Nicu FLORICA (niq_ro): afisaj multiplexat

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sâmbătă, 12 noiembrie 2022

Cum se foloseste metoda multiplexarii la afisajele led cu 7 segmente...

In ai multe proiecte am folosit metoda multiplexarii, care pentru anumite persoane e ceva ciudat si de neinteles, asa ca o sa incerc sa va prezint aceasta metoda, cum am folosit-o eu la ceasuri sau la termostatele cu afisaj led din 7 segmente.

Un exemplu concret este ceasul NTP cu date meteo de la senzor DHT22 pe afisaj led multiplexat (catod comun)

acolo am folosit un afisaj cu catod comun, avand codul LFD080AAG-103-01 la care i-am adaugat rezistente a fiecare segment (a...g + punctul zecimal).

Un afisaj cu anod comun este KW4-563ASA, folosit initial in articolul Afisaje LED cu 7 segmente si.. Arduino (in 2013)

Metoda este folosita de foarte mult timp, in primul rand, pentru ca reduce mult namarul de pini ai afisajului: la afisajul multiplexat cu 4 cifre sunt doar 12 pini (4 cifre si 8 segmente), pe cand la un afisaj cu comanda separata sunt folositi 28 pini (4 grupe de cate 8 segmente).

Daca vreau sa afisez ora 12:34, sunt 2 cazuri:

- cu secundele aprinse (in cazul de fata, doar punctul zecimal de la cifra a 2-a)

- fara secunde

Bun, acum, pentru cazul afisarii orei cu secunda:

respectiv fara secunda

deci sunt 4 timpi:

- primul timp: se alimenteaza prima afisaj si se aprinde cifra 1

- al doilea timp: se alimenteaza al doilea afisaj si se aprinde cifra 2 ( cu sau fara punctul zecimal)

- al treilea timp: se alimenteaza al treilea afisaj si se aprinde cifra 3

- al patrulea timp: se alimenteaza al patrulea afisaj si se aprinde cifra 4

apoi se repeta de la timpul 1.

La afisajele cu anod comun, un fisaj se comanda prin alimentarea cu plus a pinului comun si conectarea minusului, cel putin printr-o rezistenta de limitare a curentului, la toate segmentele dorite a se aprinde, iar la afisajul cu catod comun, segmentele seconecteaza la plus prin rezistenta si la masa se conecteaza pinul comun. Cifrele si anumite litere sau simboluri se fac cum e prezentat in articolul 7-segment HEX decoder

Cand doresc sa afisez temperatura:

sau umiditatea relativa:

Puteti vedea 2 filmulete recente:

- ceas RTC in format de 12/ 24 ore cu reglaj manual, data alarma si termometru (1)

- RTC clock with manual adjust, date, alarm & temperature 2022 (1)

care deriva din materialul prezentat in articolul Ceas cu reglaj manual al orei si datei, alarma si termometru pe afisaj multiplexat cu 4 cifre led

si are mai multe versiuni de sketch-uri pe https://github.com/tehniq3/multiplexedclock4b, iar schema este

la care se poate conecta or un afisaj cu catod comun ori unul cu anod comun, doar se modifica cateva linii:

respectiv

Un mod mai frumos de afisare a secundelor, consta in intoarcerea, cel putin a afisajului 3:

cum am folsit la ceasul "caramida din lemn"

dupa cum se vede si in filmuletul humidity and temperature with DHT11 using 7-segment LED from a broken wood brick clock (VIII)

miercuri, 20 mai 2015

Termostat cu afisaj LED

english version

Fata de articolul anterior (Termostat cu 2 praguri de temperatura pe afisaj LED), de data aceasta am modificat sketch-urile sa am un termostat clasic, cu temperatura reglata si, in plus, sa pot regla histerezisul.
- temperatura masurata mai mica decat cea reglata:

- temperata reglata:

- histerezis:

- temperatura masurata mai mare decat cea reglata:

- temperatura masurata este in domeniul dorit:

Schema este aceeasi:

Pentru inceput, am folosit sketch-ul cu modificarea parametrilor fara a-i memora in EEPROM-ul microcontorlerului, pastrand si partea de corectie a citirii temperaturii si medierea cu valoarea anterioara; am facut si filmuletul Termostat cu Arduino care prezinta modul de functionare si reglare:

Sketch-ul folosit este:

// http://nicuflorica.blogspot.ro/2013/07/afisaje-led-cu-7-segmente-si-arduino-ii.html
/*
 6-13-2011
 Spark Fun Electronics 2011
 Nathan Seidle

 This code is public domain but you buy me a beer if you use this and we meet 
 someday (Beerware license).

