DETAILS: RCJOY AXES/BUTTONS, RADIO CHANNELS AND THEIR USAGES

This release (2.0.0) uses only one endpoint (EP1IN) to send data about the
axes of the two stick of the radio, plus 8 additional channels mapped as buttons
(threshold triggered). It uses 14 bits to code the position of each axis plus
one bit for each button, so one endpoint is enough for 4 axes and 8 buttons
(8B see NOTES on USB below). The result is an HID joystick with axes X (aileron),
Y (elevator), Throttle and Rudder plus 8 buttons. Computerized radios usually
assign a specific usage to each channel; I know two main standard:
Futaba/Hitec assignment: ch1: aileron, ch2: elevator, ch3: throttle, ch4: rudder,
JR/Graupner	assignment: ch1: throttle, ch2: aileron, ch3: elevator, ch4: rudder.
The usages on the radio should meet the joystick usages, so this firmware provide
two possible assignments for the two types of radios, selectable by placing a
jumper on the ICSP connector socket	between pins 3-4 (JR/Graupner) or pins 4-5
(Futaba/Hitec). The resulting assignments are:

JR/Graupner (jumper on pins 3-4 of ICSP connector socket):
	ch1:     throttle
	ch2:     X axis (aileron)
	ch3:     Y axis (elevator)
	ch4:     rudder
	ch5..12: button 1..8

Futaba/Hitec (jumper on pins 4-5 of ICSP connector socket):
	ch1:     X axis (aileron)
	ch2:     Y axis (elevator)
	ch3:     throttle
	ch4:     rudder
	ch5..12: button 1..8

Some channel could need to be reversed in your radio settings.

Hoping your radio meets	these channel assignments and your simulation software
also meets the resulting rcjoy axes usages (or can be configured to), you should
also be able to simply select on your trasmitter the stick arrangement you are
used to (mode 1, mode 2, mode 3	or mode 4). As an example in Realflight G2 those
rcjoy axes usages are well met if inside realflight we select this joystick with
mode 2; but after that we can still select the preferred mode among the four by
setting it in our radio trasmitter (if the radio can do that, obviously). In FMS
every joystick axis is easily reassignable to the specific simulator usage so
should be easy to find the correct setup: it's enough to remember that rcjoy
usages are 1: X axis (aileron or roll), 2: Y axis (elevator or nick), 3: throttle
or pitch, 4: rudder or tail rotor; set these numbers inside FMS controller settings,
set the rcjoy assignment jumper according to your radio (Futaba or JR type), choose
the stick arrangement mode you prefer in your radio and that should be all.

On my Graupner MC12 I use the AC (Acrobatic-Nautic-Car) model type, not the
Unifly,	because the Unifly use a software mixing between ch2 and ch5 that
activate first button when moving aileron. Moreover I have to reverse all the
4 main channels on my radio to see the expected rcjoy response.