[嵌入式]8路抢答器（普中科技开发板）

#include <reg51.h>
//#include <keyscan.h>
//#include <display.h>

#define uchar unsigned char
#define uint unsigned int

sbit kai = P1^7;	   //定义开始抢答按键
sbit ting = P1^6;	   //定义停止答题按键
sbit wei1 = P2^0;	   // 定义位选1
sbit wei2 = P2^1;	   // 定义位选2
sbit wei3 = P2^2;	   // 定义位选3
sbit wei4 = P2^3;	   // 定义位选4
sbit P37 = P3^7;	   //定义抢答开始
sbit P36 = P3^6;	   //定义复位按键
sbit P25 = P2^5;	   //定义蜂鸣器
uchar code table[] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x40};

uchar a, a1, num, shi, ge, hao,
	num1, flag1, flag2, flag3, flag4,
	flag5, flag6, flag7, flag8, flag9, flag1, temp;

void display(uchar hao, uchar aa, uchar shi, uchar ge);
void init();
void delay(uint z);
void keyscan();

void init()
{
	TMOD = 0x11;				//定义定时器工作方式；定时器1的方式1，定时器0的方式0
	TH0 = (65536 - 50000) / 256;		 //装初值
	TL0 = (65536 - 50000) % 256;
	EA = 1;								 //开总中断
	ET0 = 1;							 //开

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