 4 digit 7 segment display:
 http://www.sparkfun.com/products/9483
 Datasheet: 
 http://www.sparkfun.com/datasheets/Components/LED/7-Segment/YSD-439AR6B-35.pdf

 This is an example of how to drive a 7 segment LED display from an ATmega
 without the use of current limiting resistors. This technique is very common 
 but requires some knowledge of electronics - you do run the risk of dumping 
 too much current through the segments and burning out parts of the display. 
 If you use the stock code you should be ok, but be careful editing the 
 brightness values.

 This code should work with all colors (red, blue, yellow, green) but the 
 brightness will vary from one color to the next because the forward voltage 
 drop of each color is different. This code was written and calibrated for the 
 red color.

 This code will work with most Arduinos but you may want to re-route some of 
 the pins.

 7 segments
 4 digits
 1 colon
 =
 12 pins required for full control 

 */
// modified connexion by niq_ro from http://nicuflorica.blogspot.com
// for my Luckylight KW4-563ASA
// dataseet: http://www.tme.eu/ro/Document/dfc2efde2e22005fd28615e298ea2655/KW4-563XSA.pdf

byte digit1 = 11; //PWM Display pin 12 (digit1 is common anonds A1 from right side)
byte digit2 = 10; //PWM Display pin 9 (digit2 is  common A2)
byte digit3 = 9; //PWM Display pin 8 (digit3 is common anods A3)
byte digit4 = 6; //PWM Display pin 6 (digit4 is common anods, from left side)

//Pin mapping from Arduino to the ATmega DIP28 if you need it
// http://www.arduino.cc/en/Hacking/PinMapping
byte segA = 2; //Display pin 11
byte segB = 3; //Display pin 7
byte segC = 4; //Display pin 4
byte segD = 5; //Display pin 2
byte segE = 12; //Display pin 1
byte segF = 7; //Display pin 10
byte segG = 8; //Display pin 5

byte dP = 13; // decimal point

#define LMPIN A0     // what pin we're LM35 is connected

#define BUT1 A1    // - switch
#define BUT2 A2    // + switch
#define BUT3 A3    // MENU switch

#define RECE A4    // output for lower temperature
#define CALD A5    // output for upper temperature
#define BINE A6    // output for ok temperature

int tset = 240;  // temperature set (x10)
int dt = 5;      // dt temperature

byte meniu = 0; // if MENIU = 0 is clasical 
                // if MENIU = 1 is for temperature set
                // if MENIU = 2 is for dt temperature 
float t, t0, t2, k;
 

void setup() {

  analogReference(INTERNAL); // for Uno (1,1V)
  //analogReference(INTERNAL1V1); // for Mega (1,1V)
  
  pinMode(segA, OUTPUT);
  pinMode(segB, OUTPUT);
  pinMode(segC, OUTPUT);
  pinMode(segD, OUTPUT);
  pinMode(segE, OUTPUT);
  pinMode(segF, OUTPUT);
  pinMode(segG, OUTPUT);

  pinMode(digit1, OUTPUT);
  pinMode(digit2, OUTPUT);
  pinMode(digit3, OUTPUT);
  pinMode(digit4, OUTPUT);
  
  pinMode(dP, OUTPUT);
  
  pinMode(BUT1, INPUT);
  pinMode(BUT2, INPUT);
  pinMode(BUT3, INPUT);

  pinMode(RECE, OUTPUT);
  pinMode(CALD, OUTPUT);
  pinMode(BINE, OUTPUT);

  digitalWrite(BUT1, HIGH); // pull-ups on
  digitalWrite(BUT2, HIGH);
  digitalWrite(BUT3, HIGH);

  digitalWrite(RECE, LOW);
  digitalWrite(CALD, LOW);
  digitalWrite(BINE, LOW);
  
 Serial.begin(9600);
 Serial.println("test for niq_ro");

k = 0.86;  // factor corectie citire la multiplexare
delay(100);
t = analogRead(A0);
t0 = t * 110 / 1023;  // pentru referinta interna de 1,1V;
t2 = t0;
}

void loop() {

  Serial.print("meniu = ");
  Serial.println(meniu);

