Can Espruino handle timing of WS2811 - YES

[espruino-discuss3]

Posted at 2024-08-17 by @MaBecker

Data sheets for ws2812 and ws2811 show different timings for 1 and 0. Did anyone tested ws2811?

[espruino-discuss3]

Posted at 2024-08-18 by @MaBecker

Timing from datasheets WS2812.pdf, WS2811.pdf

Signal     WS2812-800KHz    WS2811-400KHz    WS2811-800KHz

T0H_NS      350              500              250
T0L_NS      800              2000             1000

T1H_NS      700              1200             600
T1L_NS      600              1300             650             

Tolerance is +-150ns

Coded in Espruino:

Signal     ESP32

T0H_NS      350       
T0L_NS      900 

T1H_NS      900   
T1L_NS      350 

Now testing some WS2812 and WS2811 with this setting:

Signal     ESP32

T0H_NS      350       
T0L_NS      900 

T1H_NS      700   
T1L_NS      600 

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Posted at 2024-08-19 by @MaBecker

@gfwilliams What do you thing about having a optional timing setting like this:

np = require("neopixel").config(t0h : 350, tol : 900, t1h : 700, t1l : 600);

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Posted at 2024-08-27 by @gfwilliams

Have you tested? At the time I used 2811/2812/others and all seemed pretty reliable. The thing that made the flicker was more if there was glitching on the data line when it was first initialised.

Maybe it could be configurable but if that kind of thing were added I'd like to do it so it worked on multiple platforms, and that could be a bit too difficult

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Posted at 2024-12-29 by @MaBecker

Did some further testing and can confirm that no changes for timing is needed.