display code clean

platformio.ini

@@ -2,6 +2,7 @@
 platform = espressif32
 board = esp32dev
 framework = arduino
+board_build.filesystem = littlefs
 lib_deps = https://github.com/adafruit/Adafruit_NeoPixel
 upload_port = /dev/ttyUSB0
 upload_speed = 460800

src/Color.cpp

@@ -1,6 +1,6 @@
 #include "Color.h"
 
-#define ___     0
+#define ___     0 // NOLINT(*-reserved-identifier)
 #define QQQ     64
 #define TTT     85
 #define HHH     127

src/Color.h

@@ -1,12 +1,12 @@
-#ifndef WS2812B_COLOR_H
+#ifndef SPORTTAFEL_COLOR_H
-#define WS2812B_COLOR_H
+#define SPORTTAFEL_COLOR_H
 
 #include <Arduino.h>
 
 struct Color {
   uint8_t r, g, b;
 
-  Color(uint8_t r, uint8_t g, uint8_t b) : r(r), g(g), b(b) {
+  Color(const uint8_t r, const uint8_t g, const uint8_t b) : r(r), g(g), b(b) {
     //
   }
 

src/button.cpp

@@ -1,38 +1,47 @@
 #include "button.h"
 
 #include <Arduino.h>
-#include "countdown.h"
+
+#define BUTTON_GPIO         25
+#define BUTTON_INVERT       true
+#define BUTTON_PULL_UP      true
+#define BUTTON_DEBOUNCE     100
+#define BUTTON_LONG_PRESS   1000
 
 bool buttonLastState = false;
 
-bool buttonLongPressed = false;
+bool buttonLongPressedSent = false;
 
 unsigned long buttonLastMillis = 0;
 
+bool buttonRead() {
+  return BUTTON_INVERT ^ (digitalRead(BUTTON_GPIO) == HIGH);
+}
+
 void buttonSetup() {
-  pinMode(25, INPUT_PULLUP);
+  pinMode(BUTTON_GPIO, BUTTON_PULL_UP ? INPUT_PULLUP : INPUT);
-  buttonLastState = digitalRead(25) == LOW;
+  buttonLastState = buttonRead();
   buttonLastMillis = millis();
 }
 
 void buttonLoop() {
-  const auto currentMillis = millis();
+  const auto now = millis();
-  const auto durationMillis = currentMillis - buttonLastMillis;
+  const auto duration = now - buttonLastMillis;
-  if (durationMillis >= 100) {
+  if (duration < BUTTON_DEBOUNCE) {
-    const auto currentState = digitalRead(25) == LOW;
+    return;
-    if (buttonLastState != currentState) {
-      buttonLastState = currentState;
-      buttonLastMillis = currentMillis;
-      buttonLongPressed = false;
-      if (!buttonLastState) {
-        if (durationMillis < 1000) {
-          countdownShortPress();
   }
+
+  const auto state = buttonRead();
+  if (buttonLastState != state) {
+    if (state) {
+      buttonLongPressedSent = false;
+    } else if (duration < BUTTON_LONG_PRESS && !buttonLongPressedSent) {
+      buttonShortPressed();
     }
-    }
+    buttonLastState = state;
-  }
+    buttonLastMillis = now;
-  if (buttonLastState && currentMillis - buttonLastMillis >= 1000 && !buttonLongPressed) {
+  } else if (buttonLastState && duration >= BUTTON_LONG_PRESS && !buttonLongPressedSent) {
-    buttonLongPressed = true;
+    buttonLongPressedSent = true;
-    countdownLongPress();
+    buttonLongPressed();
   }
 }

src/button.h

@@ -1,8 +1,12 @@
-#ifndef WS2812B_BUTTON_H
+#ifndef SPORTTAFEL_BUTTON_H
-#define WS2812B_BUTTON_H
+#define SPORTTAFEL_BUTTON_H
 
 void buttonSetup();
 
 void buttonLoop();
 
