Fixed #2 Persist counters

Added initialisation sketch and reset state

Globals.cpp

@@ -2,6 +2,7 @@
 #include "Globals.h"
 #include "StateHandler.h"
 #include "LowPower.h"
+#include "EEPROM.h"
 
 
 SegmentDisplay* display;
@@ -15,6 +16,13 @@ uint32_t hits = 0;
 unsigned long currentTime;
 AbstractStateHandler* currentState;
 
+byte shotCounterOffset;
+byte hitCounterOffset;
+
+
+#define counterTreshold (uint32_t)10000
+uint32_t lastShotCounterIteration;
+uint32_t lastHitCounterIteration;
 
 void setCurrentState(AbstractStateHandler* value)
 {
@@ -36,7 +44,7 @@ void update()
 
   // Count the shot no matter which state we're in
   if (buttonArmed->changed() && !buttonArmed->pressed())
-    shots++;
+    addShot();
 }
 
 
@@ -72,4 +80,89 @@ void sleep()
     buttonB->update(currentTime);
     buttonB->block();
   }
+}
+
+
+#define counterLocation(offset) 2 + (offset * sizeof(uint32_t))
+
+void readCounters()
+{
+  shotCounterOffset = EEPROM.read(0);
+  hitCounterOffset = EEPROM.read(1);
+
+  EEPROM.get(counterLocation(shotCounterOffset), shots);
+  EEPROM.get(counterLocation(hitCounterOffset), hits);
+
+  lastShotCounterIteration = shots / counterTreshold;
+  lastHitCounterIteration = hits / counterTreshold;
+}
+
+
+void setShots(uint32_t value)
+{
+  shots = value;
+
+  uint32_t newShotCounterIteration = shots / counterTreshold;
+  if (newShotCounterIteration != lastShotCounterIteration || value == 0)
+  {
+    shotCounterOffset++;
+    if (counterLocation(shotCounterOffset) > EEPROM.length() - sizeof(uint32_t))
+    {
+      shotCounterOffset = 0;
+      if (shotCounterOffset == hitCounterOffset)
+        shotCounterOffset++;
+    }
+
+    EEPROM.write(0, shotCounterOffset);
+    lastShotCounterIteration = newShotCounterIteration;
+  }
+
+  EEPROM.write(counterLocation(shotCounterOffset), shots);
+}
+
+
+void addShot()
+{
+  setShots(shots + 1);
+}
+
+
+void setHits(uint32_t value)
+{
+  hits = value;
+
+  uint32_t newHitCounterIteration = hits / counterTreshold;
+  if (newHitCounterIteration != lastHitCounterIteration || value == 0)
+  {
+    hitCounterOffset++;
+    if (counterLocation(hitCounterOffset) > EEPROM.length() - sizeof(uint32_t))
+    {
+      hitCounterOffset = 0;
+      if (hitCounterOffset == shotCounterOffset)
+        hitCounterOffset++;
+    }
+
+    EEPROM.write(1, hitCounterOffset);
+    lastHitCounterIteration = newHitCounterIteration;
+  }
+
+  EEPROM.write(counterLocation(hitCounterOffset), hits);
+}
+
+
+void addHit()
+{
+  setHits(hits + 1);
+}
+
+
+void resetShots()
+{
+  setShots(0);
+}
+
+
+void resetHits()
+{
+  setHits(0);
 }

Globals.h

@@ -21,4 +21,10 @@ void setCurrentState(AbstractStateHandler* value);
 void update();
 void sleep();
 
+void readCounters();
+void addShot();
+void addHit();
+void resetShots();
+void resetHits();
+
 #endif

NerfStatTrak.ino

@@ -20,6 +20,7 @@ void setup()
   display->setLatchPin(NerfLatchPin);
   display->setDigits(NerfDigits);
   display->begin();
+  display->clear();
 
 
   // Configure buttons
@@ -33,6 +34,7 @@ void setup()
   buttonArmed->init(NerfButtonArmed, LOW);
 
 
+  readCounters();
   setCurrentState(new DefaultState());
 }
 

NerfStatTrakConfig.h

@@ -46,4 +46,11 @@
 #define NerfDefaultSleepTime 10000
 
 
+/**
+ * Reset state configuration
+**/
+#define NerfResetIntroTime 1000
+#define NerfResetOutroTime 2000
+
+
 #endif

StateDefault.cpp

@@ -3,6 +3,7 @@
 #include "Globals.h"
 #include "StateLoseTheGame.h"
 #include "StateUserUnknown.h"
+#include "StateReset.h"
 
 
 bool DefaultState::ShowHits = true;
@@ -24,10 +25,10 @@ void DefaultState::loop()
     return;
   }
 
-  if (buttonA->changed() && !buttonA->pressed())
+  // A short (triggered on release)
+  if (buttonA->changed() && !buttonA->pressed() && buttonA->pressedMillis(currentTime) <= NerfButtonLongPressThreshold)
   {
-    // A (triggered on release)
-    hits++;
+    addHit();
 
     if (!DefaultState::ShowHits)
       setShowHits(true);
@@ -35,6 +36,12 @@ void DefaultState::loop()
     lastAction = currentTime;
   }
 
+  // A long
+  if (buttonA->pressed() && buttonA->pressedMillis(currentTime) > NerfButtonLongPressThreshold)
+  {
+    setCurrentState(new ResetState());
+  }
+
   // B short (triggered on release)
   if (buttonB->changed() && !buttonB->pressed() && buttonB->pressedMillis(currentTime) <= NerfButtonLongPressThreshold)
   {

StateDefault.h

@@ -10,7 +10,8 @@
  * Start by showing the current counter mode (hits or shots),
  * then display the value.
  *
- * A:         Add hit
+ * A short:   Add hit
+ * A long:    Go to reset state
  * B short:   Toggle between hits and shots and restart state
  * A + B:     Display "Error user unknwn"
  * B long:    Display "You lost the game" animation (losethegame.com - you're welcome!)

