Old USB hub causing xTIMEcomposer to hang?

Technical questions regarding the xTIMEcomposer, xSOFTip Explorer and Programming with XMOS.
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aclassifier
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Old USB hub causing xTIMEcomposer to hang?

Postby aclassifier » Thu Aug 24, 2017 9:33 pm

I have had problems with xTIMEcomposer hanging with a rotating wheel (Mac) so much, actually for years, every new version, no change. I have had to kill it by hand. It seemed to be happening when I started debugging or changing window or something in that area.

But then, the other day I thought that maybe it was my old USB hub? It is a IOGEAR 7-Port USB 2.0 / FireWire Hub: https://www.iogear.com/support/dm/manual/GUH420. I have had it since 2005.

When I stopped using it and just used a point-point USB cable from the iMac to the XTAG3 running xCORE-200 eXplorerKIT I haven't had a single incidence of this hanging?

May the observation be probable? May it be the xTIMEcomposer USB stack that has a glitch?

If so, is there a USB hub that would work?
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Postby CousinItt » Mon Aug 28, 2017 2:30 pm

I've been using a D-Link DUB-H7, both with and without its power supply, and it's been fine. I do have the occasional problem with the link hanging up but I don't have any reason to blame the hub, and it's not happened often enough for me to investigate. Just unplugging the xTAG and reconnecting fixes it. My mouse isn't connected via the hub and the other devices that are connected are dormant or off.
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Postby aclassifier » Tue Aug 29, 2017 9:48 am

Which version of xTIMEcomposer, operating system and XMOS boards are you using? Maybe this could be a thread to list any problems people might have in this area and see if they might correlate to usage of a USB hub?

Maybe you could try to take it further than "occasional problem", provided you use that system so often that this is possible? In my case that occasional problem happening quite often and then not seen might be of interest. My hypothesis is the old USB hub.
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Postby CousinItt » Tue Aug 29, 2017 11:06 am

If it's relevant: xTIMEcomposer 14.3.0, Windows 7 64-bit, xCORE-200 eXplorer and startkit. The simplest thing is to try a different hub.
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Postby aclassifier » Tue Aug 29, 2017 2:06 pm

Alternatively with or without a hub, if the machine has enough USB contacts.
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Postby aclassifier » Sun Sep 03, 2017 8:03 pm

I discovered in "No Available Devices Found" at http://www.xcore.com/viewtopic.php?f=44&t=2497 that is also showed problems using a hub, albeit with a different problem

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