eeprom config

src/config.cpp

@@ -0,0 +1,83 @@
+#include <EEPROM.h>
+#include "config.h"
+
+uint32_t calculateChecksum(Config *ptr);
+
+void config_defaults();
+
+bool validateChecksum(uint32_t checksumEEPROM, Config &tmp);
+
+Config config;
+
+bool dirty = false;
+
+unsigned long lastDirtyMillis = 0;
+
+void config_setup() {
+  if (!config_load()) {
+    config_defaults();
+  }
+}
+
+void config_set_dirty() {
+  dirty = true;
+  lastDirtyMillis = millis();
+}
+
+void config_loop() {
+  if (!dirty) {
+    return;
+  }
+  if (millis() - lastDirtyMillis <= 30000) {
+    return;
+  }
+  dirty = false;
+
+  uint32_t checksum = calculateChecksum(&config);
+
+  EEPROM.begin(512);
+  EEPROM.writeBytes(0, &config, sizeof(Config));
+  EEPROM.writeUInt(sizeof(Config), checksum);
+  EEPROM.end();
+
+  Serial.printf("Config saved to EEPROM.\n");
+}
+
+bool config_load() {
+  Config tmp{};
+
+  EEPROM.begin(512);
+  EEPROM.readBytes(0, &tmp, sizeof(Config));
+  uint32_t checksum = EEPROM.readUInt(sizeof(Config));
+  EEPROM.end();
+
+  bool success = validateChecksum(checksum, tmp);
+  if (success) {
+    memcpy(&config, &tmp, sizeof(Config));
+    Serial.printf("Config loaded from EEPROM.\n");
+  } else {
+    Serial.printf("Failed to load config from EEPROM.\n");
+  }
+
+  return success;
+}
+
+bool validateChecksum(uint32_t checksumEEPROM, Config &tmp) {
+  uint32_t calculated = calculateChecksum(&tmp);
+  return checksumEEPROM == calculated;
+}
+
+void config_defaults() {
+  config.mode = GAME_OF_LIFE_GRAYSCALE;
+  config.speed = 1.0;
+  config.brightness = 16;
+  Serial.printf("Config DEFAULTS loaded.\n");
+}
+
+uint32_t calculateChecksum(Config *ptr) {
+  uint32_t checksum = 0;
+  for (auto *b = (uint8_t *) ptr; b < (uint8_t *) ptr + sizeof(Config); b++) {
+    checksum += *b;
+  }
+  return checksum;
+}

src/config.h

@@ -0,0 +1,22 @@
+#ifndef MEDIATABLE_CONFIG_H
+#define MEDIATABLE_CONFIG_H
+
+#include "mode/Mode.h"
+
+struct Config {
+    ModeId mode;
+    double speed;
+    uint8_t brightness;
+};
+
+extern Config config;
+
+void config_setup();
+
+void config_loop();
+
+bool config_load();
+
+void config_set_dirty();
+
+#endif

src/display/Display.h

@@ -40,9 +40,9 @@ private:
 public:
 
     Display(uint8_t width, uint8_t height) :
-      width(width), height(height),
-      pixelCount(width * height),
-      leds(pixelCount, GPIO_NUM_13) {
+        width(width), height(height),
+        pixelCount(width * height),
+        leds(pixelCount, GPIO_NUM_13) {
       // nothing
     }
 
@@ -121,7 +121,7 @@ public:
     }
 
     void setBrightness(int brightness) {
-      leds.setBrightness(min(255, max(0, brightness)));
+      leds.setBrightness(max(0, min(brightness, 255)));
     }
 
     int getBrightness() {

src/main.cpp

@@ -6,6 +6,7 @@
 #include "display/Display.h"
 #include <WebServer.h>
 #include <esp_sntp.h>
+#include <EEPROM.h>
 
