How to make back button from function to main menu

jiikoomusic · December 9, 2021, 12:29pm

So, how to make "Back to menu"-button in those "Measure Celsius"- and "Measure Fahrenheit"-functions? We have McuFriend 2.8" touch screen in this project and we can´t make a function what turns back to main menu from "Measure Celsius"- or "Measure Fahrenheit"-"app"...

Here is the code.

#include <Adafruit_GFX.h>    // Core graphics library
#include <MCUFRIEND_kbv.h>   // Hardware-specific library
MCUFRIEND_kbv tft;
#include <TouchScreen.h>
#include <Fonts/Org_01.h>
#include <FreeDefaultFonts.h>

const int XP=7, XM=A1, YP=A2, YM=6; //240x320 ID=0x6809
const int TS_LEFT=91, TS_RT=904, TS_TOP=122, TS_BOT=922; //näytön kalibrointi

TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300); //(data,data,data,data,sensitivity);

#define MINPRESSURE 200
#define MAXPRESSURE 1000

int currentpage;


#define BLACK       0x0000      // Värit      
#define BLUE        0x001F      
#define GREEN       0x07E0           
#define RED         0xF800           
#define YELLOW      0xFFE0      
#define WHITE       0xFFFF      

#include "RTClib.h"   // Ensin määritetään komponentit
RTC_PCF8523 rtc; 

#include <Adafruit_MLX90614.h>    // MLX90614-sensorin määritys alkaa
Adafruit_MLX90614 mlx = Adafruit_MLX90614();
void setup()
{
  Serial.begin(9600);
  while (!Serial);
  if (!mlx.begin())
  {
    Serial.println("Yhdistys MLX sensoriin ei onnistunut. Tarkista kytkentä savun halvettya.");
    while (1);
  } 
  Serial.println("================================================");   // MLX90614-sensorin määritys loppuu
  
  if (! rtc.begin())    // RTC-kellon määritys alkaa
  {
    Serial.println("RTC-kello hukassa, tarkista kytkentä!");
    Serial.flush();
    while (1) delay(10);
  }
                  
  if (! rtc.initialized() || rtc.lostPower()) 
  {
    Serial.println("RTC ei ole asennettu, asetetaan seuraavaksi aika ja päivämäärä!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));   // Päivämäärän ja kellonajan määritys, jos RTC:stä on katkennut virta, tai patteri on irrotettu (muisti hävinnyt)
                                                      // Päivämäärä ja kellonaika asetetaan muodossa (2021,12,22, 14,53,32)
  }
  
  rtc.start();  // Tähän asti päästyä RTC on asentunut ja toimii oikein, joten voidaan aloittaa varsinainen ohjelma
                  
  float drift = 43; // Kalibroi sekunnit 
  float period_sec = (7 * 86400);  // (86400 = sekunnit per päivä 1:  7 päivää = (7 * 86400) sekuntia )
  float deviation_ppm = (drift / period_sec * 1000000); //  Sekunnin poikkeama miljoonasosina
  float drift_unit = 4.34; // OFFSET-toiminto PCF8523_TwoHours-käytössä
  int offset = round(deviation_ppm / drift_unit);
  
  Serial.print("Offset is "); Serial.println(offset); // Offsetin arvo
  
  // RTC-kellon määritys loppuu
  tft.reset();
  uint16_t ID = tft.readID();
  Serial.print("TFT nayton prosessori = 0x");
  Serial.println(ID, HEX);
  tft.begin(ID);
  tft.setRotation(1); //näytön suunnan määritys, 0 = 0 astetta, 1 = 90 astetta 2 = 180 astetta, 3 = 270 astetta
  
  currentpage = 0;
  
  tft.fillScreen(BLACK); //määritetään minkä värinen näytön tausta on
  drawHome();  
}

void loop()
{
  TSPoint p = ts.getPoint();     // Read touchscreen
  digitalWrite(13, HIGH);
  digitalWrite(13, LOW);

  pinMode(XM, OUTPUT);
  pinMode(YP, OUTPUT);

  //DateTime now = rtc.now();
  
  if (currentpage == 0)
  {
    if (p.z > 10 && p.z < 1000)
    {
      if (p.x > 303 && p.x < 425 && p.y > 180 && p.y < 750) //jos klikataan Measure celsius
      {
        Serial.println("Measure celsius");

        currentpage = 1;

        tft.fillRoundRect(30, 45, 240, 40, 8, WHITE);
        delay(100);

        tft.fillRoundRect(30, 45, 240, 40, 8, RED);
        tft.drawRoundRect(30, 45, 240, 40, 8, WHITE); //Measure celsius
        
        tft.setCursor(38, 57);
        tft.println("Measure celsius");
        delay(100);