StateReset.cpp

@@ -0,0 +1,114 @@
+#include "StateReset.h"
+#include "Globals.h"
+#include "NerfStatTrakConfig.h"
+#include "StateDefault.h"
+
+
+void ResetState::setup()
+{
+  intro = true;
+  introStart = currentTime;
+
+  outro = false;
+  selected = 0;
+}
+
+
+void ResetState::loop()
+{
+  if (intro)
+  {
+    if (currentTime - introStart >= NerfResetIntroTime)
+      intro = false;
+
+    char text[] = "Reset";
+    display->writeTextLeft(text);
+    return;
+  }
+
+  if (outro)
+  {
+    loopOutro();
+    return;
+  }
+
+
+  if (buttonA->changed() && !buttonA->pressed())
+  {
+    switch (selected)
+    {
+      case 0:
+        setCurrentState(new DefaultState());
+        return;
+
+      case 1:
+        resetHits();
+        break;
+
+      case 2:
+        resetShots();
+        break;
+
+      case 3:
+        resetHits();
+        resetShots();
+        break;
+    }
+
+    outroStart = currentTime;
+    outro = true;
+    return;
+  }
+
+  if (buttonB->changed() && !buttonB->pressed())
+  {
+    selected++;
+    if (selected > 3)
+      selected = 0;
+  }
+
+
+  switch (selected)
+  {
+    case 0:
+    {
+      char text[] = "Cancel";
+      display->writeTextLeft(text);
+      break;
+    }
+
+    case 1:
+    {
+      char text[] = "Hits";
+      display->writeTextLeft(text);
+      break;
+    }
+
+    case 2:
+    {
+      char text[] = "Shots";
+      display->writeTextLeft(text);
+      break;
+    }
+
+    case 3:
+    {
+      char text[] = "Both";
+      display->writeTextLeft(text);
+      break;
+    }
+  }
+}
+
+
+void ResetState::loopOutro()
+{
+  if (currentTime - outroStart >= NerfResetOutroTime)
+  {
+    setCurrentState(new DefaultState());
+    return;
+  }
+
+  char text[] = "Done";
+  display->writeTextLeft(text);
+}

StateReset.h

@@ -0,0 +1,31 @@
+#ifndef StateReset_h
+#define StateReset_h
+
+#include "StateHandler.h"
+#include "Arduino.h"
+
+
+/**
+ * Reset state
+ *
+ * Shows a menu providing reset options. A confirms the
+ * selection, B switches to the next.
+**/
+class ResetState : public AbstractStateHandler
+{
+  private:
+    bool intro;
+    unsigned long introStart;
+    bool outro;
+    unsigned long outroStart;
+    byte selected;
+
+  protected:
+    void loopOutro();
+
+  public:
+    void setup();
+    void loop();
+};
+
+#endif

reset/NerfStatTrakReset.ino

@@ -0,0 +1,51 @@
+#include "EEPROM.h"
+
+/*
+
+  How the EEPROM is used:
+
+
+  First byte: shot counter offset
+  Second byte: hit counter offset
+
+  Each counter is a 32-bit unsigned integer (4 bytes). When it reaches a treshold
+  which is < 100,000 (the recommended EEPROM cell write limit) a new offset is calculated.
+  This way we ensure no cell is written over 100,000 times (assuming the EEPROM is
+  new) and you can click away until you run out of EEPROM.
+
+
+  For initialisation set ShotCounterOffset and HitCounterOffset to
+  different values. Keep in mind that Offset * 4 must not be greater than
+  the amount of available EEPROM!
+
+  Shot/HitCounterInitial defines the default value to write for
+  each counters.
+
+*/
+#define ShotCounterOffset 0
+#define HitCounterOffset 1
+
+#define ShotCounterInitial 0
+#define HitCounterInitial 0
+
+#define counterLocation(offset) 2 + (offset * sizeof(uint32_t))
+
+void setup()
+{
+  EEPROM.update(0, ShotCounterOffset);
+  EEPROM.update(1, HitCounterOffset);
+
+  EEPROM.put(counterLocation(ShotCounterOffset), (uint32_t)ShotCounterInitial);
+  EEPROM.put(counterLocation(HitCounterOffset), (uint32_t)HitCounterInitial);
+
+  pinMode(LED_BUILTIN, OUTPUT);
+}
+
+
+void loop()
+{
+  digitalWrite(LED_BUILTIN, HIGH);
+  delay(1000);
+  digitalWrite(LED_BUILTIN, LOW);
+  delay(1000);
+}