key.c

这里有很多我自己做的凌阳单片机源程序

#include"bit.h"
unsigned int key_scan()
{
	PB_Dir->bit.bit6=0;
	PB_Dir->bit.bit4=0;
	PB_Dir->bit.bit5=0;
	PB_Attrib->bit.bit6=0;
	PB_Attrib->bit.bit4=0;
	PB_Attrib->bit.bit5=0;
	P1_6=0;
	P1_4=0;
	P1_5=0;
	if(P1_6|P1_4|P1_5)
	{
		return 1;
	}
	return 0;
}