key1.c

手把手教你单片机

#include <reg51.h>
#include "key.h"

main()
{
	P0 = 0xFF;
	// 独立式按键初始化
	KeyOut1 = 0;
	// led初始化
	ENLED = 0;
	ADDR3 = 1;
	ADDR2 = 1;
	ADDR1 = 1;
	ADDR0 = 0;
				  
	while (1)
	{
		P0 = (P2 >> 4) | 0xF0;	 //1111
	}
}