Problem with the Prop Blade and DMX

JasonLights · 2009-02-20 04:32

I am using the ENTTEC DMX Pro with the Prop Blade and the "Prop Blade DMX-512 Demo Ver 01.0" gotton from http://brilldea.com/product_PropBlade.html

The only changes made to the program it the G1 side was turned on and added debug into the main loop.

The main problem i see with the code it that the DMX.level(0) returns a 2-246
this check that the data in the buffer is "dimmer" data and not RDM or other (part of the protocol)

CODE said...
repeat

'BS2.Debug_Str(string("Spin-Up World!",13))

'Check the address, if it is good, then update

if DMXAddress <> 0

BS2.Debug_Str(string("c="))

BS2.Debug_DEC(DMX.level(0))

BS2.Debug_Str(string(","))

repeat t0 from 0 to (_OffScreenArray - 1)

BS2.Debug_DEC(t0)

BS2.Debug_Str(string("="))

BS2.Debug_DEC(DMX.level(t0))

BS2.Debug_Str(string(","))

BS2.Debug_Str(string(13))

'Check that the data in the buffer is "dimmer" data and not RDM or other

'if DMX.level(1) == 0

'Gather the data from DMX buffer and place it in the LED Painter buffer

repeat t0 from 0 to (_OffScreenArray - 1)

chvalues[noparse][[/noparse]t0] := DMX.level(DMXAddress + t0)

'BS2.Debug_Str(string("DMX ACTIVATED",13))

'Update the LED Painter

WindowUpdate

full code is included.

DMX received said...
c=246,1=4,2=8,3=16,4=32,5=64,6=128,7=0,8=0,9=0,10=0,11=0,12=0,13=0,14=0,15=0,16=0,17=0,18=0,19=0,20=0,21=0,22=0,23=0,24=0,25=0,2
6=0,27=0,28=0,29=0,30=0,31=0,32=0,33=0,34=0,35=0,36=0,37=0,38=0,39=0,40=0,41=0,42=0,43=0,44=0,45=0,46=0,47=0,48=0,

JasonLights · 2009-02-20 22:22

after looking at other part of the hardware, it turns out that the dmx cable i was using was bad, the cable pulled out.

Timothy D. Swieter · 2009-02-21 03:50

Jason - did you get your problem solved? I haven't used the Enttex DMX USB Pro yet, but I gather it should work fine, but I know since I have only seen so much DMX hardware that there are probably still areas where the Propeller DMX driver could be improved. Please keep me informed as I would like to see you have success with the Prop Blade and your design.

A small note about the Propeller DMX-512A driver, which I think you might understand. The driver that I wrote gathers all the data from a DMX frame. This include the start byte as well as the 512 slots of data. In other words the driver can receive data that isn't dimmer data, so that is why there is a qualifier in the demo code you are looking at to make sure the start byte is 0 for dimmer data. A month or two ago I was looking at the RDM spec and realize that there is an adjustment in the DMX timing to make it better for RDM reception. The DMX-512A driver, as of yet, hasn't been adjusted for this. I will work on this though at some point in the future.

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Timothy D. Swieter, E.I.
www.brilldea.com - Prop Blade, LED Painter, RGB LEDs, uOLED-IOC, eProto for SunSPOT, BitScope
www.tdswieter.com

Problem with the Prop Blade and DMX

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