keytest.c

口若悬河口若悬河口若悬河口若悬河口若悬河口若悬河口若悬河口若悬河口若悬河

#include"reg51.h"
#define uchar unsigned char
uchar keystu=0xff;
sbit P10=P1^0;
bit t10ms=0;
uchar seg[]={0xfe,0xfd,0xfb,0xf7};
//uchar i=0;

delay()
{
uchar i,j;
for(i=0;i<200;i++)
for(j=0;j<200;j++);
;
}init()
{
TMOD=0x1f;
TR1=1;
TL1=0x54;
TH1=0xd9;
ET1=1;
EA=1;
}

uchar keyin()
{
if(P10==0)
keystu=keystu<<1;
return(keystu);
} 

/***************中断入口***************/
void timer1() interrupt 3
{
//unchar t;
TL1=0xd3;
TH1=0x54;
//TF1=0;
t10ms=1;
}

void main()
{
uchar k,i=0;
init();
while(1)
{
if(t10ms)
{
t10ms=0;
k=keyin();
if(k<=0xfa||k==0xfc)
{
keystu=0xff;
P2=seg[i];
i++;
delay();
if(i==4)
i=0;
}
}}}