CYD ESP32_2432S028 Brightness option in config

src/drivers/displays/esp23_2432s028r.cpp

@@ -76,6 +76,12 @@ void esp32_2432S028R_Init(void)
   TFT_eTouchBase::Calibation calibation = { 233, 3785, 3731, 120, 2 };
   touch.setCalibration(calibation);
 
+  // Configuring screen backlight brightness using ledcontrol channel 0.
+  // Using 5000Hz in 8bit resolution, which gives 0-255 possible duty cycle setting.
+  ledcSetup(0, 5000, 8);
+  ledcAttachPin(TFT_BL, 0);
+  ledcWrite(0, Settings.Brightness);
+ 
   //background.createSprite(WIDTH, HEIGHT); // Background Sprite
   //background.setSwapBytes(true);
   //render.setDrawer(background);  // Link drawing object to background instance (so font will be rendered on background)
@@ -103,9 +109,14 @@ void esp32_2432S028R_Init(void)
 
 void esp32_2432S028R_AlternateScreenState(void)
 {
-  int screen_state = digitalRead(TFT_BL);
   Serial.println("Switching display state");
-  digitalWrite(TFT_BL, !screen_state);
+  int screen_state_duty = ledcRead(0);
+  // Switching the duty cycle for the ledc channel, where the TFT_BL pin is attached.
+  if (screen_state_duty > 0) {
+    ledcWrite(0, 0);
+  } else {
+    ledcWrite(0, Settings.Brightness);
+  }
 }
 
 void esp32_2432S028R_AlternateRotation(void)
@@ -533,6 +544,10 @@ void esp32_2432S028R_DoLedStuff(unsigned long frame)
           if (((t_x > 109)&&(t_x < 211)) && ((t_y > 185)&&(t_y < 241))) {
             bottomScreenBlue ^= true;
             hasChangedScreen = true;
+          } else if((t_x > 235) && ((t_y > 0)&&(t_y < 16))) {
+            // Touching the top right corner of the screen, roughly in the gray status label.
+            // Disabling the screen backlight. 
+            esp32_2432S028R_AlternateScreenState();
           }
           else
             if (t_x > 160) {

src/drivers/storage/SDCard.cpp

@@ -128,6 +128,11 @@ bool SDCard::loadConfigFile(TSettings* Settings)
                     } else {
                         Settings->invertColors = false;
                     }
+                    if (json.containsKey(JSON_KEY_BRIGHTNESS)) {
+                        Settings->Brightness = json[JSON_KEY_BRIGHTNESS].as<int>();
+                    } else {
+                        Settings->Brightness = 250;
+                    }
                     // Serial.printf("Carteira Lida SD:%s\n", Settings.BtcWallet);       
                     Serial.printf("Carteira Lida SDs:%s\n", Settings->BtcWallet);                       
                     return true;

src/drivers/storage/nvMemory.cpp

@@ -36,6 +36,7 @@ bool nvMemory::saveConfig(TSettings* Settings)
         json[JSON_SPIFFS_KEY_TIMEZONE] = Settings->Timezone;
         json[JSON_SPIFFS_KEY_STATS2NV] = Settings->saveStats;
         json[JSON_SPIFFS_KEY_INVCOLOR] = Settings->invertColors;
+        json[JSON_SPIFFS_KEY_BRIGHTNESS] = Settings->Brightness;
 
         // Open config file
         File configFile = SPIFFS.open(JSON_CONFIG_FILE, "w");
@@ -103,6 +104,11 @@ bool nvMemory::loadConfig(TSettings* Settings)
                     } else {
                         Settings->invertColors = false;
                     }
+                    if (json.containsKey(JSON_SPIFFS_KEY_BRIGHTNESS)) {
+                        Settings->Brightness = json[JSON_SPIFFS_KEY_BRIGHTNESS].as<int>();
+                    } else {
+                        Settings->Brightness = 250;
+                    }
                     return true;
                 }
                 else

src/drivers/storage/storage.h

@@ -19,6 +19,7 @@
 #define DEFAULT_TIMEZONE	2
 #define DEFAULT_SAVESTATS	false
 #define DEFAULT_INVERTCOLORS	false
+#define DEFAULT_BRIGHTNESS	250
 
