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WS2812 bảng dữ liệu(PDF) 81 Page - Raspberry Pi Holdings PLC

tên linh kiện WS2812
Giải thích chi tiết về linh kiện  Created by Phillip Burgess
PDF  98 Pages
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nhà sản xuất  RASPBERRY-PI [Raspberry Pi Holdings PLC]
Trang chủ  https://www.raspberrypi.com/
Logo RASPBERRY-PI - Raspberry Pi Holdings PLC

WS2812 bảng dữ liệu(HTML) 81 Page - Raspberry Pi Holdings PLC

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Writing Your Own Library
The WS2812 datasheet (https://adafru.it/cDB) explains the data transmission protocol. This is a
self-clocking signal —
there’s only one wire, not separate data and clock lines. “1” and “0” bits are indicated by varying the duty cycle of a
fixed-frequency square wave.
There’s a math goof in the datasheet’s timing values. Use these figures instead:
Note that there’s nearly 25% “wiggle room” in the timing. So if your code can’t match the recommended times exactly,
it’s usually okay, as long as it’s close.
There are three bytes of data for each pixel. These should be issued in green, red, blue order, with the most-significant
© Adafruit Industries
https://learn.adafruit.com/adafruit-neopixel-uberguide
Page 84 of 101



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