Use the state machines to control the finger

Fixes uint16_t comparisons with millis(), removes DoublePressed state
in button.h.

code/button.h

@@ -1,78 +1,61 @@
 #include "debounce.h"
 
-template<uint16_t SLEEP_TIMEOUT, uint16_t LONGPRESS_TIMEOUT, uint16_t DOUBLEPRESS_TIMEOUT>
-class Button {
 
-    using DResult = Debounce<0>::Result;
+enum class ButtonEvent : uint8_t {
-
-    public:
-        enum class State : uint8_t {
-            Sleep,
-            Idle,
-            Pressed,
-            LongPressed,
-            Released,
-            DoublePressed,
-        };
-
-        enum class Result : uint8_t {
     NoEvent,
     Press,
     LongPress,
     DoublePress,
 };
 
-        Result event(DResult result) {
+// template wird komplett wegoptimiert (wie #define)
+template<uint16_t LONGPRESS_TIMEOUT, uint16_t DOUBLEPRESS_TIMEOUT>
+class Button {
+    public:
+        enum class State : uint8_t {
+            Idle,
+            Pressed,
+            LongPressed,
+            Released,
+        };
+
+
+        ButtonEvent event(RawButtonEvent result) {
             switch(state) {
-                case State::Sleep :
-                    state = State::Idle;
-                    counter = millis();
-                    break;
                 case State::Idle :
-                    if(result == DResult::Pressed) {
+                    if(result == RawButtonEvent::Pressed) {
                         state = State::Pressed;
                         counter = millis();
-                    } else if(millis() - counter >= SLEEP_TIMEOUT) {
-                        state = State::Sleep;
-                        // Activate Hardware sleep
                     }
                     break;
                 case State::Pressed :
-                    if(result == DResult::Released) {
+                    if(result == RawButtonEvent::Released) {
                         state = State::Released;
                         counter = millis();
-                    } else if(millis() - counter >= LONGPRESS_TIMEOUT) {
+                    } else if((uint16_t) millis() - counter >= LONGPRESS_TIMEOUT) {
                         state = State::LongPressed;
-                        return Result::LongPress;
+                        return ButtonEvent::LongPress;
                     }
                     break;
                 case State::Released :
-                    if(result == DResult::Pressed) {
+                    if(result == RawButtonEvent::Pressed) {
-                        state = State::DoublePressed;
-                    } else if(millis() - counter >= DOUBLEPRESS_TIMEOUT) {
                         state= State::Idle;
-                        counter = millis();
+                        return ButtonEvent::DoublePress;
-                        return Result::Press;
+                    } else if((uint16_t) millis() - counter >= DOUBLEPRESS_TIMEOUT) {
+                        state = State::Idle;
+                        return ButtonEvent::Press;
                     }
                     break;
                 case State::LongPressed :
-                    if(result == DResult::Released) {
+                    if(result == RawButtonEvent::Released) {
                         state = State::Idle;
-                        counter = millis();
                     } else {
-                        return Result::LongPress;
+                        return ButtonEvent::LongPress;
-                    }
-                    break;
-                case State::DoublePressed :
-                    if(result == DResult::Released) {
-                        state = State::Idle;
-                        counter = millis();
-                        return Result::DoublePress;
                     }
                     break;
             }
 
-            return Result::NoEvent;
+            return ButtonEvent::NoEvent;
         }
 
     private:

code/code.ino

@@ -17,6 +17,11 @@ std::uniform_int_distribution<uint8_t> distribution(1,16);
 
 SegmentDisplay<4, 2, 0> display;
 
+using MainButton = Button<150, 150>;
+
+Debounce<20> debounce;
+MainButton button;
+
 #define NUM_SLOWDOWN 12
 const uint16_t PROGMEM SLOWDOWN[NUM_SLOWDOWN] = {
     35, 32,
@@ -37,19 +42,66 @@ void setup() {
     display.write();
 }
 
