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Forum: RDM General Implementation Discussion May 25th, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
This is my understanding as well.

This is my understanding as well.
Forum: RDM General Implementation Discussion May 25th, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
> In the case with DMX_START_ADDRESS it wont >...

> In the case with DMX_START_ADDRESS it wont
> make any difference for the controller, hence you
> could go with either SET_RESPONSE or
> GET_RESPONSE.

I'd argue that it does make a...
Forum: RDM General Implementation Discussion May 24th, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
I'm not sure what the best solution is. GET...

I'm not sure what the best solution is.

GET QUEUED_MESSAGES can return a SET as a followup to an earlier ACK_TIMER, but there's no mention of a responder-generated SET queued message in the...
Forum: RDM General Implementation Discussion May 19th, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
> What happens with the STATUS_GET_LAST_MESSAGE ...

> What happens with the STATUS_GET_LAST_MESSAGE
> response if there is no last message to resend

Good question.

I'd probably respond with a STATUS_MESSAGES response (similar to E1.20 section...
Forum: RDM General Implementation Discussion May 18th, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
Byte 3/4 counting from where? Looking at...

Byte 3/4 counting from where?

Looking at table 6-6 in the standard, the sub-device goes in slots 18 and 19. It's after the Message Count and before the Command Class.

For the GET QM request,...
Forum: RDM General Implementation Discussion May 18th, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
The "GET QUEUED_MESSAGES" request is sent to the...

The "GET QUEUED_MESSAGES" request is sent to the root device, but the response can come from any sub-device.

For example, if the user changes the DMX Address of two sub-devices, then the responder...
Forum: RDM General Implementation Discussion March 2nd, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
As Michael said earlier, you don't need an actual...

As Michael said earlier, you don't need an actual queue.

Lets say you have 5 sub-devices, each with 2 PIDs that you need to track QUEUED_MESSAGES for (DMX address and Personality). That's a...
Forum: RDM General Implementation Discussion March 2nd, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
> issuing new software for existing products. ...

> issuing new software for existing products.

Having spent hundreds of hours in 8051 assembly lately, I understand...

Using a real queue you could do it in 3 bytes per message (1 byte for the...
Forum: RDM General Implementation Discussion March 2nd, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
"Enormous" is relative. I've seen RDM devices...

"Enormous" is relative. I've seen RDM devices with everything from 192 bytes of RAM to 128 MiBytes.

Hundreds of messages in the queue might be impractical for many of the older 8-bit...
Forum: RDM General Implementation Discussion March 2nd, 2010
Replies: 33
Views: 31,473
Posted By ericthegeek
At first, it seems a bit wasteful to have to...

At first, it seems a bit wasteful to have to constantly poll for updates. But most controller implementations will send a packet to every device on the link periodically to make sure that device is...
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