There are a lot of PS/2 commands, some are vendor/device specific, so we
provide a weak ps2_mouse_init_user() to be implemented in each keyboard
that need it.
There are now 3 potential locations to send HID reports:
1. USB
2. The bluefruit easy key
3. Adafruit BLE
Generally speaking, if USB is connected then we should prefer to
send the reports there; it is generally the best channel for this.
The bluefruit module has no feedback about bluetooth connectivity
so the code must speculatively send reports over both USB and bluetooth.
The BLE module has connectivity feedback. In general we want to
prefer to send HID reports over USB while connected there, even
if BLE is connected. Except that it is convenient to force them
over BLE while testing the implementation.
This policy has been extracted out into a where_to_send function
which returns a bitmask of which of the channels should be used.
This implements some helper functions that allow sending key reports
to an SPI based Bluetooth Low Energy module, such as the Adafruit
Feather 32u4 Bluefruit LE.
There is some plumbing required in lufa.c to enable this; that
is in a follow-on commit.
Adopt the macros for saving/restoring the interrupt state
that are provided by the avr gcc environment.
Removing intialization of the timer value; this shaves off
a few bytes because globals are default initialized to zero.
User print disables the normal print messages in the body of QMK/TMK
code and is meant as a lightweight alternative to NOPRINT. Use it when
you only want to do a spot of debugging but lack flash resources for
allowing all of the codebase to print (and store their wasteful
strings).
Wilba6582