The arguments passed to `Callback<void()>`'s constructor were the wrong way round,
thus preventing the `attach` function from being instantiated.
This patch corrects that by switching the order of the arguments.
Attach callbacks with the assignment operator rather than with the
deprecated attach function. This fixes deprecation warnings.
This patch also adds the ability to attach a Callback directly.
The local static initialization in USB was causing multiple problems:
-Configurable descriptor values are set only once
-USB descriptor initialization causes a trap in debug builds since
this is acquiring a mutex in an interrupt handler
-Extra ram used since all descriptors are in RAM
This patch fixes these problems by making fixed descriptors
static const so they are stored in flash and never need to be
initialized and by making descriptors that do change a member
of the class so they are always initialized when requested
rather than once though lazy static local initialization.
1. added call to busReset() to KL25Z HAL; now the USB stack survives if you disconnect the cable, similar to LPC40 2. busReset callback to update terminal_connected in USBCDC 3. new bool USBSerial::connected() to read protected terminal_connected property, useful when you want to check if the terminal is ready from main app
Pharap
Joris Aerts
Russ Butler
Anna Bridge
Michel Jaouen
Christopher Haster