Details
-
Bug
-
Resolution: Unresolved
-
P2: Important
-
None
-
5.11.3
-
None
-
Chromebook, Debian 10 (buster)
Connected USB-serial device: Adafruit Feather Sense https://learn.adafruit.com/adafruit-feather-sense
-
Linux/X11
Description
This is a bug reported by a user of Mu Editor, who experience that the editor wouldn't recognize a USB device.
We've discovered that QSerialPortInfo::availablePorts() in this case doesn't return the right vendor ID (VID) and product ID (PID) for his device, but instead returns 0x0 for both VID and PID.
The original issue is over here on our bug tracker https://github.com/mu-editor/mu/issues/1270, but I will just describe the details here as well.
The expected output is VID:PID=239a:8088, which has been confirmed through `lsusb`:
~$ lsusb Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 017: ID 239a:8088 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Here's a Qt program that queries and prints VID:PID's for all serial devices:
#include <QDebug> #include <QtSerialPort/QSerialPortInfo> int main() { qDebug() << "Qt version: " << QT_VERSION_STR; Q_FOREACH(QSerialPortInfo port, QSerialPortInfo::availablePorts()) { QString vid = "0x" + QString::number(port.vendorIdentifier(), 16); QString pid = "0x" + QString::number(port.productIdentifier(), 16); QString line = QString("%1 VID:PID=%2:%3 (%4)").arg(port.portName(), vid, pid, port.manufacturer()); qDebug() << qPrintable(line); } }
Which just prints the following when executed:
~$ ./mu_issue1270 Qt version: 5.11.3 ttyACM0 VID:PID=0x0:0x0 ()
We're using Python to develop Mu, and the other Python library for interacting with serial devices, pySerial, doesn't have this issue:
~$ python3 -m serial.tools.list_ports -v /dev/ttyACM0 desc: Feather Bluefruit Sense - CircuitPython CDC control hwid: USB VID:PID=239A:8088 SER=5F7F72B6AB5B3CDC LOCATION=1-1:1.0 1 ports found
