Applying millis in my code

abereinsma · January 12, 2022, 7:07pm

Hi,

For a school project i'm working on menu that only uses slide potmeters. This is a requirement and we are not allowed to use any other electronics.

The project is a calculator with multiple formula's, if you want to take a look follow to link.
My school project.

For the selection of the menu i made the following code

if ((potM0 <= 0)&&(potM1 <= 0)&&(potM2 <= 0)) {
  lcd.clear();
  menu--;
  tekst1 = 0;
  delay(1000);
}

I made multiple IF statements that are linked to the menu variable.

Now my problem is that when all the potmeters are on zero the menu goes back, but i don't want that to happen because then i can never calculate the lowest number. What i want is to add a layer so the menu only changes when the following happens:

-all sliders on the lowest
-timer start
-slider 1 down and up
-Did this happen between an x amount of time?
-yes, menu changes
-no, menu stays the same

I am told to do this with millis and i tried but i can't seem to figure it out.

With kind regards,


#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);

int menu = 0;
int potM0 =A0;
int potM1 =A1;
int potM2 =A2;


int tekst1 =0;

unsigned long startMillis; 

byte Vierkant[8] = {
  0b00000,
  0b11111,
  0b11111,
  0b11111,
  0b11111,
  0b11111,
  0b00000,
  0b00000
};

byte Cirkel[8] = {
  0b00000,
  0b01110,
  0b11111,
  0b11111,
  0b11111,
  0b01110,
  0b00000,
  0b00000
};

byte Driehoek[8] = {
  0b00000,
  0b00100,
  0b00100,
  0b01110,
  0b01110,
  0b11111,
  0b11111,
  0b00000
};
//.......................Formule 1............................................................
float a, b, c, r, gr, bo, A, B, C;
float calculatie(float X, float Y, float Z)
{
  float R;
  gr = X/2;
  bo = Y/2;
  R = (PI*Z*(sq(gr)+sq(bo)+(gr)*(bo)))/3;
  return R;
}
//.......................Formule 2............................................................
float ab, hb, ob, stb, Ab;
float calculatieHoogte(float Xb)
{
  float Hb;
  stb=Xb/2;
  Hb = 1000000/(PI*sq(stb));
  return Hb;
}

float calculatieOppervlakte(float Xb)
{
  float Ob;
  stb=Xb/2;
  Ob = 2*PI*stb*(stb+(1000000/(PI*sq(stb))));
  return Ob;
}
//.......................Formule 3............................................................
float ac, rc, dc, Ac;
float calculatie(float Xc)
{
  float Rc;
  dc = ((-7172.00*sq(Xc)+717200.00*Xc+80371225.00)/2209.00);
  Rc = (((-143440.00-640.00*Xc)/8836.00)-sqrt(dc))/(-4386.00/2209.00);
  return Rc;
}
//.......................Formule 4......................................
float ad, wd, kd, afd, Ad;
float maximaleWrijving(float Xd)
{
  float Wd;
  afd=Xd/100.00;
  Wd = 313.92-(533.664/sqrt(16.00+sq(afd)));
  return Wd;
}

float horizontaleKracht(float Xd)
{
  float Kd;
  afd=Xd/100.00;
  Kd = (333.54*afd)/sqrt(16.00+sq(afd));
  return Kd;
}
//...............Formule 5..........................................
float ae, be, ce, re, Ae, Be, Ce;
float calculatiee(float Xe, float Ye, float Ze)
{
  float Re;
  float dte = 0.1;
  float ge  = 9810;
  while (Ze>0) {
    Ze=Ze-(sq(Xe)/sq(Ye))*dte*sqrt(2*ge*Ze);
    Re = Re+dte;
}
  return Re;
}

