Author Topic: another hand held dmx tester  (Read 34436 times)

Offline rob

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Re: another hand held dmx tester
« Reply #60 on: February 21, 2010, »
I uploaded a new ASM file in the first post.  I found a glitch in the transmit menu under 16ch transmit i was not clearing out the channel counter upon re-entry to 16 channel transmit.  reload the file if you have already saved it.

Rob

Offline Aussiephil

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Re: another hand held dmx tester
« Reply #61 on: February 26, 2010, »
Update with photos

Case arrived today so thought i would see what fitted. Just grabbed some perfboard and a EXRX pcb

EXRX fits but will be real tight, no socket, icsp header shorted etc, but it does fit with the LCD module i got.

LCD Module when plugged into header socket, (only had double row to test), fit's neatly up to the clear plastic bezel, near perfect.

Case came with clear bezel and black mask to cut and apply, and good instructions on doing so.

Rob is just doing some work on the firmware then i can finalise the main pcb

any questions just ask.
Never enough time
Dont Forget - "Play Nicely"

Offline Aussiephil

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Re: another hand held dmx tester
« Reply #62 on: February 26, 2010, »
More Photos
Never enough time
Dont Forget - "Play Nicely"

Offline KeithTarpley

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Re: another hand held dmx tester
« Reply #63 on: February 26, 2010, »
Greetings,,,

Great, moving right along.

Keith
"Now I know the only foe is time." -Moody Blues

Offline vairmoose

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Re: another hand held dmx tester
« Reply #64 on: February 26, 2010, »
Lookin' Great!    8)

Larry
3 today (standing at light switch, holding two lighters)
Going live in 2012

Offline egenoup

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Re: another hand held dmx tester
« Reply #65 on: February 26, 2010, »
Looking good. 8)

Offline wbuehler

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Re: another hand held dmx tester
« Reply #66 on: February 26, 2010, »
Looks Good

Bill


David_AVD

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Re: another hand held dmx tester
« Reply #67 on: February 26, 2010, »
Looks crap....  Oh... I mean looks good!

 <la..

Offline Rod R

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Re: another hand held dmx tester
« Reply #68 on: February 26, 2010, »
Looking good phil hats off to you and Rob for upgrading this project.  <res.

Offline rob

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Re: another hand held dmx tester
« Reply #69 on: March 01, 2010, »
Hello Everybody.
thought i would give you a update. i am waiting on some parts from mouser. I am going to try a better way of detecting no DMX input and reverse connection.  also working on some source code to detect the received packet timing, break,MAB, frame, refresh rate, and count the number of frames.  i have the timing detection working but i still have to put it in to the rest of the program to see how well it all plays together. i am using 3 of the 4 16bit timers to catch the timing data.  that is why i am trying a hardware approach to detecting DMX signal and hope fully i will be able to detect reverse connection.  also in the order from mouser is a 3.3volt pic chip gonna try that out it will give a longer run time on batteries.

the hand held programmer as it stands right now is great. i am actually using to develope the new code.
i would not discourage any one form building it on a perf board.   I am just trying to keep Phil from having to make two board designs.

Thanks
Rob

Offline n1ist

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Re: another hand held dmx tester
« Reply #70 on: March 02, 2010, »
A quick search found this for detecting an open in the DMX line:
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/mike

Offline rob

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Re: another hand held dmx tester
« Reply #71 on: March 02, 2010, »
that is what i found.  thought i would give it a try.

Offline rob

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Re: another hand held dmx tester
« Reply #72 on: March 03, 2010, »
here are a couple of pictures of it picking up the data timing, using dmxpro utility one is at 10Hz refresh rate and the other is at 40Hz refresh rate. I could not get my O-scope pictures to come out readable at all, but with the DMXpro set at 40Hz refresh accual readings from the O-scope 39.9828 Hz , 192us break, and 12 to 12.5us for MAB. the channel count + startcode comes out at 513 and works well, i used a velleman USB-DMX interface to test  it.  It will read out the proper short packet reading.  I still have some work to do on the code and hardware.  i will try to have it finished by next week end.

Rob

Offline RJ

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Re: another hand held dmx tester
« Reply #73 on: March 03, 2010, »
That is really turning into a awesome device!   <res.

RJ
Innovation beats imitation - and it's more satisfying

Offline KeithTarpley

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Re: another hand held dmx tester
« Reply #74 on: March 04, 2010, »
Greetings,,,

Looks great!

Keith
"Now I know the only foe is time." -Moody Blues