基于AT89S52单片机的两位数码管99秒计时器，带矩阵键盘 -

标题: 基于AT89S52单片机的两位数码管99秒计时器，带矩阵键盘 [打印本页]

作者: Loser007 时间: 2018-5-11 20:48
标题: 基于AT89S52单片机的两位数码管99秒计时器，带矩阵键盘
基于AT89S52单片机的两位数码管99秒计时器，带矩阵键盘
代码简单易懂，适合初学矩阵键盘和数码管的同学

代码：
C51 Code
C++ Code

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#include <AT89X52.H>
#include "KEY44.H"
#include "7SEG.H"

bit Flag;
sbit LED = P3 ^ 0;
unsigned char time;
unsigned char NTime;
void timer_init(void)
{
TMOD = 0x01;
TH0 = (65536 - 10000) / 256;
TL0 = (65536 - 10000) % 256;
ET0 = 1;
EA = 1;
TR0 = 1;
}
void time_Stop(void)
{
TMOD = 0x00;
TH0 = 0;
TL0 = 0;
ET0 = 0;
EA = 0;
TR0 = 0;
}
void main(void)
{
NTime = 0;
while(1)
{
      unsigned char key = Matrix_keyboard();
      if(key == 1)
      {
         timer_init();
         LED = 1;
      }
      if(key == 2)
      {
         time_Stop();
         Flag = 0;
         NTime = 0;
         LED = 0;
      }
      if (Flag == 1)
      {
         Flag = 0;
         Seg_Show(NTime);
         NTime += 1;
         if(NTime == 99 + 1)
         {
            NTime = 0;
         }
      }
}
}
void t_0(void) interrupt 1 using 0
{
TR0 = 0;
TH0 = (65536 - 10000) / 256;
TL0 = (65536 - 10000) % 256;
time++;
if(time == 100)
{
      time = 0;
      Flag = 1;
}
TR0 = 1;
}

/*----------------------------------------
File: 7SEG.h
Date:Loser007    May 5, 2018 18:04

----------------------------------------*/
#ifndef __7SEG_H__
#define __7SEG_H__
#pragma SAVE
#pragma REGPARMS
extern void Seg_Show(unsigned char Time);
unsigned char code seg_cc[] =  //Common cathode digital tube segment code
{
0x3F, //0
0x06, //1
0x5B, //2
0x4F, //3
0x66, //4
0x6D, //5
0x7D, //6
0x07, //7
0x7F, //8
0x6F, //9
0x77, //A
0x7C, //B
0x39, //C
0x5E, //D
0x79, //E
0x71, //F
};
/*----------------------------------------
Name: Seg_Show
Features: Show time in 2 SEG
Parameter: No
Return: N0
Instructions:SEG I/0 From P1^0 to P1^7 & P2^0 to P2^7
Date:Loser007    May 5, 2018 10:40
----------------------------------------*/
void Seg_Show(unsigned char Time)
{
P0 = seg_cc[Time / 10];
P2 = seg_cc[Time % 10];
}
#endif

/*----------------------------------------
File: key44.h
Date:Loser007    May 5, 2018 12:59

----------------------------------------*/

#ifndef __KEY44_H__
#define __KEY44_H__
#pragma SAVE
#pragma REGPARMS
extern char Matrix_keyboard(void);

/*----------------------------------------
Name: Matrix_keyboard
Features: Get a case from the 4*4 keyboard
Parameter: No
Return:Key code (char)
Instructions:Keyboard I/0 From P1^0 to P1^7
Date:Loser007    May 5, 2018 10:40
----------------------------------------*/
char Matrix_keyboard(void)
{
unsigned char Key = 0, X = 0, Y = 0;
P1 = 0xF0;  //11110000
X = P1 & 0xF0;  //Get row (P1 XOR 11110000) Get Height
if(X != 0xF0)
{
      X = P1 ^ 0xF0;
      P1 = 0x0F;  //00001111
      Y = P1 & 0x0F;
      if(Y != 0x0F)
      {
         Y = P1 ^ 0x0F;  //Get Column (P1 XOR 00001111) Get Low
         Key = X + Y;
      }
}
switch (Key)
{
// 1
case 0x81:
      return 0; //1000 0001
case 0x82:
      return 1; //1000 0010
case 0x84:
      return 2; //1000 0100
case 0x88:
      return 3; //1000 1000
// 2
case 0x41:
      return 4; //0100 0001
case 0x42:
      return 5; //0100 0010
case 0x44:
      return 6; //0100 0100
case 0x48:
      return 7; //0100 1000
// 3
case 0x21:
      return 8; //0010 0001
case 0x22:
      return 9; //0010 0010
case 0x24:
      return 10;  //0010 0100
case 0x28:
      return 11;  //0010 1000
//4
case 0x11:
      return 12;  //0001 0001
case 0x12:
      return 13;  //0001 0010
case 0x14:
      return 14;  //0001 0100
case 0x18:
      return 15;  //0001 1000

default:
      return 255;
}
}
#endif

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代码，库，仿真

作者: Zhi_G 时间: 2019-1-3 09:40
为什么解压之后仿真图没有啊

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