keyboard.h

Mp3的设计方案

//keyboard


sbit KINF0=ACC^0;
sbit KINF1=ACC^1;
sbit KINF2=ACC^2;
sbit KINF3=ACC^3;

uchar KBFLAG0=0;
uchar KBFLAG1=0;
uchar KBFLAG2=0;
uchar KBFLAG3=0;

extern void EnKbdINT(void)
{IEN1=IEN1|0x10;}

extern void KbdSet(uchar KINL,uchar KINM)
{uchar value;
 value=KINL<<4+(KINM&0x0f);
 KBCON=value;
}

void kbd() interrupt KBDINT
{ACC=KBSTA;
 //delay(0xffff);
      if(KINF0){KBFLAG0=1;
	            }
 else if(KINF1){KBFLAG1=1;
                }
 else if(KINF2){KBFLAG2=1;
                }
 else if(KINF3){KBFLAG3=1;
                }
 
}