 // JSON config files
 #define JSON_CONFIG_FILE	"/config.json"
@@ -33,6 +34,7 @@
 #define JSON_KEY_TIMEZONE	"Timezone"
 #define JSON_KEY_STATS2NV	"SaveStats"
 #define JSON_KEY_INVCOLOR	"invertColors"
+#define JSON_KEY_BRIGHTNESS	"Brightness"
 
 // JSON config file SPIFFS (different for backward compatibility with existing devices)
 #define JSON_SPIFFS_KEY_POOLURL		"poolString"
@@ -42,6 +44,7 @@
 #define JSON_SPIFFS_KEY_TIMEZONE	"gmtZone"
 #define JSON_SPIFFS_KEY_STATS2NV	"saveStatsToNVS"
 #define JSON_SPIFFS_KEY_INVCOLOR	"invertColors"
+#define JSON_SPIFFS_KEY_BRIGHTNESS	"Brightness"
 
 // settings
 struct TSettings
@@ -55,6 +58,7 @@ struct TSettings
 	int Timezone{ DEFAULT_TIMEZONE };
 	bool saveStats{ DEFAULT_SAVESTATS };
 	bool invertColors{ DEFAULT_INVERTCOLORS };
+	int Brightness{ DEFAULT_BRIGHTNESS };
 };
 
 #endif // _STORAGE_H_

src/wManager.cpp

@@ -187,6 +187,13 @@ void init_WifiManager()
   }
   WiFiManagerParameter invertColors("inverColors", "Invert Display Colors (if the colors looks weird)", "T", 2, checkboxParams2, WFM_LABEL_AFTER);
   wm.addParameter(&invertColors);
+  #endif
+  #if defined(ESP32_2432S028R) || defined(ESP32_2432S028_2USB)
+    char brightnessConvValue[2];
+    sprintf(brightnessConvValue, "%d", Settings.Brightness);
+    // Text box (Number) - 3 characters maximum
+    WiFiManagerParameter brightness_text_box_num("Brightness", "Screen backlight Duty Cycle (0-255)", brightnessConvValue, 3);
+    wm.addParameter(&brightness_text_box_num);
   #endif
 
     Serial.println("AllDone: ");
@@ -211,6 +218,9 @@ void init_WifiManager()
             #ifdef ESP32_2432S028R
                 Settings.invertColors = (strncmp(invertColors.getValue(), "T", 1) == 0);
             #endif
+            #if defined(ESP32_2432S028R) || defined(ESP32_2432S028_2USB)
+                Settings.Brightness = atoi(brightness_text_box_num.getValue());
+            #endif
             nvMem.saveConfig(&Settings);
             delay(3*SECOND_MS);
             //reset and try again, or maybe put it to deep sleep
@@ -241,6 +251,9 @@ void init_WifiManager()
                 #ifdef ESP32_2432S028R
                 Settings.invertColors = (strncmp(invertColors.getValue(), "T", 1) == 0);
                 #endif
+                #if defined(ESP32_2432S028R) || defined(ESP32_2432S028_2USB)
+                Settings.Brightness = atoi(brightness_text_box_num.getValue());
+                #endif
                 nvMem.saveConfig(&Settings);
                 vTaskDelay(2000 / portTICK_PERIOD_MS);      
             }        
@@ -290,6 +303,12 @@ void init_WifiManager()
         Serial.println(Settings.invertColors);        
         #endif
 
+        #if defined(ESP32_2432S028R) || defined(ESP32_2432S028_2USB)
+        Settings.Brightness = atoi(brightness_text_box_num.getValue());
+        Serial.print("Brightness: ");
+        Serial.println(Settings.Brightness);
+        #endif
+
     }
 
     // Save the custom parameters to FS
@@ -299,6 +318,9 @@ void init_WifiManager()
         #ifdef ESP32_2432S028R
          if (Settings.invertColors) ESP.restart();                
         #endif
+        #if defined(ESP32_2432S028R) || defined(ESP32_2432S028_2USB)
+        if (Settings.Brightness != 250) ESP.restart();
+        #endif
     }
 }