|
Message
From: Mikhail A<fopencores@t...>
Date: Tue Dec 2 05:53:36 CET 2003
Subject: [usb] USB 1.1 host controller: SET ADDRESS is ACK'ed, but ignored
I am trying to write an USB 1.1 host controller to connect a usb video
camera to the Xilinx FPGA. I am having strange problems with Set Address
Command - it is recieved and ACKed, but the device still does not respond
to the command.
I am using usb_phy from "USB 1.1 Function IP Core" and PDIUSBP11A for UTMI
and hardware interface. I was able to read the device descriptor, so I
believe that the physical part of the protocol works.
I do not have USB bus analyzer, but logic analyzer shows the following:
-30ms..0ms: "reset" hit. the bus is in SE0 state
0ms..15ms: reset recovery. Only SOF packets are being sent
16ms:
host sends SOF,
host waits 64 bit times
host sends "SETUP to Pipe0 Device0", 2D 00 10
host sends DATA0, "set address to 4":
C3 00 05 04 00 00 00 00 00 EB 70
device sends ACK ( D2 )
17ms:
host sends SOF,
host waits 64 bit times
host sends "IN from Pipe0 Device0", 69 00 10
device sends empty DATA1 packet: 4B 00 00
host waits 32 bit times
host ACK's packets: D2
18ms..31ms: idle time, sending SOF only
32ms:
host sends SOF,
host waits 64 bit times
host sends "SETUP to Pipe0 Device4", 2D 04 28
host sends DATA0, "get descriptor":
C3 80 06 00 01 00 00 12 00 E0 F4
now, the device is supposed to ACK the packet, but it does not
device does not send anything.
What could be wrong here?
I will be happy to provide any additional information.
Mikhail
--
To unsubscribe from usb mailing list please visit http://www.opencores.org/mailinglists.shtml
|
 |
Browse
