Make the function configuration_desc pure virtual inside USBDevice.
This should be a compile time error since no subclass will work
without a configuration descriptor.
Add a destructor to USBDevice to ensure that resources have been
properly released. Additionally add an assert in the destructor that
deinit has already been called. If it has not been called then
interrupts can still occur which may cause a crash.
Remove the option to block in USBDevice::connect since this
should be handled at a higher level. Also call init to ensure that
the USBDevice has been initalized.
Add the helper function endpoint_remove_all which removes all added
endpoints. This is useful for class drivers switching between
different USB configurations.
Perform processing triggered by user callbacks when USB is being
unlocked rather than synchronously. This prevents recursive callbacks
which reduces stack usage. This also prevents state change inside
the user callback which makes the code easier to reason about.
Remove the USBDevice function read_start and automatically start all
reads internally in USBDevice. This patch also renames the function
read_finish to read.
Russ Butler
Russ Butler
Maciej Bocianski