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這是我做的矩陣鍵盤電路圖及程序代碼
用PROTUES畫的圖
仿真有效哦
還請大家多多指教
0.png (68.05 KB, 下載次數: 100)
下載附件
2017-4-24 16:21 上傳
單片機源程序：
- #include <reg52.h>
- #define uint unsigned int
- #define uchar unsigned char
- uint led[]={0xc0,0xf9,0xa4, 0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
- 0x88,0x83,0xc6,0xa1,0x86,0x8e};
- uchar a,b,c,temp;
- void delay7ms(void) //?? -0.217013888891us
- {
- unsigned char a,b;
- for(b=208;b>0;b--)
- for(a=14;a>0;a--);
- }
- uchar key()
- {
- P1=0x0f;
- if(P1!=0x0f)
- {
- delay7ms();
- if(P1!=0x0f);
-
- P1=0xfe;
- a=P1^0xfe;
- switch(a)
- {
- case 0x80:c=0; break;
- case 0x40:c=1; break;
- case 0x20:c=2; break;
- case 0x10:c=3; break;
- }
- temp=P1;
- while(temp!=0xfe)
- {
- temp=P1;
- }
- }
-
- P1=0x0f;
- if(P1!=0x0f)
- {
- delay7ms();
- if(P1!=0x0f);
- P1=0xfd;
- a=P1^0xfd;
- switch(a)
- {
- case 0x80:c=4; break;
- case 0x40:c=5; break;
- case 0x20:c=6; break;
- case 0x10:c=7; break;
- }
- temp=P1;
- while(temp!=0xfd)
- {
- temp=P1;
- }
- }
-
- P1=0x0f;
- if(P1!=0x0f)
- {
- delay7ms();
- if(P1!=0x0f);
- P1=0xfb;
- a=P1^0xfb;
- switch(a)
- {
- case 0x80:c=8; break;
- case 0x40:c=9; break;
- case 0x20:c=10; break;
- case 0x10:c=11; break;
- }
- temp=P1;
- while(temp!=0xfb)
- {
- temp=P1;
- }
- }
- P1=0x0f;
- if(P1!=0x0f)
- {
- delay7ms();
- if(P1!=0x0f);
- P1=0xf7;
- a=P1^0xf7;
- switch(a)
- {
- case 0x80:c=12; break;
- case 0x40:c=13; break;
- case 0x20:c=14; break;
- case 0x10:c=15; break;
- }
- temp=P1;
- while(temp!=0xf7)
- {
- temp=P1;
- …………限于本文篇幅 余下代碼請從51黑電子下載附件…………
下載：
jzjp.rar
(16.08 KB, 下載次數: 17)
2017-4-24 11:09 上傳
點擊文件名下載附件
下載積分: 黑幣 -5
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