When closing and reopening the serial interface, it is no longer opened.

Operating System

Windows 10

IDE version

Arduino

Board

Raspbery Pi Pico

BSP version

Raspbery Pi Pico

TinyUSB Library version

latest

Sketch

OpenCloseSerial(bool open)
{
  //TinyUSBDevice.detach();
  digitalWrite(LED_BUILTIN, 1);
  delay(100);
  digitalWrite(LED_BUILTIN, 0);

  while (!usb_hid.ready());

  Serial.end();

  TinyUSBDevice.detach();
  delay(100);
  TinyUSBDevice.attach();

  if (open) Serial.begin(115200);
  usb_hid.begin();
  digitalWrite(LED_BUILTIN, buffer[0]);
}

What happened ?

I noticed that when closing the serial connection (Serial.End()) and then reopening it, it is no longer opened. Because I found errors in Adafruit_USBD_CDC.cpp, in the function "91: void Adafruit_USBD_CDC::end(void)" the variable "_instance" is not set to INVALID_INSTANCE; deferred, it remains when it is reopened. (line 74) set.

70:     void Adafruit_USBD_CDC::begin(uint32_t baud) {
71:     (void) baud;
72: 
73: // already called begin()
74:  if (isValid()) {
75:    returns;
76:  }
I changed the code so that the variable "_instance" is set to INVALID_INSTANCE, then it worked.
93:  void Adafruit_USBD_CDC::end(void) {
94:  // Reset configuration descriptor without Serial as CDC
95:  TinyUSBDevice.clearConfiguration();
96   _instance_count = 0;
97:  _instance = INVALID_INSTANCE;
98:   }

Thank you Erhard Kaserer

How to reproduce ?

Debug Log

No response

Screenshots