  Serial.print("tset = ");
  Serial.println(tset/10);
  Serial.print("dt = ");
  Serial.println(dt/10);

if (digitalRead(BUT3) == LOW) 
{ meniu = meniu + 1;
delay(250);
}
if (meniu == 3) meniu = 0;

if (millis() < 2000) citire();
//  t = analogRead(LMPIN);
//  t0 = t *500 / 1023;
leduri();

  Serial.print(t);
  Serial.print("/1023 --> ");
  Serial.print("t = ");
  Serial.println(t0);



//displayNumber(t0*10);
    
if (meniu == 0) {
int numara = 0;
  while (meniu == 0) {
numara = numara + 1;
  if (numara == 1000)
    {
//  float t = analogRead(LMPIN);
//  float t0 = t *500 / 1023;
citire();
t0 = (t0 + t2) /2;
leduri();
 // delay(5);
  numara = 0;
  Serial.print("t = ");
  Serial.println(t0);
//  displayNumber(t0*10); // this is number to diplay
    }
  te(t0*10); // this is number to diplay
  t2 = t0;
if (digitalRead(BUT3) == LOW) 
{ meniu = 1;
delay(250);
}
//Serial.print("t = ");
//Serial.println(t0);
//delay(5);
} 
delay(5);  
}



if (meniu == 1) {
   while (meniu == 1) {
//     minim(tset/10); // this is number to diplay
   teset(tset);
   if (digitalRead(BUT1) == LOW)
  { tset = tset - 1; 
  delay(250);
  }
   if (digitalRead(BUT2) == LOW)
  { tset = tset + 1;
  delay(250);
  }
  if (digitalRead(BUT3) == LOW) 
  { meniu = 2;
  delay(250);
  }
//  delay(15);
     }
  Serial.print("tset = ");
  Serial.println(tset/10);
   delay (100);
}

if (meniu == 2) {
 // if (tmax <= tmin) tmax = tmin + 10;
   while (meniu ==2) {
 //    maxim(dt/10); // this is number to diplay
     dete(dt); // this is number to diplay
   if (digitalRead(BUT1) == LOW) 
   { dt = dt - 1;
   delay(250);
  }
   if (digitalRead(BUT2) == LOW) 
   { dt = dt + 1;
   delay(250);
  }
   if (digitalRead(BUT3) == LOW) 
   { meniu = 0;
   delay(250);
  }
//   delay(15);
if (dt < 1) dt = 1;
    }
  Serial.print("dt = ");
  Serial.println(dt/10);

    delay(100);
}
}
//Given a number, we display 10:22
//After running through the 4 numbers, the display is left turned off

//Display brightness
//Each digit is on for a certain amount of microseconds
//Then it is off until we have reached a total of 20ms for the function call
//Let's assume each digit is on for 1000us
//Each digit is on for 1ms, there are 4 digits, so the display is off for 16ms.
//That's a ratio of 1ms to 16ms or 6.25% on time (PWM).
//Let's define a variable called brightness that varies from:
//5000 blindingly bright (15.7mA current draw per digit)
//2000 shockingly bright (11.4mA current draw per digit)
//1000 pretty bright (5.9mA)
//500 normal (3mA)
//200 dim but readable (1.4mA)
//50 dim but readable (0.56mA)
//5 dim but readable (0.31mA)
//1 dim but readable in dark (0.28mA)



void dete(int toDisplay) {
#define DISPLAY_BRIGHTNESS  750

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW

  for(int digit = 4 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
      digitalWrite(digit1, DIGIT_ON);
      lightNumber(15); // display degree symbol
      delayMicroseconds(DISPLAY_BRIGHTNESS); 
      break;

    case 2:
      digitalWrite(digit2, DIGIT_ON);
       digitalWrite(13, LOW);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      delayMicroseconds(DISPLAY_BRIGHTNESS); 
      break;
   case 3:
      digitalWrite(digit3, DIGIT_ON);
//      digitalWrite(13, HIGH);
//      digitalWrite(13, LOW);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      delayMicroseconds(DISPLAY_BRIGHTNESS); 
      break;
   case 4:
      digitalWrite(digit4, DIGIT_ON);
      lightNumber(12); // display C letter
      delayMicroseconds(DISPLAY_BRIGHTNESS); 
      break;
    }
     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
}
} 

void te(int toDisplay) {
#define DISPLAY_BRIGHTNESS  500

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW
 for(int digit = 4 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
      digitalWrite(digit1, DIGIT_ON);
      digitalWrite(13, HIGH);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      digitalWrite(13, LOW);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      digitalWrite(13, HIGH);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      lightNumber(12); // display C letter
      digitalWrite(13, HIGH);
      break;
    }
 //   lightNumber(toDisplay % 10);
 //   toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
}
} 


