使用定时器按键扫描数码管制作一个可存储数据的秒表

#include <REGX52.H> #include "Timer0.h" #include "Key.h" #include "xianshi.h" #include "Delay.h" #include "AT24C02.h" unsigned char KeyNum; unsigned char Min,Sec,MiniSec; unsigned char RunFlag; void main() { Timer0_Init(); while(1) { KeyNum=Key(); if(KeyNum==1) //K1按键按下 { RunFlag=!RunFlag; //启动标志位翻转 } if(KeyNum==2) //K2按键按下 { Min=0; //分秒清0 Sec=0; MiniSec=0; } if(KeyNum==3) //K3按键按下 { AT24C02_WriteByte(0,Min); //将分秒写入AT24C02 Delay(5); AT24C02_WriteByte(1,Sec); Delay(5); AT24C02_WriteByte(2,MiniSec); Delay(5); } if(KeyNum==4) //K4按键按下 { Min=AT24C02_ReadByte(0); //读出AT24C02数据 Sec=AT24C02_ReadByte(1); MiniSec=AT24C02_ReadByte(2); } xianshi_SetBuf(1,Min/10); //设置显示缓存，显示数据 xianshi_SetBuf(2,Min%10); xianshi_SetBuf(3,11); xianshi_SetBuf(4,Sec/10); xianshi_SetBuf(5,Sec%10); xianshi_SetBuf(6,11); xianshi_SetBuf(7,MiniSec/10); xianshi_SetBuf(8,MiniSec%10); } } /** * @brief 秒表驱动函数，在中断中调用 * @param 无 * @retval 无 */ void Sec_Loop(void) { if(RunFlag) { MiniSec++; if(MiniSec>=100) { MiniSec=0; Sec++; if(Sec>=60) { Sec=0; Min++; if(Min>=60) { Min=0; } } } } } void Timer0_Routine() interrupt 1 { static unsigned int T0Count1,T0Count2,T0Count3; TL0 = 0x18; //设置定时初值 TH0 = 0xFC; //设置定时初值 T0Count1++; if(T0Count1>=20) { T0Count1=0; Key_Loop(); //20ms调用一次按键驱动函数 } T0Count2++; if(T0Count2>=2) { T0Count2=0; xianshi_Loop();//2ms调用一次数码管驱动函数 } T0Count3++; if(T0Count3>=10) { T0Count3=0; Sec_Loop(); //10ms调用一次数秒表驱动函数 } }