linux-usb-users，您好！
I have a question about the host/device disagreement on data transfer
stage:
1/ the usb device is capable to receive ,saying 8192 Bytes data ,and
process it (writing to nand flash ),
but host is indicating 65536 Bytes /*(cmd[7] < < 8) | cmd[8]) *BLOCK_SIZE
*/ to send to device.
how can I balance the speed difference between host and device ? I
want the usb device finish processing the received data
before the host send out data ,so that device can handle the incoming
data and won't cause a TIMEOUT reset.
2/ when copy a little several MB file to U-disk,it won't crash ,and very
fast,the speed is up to 780KB/s in Full-speed.
right now,my usb device driver will crash if repeat copy & delete the
file on the U-disk or copy a huge file to U-disk from PC.
I found the system memory is very low after this operation,from 18MB to
370KB.
someone told me that it is caused by the filesystem cache which too
much data in ,but can't write to nand flash inmediately.
any ideas are appreciated~! thank you
致
礼！
JackRain
[EMAIL PROTECTED]
2006-10-08
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys -- and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Linux-usb-users@lists.sourceforge.net
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-users
