adds timer to control nfc check duration

main/context.cpp

@@ -1 +1,6 @@
 #include "Context.h"
+
+Context::Context(Station* stations, unsigned long delta) {
+  this->stations = stations;
+  this->delta = delta;
+}

main/context.h

@@ -4,5 +4,8 @@
 
 class Context {
 public:
-    Station* stations[4];
+  Context(Station* stations, unsigned long delta);
+  
+  Station* stations;
+  unsigned long delta;
 };

main/main.ino

@@ -6,6 +6,7 @@
 #include "statemachine.h"
 #include "state.h"
 #include "states.h"
+#include "timer.h"
 
 #define PN532_CS 10
 
@@ -15,21 +16,36 @@ const int rs = 9, en = 8, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
 LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
 
 Station stations[4] = { Station(1680767519, "Yellow"), Station(3346823711, "Green"), Station(3569318175, "Pink"), Station(2174777887, "Blue") };
+Timer stationDetectionTimer(1000, true);
 
 StateMachine stateMachine(new Startup());
 
+unsigned long lastLoopTime = 0;
+unsigned long currentLoopTime = 0;
+unsigned long deltaTime = 0;
+
 void setup(void) {
   setupNFC();
 
   lcd.begin(16, 2);
   lcd.setCursor(0, 0);
   lcd.print("Test");
+  stationDetectionTimer.start();
 }
 
 void loop(void) {
+  currentLoopTime = millis();
+  deltaTime = currentLoopTime - lastLoopTime;
+
+  bool doCheck = stationDetectionTimer.update(deltaTime);
+  if (doCheck) {
     lcd.clear();
     checkStations();
-  delay(1000);
+  }
+
+  stateMachine.update(Context(stations, deltaTime));
+
+  lastLoopTime = currentLoopTime;
 }
 
 void setupNFC() {

main/states.cpp

@@ -58,5 +58,5 @@ NewTargetFinder::NewTargetFinder(Station* currentStation) {
 }
 
 State* NewTargetFinder::update(Context context) {
-  return new WaitingForPickup(this->currentStation, context.stations[0]);
+  return new WaitingForPickup(this->currentStation, (&context.stations)[0]);
 }

main/timer.cpp

@@ -0,0 +1,33 @@
+#include "timer.h"
+
+Timer::Timer(unsigned long duration, bool autoRestart) {
+  this->autoRestart = autoRestart;
+  this->duration = duration;
+  this->endTime = duration;
+}
+
+void Timer::start() {
+  this->running = true;
+}
+
+bool Timer::update(unsigned long delta) {
+  if (!running) {
+    return false;
+  }
+  bool timedOut = false;
+  this->currentTime += delta;
+  if (currentTime > this->endTime) {
+    timedOut = true;
+  }
+  if (timedOut && this->autoRestart) {
+    this->endTime += this->duration;
+  }
+  if (timedOut && !this->autoRestart) {
+    running = false;
+  }
+  return timedOut;
+}
+
+bool Timer::isRunning() {
+  return this->running;
+}

main/timer.h

@@ -0,0 +1,18 @@
+#pragma once
+#include <Arduino.h>
+
+class Timer {
+private:
+  unsigned long duration;
+  bool autoRestart;
+
+  unsigned long currentTime;
+  unsigned long endTime;
+  bool running;
+
+public:
+  Timer(unsigned long duration, bool autoRestart);
+  void start();
+  bool update(unsigned long delta);
+  bool isRunning();
+};