I've just managed to make it work so I will give some feedback for those
who would like to do the same.
- Start with a fresh Angstrom kernel.
- Disable HDMI :
- Plug in the mini-usb cable from your board to your computer, open
the Beaglebone partition and the uEnv.txt inside it.
- Add this to the file :
capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
- Boot the board. Run : *cat /sys/devices/bone_capemgr.*/slots*. You
should see the two lines concerning the HDMI with P-O-- flags. There's no L
in this so it means it is disabled.
- Follow the instructions to enable SPI :
http://hipstercircuits.com/enable-spi-with-device-tree-on-beaglebone-black-copy-paste/
. You don't need to try the bus yet, just make sure to download the python
libraries he mentioned.
- You have rebooted your board, if you run *cat
/sys/devices/bone_capemgr.*/slots *you should see a line with BB-SPI1-01.
- Download this to your BB : https://github.com/doceme/py-spidev
- Run *python setup.py install*
- In this repository :
https://github.com/hackerspaceshop/RaspberryPI_WS2801_Bridge/tree/master/software.
Download the
LedStrip_WS2801.py<https://github.com/hackerspaceshop/RaspberryPI_WS2801_Bridge/blob/master/software/LedStrip_WS2801.py>file
to your BB. You can use the demo.py to have an idea of what you can do
with the library.
- HW time : make sure your led strand is correctly powered
(http://learn.adafruit.com/adalight-diy-ambient-tv-lighting/wiring-1 if you
need help). Wire the led strand input to your BB : GND goes to pin 1 of P9,
CO to pin 31 of P9, DO to pin 30 of P9.
- Finally run *python demo.py*
Enjoy ! If it helped you, just let me know ; )
Le dimanche 20 octobre 2013 14:59:55 UTC+2, [email protected] a écrit :
>
> Hello guys !
>
> I'm looking for a way to use a strip of 50 WS2801 leds with my beaglebone
> black. All the documents I've found are related to Arduino or Raspberry so
> I have some issues to know the path I should follow.
>
> I have this driver : http://elinux.org/BeaconBoard so currently I'm
> trying to rebuild an Angstrom kernel with this.
>
> If anyone has already done it or have any advice I'm eager to hear it !
>
> Thanks !
>
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