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by Unknown on May 27, 2004 |
Not available! | ||
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Dear Mr. NI haiqiao,
Yes, you are true, even I have found the same thing during hardware
testing of the USB2.0 IP.
The only solution to this is just to hardcode the usb_vbus_pad_i signal
to "0".
Currently I am in stage of testing the core and I was suceessfully
passed the Speed Negotiation phase and the host perfectly responded
for High Speed device with Chirp KJKJKJ sequence, and after that I am
also geting SOF command in high speed mode, but them some thing
happens to the core and I am not getting SETUP command for "Get
Descriptor".
Please help me if have passed the Enumeration pahse for USB2.0 IP.
Thanks & Regards
Deepak Makwana
dmakwana@slscorp.com
----- Original Message -----
From: nihq@r...
To: usb@o...
Date: Sun, 12 Jan 2003 04:52:08 -0100
Subject: [usb] Ask a help on
Dear expert: I cannot understand How the usb_vbus_pad_i (Vcc of USB connector) of UTMI interface effect the attached flag. I look look through the usbf_utmi_ls.v and find that if Vcc ( here is usb_vbus) is always logic "1", then the the machine state is always in powon or reset state. always @(posedge clk or negedge rst) if(!rst) state else if(usb_vbus) state else state But you know the usb_vbus (Vcc) is always logic "1" when the usb connector is powered. Then the usb_core will never work to the useful state. Could any expert give me a hint? Thank Vikas T Rao for your previous answer! best regards NI haiqiao |
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