//Welkom tekst 
  void scrolling_loop1()
{
   String text = "Schuif alle sliders naar omhoog om naar de volgende formule te gaan";
   int i, j=0;
  for (i =0; i<text.length(); i++)
  {
      if(i<19)
      {
          lcd.setCursor(i,1);
          lcd.print(text.charAt(i));
          delay(150);
      }
       else
       {
           for(i=20;i<text.length();i++)
           {   
               j++;
               lcd.setCursor(0,1);
               lcd.print(text.substring(j,j+20));
             delay(250);
           }
       }
  }
} 

  void scrolling_loop2()
{
   String text = "Schuif alle sliders naar omlaag om terug naar de vorige formule te gaan";
   int i, j=0;
  for (i =0; i<text.length(); i++)
  {
      if(i<19)
      {
          lcd.setCursor(i,1);
          lcd.print(text.charAt(i));
          delay(150);
      }
       else
       {
           for(i=20;i<text.length();i++)
           {   
               j++;
               lcd.setCursor(0,1);
               lcd.print(text.substring(j,j+20));
             delay(250);
           }
       }
  }
} 

  void scrolling_loop3()
{
   String text = "Het volume van een afgeknotte kegel";
   int i, j=0;
  for (i =0; i<text.length(); i++)
  {
      if(i<19)
      {
          lcd.setCursor(i,2);
          lcd.print(text.charAt(i));
          delay(150);
      }
       else
       {
           for(i=20;i<text.length();i++)
           {   
               j++;
               lcd.setCursor(0,2);
               lcd.print(text.substring(j,j+20));
             delay(250);
           }
       }
  }
} 

  void scrolling_loop4()
{
   String text = "Cilindrisch volume verpakking";
   int i, j=0;
  for (i =0; i<text.length(); i++)
  {
      if(i<19)
      {
          lcd.setCursor(i,2);
          lcd.print(text.charAt(i));
          delay(150);
      }
       else
       {
           for(i=20;i<text.length();i++)
           {   
               j++;
               lcd.setCursor(0,2);
               lcd.print(text.substring(j,j+20));
             delay(250);
           }
       }
  }
} 

  void scrolling_loop5()
{
   String text = "     Kabelbaan";
   int i, j=0;
  for (i =0; i<text.length(); i++)
  {
      if(i<19)
      {
          lcd.setCursor(i,2);
          lcd.print(text.charAt(i));
          delay(150);
      }
       else
       {
           for(i=20;i<text.length();i++)
           {   
               j++;
               lcd.setCursor(0,2);
               lcd.print(text.substring(j,j+20));
             delay(250);
           }
       }
  }
} 

  void scrolling_loop6()
{
   String text = "     Trekkabel";
   int i, j=0;
  for (i =0; i<text.length(); i++)
  {
      if(i<19)
      {
          lcd.setCursor(i,2);
          lcd.print(text.charAt(i));
          delay(150);
      }
       else
       {
           for(i=20;i<text.length();i++)
           {   
               j++;
               lcd.setCursor(0,2);
               lcd.print(text.substring(j,j+20));
             delay(250);
           }
       }
  }
} 

  void scrolling_loop7()
{
   String text = "  Leegstromend vat";
   int i, j=0;
  for (i =0; i<text.length(); i++)
  {
      if(i<19)
      {
          lcd.setCursor(i,2);
          lcd.print(text.charAt(i));
          delay(150);
      }
       else
       {
           for(i=20;i<text.length();i++)
           {   
               j++;
               lcd.setCursor(0,2);
               lcd.print(text.substring(j,j+20));
             delay(250);
           }
       }
  }
} 

void scrolling_loop8()
{
   String text = "De kosten van 3D printen";
   int i, j=0;
  for (i =0; i<text.length(); i++)
  {
      if(i<19)
      {
          lcd.setCursor(i,2);
          lcd.print(text.charAt(i));
          delay(150);
      }
       else
       {
           for(i=20;i<text.length();i++)
           {   
               j++;
               lcd.setCursor(0,2);
               lcd.print(text.substring(j,j+20));
             delay(250);
           }
       }
  }
} 
//.......................Formule 5......................................
void setup()
{
  lcd.init();
  lcd.backlight();

  lcd.setCursor(4,1);
  lcd.print("Welkom in de");
  lcd.setCursor(1,2);
  lcd.print("Custom calculator!");
  delay(2000);
  lcd.clear();

  //lcd.setCursor(7,0);
  //lcd.print("Uitleg");
  //scrolling_loop1();
 // delay(1000);
  //lcd.clear();

