求助帖，求高手大神帮忙51单片机怎么用按键控制LED灯的亮度，板子是郭天祥的C52....

ID:138356 · 发表于 2016-9-4 11:32

程序大概写了这么多。。。矩阵键盘前八个按键用于LED灯的开启关闭，后八个按键准备用于8个LED灯亮度的调节。。按键的检测已经有了，不知道如何写控制灯亮度的程序。求大神指导。。

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
sbit key1=P3^4;
sbit d1=P1^1;
sbit d2=P1^2;
sbit d3=P1^3;
sbit d4=P1^4;
sbit d5=P1^5;
sbit d6=P1^6;
sbit d7=P1^7;
sbit d8=P1^8;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0};
uchar num,temp,num1;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
uchar keyscan();
void display(uchar aa);
void main()
{
num=17;
dula=1;
P0=0;
dula=0;
wela=1;
P0=0xc0;
wela=0;

while(1)
{
display(keyscan());
}
}
void display(uchar aa)
{
dula=1;
P0=table[aa-1];
dula=0;
}
uchar keyscan()
{
P3=0xfe;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee:d1=~d1;
break;
case 0xde:d2=~d2;
break;
case 0xbe:d3=~d3;
break;
case 0x7e:d4=~d4;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}

P3=0xfd;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xed:d5=~d5;
break;
case 0xdd:d6=~d6;
break;
case 0xbd:d7=~d7;
break;
case 0x7d:d8=~d8;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}

P3=0xfb;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xeb:;
break;
case 0xdb:;
break;
case 0xbb:;
break;
case 0x7b:;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}

P3=0xf7;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xe7:;
break;
case 0xd7:;
break;
case 0xb7:;
break;
case 0x77:;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}

}