key3.c

来自「手把手教你单片机」· C语言 代码 · 共 55 行

#include <reg52.h>
#include "key.h"

code uint8 number[]={0xc0,0xf9,0xa4,0xb0,0x99,
					 0x92,0x82,0xf8,0x80,0x90,
					 0xFF};
int8 n = 0;

main()
{
	P0 =0xFF;
	KeyOut1 = 0;
	ENLED = 0; ADDR3 = 1;
	ADDR0 = 0; ADDR1 = 0; ADDR2 = 0;
	P0 = number[0];

	while(1)
	{
		if(!KeyIn1)
		{	
		    delay();
			if(!KeyIn1)
			{
				if(n>=9)
				   n = 0;
				else
				   n++;
				P0 = number[n];
				while(!KeyIn1);
			}
		}
		if(!KeyIn2)
		{
		    delay();
			if(!KeyIn2)
			{
				if(n <= 0)
				   n = 9;
				else
				   n--;
				P0 = number[n];
				while(!KeyIn2);
			}
		}

	}
			
}
void delay()
{
	uint16 i = 1000;
	
	while(i--);
}