單片機(jī)矩陣鍵盤控制LED數(shù)碼管的proteus仿真和源碼

ID:354488 · 發(fā)表于 2018-6-19 17:09

鍵盤行列掃描所按按鍵，顯示到顯示屏上，循環(huán)左移位

單片機(jī)源程序如下:

#include<reg51.h>
#include<intrins.h>
#define keyport P2
unsigned char code ledmap[] = { 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
unsigned char led[] = {0,0,0,0,0,0};
unsigned char select = 0xfe;
unsigned char index = 0;
unsigned char keyvalue = 0;
bit flag = 0;
void delay1ms(unsigned char c)
{
unsigned char a,b;
for(c;c>0;c--)
for(b=142;b>0;b--)
for(a=2;a>0;a--);
}
void keyscan(){
keyport = 0xf0;
if(keyport != 0xf0){
// delay1ms(10);
if(keyport != 0xf0){
switch(keyport){//掃描列判斷列
case(0xe0):keyvalue = 0;break;//1110 0000
case(0xd0):keyvalue = 1;break;//1101 0000
case(0xb0):keyvalue = 2;break;//1011 0000
case(0x70):keyvalue = 3;break;//0111 0000
}
keyport = 0x0f;
switch(keyport){//掃描行判斷行
case(0x0e):keyvalue = keyvalue + 0 ; flag = 1 ; break;//0000 1110
case(0x0d):keyvalue = keyvalue + 4 ; flag = 1 ; break;//0000 1101
case(0x0b):keyvalue = keyvalue + 8 ; flag = 1 ; break;//0000 1011
case(0x07):keyvalue = keyvalue + 12; flag = 1 ; break;//0000 0111
}
while((keyport&0x0f) != 0x0f){
}
}
}
}
void ledbuffer(){// 循環(huán)左移
if(flag){
unsigned char i = 0;
unsigned char index;
for(index = 5 ; index > 0 ; index--){
led[index] = led[index-1];
}
led[index] = keyvalue;
flag = 0;
}
}
void ledfresh()interrupt 1{// 刷新動態(tài)數(shù)碼管
P0 = 0xff;//初始為0
P1 = ledmap[led[index]];
P0 = select;
select = _crol_(select,1);//左移
index++;
if(index == 6){
index = 0;
select = 0xfe;
}
TH0 = (65536-4000)>>8;
TL0 = (65536-4000)&0xff;
}
void main(){
SP = 0x50;
TMOD = 0x21;//定時器1，方式0，定時器2，方式1
TH0 = (65536-4000)>>8;//延時4ms
TL0 = (65536-4000)&0xff;
ET0 = 1;
TR0 = 1;
EA = 1;
SCON = 0x40;
TH1 = 0xfd;
……………………
…………限于本文篇幅余下代碼請從51黑下載附件…………

復(fù)制代碼

所有資料51hei提供下載:

矩陣鍵盤.zip (139.92 KB, 下載次數(shù): 45)

ID:411657 · 發(fā)表于 2018-10-18 16:52

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單片機(jī)矩陣鍵盤控制LED數(shù)碼管的proteus仿真和源碼

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