  //lcd.setCursor(7,0);
  //lcd.print("Uitleg");
  //scrolling_loop2();
  //delay(1000);
  //lcd.clear();

}
void loop()
{
  potM0 = map(analogRead(A0), 0, 1023, 0, 50);
  potM1 = map(analogRead(A1), 0, 1023, 0, 50);
  potM2 =map(analogRead(A2), 0, 1023, 0, 50);

//if ((potM0 >= 50)&&(potM1 >=50)&&(potM2>=50)) {
  //lcd.clear();
 // menu++;
 // tekst1 = 0;
  //delay(1000);
//}

if ((potM0 >= 50)&&(potM1 >=0)&&(potM2>=50)) {
  lcd.clear();
  menu = 10 ;
  tekst1 = 0;
  delay(1000);
}


if ((potM0 >= 50)&&(potM1 >=50)&&(potM2>=50)) {
  millis();
  if (((potM0 >= 50)&&(potM1 >=50)&&(potM2>=50)) && (millis <= 500)){
    lcd.clear();
      menu++;
     tekst1 = 0;
     //delay(1000);
  }
}


if ((potM0 <= 0)&&(potM1 <= 0)&&(potM2 <= 0)) {
  lcd.clear();
  menu--;
  tekst1 = 0;
  delay(1000);
}
//.......................Formule 1............................................................

if(menu==-1){
  menu =0;
}


if (menu==0){

  if(tekst1==0){
  lcd.setCursor(5,1);
  lcd.print("Formule 1");
  scrolling_loop3();
  delay(2000);
  lcd.clear();
  tekst1++;
  }

  a = map(analogRead(A0), 0, 1023, 0, 50);
  lcd.createChar(0, Vierkant);
  lcd.setCursor(0,0);
  lcd.write((byte)0);
  lcd.setCursor(2,0);
  lcd.print("Diameter1=");
  lcd.print(a,0);
  b = map(analogRead(A1), 0, 1023, 0, 25);
  lcd.createChar(1, Cirkel);
  lcd.setCursor(0,1);
  lcd.write((byte)1);
  lcd.setCursor(2,1);
  lcd.print("Diameter2=");
  lcd.print(b,0);
  c = map(analogRead(A2), 0 , 1023, 0, 100);
  lcd.createChar(2, Driehoek);
  lcd.setCursor(0,2);
  lcd.write((byte)2);
  lcd.setCursor(2,2);
  lcd.print("Hoogte=");
  lcd.print(c,0);
  r = calculatie(a,b,c);
  lcd.setCursor(2,3);
  lcd.print("Volume=");
  lcd.print(r,2);
  A = a;
  B = b;
  C = c;
  
  a = map(analogRead(A0), 0, 1023, 0, 50);
  if (a != A)
  {
    lcd.setCursor(12,0);
    lcd.print("  ");
    lcd.setCursor(12,0);
    lcd.print(a,0);
    r = calculatie(a,b,c);
    lcd.setCursor(9,3);
    lcd.print("         ");
    lcd.setCursor(9,3);
    lcd.print(r,2);
    A = a;
  }
  b = map(analogRead(A1), 0, 1023, 0, 25);
  if (b != B)
  {
    lcd.setCursor(12,1);
    lcd.print("  ");
    lcd.setCursor(12,1);
    lcd.print(b,0);
    r = calculatie(a,b,c);
    lcd.setCursor(9,3);
    lcd.print("         ");
    lcd.setCursor(9,3);
    lcd.print(r,2);
    B = b;
  }
  c = map(analogRead(A2), 0, 1023, 0, 100);
  if (c != C)
  {
    lcd.setCursor(9,2);
    lcd.print("   ");
    lcd.setCursor(9,2);
    lcd.print(c,0);
    r = calculatie(a,b,c);
    lcd.setCursor(9,3);
    lcd.print("         ");
    lcd.setCursor(9,3);
    lcd.print(r,2);
    C = c;
  }
}
//.......................Formule 2..........................................................
else if (menu==1){
 
  if(tekst1==0){
  lcd.setCursor(5,1);
  lcd.print("Formule 2");
  scrolling_loop4();
  delay(2000);
  lcd.clear();
  tekst1++;
  }


