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Forum Index : Electronics : WS2812 BGR possible instead of RGB?

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wolfme
Newbie

Joined: 26/10/2021
Location: Germany
Posts: 31

Posted: 08:42pm 17 Jan 2025

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Is it possible to drive BGR WS2812 LEDs?

SetPin GP16, DOUT
WS2812 B, GP16, 1, RGB(red)

lights up the LED green and

SetPin GP16, DOUT
WS2812 B, GP16, 1, RGB(green)

lights up the LED red

phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 2374

Posted: 10:56pm 17 Jan 2025

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@Mixtel90 also found some with wrong colours.https://www.thebackshed.com/forum/ViewTopic.php?TID=17173&PID=225831#225831#225831 Though he didn't show his solution it would just require transposing the colours. See if this works

OriginalColour = RGB(red,green,blue)
TransposedColour =((OriginalColour >> 8)And &HFF00)+((OriginalColour<<8)And &HFF0000)+((OriginalColour)And &HFF)
WS2812 B, GP16, 1, TransposedColour

wolfme
Newbie

Joined: 26/10/2021
Location: Germany
Posts: 31

Posted: 06:27am 18 Jan 2025

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phil99 said @Mixtel90 also found some with wrong colours.https://www.thebackshed.com/forum/ViewTopic.php?TID=17173&PID=225831#225831#225831 Though he didn't show his solution it would just require transposing the colours. See if this works

OriginalColour = RGB(red,green,blue)
TransposedColour =((OriginalColour >> 8)And &HFF00)+((OriginalColour<<8)And &HFF0000)+((OriginalColour)And &HFF)
WS2812 B, GP16, 1, TransposedColour

That works, thanks very much!

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