+void buttonShortPressed();
+
+void buttonLongPressed();
+
 #endif

src/countdown.cpp

@@ -1,5 +1,5 @@
 #include "countdown.h"
-
+#include <LittleFS.h>
 #include "display.h"
 
 enum State {
@@ -8,9 +8,11 @@ enum State {
 
 State state = CONFIG;
 
-long configMillis = 6 * 60 * 1000;
+bool countdownConfigDirty = false;
 
-long rest = configMillis;
+long countdownMillis = 6 * 60 * 1000;
+
+long countdownRest = countdownMillis;
 
 unsigned long last = 0;
 
@@ -21,42 +23,18 @@ void updateTime() {
   const auto now = max(1UL, millis());
   if (last != 0) {
     const auto diff = now - last;
-    rest -= (long) diff;
+    countdownRest -= static_cast<long>(diff);
-    if (rest < 0) {
+    if (countdownRest < 0) {
-      rest = 0;
+      countdownRest = 0;
     }
   }
   last = now;
 }
 
-void drawDashes() {
-  displayClear();
-  drawChar(0, '-', true, RED);
-  drawChar(1, '-', true, RED);
-  drawChar(2, '-', true, RED);
-  drawChar(3, '-', true, RED);
-  displayShow();
-}
-
-void drawWhite() {
-  displayClear();
-  drawChar(0, '8', true, WHITE);
-  drawChar(1, '8', true, WHITE);
-  drawDots(WHITE, WHITE, WHITE, WHITE);
-  drawChar(2, '8', true, WHITE);
-  drawChar(3, '8', true, WHITE);
-  displayShow();
-}
-
-void drawBlack() {
-  displayClear();
-  displayShow();
-}
-
 void drawSequence() {
   for (int x = 0; x < 3; ++x) {
     for (int i = 0; i < 2; ++i) {
-      drawWhite();
+      drawAll(WHITE);
       delay(100);
       drawBlack();
       delay(100);
@@ -66,20 +44,20 @@ void drawSequence() {
   }
 }
 
-void setState(State newState) {
+void setState(const State newState) {
   if (state == newState) {
     return;
   }
 
   state = newState;
-  const char *name;
+  const char* name;
   switch (state) {
     case CONFIG:
-      rest = configMillis;
+      countdownRest = countdownMillis;
       name = "CONFIG";
       break;
     case READY:
-      rest = configMillis;
+      countdownRest = countdownMillis;
       name = "READY";
       break;
     case RUNNING:
@@ -103,15 +81,15 @@ void setState(State newState) {
 void countdownUpdate() {
   switch (state) {
     case CONFIG:
-      drawMillis(rest, MAGENTA);
+      drawMillis(countdownRest, MAGENTA);
       break;
     case READY:
-      drawMillis(rest, GREEN);
+      drawMillis(countdownRest, GREEN);
       break;
     case RUNNING: {
-      if (rest > 0) {
+      if (countdownRest > 0) {
-        const auto color = rest >= 60000 ? WHITE : (rest >= 10000 ? YELLOW : RED);
+        const auto color = countdownRest >= 60000 ? WHITE : (countdownRest >= 10000 ? YELLOW : RED);
-        drawMillis(rest, color);
+        drawMillis(countdownRest, color);
       } else {
         setState(END);
         setState(READY);
@@ -119,7 +97,7 @@ void countdownUpdate() {
       break;
     }
     case PAUSED:
-      drawMillis(rest, BLUE);
+      drawMillis(countdownRest, BLUE);
       break;
     case END:
       drawDashes();
@@ -127,7 +105,50 @@ void countdownUpdate() {
   }
 }
 