  ab = map(analogRead(A0), 0, 1023, 75, 125);
  lcd.createChar(0, Vierkant);
  lcd.setCursor(0,0);
  lcd.write((byte)0);
  lcd.setCursor(2,0);
  lcd.print("Diameter=");
  lcd.print(ab,0);
  hb = calculatieHoogte(ab);
  lcd.setCursor(2,1);
  lcd.print("Hoogte=");
  lcd.print(hb,2);
  ob = calculatieOppervlakte(ab);
  lcd.setCursor(2,2);
  lcd.print("Oppervlak=");
  lcd.print(ob,2);
  Ab = ab;

    ab = map(analogRead(A0), 0, 1023, 75, 125);
  if (ab != Ab)
  {
    lcd.setCursor(11,0);
    lcd.print("   ");
    lcd.setCursor(11,0);
    lcd.print(ab,0);
    hb = calculatieHoogte(ab);
    lcd.setCursor(9,1);
    lcd.print("           ");
    lcd.setCursor(9,1);
    lcd.print(hb,2);
    ob = calculatieOppervlakte(ab);
    lcd.setCursor(12,2);
    lcd.print("     ");
    lcd.setCursor(12,2);
    lcd.print(ob,2);
    Ab = ab;
  }
}
//.......................Formule 3.......................................................
else if (menu==2){

    if(tekst1==0){
  lcd.setCursor(5,1);
  lcd.print("Formule 3");
  scrolling_loop5();
  delay(2000);
  lcd.clear();
  tekst1++;
  }

  ac = map(analogRead(A0), 0.00, 1023.00, 0.00, 1000.00);
  lcd.createChar(0, Vierkant);
  lcd.setCursor(0,0);
  lcd.write((byte)0);
  lcd.setCursor(2,0);
  lcd.print("X = ");
  lcd.print(ac/10.00,1);
  rc = calculatie(ac/10.00);
  lcd.setCursor(2,1);
  lcd.print("Y = ");
  lcd.print(rc,7);
  Ac = ac;

  ac = map(analogRead(A1), 0.00, 1023.0, 0.00, 1000.00);
  if (ac != Ac)
  {
    lcd.setCursor(6,0);
    lcd.print("     ");
    lcd.setCursor(6,0);
    lcd.print(ac/10.00,1);
    rc = calculatie(ac/10.00);
    lcd.setCursor(6,1);
    lcd.print("          ");
    lcd.setCursor(6,1);
    lcd.print(rc,7);
    Ac = ac;
  }
}
//.......................Formule 4.......................................................
else if (menu==3){

      if(tekst1==0){
  lcd.setCursor(5,1);
  lcd.print("Formule 4");
  scrolling_loop6();
  delay(2000);
  lcd.clear();
  tekst1++;
  }

  ad = map(analogRead(A0), 0.00, 1023.00, 0.00, 500.00);
  lcd.createChar(0, Vierkant);
  lcd.setCursor(0,0);
  lcd.write((byte)0);
  lcd.setCursor(2,0);
  lcd.print("x    = ");
  lcd.print(ad,0);
  wd = maximaleWrijving(ad);
  lcd.setCursor(2,1);
  lcd.print("Fmax = ");
  lcd.print(wd,2);
  kd = horizontaleKracht(ad);
  lcd.setCursor(2,2);
  lcd.print("Fhor = ");
  lcd.print(kd,2);
  Ad = ad;

   ad = map(analogRead(A0), 0.00, 1023.00, 0.00, 500.00);
  if (ad != Ad)
  {
    lcd.setCursor(9,0);
    lcd.print("   ");
    lcd.setCursor(9,0);
    lcd.print(ad,0);
    wd = maximaleWrijving(ad);
    lcd.setCursor(9,1);
    lcd.print("      ");
    lcd.setCursor(9,1);
    lcd.print(wd,2);
    kd = horizontaleKracht(ad);
    lcd.setCursor(9,2);
    lcd.print("      ");
    lcd.setCursor(9,2);
    lcd.print(kd,2);
    Ad = ad;
  }
 }
//.......................Formule 5.......................................................
else if (menu==4){
      if(tekst1==0){
  lcd.setCursor(5,1);
  lcd.print("Formule 5");
  scrolling_loop7();
  delay(2000);
  lcd.clear();
  tekst1++;
  }