//Given a number, turns on those segments
//If number == 10, then turn off number
void lightNumber(int numberToDisplay) {

#define SEGMENT_ON  LOW
#define SEGMENT_OFF HIGH

  switch (numberToDisplay){

  case 0:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 1:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 2:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 3:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 4:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 5:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 6:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 7:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 8:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 9:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  // all segment are ON
  case 10:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;
  
  // degree symbol made by niq_ro
  case 11:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  // C letter made by niq_ro
  case 12:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;
  
  // c letter made by niq_ro
  case 13:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 14:  // lower line (d segment)
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;

case 15:  // upper line (a segment)
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;
    
  }
}


void leduri() {
 digitalWrite(CALD, LOW);
 digitalWrite(RECE, LOW);
 digitalWrite(BINE, LOW);

if ( t0*10 < tset ) 
{  digitalWrite(RECE, HIGH);
   digitalWrite(CALD, LOW);
   digitalWrite(BINE, LOW);
}
if ( t0*10 > tset + dt ) 
{  digitalWrite(CALD, HIGH);
   digitalWrite(RECE, LOW);
   digitalWrite(BINE, LOW);
}
if (( t0*10 <= tset+dt ) && ( t0*10 >= tset ))
{  digitalWrite(CALD, LOW);
   digitalWrite(RECE, LOW);
   digitalWrite(BINE, HIGH);
}
}



void teset(int toDisplay) {
#define DISPLAY_BRIGHTNESS  500

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW
 for(int digit = 4 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
      digitalWrite(digit1, DIGIT_ON);
      digitalWrite(13, HIGH);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      digitalWrite(13, LOW);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      digitalWrite(13, HIGH);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      lightNumber(13); // display C letter
      digitalWrite(dP, HIGH);
      break;
    }
 //   lightNumber(toDisplay % 10);
 //   toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);

}
} 

float citire() {
  t = analogRead(A0);
  t0 = t * k *110 / 1023;  // pentru referinta interna de 1,1V;
//  t0 = t *500 / 1023;
  return t0;
}

Ulterior, am pus si memorarea valorilor reglate, dupa cum se vede si in filmuletul Termostat cu Arduino (2)

Sketch-ul folosit este:

// http://nicuflorica.blogspot.ro/2013/07/afisaje-led-cu-7-segmente-si-arduino-ii.html
// http://nicuflorica.blogspot.ro/2015/05/termostat-cu-2-praguri-de-temperatura.html
/*
 6-13-2011, Spark Fun Electronics 2011, Nathan Seidle

 This code is public domain but you buy me a beer if you use this and we meet 
 someday (Beerware license).

 4 digit 7 segment display:
 http://www.sparkfun.com/products/9483
 Datasheet: 
 http://www.sparkfun.com/datasheets/Components/LED/7-Segment/YSD-439AR6B-35.pdf

 This is an example of how to drive a 7 segment LED display from an ATmega
 without the use of current limiting resistors. This technique is very common 
 but requires some knowledge of electronics - you do run the risk of dumping 
 too much current through the segments and burning out parts of the display. 
 If you use the stock code you should be ok, but be careful editing the 
 brightness values.

 This code should work with all colors (red, blue, yellow, green) but the 
 brightness will vary from one color to the next because the forward voltage 
 drop of each color is different. This code was written and calibrated for the 
 red color.

 This code will work with most Arduinos but you may want to re-route some of 
 the pins.

