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Forum Topic - usb status for devices beyond tier 1? (QNX6.3.2): (4 Items)

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Jeffrey Percival

05/05/2016 4:08 PM

post116233

usb status for devices beyond tier 1? (QNX6.3.2)

I have a 4-port USB hub connected to my root hub in the CPU's USB controller. I'm trying to list the devices connected 
to my 4-port hub. Sort of recursively identify the hierarchy of devices. the usb utility seems only to see the hub 
itself, but not any of the devices connected to that hub.

My goal is to use Triadem's devu-ftdix32-speed driver to talk to my FTDI uart chip, but it doesn't see the devices 
beyond the root hub either.

I tried the -vvv options to usb, to no avail. Any thoughts?

Gervais Mulongoy

05/06/2016 10:34 AM

post116241

RE: usb status for devices beyond tier 1? (QNX6.3.2)

Are you sure the 4 port hub actually works?

Jeffrey Percival

05/06/2016 12:03 PM

post116242

Re: RE: usb status for devices beyond tier 1? (QNX6.3.2)

You are wise, sir! We had tested the hub at an earlier stage of assembly, but apparently something changed as we build 
up our pc-104 stack. A simple substitution of a commercial hub works as expected.

Something we're pursuing now is that our custom hub shows up fine when I plug it into my Mac, and the "System Report" 
shows the hub and all connected devices. Same experiment on QNX6.3.2 doesn't work.

Thanks for your helpful suggestion!

Gervais Mulongoy

05/06/2016 4:03 PM

post116250

RE: RE: usb status for devices beyond tier 1? (QNX6.3.2)

Might we worth putting a USB analyzer between  the hub and the pc.

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