Q Light Controller+

Hello,
I have seen that you have added a spi plugin
That is fantastic i am currently developing a spi to dmx converter.
The first Prototype on the breadboard works great.

Have you any documentation about the spi protocol that you prefer use?

My prototype uses a serial eeprom like protocol, that allows to refresh a single channel without sending the data of all channels.

In a frew I will have a final pcb.
If you want it , I can send you a sample.

Hi Sven, well I can't say I'm a SPI expert.
I implemented the plugin to control LED strips with the WS2801 chip.
Since I'm not sure you can find the SPI interface on a PC, basically it is to be used with the Raspberry Pi for now.

I used just 3 signals: Data, clock and ground. That's it.
The Pi sends a train of bytes (each one is a DMX channel) up to the last LED I have to control.

If you have a PCB that makes possible to use it with a PC it would be fantastic ! (maybe USB ?)
Which use do you have in mind with the SPI protocol ?
I don't think QLC+ will use it as a generic output, but always to send DMX data

USB to spi is very simple.
The most ftdi chips supports spi mode.

My project is to generate a dmx signal with the spi port of a cubieboard 3.

Do you remember my older post about the Qdesk ?
I have already ordered 20 motorised slider, many buttons , small tft displays... all of this would be controlled over a spi port.
In a few days I can post the schematics here

One question
Do you need
a usb to WS2801 spi converter
or
a dmx to WS2801 spi converter
or
a Artnet to WS2801 spi converter

Hi Sven, sure I remember your Qdesk project !
Right now I can use the Raspberry SPI to control some home made LED bars.
I would be glad to have a USB-SPI adapter to speed up the tests from my PC.

But would you really build one for me ? That would be too much of a kindness

I have had a lot of success using the SPI plugin OLA on a raspberry pi, then using Arcnet to talk to that. Drives pixel strips brilliantly.

I've had success too on the Rpi, but without OLA
With the next version it will possible to use QLC+ even as an ArtNet to SPI converter

Hello Massimo, sorry for my late answer.

I am using the "Bus Pirate" to emulate a spi bus on my normal pc.

Link: http://dangerousprototypes.com/docs/Bus_Pirate

Br

Sven Meier

Artnet to spi is a great idea.

But I think a raspberry pi is oversized.

A small atxmega32a4 with a wiznet W5200 Ethernet chip is enough.

If some people have interest, I can put this on my todo list.

Something like this? https://github.com/bobo1on1/loc_controller/wiki