Add files to cmakelists and disconnect CDC if unplugged

CMakeLists.txt

@@ -17,6 +17,7 @@ set(CORE_SRCS
   cores/esp32/esp32-hal-timer.c
   cores/esp32/esp32-hal-touch.c
   cores/esp32/esp32-hal-uart.c
+  cores/esp32/esp32-hal-usb.c
   cores/esp32/esp32-hal-rmt.c
   cores/esp32/Esp.cpp
   cores/esp32/FunctionalInterrupt.cpp
@@ -61,6 +62,8 @@ set(LIBRARY_SRCS
   libraries/Ticker/src/Ticker.cpp
   libraries/Update/src/Updater.cpp
   libraries/Update/src/HttpsOTAUpdate.cpp
+  libraries/USB/src/USB.cpp
+  libraries/USB/src/USBCDC.cpp
   libraries/WebServer/src/WebServer.cpp
   libraries/WebServer/src/Parsing.cpp
   libraries/WebServer/src/detail/mimetable.cpp

libraries/USB/src/USBCDC.cpp

@@ -13,6 +13,7 @@
 // limitations under the License.
 #include "esp32-hal.h"
 #include "esp32-hal-tinyusb.h"
+#include "USB.h"
 #include "USBCDC.h"
 #if CONFIG_USB_ENABLED
 
@@ -99,11 +100,16 @@ void tud_cdc_rx_cb(uint8_t itf)
 
 //void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char);
 
+static void usb_unplugged_cb(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data){
+    ((USBCDC*)arg)->_onUnplugged();
+}
+
 USBCDC::USBCDC(uint8_t itfn) : itf(itfn), bit_rate(0), stop_bits(0), parity(0), data_bits(0), dtr(false),  rts(false), connected(false), reboot_enable(true), rx_queue(NULL) {
     tinyusb_enable_interface(USB_INTERFACE_CDC);
     tinyusb_enable_interface(USB_INTERFACE_DFU);
     if(itf < MAX_USB_CDC_DEVICES){
         devices[itf] = this;
+        arduino_usb_event_handler_register_with(ARDUINO_USB_EVENTS, ARDUINO_USB_STOPPED_EVENT, usb_unplugged_cb, this);
     }
 }
 
@@ -131,6 +137,16 @@ void USBCDC::end()
     tinyusb_persist_set_mode(REBOOT_NO_PERSIST);
 }
 
+void USBCDC::_onUnplugged(void){
+    if(connected){
+        connected = false;
+        dtr = false;
+        rts = false;
+        arduino_usb_cdc_event_data_t p = {0};
+        arduino_usb_event_post(ARDUINO_USB_CDC_EVENTS, ARDUINO_USB_CDC_DISCONNECTED_EVENT, &p, sizeof(arduino_usb_cdc_event_data_t), portMAX_DELAY);
+    }
+}
+
 void USBCDC::_onDFU(void){
     if(reboot_enable){
         tinyusb_persist_set_mode(REBOOT_BOOTLOADER_DFU);

libraries/USB/src/USBCDC.h

@@ -108,6 +108,7 @@ public:
     void _onLineState(bool _dtr, bool _rts);
     void _onLineCoding(uint32_t _bit_rate, uint8_t _stop_bits, uint8_t _parity, uint8_t _data_bits);
     void _onRX(void);
+    void _onUnplugged(void);
     
 protected:
     uint8_t  itf;