**Button Control** rev_01

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    - Project: **Button Control**
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2024-12-16 02:12:46

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* set pins d5,d18,d19,d23 to high.  set pins D13, */
    /* D12, D14, D27 as mux pins s0, s1 ,s2 ,s3.  add a */
    /* button to pin D26, when the input goes low, */
    /* increment the number to the mux. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <EasyButton.h>

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

// Pin definitions
const int muxPins[] = {D13, D12, D14, D27}; // MUX pins
const int buttonPin = D26; // Button pin
EasyButton button(buttonPin); // Create button object

// MUX value
int muxValue = 0;

void setup(void)
{
    // Set pins D5, D18, D19, D23 to HIGH
    pinMode(D5, OUTPUT);
    pinMode(D18, OUTPUT);
    pinMode(D19, OUTPUT);
    pinMode(D23, OUTPUT);

    digitalWrite(D5, HIGH);
    digitalWrite(D18, HIGH);
    digitalWrite(D19, HIGH);
    digitalWrite(D23, HIGH);

    // Set MUX pins as OUTPUT
    for (int i = 0; i < 4; i++) {
        pinMode(muxPins[i], OUTPUT);
    }

    // Initialize button
    button.begin();
}

void loop(void)
{
    // Update button state
    button.update();

    // Check if the button is pressed
    if (button.isPressed()) {
        // Increment the mux value
        muxValue = (muxValue + 1) % 16; // Assuming a 4-bit MUX (0-15)

        // Set MUX pins according to the muxValue
        for (int i = 0; i < 4; i++) {
            digitalWrite(muxPins[i], (muxValue >> i) & 0x01);
        }
    }

    // Add a small delay to debounce the button
    delay(50);
}

/* END CODE */