[请教]向U盘发SCSI命令返回stall的问题

只看该作者 · 2008-5-12 09:33

在51上使用SL811扩展的USB接口,枚举过程通过了,开始发送Inquiry,
ReadFormatCapacity等SCSI命令初始化Ｕ盘。但是发现手头两个牌子Ｕ盘都
会在发送完ReadFormatCapacity后，返回stall。

参考网友的经验，在此时发送两条ClearFeature清除端点1和2的hatl状态，从
getstatus的返回打印看，halt状态是清除了，但是不知道为何接着发送的
RequestSense命令总是又返回stall。接下来的readcapacity命令的bulksend
阶段一直NAK过不去．

用bus　houd抓了一下其中一个Ｕ盘的打印，发现ＰＣ在ReadFormatCapacity
后有个RESET过程，却没有clearfeature．现在特想知道ＰＣ在这个RESET里到
底是做了什么事情，我在单片机这里应该如何做，感觉是个解决问题的关键。
希望知情网友帮帮忙，谢谢。

附：bus　houd的关于RESET的打印。有我的简略注释。

相关链接:https://bbs.21ic.com/upfiles/img/20076/200762794831996.rar

1万 · 2008-5-12 10:49

只看该作者 · 2008-5-12 11:58

RESET总线的话,那是否就是把U盘重新复位到地址0端口0重新配置的意思?但是看BUS HOUND里不像是这样哦，RST后接着是获取ReadFormatCapacity的status 阶段了，并无重新配置阿。如下：

  21.2  55 53 42 43  e0 44 c4 fe  fc 00 00 00  80 00 0a 23  ReadFormatCapacityDO    2us
        00 00 00 00  00 00 00 fc  00 00 00 00  00 00 00     ...............
  21.1                    （这里抓不到任何数据，PC到底干了什么？       ）       RSET   123us

  21.1  55 53 42 53  e0 44 c4 fe  00 00 00 00  01           Readformat的status DI   2us
                                                            返回

只看该作者 · 2008-5-12 11:59

main: Program Started!!!

*********************
* ENTER - IsMassDev *
*********************
======================
= Enter - EnumMassDev =
======================
= BEGIN - Get USB Device Descriptors
ep0Xfer cmd: 80 06 00 01 00 00 12 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
USB Device Descriptors: 12 01 00 02 00 00 00 40 fe 13 00 1d 00 01 01 02 03 01

= BEGIN - SetAddress(2)
ep0Xfer cmd: 00 05 02 00 00 00 00 00
= ep0Xfer- SETUP stage finish!
= ep0Xfer- data stage finish!
= USBXfer- Terminate on short packets!
= ep0Xfer- status stage finish!

= BEGIN - Get USB Device Descriptors again
ep0Xfer cmd: 80 06 00 01 00 00 12 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
Device Descriptors again: 12 01 00 02 00 00 00 40 fe 13 00 1d 00 01 01 02 03 01

= BEGIN - Get USB Configuration Descriptors
ep0Xfer cmd: 80 06 00 02 00 00 09 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
9bytes Configuration Descriptors: 09 02 20 00 01 01 00 80 64
ep0Xfer cmd: 80 06 00 02 00 00 20 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
32btyes Configuration Descriptors: 09 02 20 00 01 01 00 80 64 09 04 00 00 02 08 06 50 00 07 05 81 02 40 00 00 07 05 02 02 40 00 00

= BEGIN - Get Slave USB String Descriptors
ep0Xfer cmd: 80 06 00 03 00 00 02 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
2bytes String Descriptors: 04 03
ep0Xfer cmd: 80 06 00 03 00 00 04 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
4btyes String Descriptors: 04 03 09 04

= BEGIN - Get Slave USB Unkown Descriptors
ep0Xfer cmd: 80 06 03 03 09 04 02 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
2bytes Unkown Descriptors: 1a 03
ep0Xfer cmd: 80 06 03 03 09 04 1a 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
32bytes Unkown Descriptors: 1a 03 35 00 42 00 37 00 42 00 31 00 43 00 30 00 30 00 30 00 45 00 36 00 42 00

= BEGIN - Set_Configuration
ep0Xfer cmd: 00 09 01 00 00 00 00 00
= ep0Xfer- SETUP stage finish!
= ep0Xfer- data stage finish!
= USBXfer- Terminate on short packets!
= ep0Xfer- status stage finish!

