Forums › General Discussions › FTDI Incompatabilities?
- This topic has 3 replies, 2 voices, and was last updated 2 years, 10 months ago by Justin Crooks.
kaiserParticipantkaiser July 14, 2020 at 9:51 am
I have a system with an SM200B in and as well as a VectorNav VN-310.
The VN-310 is using a USB -> serial adapter to talk with Windows. It works great. Until I plug in the SM200B, and it clobbers it. If I bring up Spike, plug/unplug, or whatever I can sometimes get them both to work. But usually not without some major dancing on my part.
I used the latest drivers on SignalHound and the problem still persists.
The interesting thing is that it was working a couple of weeks ago – I figure that some update somewhere caused this issue.
So, does anyone know of any solutions? Are there older or newer drivers I can try out? Thoughts?
Justin CrooksModeratorJustin Crooks July 15, 2020 at 9:40 am
I see two possibilities here.
1) The sheer data rate of the SM200B is causing problems, or
2) When you installed the software, you also installed the FTDI driver for our SA44B, which is somehow incompatible with the VN-310.
If you re-install the VN-310 driver does it help? If you use FTDI’s “CDM uninstaller” with the VID/PID of the VN-310, and then plug it in, does it help?
kaiser July 15, 2020 at 10:45 am
- This reply was modified 2 years, 10 months ago by kaiser.
Thanks Justin. I had tried all of those things before posting with no joy. I tried the 12.0 version, the .28 and the .26 version of their drivers, uninstalling, re-installing, etc with no success. Using the CDM uninstaller and more.
It’s a RS-422 chip for the VN-310, and I wonder if there’s something special there or not.
I *swear* that I had all 3 working together about 4-5 weeks ago, and I’m not sure what broke it — a Windows update, or something else, or if I just fooling myself about all 3 working at once. We don’t even need to pull up Spike, just plugging a single SM200B into power, is an immediate stoppage on the VN-310….like right as Windows enumerates the drivers, it goes bye-bye. I’ll be watching data stream in the terminal, and then it will stop and just send NULL and BREAK repeatedly. Unplug the SM200B and instantaneously data starts flowing again.
We bought some converters so that we can try and shove it in a resident serial port on the computer and see if it works that way.
For my own reference/googling/spec sheet hunting, what does the SM200B use for it’s USB chip — is there some serial<->USB conversion or something else going on on the front end?
Justin CrooksModeratorJustin Crooks July 15, 2020 at 3:53 pm
It’s a Cypress FX3 chip, CYUSB3014
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