        startCelsius();
      }
      if (p.x > 440 && p.x < 563 && p.y > 180 && p.y < 800) //jos klikataan Measure fahrenheit
      {
        Serial.println("Measure fahrenheit");

        currentpage = 2;
        tft.fillRoundRect(30, 95, 240, 40, 8, WHITE);
        delay(100);

        tft.fillRoundRect(30, 95, 240, 40, 8, RED);
        tft.drawRoundRect(30, 95, 240, 40, 8, WHITE); //Measure fahrenheit
        
        tft.setCursor(38, 107);
        tft.print("Measure fahrenheit");
        delay(100);

        startFahrenheit();
      }
      if (p.x > 603 && p.x < 703 && p.y > 180 && p.y < 750) //jos klikataan Calendar
      {
        Serial.println("Calendar");

        currentpage = 3;
        tft.fillRoundRect(30, 145, 240, 40, 8, WHITE);
        delay(100);

        tft.fillRoundRect(30, 145, 240, 40, 8, RED);   
        tft.drawRoundRect(30, 145, 240, 40, 8, WHITE); //Calendar
        
        tft.setCursor(38, 157);
        tft.print("Calendar");
        delay(100);

        startCalendar();
      }
    
  }
  }
  if (currentpage == 1) //celsius
  { 
   
    if (p.z > MINPRESSURE && p.z < MAXPRESSURE)
    if (p.x > 743 && p.x < 850 && p.y> 105 && p.y < 200) //Takaisin nuolen klikkauskohta
      {
        backMenu();
        drawHome();
      }
  }
  if (currentpage == 2) //fahrenheit
  {  
    if (p.z > MINPRESSURE && p.z < MAXPRESSURE)
    if (p.x > 743 && p.x < 850 && p.y> 105 && p.y < 200) //Takaisin nuolen klikkauskohta
      {
        backMenu();
        drawHome();
      }
  }
  if (currentpage == 3) //calendar
    if (p.z > MINPRESSURE && p.z < MAXPRESSURE)
    if (p.x > 743 && p.x < 850 && p.y> 105 && p.y < 200) //Takaisin nuolen klikkauskohta
      {
        backMenu();
        drawHome();
      }
}

void drawHome()
{

  tft.fillScreen(BLACK);
  tft.drawRoundRect(3, 0, 315, 240, 8, WHITE);     //Page border

  tft.fillRoundRect(30, 45, 240, 40, 8, RED);
  tft.drawRoundRect(30, 45, 240, 40, 8, WHITE); //Measure celsius
  
  tft.fillRoundRect(30, 95, 240, 40, 8, RED);
  tft.drawRoundRect(30, 95, 240, 40, 8, WHITE); //Measure fahrenheit

  tft.fillRoundRect(30, 145, 240, 40, 8, RED);   
  tft.drawRoundRect(30, 145, 240, 40, 8, WHITE); //Calendar

  tft.setCursor(32, 20);
  tft.setTextSize(2);
  tft.setTextColor(WHITE);
  tft.print("MENU");

  tft.setCursor(200, 20);
  tft.setTextSize(1);
  tft.setTextColor(WHITE);
  tft.print("Pvm");

  tft.setCursor(200, 30);
  tft.setTextSize(1);
  tft.setTextColor(WHITE);
  tft.print("Klo");
  
  tft.setTextColor(BLACK);
  tft.setCursor(38, 57);
  tft.setTextSize(2);
  tft.print("Measure celsius");

  tft.setTextColor(BLACK);
  tft.setCursor(38, 107);
  tft.setTextSize(2);
  tft.print("Measure fahrenheit");
  
  tft.setTextColor(BLACK);
  tft.setCursor(38, 157);
  tft.setTextSize(2);
  tft.print("Calendar");
}
void startCelsius()
{
  tft.fillScreen(BLACK);
  tft.setCursor(32, 20);
  tft.setTextSize(2);
  tft.setTextColor(WHITE);
  tft.print("Temperature in C");

  tft.fillRect(30, 60, 240, 70, RED);
  tft.drawRect(30, 60, 240, 70, WHITE);
  
  tft.setCursor(38, 72);
  tft.setTextColor(BLACK);
  tft.print("Environment:");
    
  tft.setCursor(185, 72);
  tft.setTextColor(BLACK, RED);
  tft.print(mlx.readAmbientTempC());
  
  
  tft.setCursor(250, 72);
  tft.setTextColor(BLACK);
  tft.print("C");
  
  tft.setCursor(38, 92);
  tft.setTextColor(BLACK);
  tft.print("Target:");
  
  tft.setCursor(125, 92);
  tft.setTextColor(BLACK, RED);
  tft.print(mlx.readObjectTempC());
  
  tft.setCursor(190, 92);
  tft.setTextColor(BLACK);
  tft.print("C");

