Dynam 7ch rx binds to 2602tx

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11 Oct 2012 11:47 #2161 by NotFastEnuf
Dynam 7ch rx binds to 2602tx was created by NotFastEnuf
I have a dozen dynam 7ch receivers at home that all bind to my 2602 tx. All give me full range functionality and had thousands of flights over the last year with no problems. This could be great news to have a 14 dollar Rx for use in a fleet of park flyers. I have not gotten funds together to secure a devo yet but would appreciate anyone that could test deviation 2601 protocol on a dynam Rx and post the results. Maybe even 2801 protocol would make use of the 7th channel.

Thanks for everyone's efforts here!!!!!

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11 Oct 2012 12:59 #2162 by PhracturedBlue
Replied by PhracturedBlue on topic Dynam 7ch rx binds to 2602tx
Tell me where to obtain one of these Rx, and I'll try it out.

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11 Oct 2012 13:06 #2163 by FDR
Replied by FDR on topic Dynam 7ch rx binds to 2602tx
For example at nitroplanes:
www.nitroplanes.com/dy26chre.html

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11 Oct 2012 15:04 #2165 by FDR
Replied by FDR on topic Dynam 7ch rx binds to 2602tx
Dynam:


Walkera RX-2701:


Colored differently, but otherwise they are the same... :lol:

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11 Oct 2012 15:34 #2166 by vlad_vy
Replied by vlad_vy on topic Dynam 7ch rx binds to 2602tx
They both not compatible with 2801 protocol.

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11 Oct 2012 15:59 #2167 by PhracturedBlue
Replied by PhracturedBlue on topic Dynam 7ch rx binds to 2602tx
Well, I'll get one to add to my collection. Stil haven't figured out why 2601 protocol doesn't work though. It'll likely need to wait until I can actually experiment in person.

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11 Oct 2012 16:27 - 11 Oct 2012 16:29 #2171 by NotFastEnuf
Replied by NotFastEnuf on topic Dynam 7ch rx binds to 2602tx
So 2801 protocol will not link to the 7 ch Rx? What about 2601 protocol? Is it not working at all? What can I do with my 2602 tx to help you?
Last edit: 11 Oct 2012 16:29 by NotFastEnuf.

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11 Oct 2012 16:39 - 11 Oct 2012 16:40 #2173 by PhracturedBlue
Replied by PhracturedBlue on topic Dynam 7ch rx binds to 2602tx

NotFastEnuf wrote: So 2801 protocol will not link to the 7 ch Rx? What about 2601 protocol? Is it not working at all? What can I do with my 2602 tx to help you?

Unless you have a logic analyzer, nothing at all.
Deviation will likely bind to the 7ch Rx, and some channels may work, but servos won't behave properly from my understanding.
Last edit: 11 Oct 2012 16:40 by PhracturedBlue.

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12 Oct 2012 03:44 - 12 Oct 2012 04:35 #2177 by NotFastEnuf
Replied by NotFastEnuf on topic Dynam 7ch rx binds to 2602tx
Willing to invest in one if it would help the cause. How many channel would be necessary? I see some 8ch logic analyzers that are not too expensive.

Also if 8 ch is enough, I could always use the parallel port on the computer as a logic analyzer.
Last edit: 12 Oct 2012 04:35 by NotFastEnuf.

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12 Oct 2012 06:38 - 12 Oct 2012 06:40 #2178 by PhracturedBlue
Replied by PhracturedBlue on topic Dynam 7ch rx binds to 2602tx
You'll need to be able to sample an SPI bus (4 channels) at 8MHz which I think rules out parallel-port solutions.

I love my Saleae Logic, and would strongly recommend it. They also give great customer service.
But on a budget, you might look here for similar models:
sigrok.org/wiki/Fx2lafw

I personally like the unlimited sample-size supported by theses 'streaming' type analyzers, but at least one other user had good luck with one of these:
www.seeedstudio.com/depot/preorder-open-...-p-612.html?cPath=75
and even less expensive, this would likely also work:
www.seeedstudio.com/depot/logic-shrimp-v...p-803.html?cPath=174
or even:
www.seeedstudio.com/depot/bus-pirate-v3-...609.html?cPath=61_68

(regardless of choice, make sure you also get probe cables!)

With all that said, you can likely also choose to be patient. I won't be able to do much debug for another week anyway, and there are members with the necessary hardware to provide additional logs should they be necessary.
Last edit: 12 Oct 2012 06:40 by PhracturedBlue.

