FirmwareMSC.ino

#ifndef ARDUINO_USB_MODE
#error This ESP32 SoC has no Native USB interface
#elif ARDUINO_USB_MODE == 1
#warning This sketch should be used when USB is in OTG mode
void setup() {}
void loop() {}
#else
#include "USB.h"
#include "FirmwareMSC.h"

#if !ARDUINO_USB_MSC_ON_BOOT
FirmwareMSC MSC_Update;
#endif

static void usbEventCallback(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data) {
  if (event_base == ARDUINO_USB_EVENTS) {
    arduino_usb_event_data_t *data = (arduino_usb_event_data_t *)event_data;
    switch (event_id) {
      case ARDUINO_USB_STARTED_EVENT: Serial.println("USB PLUGGED"); break;
      case ARDUINO_USB_STOPPED_EVENT: Serial.println("USB UNPLUGGED"); break;
      case ARDUINO_USB_SUSPEND_EVENT: Serial.printf("USB SUSPENDED: remote_wakeup_en: %u\n", data->suspend.remote_wakeup_en); break;
      case ARDUINO_USB_RESUME_EVENT:  Serial.println("USB RESUMED"); break;

      default: break;
    }
  } else if (event_base == ARDUINO_FIRMWARE_MSC_EVENTS) {
    arduino_firmware_msc_event_data_t *data = (arduino_firmware_msc_event_data_t *)event_data;
    switch (event_id) {
      case ARDUINO_FIRMWARE_MSC_START_EVENT: Serial.println("MSC Update Start"); break;
      case ARDUINO_FIRMWARE_MSC_WRITE_EVENT:
        //Serial.printf("MSC Update Write %u bytes at offset %u\n", data->write.size, data->write.offset);
        Serial.print(".");
        break;
      case ARDUINO_FIRMWARE_MSC_END_EVENT:   Serial.printf("\nMSC Update End: %u bytes\n", data->end.size); break;
      case ARDUINO_FIRMWARE_MSC_ERROR_EVENT: Serial.printf("MSC Update ERROR! Progress: %u bytes\n", data->error.size); break;
      case ARDUINO_FIRMWARE_MSC_POWER_EVENT:
        Serial.printf("MSC Update Power: power: %u, start: %u, eject: %u", data->power.power_condition, data->power.start, data->power.load_eject);
        break;

      default: break;
    }
  }
}

void setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true);

  USB.onEvent(usbEventCallback);
  MSC_Update.onEvent(usbEventCallback);
  MSC_Update.begin();
  USB.begin();
}

void loop() {
  // put your main code here, to run repeatedly
}
#endif /* ARDUINO_USB_MODE */