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Message
From: Virendra<virendradhavale@y...>
Date: Tue Aug 31 07:52:52 CEST 2004
Subject: [usb] CRC in zero ln. data pkt.???
Hi,
I am into designing of USB device controller. The problem that I am facing is that of the CRC in zero length data packet. There are three querries as such:
1. Do we, as a USB device, send 16 bit CRC when we send a zero length data packet in the status stage of the control write transfer performed by host?
2. If this CRC is to be sent, then what would be those 16 bits? Because, there is no data as such that goes into my CRC calculator.
3. What would be the CRC when host sends a zero length data packet?
Please help me out.
Regards.
Virendra
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