 #include "mode/GameOfLife/GameOfLife.h"
 #include "mode/Pong/Pong.h"
@@ -13,34 +14,18 @@
 #include "mode/SpaceInvaders/SpaceInvaders.h"
 #include "mode/NewYear/NewYear.h"
 #include "mode/Border/Border.h"
-
-enum ModeId {
-    NONE,
-    BORDER,
-    CLOCK,
-    GAME_OF_LIFE_BLACK_WHITE,
-    GAME_OF_LIFE_GRAYSCALE,
-    GAME_OF_LIFE_COLOR_FADE,
-    GAME_OF_LIFE_RANDOM_COLOR,
-    PONG,
-    SPACE_INVADERS,
-    NEW_YEAR,
-};
+#include "config.h"
 
 WebServer server(80);
 
 Display display(32, 8);
 
-ModeId newModeId = NEW_YEAR;
-
 ModeId currentModeId = NONE;
 
 microseconds_t lastMicros = 0;
 
 ModeBase *mode = nullptr;
 
-double speed = 1.0;
-
 bool connected = false;
 
 void mode_check();
@@ -51,9 +36,9 @@ void unloadOldMode();
 
 void loadNewMode();
 
-void setBrightness(int value);
+void setBrightness(int brightness);
 
-void setSpeed(double value);
+void setSpeed(double speed);
 
 void serial_read();
 
@@ -63,6 +48,8 @@ void ntp_setup();
 
 uint32_t ip2int(const IPAddress &ip);
 
+void setMode(ModeId value);
+
 void web_index() {
   server.setContentLength(CONTENT_LENGTH_UNKNOWN);
   server.send(200, "text/html", "");
@@ -77,6 +64,7 @@ void web_index() {
   server.sendContent("<a href='/mode?mode=8'>SPACE_INVADERS</a><br>");
   server.sendContent("<a href='/mode?mode=9'>NEW_YEAR</a><br>");
   server.sendContent("Helligkeit: <a href='/brighter'>+</a> / <a href='/darker'>-</a><br>");
+  server.sendContent("Geschwindigkeit: <a href='/faster'>+</a> / <a href='/slower'>-</a><br>");
   server.client().flush();
 }
 
@@ -90,11 +78,19 @@ void web_setMode() {
     server.send(400, "text/plain", "'mode' not a number");
     return;
   }
-  newModeId = (ModeId) value;
+  setMode((ModeId) value);
   server.sendHeader("location", "/");
   server.send(301, "text/plain", "ok");
 }
 
+void setMode(ModeId value) {
+  if (config.mode == value) {
+    return;
+  }
+  config.mode = value;
+  config_set_dirty();
+}
+
 void web_brighter() {
   setBrightness(display.getBrightness() + 10);
   server.sendHeader("location", "/");
@@ -107,6 +103,18 @@ void web_darker() {
   server.send(301, "text/plain", "ok");
 }
 
+void web_faster() {
+  setSpeed(config.speed * 1.1);
+  server.sendHeader("location", "/");
+  server.send(301, "text/plain", "ok");
+}
+
+void web_slower() {
+  setSpeed(config.speed / 1.1);
+  server.sendHeader("location", "/");
+  server.send(301, "text/plain", "ok");
+}
+
 void setup() {
   delay(500);
   Serial.begin(115200);
@@ -142,8 +150,11 @@ void setup() {
   ArduinoOTA.begin();
   yield();
 
+  config_setup();
+
   display.setup();
   yield();
+  display.setBrightness(config.brightness);
 
   server.on("", web_index);
   server.on("/", web_index);
@@ -153,15 +164,20 @@ void setup() {
   server.on("/brighter/", web_brighter);
   server.on("/darker", web_darker);
   server.on("/darker/", web_darker);
+  server.on("/faster", web_faster);
+  server.on("/faster/", web_faster);
+  server.on("/slower", web_slower);
+  server.on("/slower/", web_slower);
   server.begin();
 }
 
