Update camera example for support LED Intensity

Author: DmytroKorniienko

libraries/ESP32/examples/Camera/CameraWebServer/CameraWebServer.ino

@@ -1,6 +1,5 @@
 #include "esp_camera.h"
 #include <WiFi.h>
-
 //
 // WARNING!!! PSRAM IC required for UXGA resolution and high JPEG quality
 //            Ensure ESP32 Wrover Module or other board with PSRAM is selected
@@ -10,26 +9,21 @@
 //            Face Recognition is DISABLED for ESP32 and ESP32-S2, because it takes up from 15 
 //            seconds to process single frame. Face Detection is ENABLED if PSRAM is enabled as well
 
-// ===================
-// Select camera model
-// ===================
-//#define CAMERA_MODEL_WROVER_KIT // Has PSRAM
-//#define CAMERA_MODEL_ESP_EYE // Has PSRAM
-//#define CAMERA_MODEL_ESP32S3_EYE // Has PSRAM
-//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM
-//#define CAMERA_MODEL_M5STACK_V2_PSRAM // M5Camera version B Has PSRAM
-//#define CAMERA_MODEL_M5STACK_WIDE // Has PSRAM
-//#define CAMERA_MODEL_M5STACK_ESP32CAM // No PSRAM
-//#define CAMERA_MODEL_M5STACK_UNITCAM // No PSRAM
-#define CAMERA_MODEL_AI_THINKER // Has PSRAM
-//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM
-// ** Espressif Internal Boards **
-//#define CAMERA_MODEL_ESP32_CAM_BOARD
-//#define CAMERA_MODEL_ESP32S2_CAM_BOARD
-//#define CAMERA_MODEL_ESP32S3_CAM_LCD
-
+#include "board.h" // Select camera model here (moved since dependencies)
 #include "camera_pins.h"
 
+#ifdef CAMERA_MODEL_AI_THINKER
+#ifndef CONFIG_LED_ILLUMINATOR_ENABLED
+#define CONFIG_LED_ILLUMINATOR_ENABLED 1
+#endif
+#include "soc/soc.h"
+#include "soc/rtc_cntl_reg.h"
+#endif
+
+#if defined(CONFIG_LED_ILLUMINATOR_ENABLED)
+void ledc_setup();
+#endif
+
 // ===========================
 // Enter your WiFi credentials
 // ===========================
@@ -43,6 +37,10 @@ void setup() {
   Serial.setDebugOutput(true);
   Serial.println();
 
+#ifdef CAMERA_MODEL_AI_THINKER
+  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
+#endif
+
   camera_config_t config;
   config.ledc_channel = LEDC_CHANNEL_0;
   config.ledc_timer = LEDC_TIMER_0;
@@ -139,6 +137,10 @@ void setup() {
   Serial.print("Camera Ready! Use 'http://");
   Serial.print(WiFi.localIP());
   Serial.println("' to connect");
+
+#if defined(CONFIG_LED_ILLUMINATOR_ENABLED)
+  ledc_setup();
+#endif  
 }
 
 void loop() {

libraries/ESP32/examples/Camera/CameraWebServer/app_httpd.cpp

@@ -17,6 +17,21 @@
 #include "img_converters.h"
 #include "fb_gfx.h"
 #include "driver/ledc.h"
+
+#include "board.h"
+
+#if defined(CAMERA_MODEL_AI_THINKER)
+#ifndef CONFIG_LED_ILLUMINATOR_ENABLED
+#define CONFIG_LED_ILLUMINATOR_ENABLED 1
+#endif
+#define CONFIG_LED_MAX_INTENSITY 255
+#define CONFIG_LED_LEDC_CHANNEL LEDC_CHANNEL_0
+#endif
+
+#ifdef CONFIG_LED_ILLUMINATOR_ENABLED
+#include "esp32-hal-ledc.h"
+#endif
+
 #include "sdkconfig.h"
 #include "camera_index.h"
 
@@ -279,6 +294,13 @@ static int run_face_recognition(fb_data_t *fb, std::list<dl::detect::result_t> *
 #endif
 
 #ifdef CONFIG_LED_ILLUMINATOR_ENABLED
+void ledc_setup()
+{
+  // PWM
+  ledcSetup(LEDC_CHANNEL_0, 4000, LEDC_TIMER_8_BIT);
+  ledcAttachPin(GPIO_NUM_4, LEDC_CHANNEL_0); // GPIO_NUM_4 = 4
+}
+
 void enable_led(bool en)
 { // Turn LED On or Off
     int duty = en ? led_duty : 0;

libraries/ESP32/examples/Camera/CameraWebServer/board.h

@@ -0,0 +1,17 @@
+// ===================
+// Select camera model
+// ===================
+//#define CAMERA_MODEL_WROVER_KIT // Has PSRAM
+//#define CAMERA_MODEL_ESP_EYE // Has PSRAM
+//#define CAMERA_MODEL_ESP32S3_EYE // Has PSRAM
+//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM
+//#define CAMERA_MODEL_M5STACK_V2_PSRAM // M5Camera version B Has PSRAM
+//#define CAMERA_MODEL_M5STACK_WIDE // Has PSRAM
+//#define CAMERA_MODEL_M5STACK_ESP32CAM // No PSRAM
+//#define CAMERA_MODEL_M5STACK_UNITCAM // No PSRAM
+#define CAMERA_MODEL_AI_THINKER // Has PSRAM
+//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM
+// ** Espressif Internal Boards **
+//#define CAMERA_MODEL_ESP32_CAM_BOARD
+//#define CAMERA_MODEL_ESP32S2_CAM_BOARD
+//#define CAMERA_MODEL_ESP32S3_CAM_LCD