key.c

PT2313程序音响控制电路1

#include "at89x51.h"
/////////////////////////////////////
sbit   volinc=P3^2;
sbit   voldec=P3^3;
sbit   mute=P3^0;
bit    keyflap;
////////////////////////////////
uchar keyscan(uchar value)
{
uchar   i;
	
	if(volinc==0)
	{
//	if(keyflap==1)
//	return(value=0);
//	else
	delay1(100);
	if(volinc==0)
	{	
    delay2(100,100);
	return(value=0x0a);
	
}
       } 
	if(voldec==0)
	{
	delay1(100);
	if(voldec==0)
{	
delay2(100,100);
	return(value=0x0b);
}
}
/*	if(mute==0)
	{
        delay1(250);
        if(mute==0)
        while(mute==0)
	return(value=2);
}
 */             
}