 7 segments
 4 digits
 1 colon
 =
 12 pins required for full control 

 */
// modified connexion by niq_ro from http://nicuflorica.blogspot.com
// http://arduinotehniq.blogspot.com/
// for my Luckylight KW4-563ASA
// dataseet: http://www.tme.eu/ro/Document/dfc2efde2e22005fd28615e298ea2655/KW4-563XSA.pdf

byte digit1 = 11; //PWM Display pin 12 (digit1 is common anonds A1 from right side)
byte digit2 = 10; //PWM Display pin 9 (digit2 is  common A2)
byte digit3 = 9; //PWM Display pin 8 (digit3 is common anods A3)
byte digit4 = 6; //PWM Display pin 6 (digit4 is common anods, from left side)

//Pin mapping from Arduino to the ATmega DIP28 if you need it
// http://www.arduino.cc/en/Hacking/PinMapping
byte segA = 2; //Display pin 11
byte segB = 3; //Display pin 7
byte segC = 4; //Display pin 4
byte segD = 5; //Display pin 2
byte segE = 12; //Display pin 1
byte segF = 7; //Display pin 10
byte segG = 8; //Display pin 5

byte dP = 13; // decimal point

#define LMPIN A0     // what pin we're LM35 is connected

#define BUT1 A1    // - switch
#define BUT2 A2    // + switch
#define BUT3 A3    // MENU switch

#define RECE A4    // output for lower temperature
#define CALD A5    // output for upper temperature
#define BINE A6    // output for ok temperature

//int tset = 240;  // temperature set (x10)
//int dt = 5;      // dt temperature

byte meniu = 0; // if MENIU = 0 is clasical 
                // if MENIU = 1 is for temperature set
                // if MENIU = 2 is for dt temperature 
float t, t0, t2, k;
int tset, tset1, tset2, dt; 

// http://tronixstuff.com/2011/03/16/tutorial-your-arduinos-inbuilt-eeprom/
#include <EEPROM.h>


void setup() {
 
  analogReference(INTERNAL); // for Uno (1,1V)
  //analogReference(INTERNAL1V1); // for Mega (1,1V)

// just first time... after must put commnent (//)
// EEPROM.write(101,0);    
// EEPROM.write(102,245);
// EEPROM.write(103,5);
  
  
tset1 = EEPROM.read(101);
tset2 = EEPROM.read(102);
tset = 256 * tset1 + tset2;  // recover the number
dt = EEPROM.read(103);

  
  pinMode(segA, OUTPUT);
  pinMode(segB, OUTPUT);
  pinMode(segC, OUTPUT);
  pinMode(segD, OUTPUT);
  pinMode(segE, OUTPUT);
  pinMode(segF, OUTPUT);
  pinMode(segG, OUTPUT);

  pinMode(digit1, OUTPUT);
  pinMode(digit2, OUTPUT);
  pinMode(digit3, OUTPUT);
  pinMode(digit4, OUTPUT);
  
  pinMode(dP, OUTPUT);
  
  pinMode(BUT1, INPUT);
  pinMode(BUT2, INPUT);
  pinMode(BUT3, INPUT);

  pinMode(RECE, OUTPUT);
  pinMode(CALD, OUTPUT);
  pinMode(BINE, OUTPUT);

  digitalWrite(BUT1, HIGH); // pull-ups on
  digitalWrite(BUT2, HIGH);
  digitalWrite(BUT3, HIGH);

  digitalWrite(RECE, LOW);
  digitalWrite(CALD, LOW);
  digitalWrite(BINE, LOW);
  
 Serial.begin(9600);
 Serial.println("test for niq_ro");

k = 0.86;  // factor corectie citire la multiplexare
delay(100);
t = analogRead(A0);
t0 = t * 110 / 1023;  // pentru referinta interna de 1,1V;
t2 = t0;
}

void loop() {

  Serial.print("meniu = ");
  Serial.println(meniu);

  Serial.print("tset = ");
  Serial.println(tset/10);
  Serial.print("dt = ");
  Serial.println(dt/10);

if (digitalRead(BUT3) == LOW) 
{ meniu = meniu + 1;
delay(250);
}
if (meniu == 3) meniu = 0;

//if (millis() < 2000) citire();
//  t = analogRead(LMPIN);
//  t0 = t *500 / 1023;
leduri();

  Serial.print(t);
  Serial.print("/1023 --> ");
  Serial.print("t = ");
  Serial.println(t0);



