Alan Stern,您好！
thank you !!!
my firmware can now act as a udisk now.
and can do creat ,copy ,delete etc .
yeah,i response the unsupported command as Alan said.
__then__ I read the Bulk-out endpoint to get next CBW.
the bus reset was caused by I didn't response to the next command after
stall.
but my firmware is still unstable.
when I remove some printk message in read/write endpoint IO accessing
function,
the device still raise bus reset.
and the speed is too low ,only 2KB/s in FS mode.
======= 2006-06-29 22:42:31 您在来信中写道：=======
>On Thu, 29 Jun 2006, JackRain wrote:
>
>> because I write the device usb firmware by myself,i print
>> less message only for the software flow chart.
>>
>> now:
>> 1)when device get READ_FORMAT_CAPCITY(0x23) command ,stall
>> the bulk-in endpoint.
>> 2)waitting for ep0setup interrupt,and get the clear_feature
>> request \
>> unstall the endpoint and toggle the DATA pid by
>> disable then enable the bulk-in endpoint (isp1582)
>
>You're supposed to set the data toggle to 0. Maybe disabling and then
>enabling the endpoint does that.
>
>> 3)bulk-in endpoint send a ACK signal to PC;
>
>This should not happen. The bulk-in endpoint should not send an ACK,
>since it has not received an IN pid.
>
>> 4)then send the CSW to PC to reflect the command status of
>> this unsupported command
>
>Okay. Remember to set dCSWResidue = dCBWDataTransferLength.
>
>> 5)EP0TX send a ACK signal to PC
>
>This isn't right. ep0 is supposed to send a 0-length packet to perform
>the handshake stage of the control message. Then the _host_ sends an ACK.
>
>> 6) bus reset.
>> 7)bulk-out endpoint interrypt occurs,read CBW
>> if command unsupported ,do the same thing 1~5;
>>
>> again bus reset.
>>
>> if command supported ,it's normal and go on processing SCSI
>> protocol.
>> and I can't see the disk tray icon on windows.
>> but because bus reset ,the device still won't work.
>
>Probably the bus resets occur because of the earlier protocol mistakes.
>
>Alan Stern
>
= = = = = = = = = = = = = = = = = = = =
致
礼！
JackRain
[EMAIL PROTECTED]
2006-06-30
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