 void loop() {
   yield();
   ArduinoOTA.handle();
-  server.handleClient();
-  wifi_loop();
   serial_read();
+  server.handleClient();
+  config_loop();
+  wifi_loop();
   mode_check();
   display.loop();
   mode_step();
@@ -225,7 +241,7 @@ void serial_read() {
       case '7':
       case '8':
       case '9':
-        newModeId = (ModeId) (input - '0');
+        setMode((ModeId) (input - '0'));
         break;
       case '+':
         setBrightness(display.getBrightness() + 10);
@@ -234,10 +250,10 @@ void serial_read() {
         setBrightness(max(1, display.getBrightness() - 10));
         break;
       case ',':
-        setSpeed(speed / 1.1);
+        setSpeed(config.speed / 1.1);
         break;
       case '.':
-        setSpeed(speed * 1.1);
+        setSpeed(config.speed * 1.1);
         break;
       default:
         Serial.printf("Unknown command: %c\n", input);
@@ -246,18 +262,29 @@ void serial_read() {
   }
 }
 
-void setBrightness(int value) {
-  display.setBrightness(value);
-  Serial.printf("Setting brightness to %5.1f%%\n", value / 2.55);
+void setBrightness(int brightness) {
+  brightness = max(0, min(brightness, 255));
+  if (display.getBrightness() == brightness) {
+    return;
+  }
+  config.brightness = brightness;
+  display.setBrightness(brightness);
+  config_set_dirty();
+  Serial.printf("Setting brightness to %5.1f%%\n", brightness / 2.55);
 }
 
-void setSpeed(double value) {
-  speed = value;
-  Serial.printf("Setting speed to %6.2fx\n", value);
+void setSpeed(double speed) {
+  speed = min(max(0.01, speed), 10000.0);
+  if (config.speed == speed) {
+    return;
+  }
+  config.speed = speed;
+  config_set_dirty();
+  Serial.printf("Setting speed to %6.2fx\n", config.speed);
 }
 
 void mode_check() {
-  if (currentModeId != newModeId) {
+  if (currentModeId != config.mode) {
     unloadOldMode();
     loadNewMode();
   }
@@ -272,11 +299,9 @@ void unloadOldMode() {
 }
 
 void loadNewMode() {
-  currentModeId = newModeId;
+  currentModeId = config.mode;
   lastMicros = 0;
   switch (currentModeId) {
-    case NONE:
-      break;
     case BORDER:
       mode = new Border(&display);
       break;
@@ -304,6 +329,9 @@ void loadNewMode() {
     case NEW_YEAR:
       mode = new NewYear(&display);
       break;
+    default:
+      Serial.print("No mode loaded.\n");
+      break;
   }
   Serial.printf("Mode: %s\n", mode == nullptr ? "None" : mode->getName());
 }
@@ -313,7 +341,7 @@ void mode_step() {
     return;
   }
   auto currentMicros = (int64_t) micros();
-  microseconds_t dt = (microseconds_t) min(1000000.0, max(1.0, (double) (currentMicros - lastMicros) * speed));
+  microseconds_t dt = (microseconds_t) min(1000000.0, max(1.0, (double) (currentMicros - lastMicros) * config.speed));
   lastMicros = currentMicros;
   mode->step(dt);
 }

src/mode/Mode.h

@@ -8,6 +8,19 @@
 #include "Timer.h"
 #include "ModeBase.h"
 
+enum ModeId {
+    NONE,
+    BORDER,
+    CLOCK,
+    GAME_OF_LIFE_BLACK_WHITE,
+    GAME_OF_LIFE_GRAYSCALE,
+    GAME_OF_LIFE_COLOR_FADE,
+    GAME_OF_LIFE_RANDOM_COLOR,
+    PONG,
+    SPACE_INVADERS,
+    NEW_YEAR,
+};
+
 template<typename T>
 class Mode : public ModeBase {
 

src/mode/NewYear/NewYear.h

@@ -36,7 +36,6 @@ class NewYear : public Mode<NewYear> {
       display->clear();
       if (!ok) {
         drawNoTime();
-        drawSubSecondsBar(info.tm_sec);
       } else if (info.tm_mon == 1 && info.tm_mday == 1 && info.tm_hour == 0) {
         drawYear(counter, info.tm_year + 1900);
         drawFirework(timer->interval);