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Message
From: dmakwana@s...<dmakwana@s...>
Date: Thu May 27 12:00:03 CEST 2004
Subject: [usb] Ask a help on
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@s...
----- 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 <= #1 POR;
> else
> if(usb_vbus) state <= #1 POR;
> else state <= #1 next_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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