final.cpp

#include "Particle.h"

SYSTEM_MODE(AUTOMATIC);

// chambers on D0-D5
const pin_t CHAMBER_PINS[6] = { D0, D1, D2, D3, D4, D5 };
const char* CHAMBER_NAMES[6] = { "C1", "C2", "C3", "C4", "C5", "C6" };

const pin_t TRIGGER_PIN = D6;
const char* TRIGGER_NAME = "TRIGGER";

// joystick on A0/A1
const pin_t JOYSTICK_X_PIN = A0;
const pin_t JOYSTICK_Y_PIN = A1;

const uint32_t JOYSTICK_REPORT_MS = 50;
uint32_t lastJoystickReport = 0;

const uint32_t EDGE_GUARD_MS = 15; // debounce time

struct Btn {
    pin_t pin;
    const char* name;
    int prevReading;
    bool isPressed;
    uint32_t lastEdgeMs;
};

Btn buttons[6];
Btn triggerBtn;
size_t BTN_COUNT = sizeof(buttons) / sizeof(buttons[0]);

void setup() {
    for (int i = 0; i < 6; i++) {
        buttons[i] = { CHAMBER_PINS[i], CHAMBER_NAMES[i], LOW, false, 0 };
    }
    
    triggerBtn = { TRIGGER_PIN, TRIGGER_NAME, LOW, false, 0 };

    for (size_t i = 0; i < BTN_COUNT; i++) {
        pinMode(buttons[i].pin, INPUT_PULLDOWN);
    }
    
    pinMode(TRIGGER_PIN, INPUT_PULLDOWN);
    pinMode(JOYSTICK_X_PIN, INPUT);
    pinMode(JOYSTICK_Y_PIN, INPUT);

    Serial.begin(115200);
    waitFor(Serial.isConnected, 3000);
}

inline void report(const char* name, bool pressed) {
    if (!Serial.isConnected()) return;
    Serial.printlnf("%s_%s", name, pressed ? "DOWN" : "UP");
}

inline void reportJoystick(int xVal, int yVal) {
    if (!Serial.isConnected()) return;
    Serial.printlnf("JOYSTICK_X:%d,Y:%d", xVal, yVal);
}

void loop() {
    uint32_t now = millis();

    // joystick every 50ms
    if (now - lastJoystickReport >= JOYSTICK_REPORT_MS) {
        int xValue = analogRead(JOYSTICK_X_PIN);
        int yValue = analogRead(JOYSTICK_Y_PIN);
        reportJoystick(xValue, yValue);
        lastJoystickReport = now;
    }

    for (size_t i = 0; i < BTN_COUNT; i++) {
        auto& b = buttons[i];
        int cur = digitalRead(b.pin);
        bool allowEdge = (now - b.lastEdgeMs) >= EDGE_GUARD_MS;

        if (allowEdge && cur == HIGH && b.prevReading == LOW) {
            b.lastEdgeMs = now;
            if (!b.isPressed) {
                b.isPressed = true;
                report(b.name, true);
            }
        }
        if (allowEdge && cur == LOW && b.prevReading == HIGH) {
            b.lastEdgeMs = now;
            if (b.isPressed) {
                b.isPressed = false;
                report(b.name, false);
            }
        }

        b.prevReading = cur;
    }
    
    // trigger button
    {
        auto& b = triggerBtn;
        int cur = digitalRead(b.pin);
        bool allowEdge = (now - b.lastEdgeMs) >= EDGE_GUARD_MS;

        if (allowEdge && cur == HIGH && b.prevReading == LOW) {
            b.lastEdgeMs = now;
            if (!b.isPressed) {
                b.isPressed = true;
                report(b.name, true);
            }
        }
        if (allowEdge && cur == LOW && b.prevReading == HIGH) {
            b.lastEdgeMs = now;
            if (b.isPressed) {
                b.isPressed = false;
                report(b.name, false);
            }
        }

        b.prevReading = cur;
    }
  }