"Button Navigation" rev_12

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    - Project: "Button Navigation"
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2024-06-07 10:38:30

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* lcd display i2c  20x4  button pin11 UP LOW menu up */
    /* button pin10 UP LOW menu enter  button pin12UP LOW */
    /* menu down  MaxTemp ->max_temp -= 1.0; */
    /* MinTeamp->min_temp -= 1.0;  MaxFlow ->max_flow -= */
    /* 1.0;  MinFlow ->min_flow -= 1.0; */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <LiquidCrystal_I2C.h>  //https://github.com/marcoschwartz/LiquidCrystal_I2C

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t UP_BUTTON_PushButton_PIN_D11 = 11;
const uint8_t DOWN_BUTTON_PushButton_PIN_D12 = 12;
const uint8_t ENTER_BUTTON_PushButton_PIN_D10 = 10;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
LiquidCrystal_I2C lcd(0x27, 20, 4);  // set the LCD address to 0x27 for a 20 chars and 4 line display

/****** GLOBAL VARIABLES *****/
float max_temp = 100.0;
float min_temp = 0.0;
float max_flow = 100.0;
float min_flow = 0.0;
int menu_index = 0;

void setup(void)
{
    // put your setup code here, to run once:

    pinMode(UP_BUTTON_PushButton_PIN_D11, INPUT_PULLUP);
    pinMode(DOWN_BUTTON_PushButton_PIN_D12, INPUT_PULLUP);
    pinMode(ENTER_BUTTON_PushButton_PIN_D10, INPUT_PULLUP);

    // Initialize the LCD
    lcd.init();
    lcd.backlight();

    // Display a welcome message
    lcd.setCursor(3, 0);
    lcd.print("Hello, world!");
    lcd.setCursor(2, 1);
    lcd.print("Ywrobot Arduino!");
    lcd.setCursor(0, 2);
    lcd.print("Arduino LCM IIC 2004");
    lcd.setCursor(2, 3);
    lcd.print("Power By Ec-yuan!");
    delay(2000);  // Display the welcome message for 2 seconds
    lcd.clear();
}

void loop(void)
{
    // put your main code here, to run repeatedly:

    if (digitalRead(UP_BUTTON_PushButton_PIN_D11) == LOW) {
        menu_index--;
        if (menu_index < 0) menu_index = 3;
        delay(200);  // Debounce delay
    }

    if (digitalRead(DOWN_BUTTON_PushButton_PIN_D12) == LOW) {
        menu_index++;
        if (menu_index > 3) menu_index = 0;
        delay(200);  // Debounce delay
    }

    if (digitalRead(ENTER_BUTTON_PushButton_PIN_D10) == LOW) {
        switch (menu_index) {
            case 0:
                max_temp -= 1.0;
                break;
            case 1:
                min_temp -= 1.0;
                break;
            case 2:
                max_flow -= 1.0;
                break;
            case 3:
                min_flow -= 1.0;
                break;
        }
        delay(200);  // Debounce delay
    }

    // Display the current menu and values
    lcd.clear();
    switch (menu_index) {
        case 0:
            lcd.setCursor(0, 0);
            lcd.print("MaxTemp: ");
            lcd.print(max_temp);
            break;
        case 1:
            lcd.setCursor(0, 0);
            lcd.print("MinTemp: ");
            lcd.print(min_temp);
            break;
        case 2:
            lcd.setCursor(0, 0);
            lcd.print("MaxFlow: ");
            lcd.print(max_flow);
            break;
        case 3:
            lcd.setCursor(0, 0);
            lcd.print("MinFlow: ");
            lcd.print(min_flow);
            break;
    }
    delay(100);  // Small delay to avoid flickering
}

/* END CODE */