tinyusb: USBTMC example not working on SAMD21/SAMD51

Setup Setup 1: PC OS: Windows 10 Board: Seeeduino Xiao (samd21), Firmware: examples/device/usbtmc

Setup 2: PC OS: Raspberry Pi OS (using pyvisa 1.11.1, pyvisa-py 0.4.1) Board: Seeeduino Xiao (samd21), Firmware: examples/device/usbtmc

Describe the bug On Windows 10 pyvisa (using NI VISA backend) will not report the device. On Raspberry Pi pyvisa reports the device, but the resource manager is unable to connect.

To reproduce Steps to reproduce the behavior:

1. Compiled the USBTMC example on raspberry pi and downloaded it to the Seeeduino Xiao (samd21) using uf2 drag-n-drop.
2. Cycled power on the device after 5 seconds
3. Used the following python script to list USBTMC devices:

import pyvisa
rm = pyvisa.ResourceManager('@py')
print(rm.list_resources())
samd21 = rm.open_resource('USB0::51966::16384::123456::0::INSTR')

(‘ASRL/dev/ttyAMA0::INSTR’, ‘USB0::51966::16384::123456::0::INSTR’) Traceback (most recent call last): File “/home/pi/.local/lib/python3.7/site-packages/pyvisa_py/protocols/usbtmc.py”, line 216, in init self.usb_dev.set_configuration() File “/home/pi/.local/lib/python3.7/site-packages/usb/core.py”, line 869, in set_configuration self._ctx.managed_set_configuration(self, configuration) File “/home/pi/.local/lib/python3.7/site-packages/usb/core.py”, line 102, in wrapper return f(self, *args, **kwargs) File “/home/pi/.local/lib/python3.7/site-packages/usb/core.py”, line 148, in managed_set_configuration self.backend.set_configuration(self.handle, cfg.bConfigurationValue) File “/home/pi/.local/lib/python3.7/site-packages/usb/backend/libusb1.py”, line 794, in set_configuration _check(self.lib.libusb_set_configuration(dev_handle.handle, config_value)) File “/home/pi/.local/lib/python3.7/site-packages/usb/backend/libusb1.py”, line 595, in _check raise USBError(_strerror(ret), ret, _libusb_errno[ret]) usb.core.USBError: [Errno None] Other error

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File “test_tinyusb.py”, line 4, in <module> samd21 = rm.open_resource(‘USB0::51966::16384::123456::0::INSTR’) File “/home/pi/.local/lib/python3.7/site-packages/pyvisa/highlevel.py”, line 3304, in open_resource res.open(access_mode, open_timeout) File “/home/pi/.local/lib/python3.7/site-packages/pyvisa/resources/resource.py”, line 298, in open self._resource_name, access_mode, open_timeout File “/home/pi/.local/lib/python3.7/site-packages/pyvisa/highlevel.py”, line 3232, in open_bare_resource return self.visalib.open(self.session, resource_name, access_mode, open_timeout) File “/home/pi/.local/lib/python3.7/site-packages/pyvisa_py/highlevel.py”, line 167, in open sess = cls(session, resource_name, parsed, open_timeout) File “/home/pi/.local/lib/python3.7/site-packages/pyvisa_py/sessions.py”, line 323, in init self.after_parsing() File “/home/pi/.local/lib/python3.7/site-packages/pyvisa_py/usb.py”, line 84, in after_parsing self.parsed.serial_number, File “/home/pi/.local/lib/python3.7/site-packages/pyvisa_py/protocols/usbtmc.py”, line 287, in init super(USBTMC, self).init(vendor, product, serial_number, **kwargs) File “/home/pi/.local/lib/python3.7/site-packages/pyvisa_py/protocols/usbtmc.py”, line 218, in init raise Exception(“failed to set configuration\n %s” % e) Exception: failed to set configuration [Errno None] Other error

Screenshots

Log Working to get log file. Have not been successful yet.