You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67 lines
1.7 KiB
67 lines
1.7 KiB
\section{NeoPixel Unit}
|
|
|
|
The NeoPixel unit implements the protocol needed to control a digital \gls{LED} strip with WS2812, WS2811, or compatible \gls{LED} driver chips. The protocol timing is implemented in software, therefore it is available on any GPIO pin of the module.
|
|
|
|
The color data can be loaded in five different format: as packed bytes, or as the little-endian or big-endian encoding of colors in the 32-bit format 0x00RRGGBB or 0x00BBGGRR. This data format is convenient when the colors are already represented by an array of 32-bit integers.
|
|
|
|
\subsection{NeoPixel Configuration}
|
|
|
|
\begin{inicode}
|
|
[NPX:neo@3]
|
|
# Data pin
|
|
pin=A0
|
|
# Number of pixels
|
|
pixels=32
|
|
\end{inicode}
|
|
|
|
\subsection{NeoPixel Commands}
|
|
|
|
\begin{cmdlist}
|
|
0 & \cname{CLEAR}
|
|
Switch all \glspl{LED} off (sets them to black) & \\
|
|
|
|
1 & \cname{LOAD}
|
|
Load a sequence of R,G,B bytes
|
|
& \begin{cmdreq}
|
|
\item For each LED:
|
|
\begin{pldlist}
|
|
\cfield{u8} red
|
|
\cfield{u8} green
|
|
\cfield{u8} blue
|
|
\end{pldlist}
|
|
\end{cmdreq} \\
|
|
|
|
4 & \cname{LOAD\_U32\_ZRGB}
|
|
Load 32-bit big-endian 0xRRGGBB (0,R,G,B)
|
|
& \begin{cmdreq}
|
|
\cfield{u32[]} color data BE
|
|
\end{cmdreq} \\
|
|
|
|
5 & \cname{LOAD\_U32\_ZBGR}
|
|
Load 32-bit big-endian 0xBBGGRR (0,B,G,R)
|
|
& \begin{cmdreq}
|
|
\cfield{u32[]} color data BE
|
|
\end{cmdreq} \\
|
|
|
|
6 & \cname{LOAD\_U32\_RGBZ}
|
|
Load 32-bit little-endian 0xBBGGRR (R,G,B,0)
|
|
& \begin{cmdreq}
|
|
\cfield{u32[]} color data LE
|
|
\end{cmdreq} \\
|
|
|
|
7 & \cname{LOAD\_U32\_BGRZ}
|
|
Load 32-bit little-endian 0xRRGGBB (B,G,R,0)
|
|
& \begin{cmdreq}
|
|
\cfield{u32[]} color data LE
|
|
\end{cmdreq} \\
|
|
|
|
10 & \cname{GET\_LEN}
|
|
Get number of \glspl{LED} in the strip
|
|
& \begin{cmdresp}
|
|
\cfield{u16} number of \glspl{LED}
|
|
\end{cmdresp} \\
|
|
|
|
\end{cmdlist}
|
|
|
|
|
|
|
|
|