jaseg/matelight
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

README.md: What CRC again?

Browse source
This commit is contained in:
jaseg 2015-01-05 00:42:13 +01:00
parent b58a666433
commit f1c15cc234
1 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
README.rst
View file

@ -3,7 +3,7 @@ Mate Light
.. image:: http://cbag3.c-base.org/media/cache/artefact_show/uploads/assets/52f6c9c16c72d.jpeg
Transform a bunch of empty mate crates to a huge display using a 14 year old laptop, a 13US$ microcontroller board and a couple of cheap chinese christmas lights.
Transform a bunch of empty mate crates to a huge display using a 15 year old laptop, a 13US$ microcontroller board and a couple of cheap chinese christmas lights.
Hardware Setup
--------------
@ -26,7 +26,7 @@ The control software is a Python script accepting framebuffer data via UDP and t
Architecture
~~~~~~~~~~~~
The server listens on TCP and UDP ports 1337. Any text arriving through TCP is rendered as a marquee, interpreting ANSI escape sequences (colors, blink etc.). The UDP port accepts CRAP, our Custom advanced video stReAming Protocol. A CRAP packet contains three bytes of RGB data per pixel in 16 rows of 40 columns (i.e. ``[R0,0 G0,0 B0,0 R0,1 G0,1 B0,1 ... R0,39 G0,39 B0,39 R1,0 G1,0 B1,0 ... R15,39 G15,39 B15,39]``) and an optional trailing CRC32 checksum.
The server listens on TCP and UDP ports 1337. Any text arriving through TCP is rendered as a marquee, interpreting ANSI escape sequences (colors, blink etc.). The UDP port accepts CRAP, our Custom advanced video stReAming Protocol. A CRAP packet contains three bytes of RGB data per pixel in 16 rows of 40 columns (i.e. ``[R0,0 G0,0 B0,0 R0,1 G0,1 B0,1 ... R0,39 G0,39 B0,39 R1,0 G1,0 B1,0 ... R15,39 G15,39 B15,39]``).
There is at least one further server implementation of CRAP in the form of an `HTML5 CRAP emulator`_. There is `a Python script that plays gifs over CRAP`_.