+enum class State : uint8_t {
+    Idle,
+    Menu,
+    Counting,
+    Slowing
+};
+
+auto state = State::Idle;
+uint16_t timeout;
+
 void loop() {
-    if(digitalRead(PIN1)) {
     rng();
-        return;
+
+    bool buttonPressed = !digitalRead(PIN1);
+    auto event = button.event(debounce.event(buttonPressed));
+
+    switch(state) {
+        case State::Idle:
+            if(event == ButtonEvent::Press) {
+                state = State::Slowing;
+            } else if(event == ButtonEvent::LongPress) {
+                state = State::Counting;
+                timeout = millis();
+            } else if(event == ButtonEvent::DoublePress) {
+                state = State::Menu;
+            }
+            break;
+        case State::Menu:
+            // TODO
+            state = State::Idle;
+            break;
+        case State::Counting:
+            if(event == ButtonEvent::LongPress) {
+                // stay in this state
+                if((uint16_t) millis() - timeout >= 32) {
+                    displayNextNumber();
+                    timeout = millis();
+                }
+            } else {
+                state = State::Slowing;
+            }
+            break;
+        case State::Slowing:
+            slowdown();
+            state = State::Idle;
+            break;
+    }
 }
 
-    uint8_t num;
+static uint8_t currentNumber;
+void displayNextNumber() {
+    currentNumber = distribution(rng);
+    display.set(currentNumber);
+    display.write();
+}
 
+void slowdown() {
     for(size_t i = 0; i < NUM_SLOWDOWN; i += 2) {
         for(size_t j = 0; j < pgm_read_word_near(SLOWDOWN + i); ++j) {
-            num = distribution(rng);
+            displayNextNumber();
-            display.set(num);
-            display.write();
             delay(pgm_read_word_near(SLOWDOWN + i + 1));
         }
     }
@@ -58,7 +110,7 @@ void loop() {
         display.setOff();
         display.write();
         delay(250);
-        display.set(num);
+        display.set(currentNumber);
         display.write();
         delay(250);
     }

code/debounce.h

@@ -1,9 +1,15 @@
 #ifndef _DEBOUNCE_H_
 #define _DEBOUNCE_H_
 
-template<uint8_t DEBOUNCE_PRESSED, uint8_t DEBOUNCE_UNPRESSED = DEBOUNCE_PRESSED>
-class Debounce {
 
+enum class RawButtonEvent : uint8_t {
+    NoEvent,
+    Pressed,
+    Released,
+};
+
+template<uint16_t DEBOUNCE_PRESSED, uint16_t DEBOUNCE_UNPRESSED = DEBOUNCE_PRESSED>
+class Debounce {
     public:
         enum class State : uint8_t {
             Unpressed,
@@ -12,23 +18,18 @@ class Debounce {
             PressedDebounced,
         };
 
-        enum class Result : uint8_t {
-            NoEvent,
-            Pressed,
-            Released,
-        };
 
-        Result event(bool pressed) {
+        RawButtonEvent event(bool pressed) {
             switch(state) {
                 case State::Unpressed :
                     if(pressed) {
                         state = State::PressedDebounced;
                         counter = millis();
-                        return Result::Pressed;
+                        return RawButtonEvent::Pressed;
                     }
                     break;
                 case State::PressedDebounced :
-                    if(millis() - counter > DEBOUNCE_PRESSED) {
+                    if((uint16_t) millis() - counter > DEBOUNCE_PRESSED) {
                         state = State::Pressed;
                     }
                     break;
@@ -36,22 +37,22 @@ class Debounce {
                     if(!pressed) {
                         state = State::UnpressedDebounced;
                         counter = millis();
-                        return Result::Released;
+                        return RawButtonEvent::Released;
                     }
                     break;
                 case State::UnpressedDebounced :
-                    if(millis() - counter > DEBOUNCE_UNPRESSED) {
+                    if((uint16_t) millis() - counter > DEBOUNCE_UNPRESSED) {
                         state = State::Unpressed;
                     }
                     break;
             }
 
-            return Result::NoEvent;
+            return RawButtonEvent::NoEvent;
         }
 
     private:
         State state = State::Unpressed;
-        uint8_t counter = 0;
+        uint16_t counter = 0;
 };
 
 #endif