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miercuri, 30 iulie 2014

Afisaj grafic color QVGA de 2,2" cu integrat ILI9341 conectat la Arduino (3)

Termometru dublu cu DS18B20

   Avand in vedere ca senzorii de temperatura LM335Z sunt influentati foarte mult de tensiunea de referinta, m-am gandit sa-i inlocuiesc cu cei digitali DS18B20.
   Nu am vrut sa modific prea mult fata de ce am facut anterior, asa ca am pastrat partea de interfata cu afisajul realizata cu CD4050 alimentat la 3,3v ca si afisajul, iar cei doi senzori DS18B20 i-am conectat in paralel, pinul de comanda si primire date este D10.

   Pentru a nu face interventii mereu, am folosit folosit parti de sketch in care Arduino determina singur adresa senzorilor DS18B20.
   Din pacate nu am reusit sa scad prea mult marimea sketch-ului si nu pot face compilarea decat pe Arduino Mega (voiam sa trec pe Arduino Uno...).
   Sketch-ul folosit de mine este:
/*
original sketch by niq_ro from http://nicuflorica.blogspot.com using ucglib library
version for 2.2" TFT with ILI9341  - 2014.07.29, Craiova - Romania
use Universal uC Color Graphics Library from https://code.google.com/p/ucglib/
*/
#include <SPI.h>
#include "Ucglib.h"
//Ucglib_ILI9341_18x240x320_HWSPI ucg(/*cd=*/ 6 , /*cs=*/ 5, /*reset=*/ 4); // at Uno
Ucglib_ILI9341_18x240x320_HWSPI ucg(/*cd=*/ 26 , /*cs=*/ 24, /*reset=*/ 22); // at Mega
/*
Mega | Uno | TFT - ILI9341
----------------------
D22  | D4  | RESET
D24  | D5  | CS
D26  | D6  | D/C
 ?   | ?   | LED (via 220 ohms resistor at 5V)
D51  | D11 | MOSI
D50  | D12 | MISO
D52  | D13 | SCK
-----------------------------
with CD4050 adapter or 10k resistor, power supply and logical levels is 3.3V
schematic: http://nicuflorica.blogspot.ro/2014/07/afisaj-grafic-color-qvga-de-22-cu.html
*/

#include <OneWire.h>
OneWire  ds(10);  // on pin 10 (a 4.7K resistor is necessary)  
int ics =0; //count number of sensor

int t1, t2;
float t10, t20;
float t11, t21;
float t12, t22;
float t13, t23;

void setup(void) {
delay(1000);
ucg.begin(UCG_FONT_MODE_TRANSPARENT);
ucg.clearScreen();
ucg.setFont(ucg_font_ncenR14r);
ucg.setColor(255, 0, 255);
ucg.setColor(1, 255, 0,0);

  ucg.setRotate90();
  ucg.setColor(255, 255, 255); // culoare alba
  ucg.drawFrame(0,0,320,240); // 
  ucg.setFont(ucg_font_courB24); // 20 pixel height
  ucg.setColor(255, 0, 0); // culoare rosie
  ucg.setPrintPos(60,30);
  ucg.print("Termometru");
  ucg.setColor(0, 255, 0); // culoare verde
  ucg.setColor(0, 255, 0);
  ucg.setColor(0, 0, 255); // culoare albastru
  ucg.setPrintPos(20, 60);
  ucg.print("dublu cu 18B20");
  ucg.setFont(ucg_font_fur17r); // 17 pixel height
  ucg.setColor(255, 255, 0); // culoare galbena
  ucg.setPrintPos(25,90);
  ucg.print("ecran grafic 2,2'' (5,6cm)");
  ucg.setFont(ucg_font_courB24); // 20 pixel height 
  ucg.setColor(0, 255, 255); // culoare bleo
  ucg.setPrintPos(10,120);
  ucg.print("QVGA cu ILI9341");
  ucg.setColor(255, 0, 255); // culoare mov
  ucg.setPrintPos(40,150);
  ucg.print("versiune 2.0");
  ucg.setFont(ucg_font_fur17r); // 17 pixel height
  ucg.setColor(255, 255, 255); // culoare alb
  ucg.setPrintPos(60,200);
  ucg.print("realizat de niq_ro");

delay(5000);
ucg.clearScreen();
t13=40.0;
t23=40.0;
}

void loop(void) {
byte i;
byte present = 0;
byte type_s;
byte data[12];
byte addr[8];
float celsius;
if ( !ds.search(addr)) {
    ds.reset_search();
    ics=0;
    return;
  }

