基于51单片机的八位数字秒表.doc

/基于51单片机的八位数字秒表/开发语言：C51/所选芯片：AT89S51/开发者：jnu.bluecoffee/开发日期：2009年6月18日/小弟刚刚入道，完全原创。如有转载，请注明出处。#include #include #define DIG_NONE 0xff;#define DIG_1 0x7f#define DIG_2 0xbf#define DIG_3 0xdf#define DIG_4 0xef#define DIG_5 0xf7#define DIG_6 0xfb#define DIG_7 0xfd#define DIG_8 0xfe#define LINE 0xf7/根据共阴共阳以及接法要调整typedef unsigned char Byte;typedef bit bool;sbit START = P30;sbit RESET = P31;Byte data dis_digit;Byte data min;Byte data sec;Byte data msec;bool data isStarted;Byte data dis_digit;Byte data dis_index;Byte data dis_buff8;Byte data dis_num8;/根据共阴共阳以及数码管接法这里要的表要调整Byte code number11= 0x28, 0x7E, 0xA2, 0x62, 0x74, 0x61, 0x21, 0x7A, 0x20, 0x60,0xff;/0,1,2,3,4,5,6,7,8,9,关显示，数码管码表Byte dis_buff8; / 显示缓冲区Byte dis_num8; / 秒计数值, BCD码Byte dis_index;bit Scan_Key();void Proc_Key();void Delayms(Byte ms);void Update_buff();void Msec_Increment();void Reset(void);bool Get_Key(bit key);/有效为1void MCU_Init(void);void Timer0_Overflow();void Timer1_Overflow();/sbit K1 = P32;void Msec_Increment()/中断里面的设置msec += 1;if (msec = 100) msec = 0;sec += 1; if (sec = 60)sec = 0;min += 1;if (min = 60)min = 0;void MCU_Init()P1 = 0xff;P2 = 0xff;TMOD = 0x12;TH1 = 0xd8;TL1 = 0xf0;TH0 = 0x9c;TL0 = 0x00;/定时器1选用方式1工作，扫描周期0.01s=10ms，定时器0选用工作方式3工作，自动装入，扫描周期0.1ms=100sReset();min = 0;sec = 0;msec = 0;dis_digit = 0x7f; / 初始显示P20口数码管dis_index = 0;IE = 0x8a; / 使能timer0, timer1中断TR0 = 1;TR1 = 0;isStarted = 0;void Reset()min = 0;sec = 0;msec = 0; Update_buff();void Update_buff()dis_num0 = min / 10;dis_num1 = min % 10;dis_num3 = sec / 10;dis_num4 = sec % 10;dis_num6 = msec / 10;dis_num7 = msec % 10;/这里根据数码管的顺序进行调整dis_buff0 = numberdis_num7;dis_buff1 = numberdis_num6;dis_buff2 = LINE;dis_buff3 = numberdis_num4;dis_buff4 = numberdis_num3;dis_buff5 = LINE;dis_buff6 = numberdis_num1;dis_buff7 = numberdis_num0;bool Get_Key(bit key)/有效为1，这里按下为低电平if (key = 0)return 1;elsereturn 0;void timer0() interrupt 1P2 = 0xff; / 先关闭所有数码管P1 = dis_buffdis_index; / 显示代码传送到P0口P2 = dis_digit; / dis_digit = _cror_(dis_digit,1); / 位选通值右移(P20-P27), 下次中断时选通下一位数码管/_cror_()为字符循环右移函数 dis_index+; / dis_index &= 0x07; / 8个数码管全部扫描完一遍之后，再回到第一个开始下一次扫描void timer1() interrupt 3 TH1 = 0xd8;TL1 = 0xf0;Msec_Increment();Update_buff();void delayms(unsigned char ms) / 延时子程序 unsigned char i;while(ms-)for(i = 0; i 120; i+);void main(void)bool startkey, resetkey;MCU_Init();while(1)startkey = Get_Key(START);resetkey = Get_Key(RESET);if (startkey = 1)Delayms(50);startkey = Get_Key(START);if (startkey = 1)isStarted = !isSta