Membuat Stopwatch Arduino Dot Matrix + DMD Uno Shield

 

================================== SOURCE CODE ==================================
#include "DMD3.h" //https://github.com/bmzstore/DMD-Uno-Shield
#include "bmzSegment16.h"
DMD3 display (2,1);
char font[]={'0','1','2','3','4','5','6','7','8','9'};
#define s1 A1
#define s2 A2
#define s3 A3
boolean st=0;
boolean p=0;

void scan()
{
    display.refresh();
}

void setup() {
    pinMode(s1,INPUT_PULLUP);
    pinMode(s2,INPUT_PULLUP);
    pinMode(s3,INPUT_PULLUP);
    pinMode(s4,INPUT_PULLUP);
    pinMode(s5,INPUT_PULLUP);
    Timer1.initialize(400);
    Timer1.attachInterrupt(scan);  
    Timer1.pwm(9,255);
    Serial.begin(9600); 
}

unsigned long jam=0, menit=0,detik=0,milidetik=0;
unsigned long h,m,s,ms;

void loop() {
  
    if(digitalRead(s1)==LOW){  
      if(st==0){    
    }
      st=1;p=0;   
    } //start
    if(digitalRead(s2)==LOW){ p=1;}// pause
    if(digitalRead(s3)==LOW){ st=0;p=0;jam=00;menit=00;detik=00;milidetik=00;}// reset
   
tampilanBesar(jam,menit,detik);  

if(st==0){
}
else{
    if(p==0){
    milidetik++;   
    if(milidetik>1){
      detik++;
      milidetik=00;    
    if(detik>59){
      menit++;
      detik=00;
        } 
   if(menit>59){
      jam++;
      menit=00;
        } 
    if(jam>23){
      jam=00;
     
        }}}    
}}

void tampilanBesar(int jm,int mn,int dt){
    //if(digitalRead(s4)==LOW){  setmenit++;delay(500);} 
    //if(digitalRead(s5)==LOW){  setmenit--;delay(500);}
    
    char buff[7];
    sprintf(buff,"%02d%02d%02d",jm,mn,dt);
    display.setFont(bmzSegment16);
    display.drawText(0, 0, (String)buff[0]);
    display.drawText(10, 0, (String)buff[1]);
    display.drawText(23, 0, (String)buff[2]);
    display.drawText(33, 0, (String)buff[3]);
    display.drawText(46, 0, (String)buff[4]);
    display.drawText(56, 0, (String)buff[5]);
    display.drawCircle(20,3,1);
    display.drawCircle(20,12,1);
    display.drawCircle(43,3,1);
    display.drawCircle(43,12,1);   
    display.drawCircle(20,3,0);
    display.drawCircle(20,12,0);
    display.drawCircle(43,3,0);
    display.drawCircle(43,12,0);           
}