⦁ Removed `import time` (not used)
⦁ Removed unused/duplicate `_Device.config` argument `config_str`
⦁ Fixed the loop reserving other string indexes used by built-in drivers `while len(strs) < builtin_driver.str_max:` to `while len(strs) < builtin\_driver.str\_max - 1:` (row 169)because str_max equals to one more than the highest string descriptor index value used by any built-in descriptor according to the [docs](https://docs.micropython.org/en/latest/library/machine.USBDevice.html) and added a comment that this loop is probably unnecessary or even wrong
⦁ Added `bAlternateSetting` as argument to `Descriptor.interface`, because it is used for USB MIDI 2.0
⦁ Some code optimisations
To use this feature you need to create a usb device signaling remote wakeup
and then enable remote wakeup on the host (on linux write enabled to
/sys/bus/usb/devices/<device>/power/wakeup). Then you can wake up the host
when is on standby using USBDevice.remote_wakeup.
Signed-off-by: Felix Dörre <felix@dogcraft.de>
The USB pending transfer flag was cleared before calling the completion
callback, to allow the callback code to call submit_xfer() again.
Unfortunately this isn't safe in a multi-threaded environment, as another
thread may see the endpoint is available before the callback is done
executing and submit a new transfer.
Rather than adding extra locking, specifically treat the transfer as still
pending if checked from another thread while the callback is executing.
Closes#874
Signed-off-by: Angus Gratton <angus@redyak.com.au>
These packages build on top of machine.USBDevice() to provide high level
and flexible support for implementing USB devices in Python code.
Additional credits, as per included copyright notices:
- CDC support based on initial implementation by @hoihu with fixes by
@linted.
- MIDI support based on initial implementation by @paulhamsh.
- HID keypad example based on work by @turmoni.
- Everyone who tested and provided feedback on early versions of these
packages.
This work was funded through GitHub Sponsors.
Signed-off-by: Angus Gratton <angus@redyak.com.au>
HLammers