  {
  ae = map(analogRead(A0), 0, 1023, 5, 50);
  lcd.createChar(0, Vierkant);
  lcd.setCursor(0,0);
  lcd.write((byte)0);
  lcd.setCursor(2,0);
  lcd.print("Diameter1=");
  lcd.print(ae,0);
  be = map(analogRead(A1), 0, 1023, 400, 800);
  lcd.createChar(1, Cirkel);
  lcd.setCursor(0,1);
  lcd.write((byte)1);
  lcd.setCursor(2,1);
  lcd.print("Diameter2=");
  lcd.print(be,0);
  ce = map(analogRead(A2), 0 , 1023, 500, 1000);
  lcd.createChar(2, Driehoek);
  lcd.setCursor(0,2);
  lcd.write((byte)2);
  lcd.setCursor(2,2);
  lcd.print("Hoogte=");
  lcd.print(ce,0);
  lcd.setCursor(2,3);
  lcd.print("Tijd=");
  re = calculatiee(ae,be,ce);
  lcd.print(re,0);
  lcd.setCursor(13,3);
  lcd.print("sec.");
  Ae = ae;
  Be = be;
  Ce = ce;
  }

  {
  ae = map(analogRead(A0), 0, 1023, 5, 50);
  if (ae != Ae)
  {
    lcd.setCursor(12,0);
    lcd.print("  ");
    lcd.setCursor(12,0);
    lcd.print(ae,0);
    re = calculatiee(ae,be,ce);
    lcd.setCursor(7,3);
    lcd.print("     ");
    lcd.setCursor(7,3);
    lcd.print(re,0);
    Ae = ae;
  }
  be = map(analogRead(A1), 0, 1023, 400, 800);
  if (be != Be)
  {
    lcd.setCursor(12,1);
    lcd.print("  ");
    lcd.setCursor(12,1);
    lcd.print(be,0);
    re = calculatiee(ae,be,ce);
    lcd.setCursor(7,3);
    lcd.print("     ");
    lcd.setCursor(7,3);
    lcd.print(re,0);
    Be = be;
  }
  ce = map(analogRead(A2), 0, 1023, 500, 1000);
  if (ce != Ce)
  {
    lcd.setCursor(9,2);
    lcd.print("    ");
    lcd.setCursor(9,2);
    lcd.print(ce,0);
    re = calculatiee(ae,be,ce);
    lcd.setCursor(7,3);
    lcd.print("     ");
    lcd.setCursor(7,3);
    lcd.print(re,0);
    Ce = ce;
  }

  }
  }

else if (menu==5){
  if(tekst1==0){
  lcd.setCursor(2,1);
  lcd.print(" Eigen opdracht");
  scrolling_loop8();
  delay(2000);
  lcd.clear();
  tekst1++;

  lcd.setCursor(0,1);
  lcd.print("hier komt de opdracht");
  }


  }


else if (menu==10){
  lcd.setCursor(3,0);
  lcd.print("Gemaakt door:");

  lcd.setCursor(4,1);
  lcd.print("Stefan kars");

  lcd.setCursor(0,2);
  lcd.print("Camile Zaadnoordijk");

  lcd.setCursor(4,3);
  lcd.print("Abe Reinsma");

}
}

LarryD · January 12, 2022, 7:11pm

“I am told to do this with millis and i tried but i can't seem to figure it out.”

Show us the complete sketch.

abereinsma · January 12, 2022, 7:12pm

I added it the the post

J-M-L · January 12, 2022, 7:30pm

can you explain (without code) how you plan to use the sliders?

abereinsma · January 12, 2022, 7:32pm

To change variables. If you take a look at the sketch is will al make mutch more sense.

Paul_KD7HB · January 12, 2022, 7:33pm

First, have you determined that each of the potentiometers will actually go to zero and go to a maximum value. Will they all go to zero and the same maximum or will you have to process each as an individual pot?

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Applying millis in my code

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