基于单片机八路抢答系统仿真设计-学习分享

974基于单片机八路抢答系统仿真设计-学习分享

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#include <at89x51.h>
#define uchar	unsigned char
#define uint	unsigned int
#define  M	10
char	s;
uchar	num		= 0;
char	time		= 30;                   /* 抢答时间 */
char	datitime	= 30;                   /* 答题限时时间 */
uint	tt, t1;                                 /* T0,T1定时器定一秒时 */
bit	flag, s_flag = 1, b_flag, fall_flag;    /* 标志位 */
bit	K_startcountflag, K_timecountflag;      /* 时间调整标志位 */
sbit	K0		= P3 ^ 0;
sbit	beep		= P3 ^ 7;               /* 蜂鸣器 */
sbit	rled		= P3 ^ 1;               /* 指示灯 */
sbit	K1		= P1 ^ 0;
sbit	K2		= P1 ^ 1;
sbit	K3		= P1 ^ 2;
sbit	K4		= P1 ^ 3;
sbit	K5		= P1 ^ 4;
sbit	K6		= P1 ^ 5;
sbit	K7		= P1 ^ 6;
sbit	K8		= P1 ^ 7;
sbit	scl		= P0 ^ 0;
sbit	sda		= P0 ^ 1;
sbit	K_Time		= P3 ^ 2;       /*复位键 */
sbit	K_startcount	= P3 ^ 3;       /* 开始抢答时间调整键 */
sbit	add		= P3 ^ 4;       /* 答题计时时间调整键 */
sbit	sub		= P3 ^ 5;       /* 答题计时时间调整键 */

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