Function usbEventCallback

ESP32_AP-Flasher/src/usbflasher.cpp:236–298

#ifdef HAS_USB
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");
                resetFlasherState();
                break;
            case ARDUINO_USB_STOPPED_EVENT:
                Serial.println("USB UNPLUGGED");
                resetFlasherState();
                break;
            case ARDUINO_USB_SUSPEND_EVENT:
                Serial.printf("USB SUSPENDED: remote_wakeup_en: %u\r\n", data->suspend.remote_wakeup_en);
                break;
            case ARDUINO_USB_RESUME_EVENT:
                Serial.println("USB RESUMED");
                break;
            default:
                ets_printf("other USB event %d\n", event_id);
                break;
        }
    } else if (event_base == ARDUINO_USB_CDC_EVENTS) {
        arduino_usb_cdc_event_data_t* data = (arduino_usb_cdc_event_data_t*)event_data;
        switch (event_id) {
            case ARDUINO_USB_CDC_CONNECTED_EVENT:
                ets_printf("CDC CONNECTED\n");
                resetFlasherState();
                usbConnectedStartTime = millis();
                break;
            case ARDUINO_USB_CDC_DISCONNECTED_EVENT:
                ets_printf("CDC DISCONNECTED\n");
                resetFlasherState();
                break;
            case ARDUINO_USB_CDC_LINE_STATE_EVENT:
                ets_printf("CDC LINE STATE: dtr: %u, rts: %u\n", data->line_state.dtr, data->line_state.rts);
                if (data->line_state.dtr == 0) resetFlasherState();
                break;
            case ARDUINO_USB_CDC_LINE_CODING_EVENT:
                ets_printf("CDC LINE CODING: bit_rate: %u, data_bits: %u, stop_bits: %u, parity: %u\n", data->line_coding.bit_rate, data->line_coding.data_bits, data->line_coding.stop_bits, data->line_coding.parity);
                resetFlasherState();
                break;
            case ARDUINO_USB_CDC_RX_EVENT:
                // Serial.printf("CDC RX [%u]:", data->rx.len);
                {
                    uint8_t buf[data->rx.len];
                    size_t len = cmdSerial.read(buf, data->rx.len);
                    if (serialPassthroughState) {
                        Serial2.write(buf, len);
                    } else {
                        flasherDataHandler(buf, len, TRANSPORT_USB);
                    }
                }
                break;
            case ARDUINO_USB_CDC_RX_OVERFLOW_EVENT:
                Serial.printf("CDC RX Overflow of %d bytes", data->rx_overflow.dropped_bytes);
                break;