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Message
From: sip@b...<sip@b...>
Date: Wed Feb 18 15:04:33 CET 2004
Subject: [usb] USB11 core test
Hi,
I am evaluating the USB11 core on a Xilinx virtex2 fpga. I am using the
tranceiver from Philips PDIUSBP11A. When I plug in the device Windows
2000 replies with Found new hardware (I am still happy).
I have downloaded the test software from usb.org called USBCV R1.2.1,
and I can perform test from the test suite, but I have problems passing
the tests (even get configuration descriptor). The enummeration test is
performing enummeration in a loop. It is failing at different counts each
time the test is run ?
Has anyone tried this test tool on the USB11 core?
The rom is giving the usb version number 1.0. Why if? it is version 1.1.
The bmAttributes bit D7 is not set to 1 (table 9.8 in USB spec rev 1.1)
in the configuration descriptor in the rom, why ?
When the USB11 core has been addressed or configured there is no way
out of this state (am I right).
This feature is used by the USB.org test tool in order to exercise all
commands in all states. From the device state diagram figure 9-1 I can
see that it is possible to go from configured state to addressed state,
but it is not shown that you can go from the addressed state to the
default state. A set address request with address 0 should set a device
in addressed state to default state (see section 9.4.6 of spec)
I hope someone has some comment to my statements
/sip
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