Control LED brightness

[ni-jbreme]

I'd like to MIDI control the brightness of single color & RGB LED (e.g. 25%, 50%, 75% and 100%). This would be super useful to program button states, e.g. off / disabled / enabled / active.

BTW. Thanks a lot for starting this great project!

[paradajz]

I am thinking about the best way to implement this while staying compatible with the current system:

https://github.com/paradajz/OpenDeck/wiki/LED-control

What I had in mind was:

1) For separate state/blink messages the current values are:

Velocity/control value/program range	Color
0-15	Off
16-31	Red
32-47	Green
48-63	Yellow
64-79	Blue
80-95	Magenta
96-111	Cyan
112-127	White

In order to implement brightness control, I could simply scale the defined range for specific color to brightness, ie. for red, the values would be something like this:

Value	Brightness
16-20	50%
21-25	75%
26-31	100%

Fits into existing model quite well.

2) Combined state and blinking:

Velocity/control value	Color	Blink speed
0-15	Off	No blinking
16	Red	100ms
17	Red	200ms
18	Red	300ms
19	Red	400ms
20	Red	500ms
21	Red	600ms
22	Red	700ms
23	Red	800ms
24	Red	900ms
25	Red	1000ms
26-31	Red	No blinking
32	Green	100ms
33	Green	200ms
34	Green	300ms
35	Green	400ms
36	Green	500ms
37	Green	600ms
38	Green	700ms
39	Green	800ms
40	Green	900ms
41	Green	1000ms
42-47	Green	No blinking
48	Yellow	100ms
49	Yellow	200ms
50	Yellow	300ms
51	Yellow	400ms
52	Yellow	500ms
53	Yellow	600ms
54	Yellow	700ms
55	Yellow	800ms
56	Yellow	900ms
57	Yellow	1000ms
58-63	Yellow	No blinking
64	Blue	100ms
65	Blue	200ms
66	Blue	300ms
67	Blue	400ms
68	Blue	500ms
69	Blue	600ms
70	Blue	700ms
71	Blue	800ms
72	Blue	900ms
73	Blue	1000ms
74-79	Blue	No blinking
80	Magenta	100ms
81	Magenta	200ms
82	Magenta	300ms
83	Magenta	400ms
84	Magenta	500ms
85	Magenta	600ms
86	Magenta	700ms
87	Magenta	800ms
88	Magenta	900ms
89	Magenta	1000ms
90-95	Magenta	No blinking
96	Cyan	100ms
97	Cyan	200ms
98	Cyan	300ms
99	Cyan	400ms
100	Cyan	500ms
101	Cyan	600ms
102	Cyan	700ms
103	Cyan	800ms
104	Cyan	900ms
105	Cyan	1000ms
106-111	Cyan	No blinking
112	White	100ms
113	White	200ms
114	White	300ms
115	White	400ms
116	White	500ms
117	White	600ms
118	White	700ms
119	White	800ms
120	White	900ms
121	White	1000ms
122-127	White	No blinking

In this case I would have to use another message for brightness, which gets kinda confusing, so you either have:

1) State/Color with brightness message + blink message or 2) State/Color/Blink message + brightness message

Not sure how to deal with this.

[ni-jbreme]

Hi @paradajz ,

Thanks for your reply!

Your proposed solution would totally work for me (if 25% would be an option as well ;) ). Not offering brightness support when blinking seems a valid option. Another solution I could imagine would be offering brightness information as optional via MIDI channel 2. If no information is send, the brightness would stay at 100%, just as it is today.

Thanks and all the best,

Jonas

[paradajz]

The thing is, you can configure MIDI channel for each LED individually, so hardcoding brightness against MIDI channel 2 wouldn't really work. I'll think some more about this.

[paradajz]

Will start implementing this soon, however it will not be available on the current OpenDeck board - only on the next one (v2). I've also decided not to implement brightness control while the LED is blinking.

[ni-jbreme]

Cool, thanks for letting me know. Looking forward!

Best, Jonas

On Wed, Jun 3, 2020 at 11:49 PM paradajz notifications@github.com wrote:

Will start implementing this soon, however it will not be available on the current OpenDeck board - only on the next one (v2). I've also decided not to implement brightness control while the LED is blinking.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/paradajz/OpenDeck/issues/21#issuecomment-638479955, or unsubscribe https://github.com/notifications/unsubscribe-auth/AONCR33SWX4OJKCDUQQEC2LRU3AQDANCNFSM4KNFEACA .

-- Jonas Breme UX Designer Native Instruments GmbH +49-30-611035-1928

www.native-instruments.com

[paradajz]

With the v5.1.0 release, I've added initial infrastructure for handling LED brightness, although the actual brightness control still isn't implemented. Hoping to get it done in next release. I've also completely reworked control values, so you can check the new control table here (spoiler alert: brightness control will be possible in combination with blinking, after all!):

https://github.com/paradajz/OpenDeck/wiki/LED-control

[paradajz]

Finally working on this for real. Will be part of next release. Software PWM method will be used so that brightness control is possible on any board and any pin (be it through shift register, native output or in matrix).

[paradajz]

Resolved with https://github.com/paradajz/OpenDeck/commit/0c98723ceb36c5a99ae9f943d4ca2e3f0a741373