key2.c

来自「手把手教你单片机」· C语言 代码 · 共 41 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)
		{
			if(n>=9)
			   n = 0;
			else
			   n++;
			P0 = number[n];
			while(!KeyIn1);
		}
		if(!KeyIn2)
		{
			if(n <= 0)
			   n = 9;
			else
			   n--;
			P0 = number[n];
			while(!KeyIn2);
		}

	}
			
}