按鍵釋放
- }
- }
- P3=0xfb;
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- {
- delay(6);
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- {
- temp=P3;
- switch(temp)
- {
- case 0x7b:
- key=5;
- break;
- case 0xbb:
- key=6;
- break;
- case 0xdb:
- key=7;
- break;
- case 0xeb:
- key=8;
- break;
- }
- while(temp!=0xf0)
- {
- temp=P3;
- temp=temp&0xf0;
- }
- }
- }
- P3=0xfd;
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- {
- delay(6);
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- {
- temp=P3;
- switch(temp)
- {
- case 0x7d:
- key=9;
- break;
- case 0xbd:
- key=10;
- break;
- case 0xdd:
- key=11;
- break;
- case 0xed:
- key=12;
- break;
- }
- while(temp!=0xf0)
- {
- temp=P3;
- temp=temp&0xf0;
- }
- }
- }
- P3=0xfe;
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- {
- delay(6);
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- {
- temp=P3;
- switch(temp)
- {
- case 0x7e:
- key=13;
- break;
- case 0xbe:
- key=14;
- break;
- case 0xde:
- key=15;
- break;
- case 0xee:
- key=16;
- break;
- }
- while(temp!=0xf0)
- {
- temp=P3;
- temp=temp&0xf0;
- }
- }
- }
- }
- /*主函數(shù)*/
- void alarm()
- {
- buzzer=~buzzer;
- led0=~led0;
- delay(30);
- }
- void display(uchr num)
- {
- if(key!=0) //若有鍵按下，則進入該循環(huán)進行處理
- {
-
- dula=1;
- P0=tab[num/10];
- dula=0;
- P0=0x00;
- wela=1;
- P0=0xfe;
- wela=0;
- delay(100);
- dula=1;
- P0=tab[num%10];
- dula=0;
- P0=0x00;
- wela=1;
- P0=0xfd;
- wela=0;
- delay(100);
- alarm();
- }
- }
- void main()
- {
- P0=0x00;
- while(1)
- {
- matrixkeyscan();
- display(key);
- }
- }
下載:
座位號舉手應(yīng)答器.7z
(113.8 KB, 下載次數(shù): 0)
2025-11-11 15:45 上傳
點擊文件名下載附件
下載積分: 黑幣 -5
|
評分
-
查看全部評分
|
QQ好友和群
QQ空間
騰訊微博
騰訊朋友
收藏
淘帖
頂
踩
