Forum: RDM Interpretation Questions
September 2nd, 2011
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Replies: 8
Views: 17,310
Just my two cents worth but I do a lot of work...
Just my two cents worth but I do a lot of work with fountains and a lot of it is bit addressed devices. So I propose considering push the sub device limit out to 4096 in the next revision. I feel...
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Forum: RDM Physical Layer/Hardware Discussion
September 26th, 2010
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Replies: 2
Views: 14,600
Crossed wires
You will have to be able to recognize bad data as the result of crossed wires but these http://focus.ti.com/docs/prod/folders/print/sn65hvd1794.html will let you swap wires on chip.
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Forum: RDM General Implementation Discussion
January 18th, 2010
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Replies: 19
Views: 31,131
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Forum: RDM General Implementation Discussion
October 16th, 2009
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Replies: 6
Views: 13,111
The only possible problem I see with using DMX...
The only possible problem I see with using DMX personalities is that if in the future you add more channels, frequencies, or current settings you could easily find yourself exceeding the 8-bit limit...
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Forum: RDM Timing Discussion
July 6th, 2009
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Replies: 4
Views: 15,099
E1.20 - 2006 states in section 3.2.1 Responder...
E1.20 - 2006 states in section 3.2.1 Responder Packet Timings "RDM responders shall conform to the timing specified in Table 3-3". Table 3-3 line 1 shows max Receive Break and MAB times as 1S. Later...
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Forum: RDM Physical Layer/Hardware Discussion
June 25th, 2009
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Replies: 24
Views: 37,003
Code Size
I may have misled you a little bit my code is a bit large. Each PID has its own function with a lot of redundant code that could be removed by combining the common parts of the PIDs. I do think...
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Forum: RDM Physical Layer/Hardware Discussion
June 25th, 2009
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Replies: 24
Views: 37,003
Code size
We've just completed as design with DMX, RDM, Closed loop PID control and a rather large ASCII interface for bench testing and calibration during manufacture. The RDM also has an additional 10...
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Forum: RDM General Implementation Discussion
June 25th, 2009
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Replies: 11
Views: 22,601
microFTP
I agree the a firmware download addition to RDM would be very difficult to implement in a way that would useful to all user's with the different hardware requirements of all the different...
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Forum: RDM Interpretation Questions
June 25th, 2009
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Replies: 6
Views: 13,339
LAMP FORCED OFF
We've implemented a similar function but not for lamp control. One thing we did was make the command non-persistent so that a reset or power cycle would return our device to normal operation.
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Forum: RDM Timing Discussion
May 22nd, 2009
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Replies: 6
Views: 23,419
With the exception of the break and MAB timing...
With the exception of the break and MAB timing the FTDI and SiLabs chips have large enough FIFO's that for most RDM packets the inter-slot time would be zero as long as your USB driver can push the...
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Forum: RDM Interpretation Questions
April 16th, 2009
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Replies: 2
Views: 10,387
Command Class / Parameter ID mismatch handling
What is the consensus on how a responder should handle and respond to a Command Class CC data and Parameter ID PID data mismatch. As an example if the CC data is DISCOVERY_COMMAND and the PID data is...
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Forum: RDM Physical Layer/Hardware Discussion
April 9th, 2009
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Replies: 7
Views: 16,841
Another option might be to use a chip like the...
Another option might be to use a chip like the Intersil ISL3296E with series resistors to limit the drive current to provide the line bias. You could even only enable the bias while the Controller is...
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Forum: RDM General Implementation Discussion
April 9th, 2009
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Replies: 4
Views: 11,560
Multiple Discovery Responses
If the first responder can start its response right at the 176uS Min time from Table 3-4 and transmit the response with a 0S inter-slot time this will take 1.1mS. If the second responder can start...
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