ics++; 
ds.reset();
ds.select(addr);
ds.write(0x44, 1);        // start conversion, with parasite power on at the end
delay(1000);     // maybe 750ms is enough, maybe not
  present = ds.reset();
  ds.select(addr);    
  ds.write(0xBE);         // Read Scratchpad
  for ( i = 0; i < 9; i++) {           // we need 9 bytes
  data[i] = ds.read();
  }
  // Convert the data to actual temperature
  int16_t raw = (data[1] << 8) | data[0];
  if (type_s) {
    raw = raw << 3; // 9 bit resolution default
    if (data[7] == 0x10) {
      // "count remain" gives full 12 bit resolution
      raw = (raw & 0xFFF0) + 12 - data[6];
    }
  } else {
    byte cfg = (data[4] & 0x60);
    if (cfg == 0x00) raw = raw & ~7;  // 9 bit resolution, 93.75 ms
    else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
    else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
    //// default is 12 bit resolution, 750 ms conversion time
  }
celsius = (float)raw / 16.0;
if (ics == 1) 
{
//  Serial.println("t1=");
  t12 = celsius;
}
else
if (ics == 2)
{
//  Serial.println("t1=");
t22 = celsius;
}
int t15 = t12;
float t16 = 10*t15;
t16 = t16/10;
int t25 = 10*t22;
float t26 = t25;
t26 = t26/10;
if (t16 != t13) 
{
temperaturi(t16, t13, 20, 0); 
termometre(t16, 20);
}
if (t26 != t23) 
{
temperaturi(t26, t23, 85, 160);
termometre(t26,250); 
}
delay (2000); 
t13=t16;
t23=t26;
} // final de program, se revine de la inceput

void temperaturi(float t3, float t4, int ics, int igrec)
{
int t5 = t3;
int t6 = t4;
ucg.setFont(ucg_font_courB24);    
if (t3*t4 < 0)
{ucg.setColor(0, 0, 0); 
for (int qy = 39 ; qy < 60; qy++) 
{
 ucg.drawHLine(ics+7, qy + igrec , 105);
}
}
int t51 = t5/10;
int t61 = t6/10;
ucg.setColor(0, 0, 0); 
if (t51 != t61)
{
for (int qy = 39 ; qy < 60; qy++) 
{
ucg.drawHLine(ics+28, qy + igrec , 21);
}
}
t5 = t3 - t51*10;
t6 = t4 - t61*10;
if (t5 != t6)
{
for (int qy = 39 ; qy < 60; qy++) 
{
ucg.drawHLine(ics+49, qy + igrec , 21);
}
} 
for (int qy = 39 ; qy < 60; qy++) 
{
 ucg.drawHLine(ics+91, qy + igrec , 21);
}
if (igrec <30) ucg.setColor(255, 0, 0);  
else ucg.setColor(0, 0, 255);  
ucg.setPrintPos(10 + ics, 30 + igrec);
ucg.print("t  :"); 
ucg.setPrintPos(10 + ics, 60 + igrec);
if (t3 > 10.0) ucg.print("+");
else
 if (t3>0.0) ucg.print(" +");
else
 if (t3<0.0)
{
 t3=-t3;
 if (t3 > 10.0) ucg.print("-");
else
 if (t3 > 0.0) ucg.print(" -");
}  
if (t3==0.0) ucg.print("  ");
ucg.print(t3,1); 
ucg.print(" C"); 
ucg.setFont(ucg_font_fur17r); 
ucg.setPrintPos(30 + ics, 35 + igrec);
if (igrec == 0) ucg.print("int"); 
else ucg.print("ext"); 
ucg.setPrintPos(115 + ics, 50 + igrec);
ucg.print("o"); 
}

void termometre (float t, int ics1)
{
ucg.setColor(255, 255, 255);  
ucg.drawFrame(ics1-4,10,9,200); 
ucg.drawCircle(ics1,220,10,UCG_DRAW_ALL);  
for (int a = 0; a < 10; a++)
{
ucg.drawLine(ics1-5,20+20*a,ics1-7,20+20*a);
ucg.drawLine(ics1+5,20+20*a,ics1+7,20+20*a);
}
ucg.drawLine(ics1-10,140,ics1+10,140);  
ucg.setFont(ucg_font_courB24);    
ucg.setPrintPos(13 + ics1, 149);
ucg.print("0 C"); 
ucg.setFont(ucg_font_fur17r); 
ucg.setPrintPos(37 + ics1, 135);
ucg.print("o"); 
int lin = 140 - 2*t;
ucg.setColor(0, 0, 0);  // black 
ucg.drawBox(ics1-2,21, 5, lin+5);
if (ics1 <30) ucg.setColor(255, 0, 0);  
else ucg.setColor(0, 0, 255);  
ucg.drawDisc(ics1,220,8,UCG_DRAW_ALL);  
ucg.drawBox(ics1-2,lin, 5, 210-lin);
}
   Am facut si un filmulet care se numeste termometru dublu cu DS18B20 si afisaj grafic de 2.2" cu ILI9341 si am prezentat in mare ce am folosit si ce afiseaza:

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