4-Digit Display header file

FND.zip

Stopwatch.ino

//  Author:Frankie.Chu

//  Date:9 April,2012

//

//  This library is free software; you can redistribute it and/or

//  modify it under the terms of the GNU Lesser General Public

//  License as published by the Free Software Foundation; either

//  version 2.1 of the License, or (at your option) any later version.

//

//  This library is distributed in the hope that it will be useful,

//  but WITHOUT ANY WARRANTY; without even the implied warranty of

//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

//  Lesser General Public License for more details.

//

//  You should have received a copy of the GNU Lesser General Public

//  License along with this library; if not, write to the Free Software

//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

//

//  Modified record:

//

/*******************************************************************************/

#include <EEPROM.h>

#include "TimerOne.h"

#include <avr/pgmspace.h>

#include "TM1637.h"

#define ON 1

#define OFF 0

int8_t TimeDisp[] = {0x00,0x00,0x00,0x00};

unsigned char ClockPoint = 1;

unsigned char Update;

unsigned char microsecond_10 = 0;

unsigned char second;

unsigned char _microsecond_10 = 0;

unsigned char _second;

unsigned int eepromaddr;

boolean Flag_ReadTime;

#define CLK 2//pins definitions for TM1637 and can be changed to other ports        

#define DIO 3

TM1637 tm1637(CLK,DIO);

void setup()

{

  Serial.begin(9600);

  tm1637.set(BRIGHT_TYPICAL);//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;

  tm1637.init();

  Timer1.initialize(10000);//timing for 10ms

  Timer1.attachInterrupt(TimingISR);//declare the interrupt serve routine:TimingISR  

  Serial.println("Please send command to control the stopwatch:");

  Serial.println("S - start");

  Serial.println("P - pause");

  Serial.println("L - list the time");

  Serial.println("W - write the time to EEPROM ");

  Serial.println("R - reset");

}

void loop()

{

  char command;

  command = Serial.read();

  switch(command)

  {

    case 'S':stopwatchStart();Serial.println("Start timing...");break;

    case 'P':stopwatchPause();Serial.println("Stopwatch was paused");break;

    case 'L':readTime();break;

    case 'W':saveTime();Serial.println("Save the time");break;

    case 'R':stopwatchReset();Serial.println("Stopwatch was reset");break;

    default:break;

  }

  if(Update == ON)

  {

    TimeUpdate();

    tm1637.display(TimeDisp);

  }

}

//************************************************

void TimingISR()

{

  microsecond_10 ++;

  Update = ON;

  if(microsecond_10 == 100){

    second ++;

    if(second == 60)

    {

      second = 0;

    }

    microsecond_10 = 0;  

  }

  ClockPoint = (~ClockPoint) & 0x01;

  if(Flag_ReadTime == 0)

  {

    _microsecond_10 = microsecond_10;

    _second = second;

  }

}

void TimeUpdate(void)

{

  if(ClockPoint)tm1637.point(POINT_ON);//POINT_ON = 1,POINT_OFF = 0;

  else tm1637.point(POINT_ON); 

  TimeDisp[2] = _microsecond_10 / 10;

  TimeDisp[3] = _microsecond_10 % 10;

  TimeDisp[0] = _second / 10;

  TimeDisp[1] = _second % 10;

  Update = OFF;

}

void stopwatchStart()//timer1 on

{

  Flag_ReadTime = 0;

  TCCR1B |= Timer1.clockSelectBits; 

}

void stopwatchPause()//timer1 off if [CS12 CS11 CS10] is [0 0 0].

{

  TCCR1B &= ~(_BV(CS10) | _BV(CS11) | _BV(CS12));

}

void stopwatchReset()

{

  stopwatchPause();

  Flag_ReadTime = 0;

  _microsecond_10 = 0;

  _second = 0;

  microsecond_10 = 0;

  second = 0;

  Update = ON;

}

void saveTime()

{

  EEPROM.write(eepromaddr ++,microsecond_10);

  EEPROM.write(eepromaddr ++,second);

}

void readTime()

{

  Flag_ReadTime = 1;

  if(eepromaddr == 0)

  {

    Serial.println("The time had been read");

    _microsecond_10 = 0;

    _second = 0;

  }

  else{

  _second = EEPROM.read(-- eepromaddr);

  _microsecond_10 = EEPROM.read(-- eepromaddr);

  Serial.println("List the time");

  }

  Update = ON;

}