Stop watch with button

Projects Programming
1

Hello, I wanted a stop watch in which when I press a push button the clock will stop, then when I press it again it will continue the timer and not restart it. What do I need to change in the code order to do this? I got the code from here.

Here is the code


#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Fonts/FreeSans9pt7b.h>
#include <Fonts/FreeSans18pt7b.h>
#include <Fonts/FreeSans12pt7b.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// SCL A5
// SDA A4
#define OLED_RESET 0  // GPIO0
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define LOGO_HEIGHT   16
#define LOGO_WIDTH    16


const unsigned char PROGMEM icon [] = {
0x00, 0x1F, 0xF8, 0x00, 0x00, 0x1F, 0xF8, 0x00, 0x00, 0x1F, 0xF8, 0x00, 0x00, 0x1F, 0xF8, 0x00,
0x00, 0x1F, 0xF8, 0x00, 0x00, 0x03, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0xE0,
0x00, 0x1F, 0xF8, 0xF0, 0x00, 0x7F, 0xFE, 0x70, 0x00, 0xFF, 0xFF, 0x20, 0x01, 0xF0, 0x0F, 0x80,
0x03, 0xC1, 0x83, 0xC0, 0x03, 0x81, 0x81, 0xC0, 0x07, 0x01, 0x80, 0xE0, 0x07, 0x01, 0x80, 0xE0,
0x0E, 0x01, 0x80, 0x70, 0x0E, 0x01, 0x80, 0x70, 0x0E, 0x03, 0xC0, 0x70, 0x0E, 0x03, 0xC0, 0x70,
0x0E, 0x03, 0xC0, 0x70, 0x0E, 0x01, 0x80, 0x70, 0x0E, 0x00, 0x00, 0x70, 0x07, 0x00, 0x00, 0xE0,
0x07, 0x00, 0x00, 0xE0, 0x07, 0x80, 0x01, 0xE0, 0x03, 0xC0, 0x03, 0xC0, 0x01, 0xE0, 0x07, 0x80,
0x00, 0xF8, 0x1F, 0x00, 0x00, 0x7F, 0xFE, 0x00, 0x00, 0x1F, 0xF8, 0x00, 0x00, 0x07, 0xE0, 0x00

};

const unsigned char PROGMEM swatch [] = {
0x03, 0xC0, 0x03, 0xC0, 0x03, 0xC0, 0x00, 0x08, 0x07, 0xEC, 0x0E, 0x70, 0x18, 0x18, 0x30, 0x0C,
0x30, 0x8C, 0x21, 0x84, 0x21, 0x84, 0x30, 0x0C, 0x10, 0x08, 0x18, 0x18, 0x0F, 0xF0, 0x03, 0xC0
};



void setup()   {
  pinMode(6,INPUT_PULLUP);  //Switch
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3C (for the 64x48)
  display.display();


  display.clearDisplay();
  display.setFont(&FreeSans9pt7b);
  display.drawPixel(10, 10, SSD1306_WHITE);
  display.setTextColor(WHITE);
  display.setCursor(0,0);
  display.print("Viral Science");
    display.display();
    delay(800);
}
int poz=1;
int broj=1;
int kretanjeY=30;

int sec1=0;
int min1=0;
unsigned long msec=0;
unsigned long mili=0;
int pres=0;
int fase=0;
int start=0;
unsigned long tim=0;
void loop()
  {
      display.clearDisplay();
      if(digitalRead(6)==0)
      {
        if(pres==0)
           {
            fase=fase+1;
            pres=1;
            if(fase>2)
            fase=0;
            }
        
        }else{pres=0;}

     if(fase==0)
      {
        display.setFont(&FreeSans12pt7b);
        display.setFont();
      display.setCursor(50,50);
      display.print("Start");
      display.drawBitmap(48, 8,  icon, 32, 32, WHITE);
      


      sec1=0;
      min1=0;
      tim=0;
      mili=0;
      msec=0;
      start=0;
      }

      if(fase==1)
      {
        display.clearDisplay();
        display.setFont(&FreeSans12pt7b);
        display.setFont();
        display.setCursor(37,0);
        display.print("Stopwatch");
        display.setFont(&FreeSans9pt7b);
        
        if(start==0)
          {
            start=1;
            tim=millis();  
          }
       msec=(millis()-tim); 

        
      
        min1=msec/60000;
     
       
        if((msec/1000)>59)
           {
            sec1=(msec/1000)-(min1*60);
            }else{
              sec1=msec/1000;
              }

          mili=(msec%1000)/10;
      
           display.setCursor(42,30);
           if(min1<=9)
           {
            display.print("0");
            display.print(min1);
            }else {display.print(min1);}

            display.print(":");

             if(sec1<=9)
           {
            display.print("0");
            display.print(sec1);
            }else {display.print(sec1);}
            display.setFont(&FreeSans12pt7b);
            display.setCursor(50,57);

                  if(mili<=9)
           {
            display.print("0");
            display.print(mili);
            }else {display.print(mili);}   
       }

if(fase==2)
{
     display.clearDisplay();
     display.setFont(&FreeSans12pt7b);
        display.setFont();
        display.setCursor(52,0);
        display.print("Time:");
        display.setFont(&FreeSans9pt7b);
        display.setCursor(42,30);
           if(min1<=9)
           {
            display.print("0");
            display.print(min1);
            }else {display.print(min1);}

            display.print(":");

             if(sec1<=9)
           {
            display.print("0");
            display.print(sec1);
            }else {display.print(sec1);}
            display.setFont(&FreeSans12pt7b);
            display.setCursor(50,57);

                  if(mili<=9)
           {
            display.print("0");
            display.print(mili);
            }else {display.print(mili);}
             display.drawBitmap(105, 20,  swatch, 16, 16, 1);
             display.drawBitmap(12, 20,  swatch, 16, 16, 1);
             
  
  }
      
      
      display.display();
  }
2

This is called a "lap timer."

3

The code is not well-written. You can make one more 'fase' to add the lap time.
If I wanted to change that sketch, then I want to go through every line of code and make it more normal code.

I used the original sketch for a Wokwi project, so everyone can try it:

4

@Koepel , please post the code here.

If I want to respond I first must go off to Wokwi to see what is posted there so that I do not duplicate. Or not contribute at all.

I don''t want to go to an external site to see what a helper posts any more than I want to go to an external site to get information from the OP.

5

Sorry, I should have explained that it is the same sketch (but with the "viral science" reference).

The Youtube page: https://www.youtube.com/watch?v=Re3gBo5vwhg
There you see a link to the sketch.
The Wokwi page is to play with the code of the Youtube video.

:arrow_right: Now the real problem. What can we do with that sketch ? It starts by adding debouncing for the button. Then rewrite parts for normal code. Then adding a Finite State Machine. Then using normal names for the variables. I'm already tired thinking about it.

6

Which Arduino (UNO/NANO/MEGA) you are using?

And what is the time format?
HRS:MIN:SEC (xx:xx:xx)

or

MIN:SEC:1/00 of SEC (xx:xx:xx)

7

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