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It gives something like that in low speed
mode after bit stuffing and NRZI encoding :
(IDLE)
SYNC
NOTPID-PID DEVICE
ADDRESS ENDPOINT ADDRESS
CRC5
SE0 JSTATE
(IDLE)
01010100 0111
0010 1010101 0101
01011
Since every obvious byte is right the problem must
lie in the CRC5. I'm not sure I'm right on this particular one.
You can use the usbf_crc5.v file in the USB 2.0
function core to generate your CRC5 look at usbf_pa.v or usbf_pd.v to know the
exact input order
----- Original Message -----
From:
光明 徐
Sent: Saturday, August 10, 2002 3:58
AM
Subject: [usb] hi
hi:
i usb 1.1,first i config reg to enable endpoint 0, then i send
1010100 01110010 1010101 0101 00101 ,the following is two bit time SE0,and J
state
this is a setup token ,but why get error????
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