+void countdownConfigLoad() {
+  if (LittleFS.begin(true)) {
+    Serial.println("Filesystem mounted.");
+    File file = LittleFS.open("/countdownMillis");
+    if (file) {
+      const String content = file.readString();
+      if (content) {
+        countdownMillis = content.toInt();
+        Serial.printf("Read countdownMillis from file: countdownMillis=%lu, file=%s", countdownMillis, file.path());
+      } else {
+        Serial.printf("WARN: Cannot parse content of: %s\n", file.path());
+      }
+      file.close();
+    } else {
+      Serial.printf("WARN: Cannot open file for READ: %s\n", file.path());
+    }
+    LittleFS.end();
+    Serial.println("Filesystem unmounted.");
+  } else {
+    Serial.println("ERROR: Failed to mount filesystem.");
+  }
+}
+
+void countdownConfigWrite() {
+  if (LittleFS.begin(true)) {
+    Serial.println("Filesystem mounted.");
+    File file = LittleFS.open("/countdownMillis", "w", true);
+    if (file) {
+      file.printf("%lu", countdownMillis);
+      Serial.printf("Wrote countdownMillis to file: countdownMillis=%lu, file=%s", countdownMillis, file.path());
+      file.close();
+      countdownConfigDirty = false;
+    } else {
+      Serial.printf("WARN: Cannot open file for WRITE: %s\n", file.path());
+    }
+    LittleFS.end();
+    Serial.println("Filesystem unmounted.");
+  } else {
+    Serial.println("ERROR: failed to mount filesystem");
+  }
+}
+
 void countdownSetup() {
+  countdownConfigLoad();
   setState(READY);
 }
 
@@ -136,11 +157,15 @@ void countdownLoop() {
   countdownUpdate();
 }
 
-void countdownLongPress() {
+void buttonShortPressed() {
   switch (state) {
-    case CONFIG:
+    case CONFIG: {
-      setState(READY);
+      const auto seconds = (countdownMillis / 30000) * 30 % (15 * 60) + 30;
+      countdownMillis = seconds * 1000;
+      countdownRest = countdownMillis;
+      countdownConfigDirty = true;
       break;
+    }
     case READY:
     case END:
       setState(CONFIG);
@@ -152,14 +177,14 @@ void countdownLongPress() {
   }
 }
 
-void countdownShortPress() {
+void buttonLongPressed() {
   switch (state) {
-    case CONFIG: {
+    case CONFIG:
-      auto seconds = (configMillis / 30000) * 30 % (15 * 60) + 30;
+      if (countdownConfigDirty) {
-      configMillis = seconds * 1000;
+        countdownConfigWrite();
-      rest = configMillis;
-      break;
       }
+      setState(READY);
+      break;
     case RUNNING:
       setState(PAUSED);
       break;

src/countdown.h

@@ -1,12 +1,8 @@
-#ifndef WS2812B_COUNTDOWN_H
+#ifndef SPORTTAFEL_COUNTDOWN_H
-#define WS2812B_COUNTDOWN_H
+#define SPORTTAFEL_COUNTDOWN_H
 
 void countdownSetup();
 
 void countdownLoop();
 
-void countdownLongPress();
-
-void countdownShortPress();
-
 #endif

src/display.cpp

@@ -1,5 +1,7 @@
 #include "display.h"
 
+#include <Adafruit_NeoPixel.h>
+
 #define DIGIT_COUNT         4
 #define SEGMENTS_PER_DIGIT  7
 #define LEDS_PER_SEGMENT    6
@@ -30,7 +32,7 @@ uint8_t CHARS[] = {
   0b00000010, // -
 };
 
-int toIndex(char c) {
+int toIndex(const char c) {
   if (c >= '0' && c <= '9') {
     return c - '0';
   }
@@ -45,11 +47,12 @@ int toIndex(char c) {
       return 5;
     case '-':
       return 13;
-  }
+    default:
       return -1;
+  }
 }
 
-uint8_t mapChar(char c) {
+uint8_t mapChar(const char c) {
   const int index = toIndex(c);
   if (index >= 0) {
     return CHARS[index];
@@ -72,11 +75,11 @@ void displayShow() {
   pixels.show();
 }
 
-void drawChar(int digit, char c, const Color& color) {
+void drawChar(const int digit, const char c, const Color& color) {
   drawChar(digit, c, true, color);
 }
 
-void drawChar(int digit, char c, bool showIfZero, const Color& color) {
+void drawChar(const int digit, const char c, const bool showIfZero, const Color& color) {
   if (c == '0' && !showIfZero) {
     return;
   }
@@ -97,14 +100,14 @@ void drawChar(int digit, char c, bool showIfZero, const Color& color) {
   }
 }
 