//displayNumber(t0*10);
    
if (meniu == 0) {
int numara = 0;
  while (meniu == 0) {
numara = numara + 1;
  if (numara == 1000)
    {
//  float t = analogRead(LMPIN);
//  float t0 = t *500 / 1023;
citire();
t0 = (t0 + t2) /2;
leduri();
 // delay(5);
  numara = 0;
  Serial.print("t = ");
  Serial.println(t0);
//  displayNumber(t0*10); // this is number to diplay
    }
  te(t0*10); // this is number to diplay
  t2 = t0;
if (digitalRead(BUT3) == LOW) 
{ meniu = 1;
delay(250);
}
//Serial.print("t = ");
//Serial.println(t0);
//delay(5);
} 
delay(5);  
}



if (meniu == 1) {
   while (meniu == 1) {
//     minim(tset/10); // this is number to diplay
   teset(tset);
   if (digitalRead(BUT1) == LOW)
  { tset = tset - 1; 
  delay(250);
  }
   if (digitalRead(BUT2) == LOW)
  { tset = tset + 1;
  delay(250);
  }
  if (digitalRead(BUT3) == LOW) 
  { meniu = 2;
  delay(250);
  }
//  delay(15);
     }
     // scriu in memorie temperatura dorita
//tset1 = tset % 256;
//tset1 = tset /= 256;
//  Serial.print("tset1z = ");
//  Serial.println(tset1);
//  Serial.print("tset2u = ");
//  Serial.println(tset2);

tset1 = tset / 256;
tset2 = tset - tset1 * 256;
EEPROM.write(101, tset1);  // partea intreaga
EEPROM.write(102, tset2);   // rest
  Serial.print("tset1z = ");
  Serial.println(tset1);
  Serial.print("tset2u = ");
  Serial.println(tset2);
  
  Serial.print("tset = ");
  Serial.println(tset/10);
   delay (100);
}

if (meniu == 2) {
 // if (tmax <= tmin) tmax = tmin + 10;
   while (meniu ==2) {
 //    maxim(dt/10); // this is number to diplay
     dete(dt); // this is number to diplay
   if (digitalRead(BUT1) == LOW) 
   { dt = dt - 1;
   delay(250);
  }
   if (digitalRead(BUT2) == LOW) 
   { dt = dt + 1;
   delay(250);
  }
   if (digitalRead(BUT3) == LOW) 
   { meniu = 0;
   delay(250);
  }
//   delay(15);
if (dt < 1) dt = 1;
    }
    
  EEPROM.write(103,dt);      
  Serial.print("dt = ");
  Serial.println(dt/10);

    delay(100);
}
}
//Given a number, we display 10:22
//After running through the 4 numbers, the display is left turned off

//Display brightness
//Each digit is on for a certain amount of microseconds
//Then it is off until we have reached a total of 20ms for the function call
//Let's assume each digit is on for 1000us
//Each digit is on for 1ms, there are 4 digits, so the display is off for 16ms.
//That's a ratio of 1ms to 16ms or 6.25% on time (PWM).
//Let's define a variable called brightness that varies from:
//5000 blindingly bright (15.7mA current draw per digit)
//2000 shockingly bright (11.4mA current draw per digit)
//1000 pretty bright (5.9mA)
//500 normal (3mA)
//200 dim but readable (1.4mA)
//50 dim but readable (0.56mA)
//5 dim but readable (0.31mA)
//1 dim but readable in dark (0.28mA)



void dete(int toDisplay) {
#define DISPLAY_BRIGHTNESS  750

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW

  for(int digit = 4 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
      digitalWrite(digit1, DIGIT_ON);
      lightNumber(15); // display degree symbol
      delayMicroseconds(DISPLAY_BRIGHTNESS); 
      break;

    case 2:
      digitalWrite(digit2, DIGIT_ON);
       digitalWrite(13, LOW);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      delayMicroseconds(DISPLAY_BRIGHTNESS); 
      break;
   case 3:
      digitalWrite(digit3, DIGIT_ON);
//      digitalWrite(13, HIGH);
//      digitalWrite(13, LOW);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      delayMicroseconds(DISPLAY_BRIGHTNESS); 
      break;
   case 4:
      digitalWrite(digit4, DIGIT_ON);
      lightNumber(12); // display C letter
      delayMicroseconds(DISPLAY_BRIGHTNESS); 
      break;
    }
     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
}
} 

void te(int toDisplay) {
#define DISPLAY_BRIGHTNESS  500

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW
 for(int digit = 4 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
      digitalWrite(digit1, DIGIT_ON);
      digitalWrite(13, HIGH);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      digitalWrite(13, LOW);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      digitalWrite(13, HIGH);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      lightNumber(12); // display C letter
      digitalWrite(13, HIGH);
      break;
    }
 //   lightNumber(toDisplay % 10);
 //   toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
}
} 


