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Here I will gather all info I can find out about the different force effects and
their USB commands. All values seem to be little-endian.
Also, general note, it seems like some effects are affected by the direction of
the force, denoted by ***
As far as I can tell, fade_level and attack_level values are calculated by
mapping the u16 into s16 and taking the absolute value, and after that
multiplying by the direction.
All values are examples of actual commands that I captured on the USB interface,
not the only ones available.
GENERAL:
Playing:
60 00 - standard header
01 - ID
89 - playing options
01 - play
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Stopping/removing: (why are they rolled into one?)
60 00 - standard header
01 - ID
89 - playing options
00 - stop
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF_CONSTANT:
Initialization:
60 00 - standard header
01 - ID
6a - new constant effect(?)
fe ff - strength ***
00 00 - attack_length
00 00 - attack_level ***
00 00 - fade_length
00 00 - fade_level ***
00 4f - ?
f7 17 - time in milliseconds, unsigned
00 00
07 00 - offset from start(?)
00 ff ff - end of new effect(?)
00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Modifying: (It may be possible to modify the effects all at once, not sure)
(In any case, so far I only investigated the constant modifiers)
Direction: n/a
Constant force:
60 00 - standard header
01 - ID
0a - modify constant force
05 16 - constant force
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Envelope:
60 00 - standard header
01 - ID
31 - modify envelope
84 - ID of envelope attribute ( attack_level 82,
attack_length 81,
fade_level 88,
fade_length 84 )
63 04 - value attribute should be set to
00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Duration:
60 00 - standard header
01 - ID
49 00 41 - modify timing?
6c 20 - length in milliseconds
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF_RAMP:
(Why on earth is it this difficult to figure out how a fucking ramp works?)
Init:
60 00 - standard header
01 - ID
6b - new ramp effect
f6 7f - difference ***
fe ff - level? *** (level = (if end_level > start_level, end_level, else
start_level) - difference?) (signed)
00 00
f7 17 - time
00 80 - some kind of marker
00 00 - attack_length
f6 7f - attack_level ***
00 00 - fade_length
f6 7f - fade_level***
04 - invert (going "down", 05, going "up", 04)
4f
f7 17 - time again?
00 00
00 00 - offset
00 ff ff - end of init
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF_SPRING:
Init:
60 00 - standard header
01 - ID
64 - new conditional effect
fc 7f - positive coefficient (right?)
fc 7f - negative coefficient (left?)
fe ff - deadband (left?) (deadband + offset) (fe ff means no deadband)
fe ff - deadband (right?) (deadband + offset)
a6 6a a6 6a fe ff fe ff fe ff fe ff df 58 a6 6a 06 - some weird hard-coded
values to do with springs?
4f
f7 17 - duration
00 00
00 00 - offset
00 ff ff - end of init
00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF_DAMPER + FF_FRICTION + FF_INERTIA:
Init:
60 00 - standard header
02 -ID
64 - new conditional effect
fc 7f - positive coefficient (right?)
fc 7f - negative coefficient (left?)
fe ff - deadband (left?) (deadband + offset) (fe ff means no deadband)
fe ff - deadband (right?) (deadband + offset)
fc 7f fc 7f fe ff fe ff fe ff fe ff fc 7f fc 7f 07 - some weird hard-coded
values to do with friction?
4f
f7 17 - duration
00 00
00 00 - offset
00 ff ff - end of init
00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF_PERIODIC:
60 00 - standard header
01 - ID
6b - new periodic effect
00 00 - magnitude ***
fe ff - phase (left/right)
00 00 - offset of effect (forward/backward)
e8 03 - period
00 80
00 00 - attack_length
00 00 - attack_level ***
00 00 - fade_length
00 00 - fade_level ***
01 - type of periodic ( square 01,
sine 03,
triangle 02,
sawtooth down 05,
sawtooth up 04 )
4f
f7 17 - duration
00 00
00 00 - offset
00 ff ff - end of init
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF_AUTOCENTER:
60 08 - header plus settings?
03 - set autocenter force
8f 02 - force (between ff ff and 00 00)
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
FF_GAIN:
60 02 - header plus gain?
bf - gain (between ff and 00)
00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Rotation angle:
60 08 - header plus settings?
11 - set rotation angle
55 d5 - angle (between ff ff and 7b 09, one degree is roughly 3c)
00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Open:
60 01 - standard header?
04 - ?
00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
(this command doesn't appear every time, odd)
60 12 - ?
bf 04 00 00 03 b7 1e - ?
00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 01 - ?
05 - ?
00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Close:
60 01 - standard header?
00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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