-void drawNumber(int digit, int number, bool zero, const Color& color) {
+void drawNumber(const int digit, const int number, const bool zero, const Color& color) {
   const char ten = '0' + (number / 10 % 10);
   const char one = '0' + (number % 10);
   drawChar(digit + 0, ten, zero, color);
   drawChar(digit + 1, one, true, color);
 }
 
-void drawDot(int dot, const Color& c) {
+void drawDot(const int dot, const Color& c) {
   int index = 2 * SEGMENTS_PER_DIGIT * LEDS_PER_SEGMENT + dot * LEDS_PER_DOT;
   pixels.setPixelColor(index + 0, c.r, c.g, c.b);
   pixels.setPixelColor(index + 1, c.r, c.g, c.b);
@@ -117,11 +120,11 @@ void drawDots(const Color& bottom, const Color& middleBottom, const Color& middl
   drawDot(3, top);
 }
 
-void drawMillisDeci(unsigned long millisTotal, const Color& color) {
+void drawMillisDeci(const unsigned long millisTotal, const Color& color) {
   const auto secondsTotal = millisTotal / 1000;
-  const auto minutes = (int) secondsTotal / 60;
+  const auto minutes = static_cast<int>(secondsTotal) / 60;
-  const auto seconds = (int) secondsTotal % 60;
+  const auto seconds = static_cast<int>(secondsTotal) % 60;
-  const auto deci = (int) millisTotal / 100 % 10;
+  const auto deci = static_cast<int>(millisTotal) / 100 % 10;
 
   pixels.clear();
   if (minutes > 0) {
@@ -138,10 +141,10 @@ void drawMillisDeci(unsigned long millisTotal, const Color& color) {
   pixels.show();
 }
 
-void drawMillis(unsigned long millisTotal, const Color& color) {
+void drawMillis(const unsigned long millisTotal, const Color& color) {
-  const auto secondsTotal = (unsigned long) ceil(millisTotal / 1000.0);
+  const auto secondsTotal = static_cast<unsigned long>(ceil(millisTotal / 1000.0));
-  const auto minutes = (int) secondsTotal / 60;
+  const auto minutes = static_cast<int>(secondsTotal) / 60;
-  const auto seconds = (int) secondsTotal % 60;
+  const auto seconds = static_cast<int>(secondsTotal) % 60;
 
   pixels.clear();
   if (minutes > 0) {
@@ -151,3 +154,27 @@ void drawMillis(unsigned long millisTotal, const Color& color) {
   drawNumber(2, seconds, minutes > 0, color);
   pixels.show();
 }
+
+void drawDashes() {
+  displayClear();
+  drawChar(0, '-', true, RED);
+  drawChar(1, '-', true, RED);
+  drawChar(2, '-', true, RED);
+  drawChar(3, '-', true, RED);
+  displayShow();
+}
+
+void drawAll(const Color& color) {
+  displayClear();
+  drawChar(0, '8', true, color);
+  drawChar(1, '8', true, color);
+  drawDots(color, color, color, color);
+  drawChar(2, '8', true, color);
+  drawChar(3, '8', true, color);
+  displayShow();
+}
+
+void drawBlack() {
+  displayClear();
+  displayShow();
+}

src/display.h

@@ -1,7 +1,5 @@
-#ifndef WS2812B_DISPLAY_H
+#ifndef SPORTTAFEL_DISPLAY_H
-#define WS2812B_DISPLAY_H
+#define SPORTTAFEL_DISPLAY_H
-
-#include <Adafruit_NeoPixel.h>
 
 #include "Color.h"
 
@@ -23,4 +21,10 @@ void drawMillisDeci(unsigned long millisTotal, const Color& color);
 
 void drawMillis(unsigned long millisTotal, const Color& color);
 
+void drawDashes();
+
+void drawAll(const Color&);
+
+void drawBlack();
+
 #endif

src/main.cpp

@@ -1,6 +1,6 @@
-#include "display.h"
 #include "button.h"
 #include "countdown.h"
+#include "display.h"
 
 void setup() {
   delay(500);