  backMenuIcon();
  while(mlx.readAmbientTempC(), mlx.readObjectTempC())
  {
    
  tft.setCursor(185, 72);
  tft.setTextColor(BLACK, RED);
  tft.print(mlx.readAmbientTempC());
  tft.setCursor(125, 92);
  tft.setTextColor(BLACK, RED);
  tft.setCursor(125, 92);
  tft.setTextColor(BLACK, RED);
  tft.print(mlx.readObjectTempC());
  if(mlx.readObjectTempC() > -20){
      tone(24, 200, 300);
      } 
    if(mlx.readObjectTempC() > -10){
      tone(24, 200, 300);
      } 
    if(mlx.readObjectTempC() > 0){
      tone(24, 200, 300);
      } 
    if(mlx.readObjectTempC() > 10){
      tone(24, 230, 300);
      }
    if(mlx.readObjectTempC() > 25){
      tone(24, 262, 300);
      }
    if(mlx.readObjectTempC() > 26){
      tone(24, 294, 300);
      }
    if(mlx.readObjectTempC() > 27){
      tone(24, 330, 300);
      }
    if(mlx.readObjectTempC() > 28){
      tone(24, 349, 300);
      }
    if(mlx.readObjectTempC() > 29){
      tone(24, 379, 300);
      }
    if(mlx.readObjectTempC() > 30){
      tone(24, 409, 300);
      }
    if(mlx.readObjectTempC() > 40){
      tone(24, 502, 300);
      }
    if(mlx.readObjectTempC() > 70){
      tone(24, 200, 300);
      
      }
  }
}

void startFahrenheit()
{
  tft.fillScreen(BLACK);
  tft.setCursor(32, 20);
  tft.setTextSize(2);
  tft.setTextColor(WHITE);
  tft.print("Temperature in F");
  
  tft.fillRect(30, 60, 240, 70, RED);
  tft.drawRect(30, 60, 240, 70, WHITE);
  
  tft.setCursor(38, 72);
  tft.setTextColor(BLACK);
  tft.print("Environment:");
  
  tft.setCursor(185, 72);
  tft.setTextColor(BLACK);
  tft.print(mlx.readAmbientTempF());
  
  tft.setCursor(255, 72);
  tft.setTextColor(BLACK);
  tft.print("F");
  
  tft.setCursor(38, 92);
  tft.setTextColor(BLACK);
  tft.print("Target:");
  
  tft.setCursor(125, 92);
  tft.setTextColor(BLACK);
  tft.print(mlx.readObjectTempF());
  
  tft.setCursor(200, 92);
  tft.setTextColor(BLACK);
  tft.print("F");
  
    if(mlx.readObjectTempF() > -20){
      tone(24, 200, 300);
      } 
    if(mlx.readObjectTempF() > -10){
      tone(24, 200, 300);
      } 
    if(mlx.readObjectTempF() > 0){
      tone(24, 200, 300);
      } 
    if(mlx.readObjectTempF() > 10){
      tone(24, 230, 300);
      }
    if(mlx.readObjectTempF() > 25){
      tone(24, 262, 300);
      }
    if(mlx.readObjectTempF() > 26){
      tone(24, 294, 300);
      }
    if(mlx.readObjectTempF() > 27){
      tone(24, 330, 300);
      }
    if(mlx.readObjectTempF() > 28){
      tone(24, 349, 300);
      }
    if(mlx.readObjectTempF() > 60){
      tone(24, 392, 300);
      }
    if(mlx.readObjectTempF() > 70){
      tone(24, 200, 300);
      }
  
  backMenuIcon();
}

void startCalendar()
{
  tft.fillScreen(BLACK);
  tft.setCursor(32, 20);
  tft.setTextSize(2);
  tft.setTextColor(WHITE);
  tft.print("Calendar");
  
  backMenuIcon();
}

void backMenu() //Takaisin napin toiminto
{
  tft.fillRoundRect(5, 195, 50, 30, 8, WHITE);
  delay(70);
  tft.fillRoundRect(5, 195, 50, 30, 8, BLUE);
  tft.drawRoundRect(5, 195, 50, 30, 8, WHITE);
  tft.setCursor(15, 204);
  tft.print("<-");
  delay(70);
  tft.fillRoundRect(5, 195, 50, 30, 8, BLACK);
  currentpage = 0;
}

void backMenuIcon() //Takaisin napin kuva
{
  tft.fillRoundRect(5, 195, 50, 30, 8, BLUE);
  tft.drawRoundRect(5, 195, 50, 30, 8, WHITE);
  tft.setCursor(15, 204);
  tft.setTextColor(BLACK);
  tft.print("<-");
}

UKHeliBob · December 9, 2021, 12:30pm

Your post was MOVED to its current location as it is more suitable.

johnwasser · December 9, 2021, 4:13pm

If someone clicks on 'backMenuIcon', set currentpage to 0 and return from the function.

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