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廢話不多說(shuō)直接代碼吧
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit pwm=P0^0;
sbit keyup=P3^2;
sbit keydn=P3^3;
sbit keysdk=P3^4;
sbit keysdm=P3^5;
uchar qi=10,zhi=10;
uchar count0,flag,jd;
int count1,sd=20;
void delay(uint z)
{
uchar x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void tm_init()
{
TMOD=0x11;//¶¨Ê±Æ÷1¡¢2 ¹¤×÷ÔÚģʽ1 ¼´65536
TH1=(65536-50000)/256;//¶¨Òå500ms
TL1=(65536-50000)%256;
TH0=0xff;//¶¨Òå0.1ms
TL0=0x9c;
IE=0x8a;
TR0=1;
TR1=1;
}
void tm0_int() interrupt 1 //t0¶¨Òå
{
uchar temp;
TH0=0xff;//¶¨Òå0.1ms
TL0=0x9c;
if(flag==1)
temp=qi;
else
temp=zhi;
if(count0<temp)
pwm=1;
else
pwm=0;
count0=count0+1;
count0=count0%200;
}
void tm1_int() interrupt 3
{
TH1=(65536-50000)/256;//¶¨Òå500ms
TL1=(65536-50000)%256;
count1++;
if(count1==4)
flag=0;
if(count1==sd)//30Ãë 600
{
flag=1;
count1=0;
}
}
void test()
{
if(keyup==0)
{
delay(20);
if(keyup==0)
{
qi++;
count0=0;
while(!keyup);
}
}
if(keydn==0)
{
delay(20);
if(keydn==0)
{
qi--;
count0=0;
while(!keydn);
}
}
if(keysdk==0)
{
delay(20);
if(keysdk==0)
{
sd=sd+20;
count1=0;
while(!keysdk);
}
}
if(keysdm==0)
{
delay(20);
if(keysdm==0)
{
sd=sd-20;
count1=0;
while(!keysdm);
}
}
}
void main()
{
uint m=0;
count0=0;count1=0;
jd=15;
flag=1;//falg=1ʱcount0=10 flag=0ʱcount0=10
tm_init();
while(1)
{
test();
}
}
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