//Given a number, turns on those segments
//If number == 10, then turn off number
void lightNumber(int numberToDisplay) {

#define SEGMENT_ON  LOW
#define SEGMENT_OFF HIGH

  switch (numberToDisplay){

  case 0:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 1:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 2:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 3:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 4:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 5:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 6:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 7:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 8:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 9:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  // all segment are ON
  case 10:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;
  
  // degree symbol made by niq_ro
  case 11:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  // C letter made by niq_ro
  case 12:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;
  
  // c letter made by niq_ro
  case 13:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    digitalWrite(13, SEGMENT_OFF);
    break;

  case 14:  // lower line (d segment)
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;

case 15:  // upper line (a segment)
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    digitalWrite(13, SEGMENT_OFF);
    break;
    
  }
}


void leduri() {
 digitalWrite(CALD, LOW);
 digitalWrite(RECE, LOW);
 digitalWrite(BINE, LOW);

if ( t0*10 < tset ) 
{  digitalWrite(RECE, HIGH);
   digitalWrite(CALD, LOW);
   digitalWrite(BINE, LOW);
}
if ( t0*10 > tset + dt ) 
{  digitalWrite(CALD, HIGH);
   digitalWrite(RECE, LOW);
   digitalWrite(BINE, LOW);
}
if (( t0*10 <= tset+dt ) && ( t0*10 >= tset ))
{  digitalWrite(CALD, LOW);
   digitalWrite(RECE, LOW);
   digitalWrite(BINE, HIGH);
}
}



void teset(int toDisplay) {
#define DISPLAY_BRIGHTNESS  500

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW
 for(int digit = 4 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
      digitalWrite(digit1, DIGIT_ON);
      digitalWrite(13, HIGH);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      digitalWrite(13, LOW);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      digitalWrite(13, HIGH);
      lightNumber(toDisplay % 10);
      toDisplay /= 10;
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      lightNumber(13); // display C letter
      digitalWrite(dP, HIGH);
      break;
    }
 //   lightNumber(toDisplay % 10);
 //   toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);

}
} 

float citire() {
  t = analogRead(A0);
  t0 = t * k *110 / 1023;  // pentru referinta interna de 1,1V;
//  t0 = t *500 / 1023;
  return t0;
}

Am facut si un filmulet in engleza, numit Arduino thermostat

PS: La prima incarcare a sketch-ului trebuie sa scriem niste valori apropiate de cele dorite in memoria interna a microcontrolerului:

apoi se anuleaza cele 3 linii (se "comenteaza") si se reincarca sketch-ul:

Testele au fost facute cu o placa Arduino Uno si vom gasi in sketch

dar functioneaza foarte bine si cu o placa Arduino Mega, trebuind anulata ("comentata") prima linie si activata cea de-a doua:

Daca se doreste conectarea unui releu (la iesirea unde este comectat LED-ul albastru), care sa comande pornirea unei centrale sau a unei rezistente de incalzire, subrutina leduri trebuie schimbata un pic:

void leduri() {
 digitalWrite(CALD, LOW);
 digitalWrite(RECE, LOW);

if ( t0*10 < tset ) 
{  digitalWrite(RECE, HIGH);
   digitalWrite(CALD, LOW);
   pornire = 1;
}
if ( t0*10 > tset + dt ) 
{  digitalWrite(CALD, HIGH);
   digitalWrite(RECE, LOW);
   pornire = 0;
}

if (( t0*10 <= tset+dt ) && ( t0*10 >= tset )) {
if (pornire == 1)
{  digitalWrite(CALD, LOW);
   digitalWrite(RECE, HIGH);
}
if (pornire == 0)
{  digitalWrite(CALD, LOW);
   digitalWrite(RECE, LOW);
}
}
}

si trebuie definita la inceputul sketch-ului variabila int pornire; iar la setup pornire = 0; !!!
Puteti descarca sketch-ul cu modificari de la https://github.com/tehniq3 !
In filmuletul Termostat cu Arduino (3) se vede modul de functionare..