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12 Oct 2012 16:40 - 12 Oct 2012 16:40 #2180 by FDR
Replied by FDR on topic Dynam 7ch rx binds to 2602tx

PhracturedBlue wrote: Well, I'll get one to add to my collection. Stil haven't figured out why 2601 protocol doesn't work though. It'll likely need to wait until I can actually experiment in person.


Because there is something is missing from both the documentation and implementation:
Ch1-4 are there, but only one bit is sent from Ch5 and Ch6 (which should be the pitch otherwise).
In the data package byte 5, 6, 7 are always null, however I think there should be something sent...
Last edit: 12 Oct 2012 16:40 by FDR.

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12 Oct 2012 17:45 #2182 by PhracturedBlue
Replied by PhracturedBlue on topic Dynam 7ch rx binds to 2602tx
That is because all of the logs I've seen show those bytes zeroed out. It doesn't mean they aren't used, but does mean they weren't used in the configurations I have captures of.
One possibility is that these are treated just like the lower 4 channels. It would be easy to wire them up and see what happens I suppose.

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12 Oct 2012 18:15 - 12 Oct 2012 18:18 #2183 by vlad_vy
Replied by vlad_vy on topic Dynam 7ch rx binds to 2602tx
Ch7 used for gyro sensitivity adjustment. By rotating V1 knob.
Last edit: 12 Oct 2012 18:18 by vlad_vy.

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12 Oct 2012 18:38 - 12 Oct 2012 18:57 #2184 by PhracturedBlue
Replied by PhracturedBlue on topic Dynam 7ch rx binds to 2602tx
so 3 zeroed bytes, 3 missing channels, seems like a safe bet this is where they are.
Included is a trial DFU that adds 7 channel support to the WK2601 protocol. It is completely untested and may not work at all, but I'd be interested in feedback with any 2601-only Receivers.

Note. you need the filesystem (not dfu) from here:
www.deviationtx.com/forum/5-news-announc...l-build-fab82a525bdb
Attachments:
Last edit: 12 Oct 2012 18:57 by PhracturedBlue.

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12 Oct 2012 18:44 #2185 by vlad_vy
Replied by vlad_vy on topic Dynam 7ch rx binds to 2602tx
What filesystem to use? From v1.1.2 or ???

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12 Oct 2012 18:55 - 12 Oct 2012 18:56 #2186 by PhracturedBlue
Replied by PhracturedBlue on topic Dynam 7ch rx binds to 2602tx
Good point. You need the new filesystem (not dfu) from here:
www.deviationtx.com/forum/5-news-announc...l-build-fab82a525bdb
Last edit: 12 Oct 2012 18:56 by PhracturedBlue.

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12 Oct 2012 19:36 #2187 by NotFastEnuf
Replied by NotFastEnuf on topic Dynam 7ch rx binds to 2602tx
I will test the 7 Channel rx with the 2602tx tonight and report on which signal is mapped to which channel. I do not remember exactly what the configuration is above the basic 4 channels but something is strange about the channel assignments. I also have another Walkera branded 2608 RX that is much smaller - and channel assignments above the basic 4 on that are completely different than the 7ch. In fact, that one will not operate the gear channel at all from the 2602 TX if memory serves me correctly.

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13 Oct 2012 10:13 #2195 by NotFastEnuf
Replied by NotFastEnuf on topic Dynam 7ch rx binds to 2602tx
Tested the 7ch Rx tonight. Gear switch on the 2602 tx goes to ch 5 and gyro control goes to aux 2 which would appear to be ch 7. This is strange that nothing seems to map to ch 6. Will test the 6 ch Rx model 2608 tomorrow as it is buried inside a 3d pulama bipe. I think it had no channel slot that would operate on the gear switch with this Rx.

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16 Oct 2012 10:02 #2279 by NotFastEnuf
Replied by NotFastEnuf on topic Dynam 7ch rx binds to 2602tx
Concerned about the filesystem link posted above. It crashes the emulator when scrolling through the settings menu. Should I really try to dump it in the transmitter like this?

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16 Oct 2012 16:05 #2287 by PhracturedBlue
Replied by PhracturedBlue on topic Dynam 7ch rx binds to 2602tx
I did not release an emulator that is compatible with that filesystem I think.
you can ask around, several folks have used the latest code with the new filesystem. It has some known issues (boot-loop on USB and telemetry page when exiting for instance) but overall is generally ok. Or you can wait another week when I am able to do proper testing myself.

The worst case is you need to go back to the official release.

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