= BEGIN - SetInterface
ep0Xfer cmd: 01 0b 00 00 00 00 00 00
= ep0Xfer- SETUP stage finish!
= ep0Xfer- data stage finish!
= USBXfer- Terminate on short packets!
= ep0Xfer- status stage finish!
======================
= FINISH - EnumMassDev =
======================

======================
= ENTER - IsMassDev  =
======================

IsMassDev: BulkIN  Endpoint = 1     MaxPkgSize = 64
IsMassDev: BulkOUT Endpoint = 2     MaxPkgSize = 64
ep0Xfer cmd: a1 fe 00 00 00 00 01 00
= ep0Xfer- SETUP stage finish!
= USBXfer- Retry on NAK!
= ep0Xfer- data stage finish!
= ep0Xfer- status stage finish!
======================
= FINISH - IsMassDev =
======================

InitMassDev: Enter ...

***********************
* ENTER - SPC_Inquiry *
***********************
BulkSend: Enter ---
= USBXfer- Retry on NAK!
BulkSend: Exit ===

    BulkRcv: Enter ---
    ****BulkRcv: BytesRcv = 36 RetryNum = 0
    BulkRcv: exit ---
SPC_Inquiry: return data=:00 80 00 01 1f 00 00 00 4b 69 6e 67 73 74 6f 6e 44 61 74 61 54 72 61 76 65 6c 65 72 20 32 2e 30 50 4d 41 50
    BulkRcv: Enter ---
    ****BulkRcv: BytesRcv = 13 RetryNum = 0
    BulkRcv: exit ---
SPC_Inquiry: CSW=:55 53 42 53 60 a6 24 de 00 00 00 00 00

**********************************
* ENTER - RBC_ReadFormatCapacity *
**********************************
BulkSend: Enter ---
BulkSend: Exit ===

    BulkRcv: Enter ---
= USBXfer- Terminate on STALL!
    ****BulkRcv: BytesRcv = -80 RetryNum = 0

ClearFeature: END point 1
ep0Xfer cmd: 02 01 00 00 01 00 00 00
= ep0Xfer- SETUP stage finish!
= ep0Xfer- data stage finish!
= USBXfer- Terminate on short packets!
= ep0Xfer- status stage finish!

ClearFeature: END point 2
ep0Xfer cmd: 02 01 00 00 02 00 00 00
= ep0Xfer- SETUP stage finish!
= ep0Xfer- data stage finish!
= USBXfer- Terminate on short packets!
= ep0Xfer- status stage finish!


    BulkRcv: Enter ---
    ****BulkRcv: BytesRcv = 13 RetryNum = 0
    BulkRcv: exit ---
RBC_ReadFormatCapacity: CSW=:55 53 42 53 60 a6 24 de 00 00 00 00 01

****************************
* ENTER - SPC_RequestSense *
****************************
BulkSend: Enter ---
BulkSend: Exit ===

    BulkRcv: Enter ---
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Terminate on NAK!
    ****BulkRcv: BytesRcv = -40 RetryNum = 0
****************************
* ENTER - RBC_ReadCapacity *
****************************
BulkSend: Enter ---
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Retry on NAK!
= USBXfer- Terminate on NAK!
BulkSend: usbXferRtnVal = -40
BulkSend: usbXfer FAIL ---

只看该作者 · 2008-5-12 12:04

请00同学帮帮忙分析一下，俺接触这个才几天，1.1协议翻烂了都没得要领。

PS. 俺也是ＳＣＵＴ的，００我跟你有几面之缘呢：）

只看该作者 · 2008-5-12 12:11

有点奇怪的是，这个kingston的Ｕ盘在format　或者　在ＰＣ写入过后，插单片机的板子上上电，第一次都如上，不过，然后断电，再上电，就次次都能过（RequestSense那里能过了，而不是ＮＡＫ），真是有点摸不着头脑。

我的ＮＡＫ重发间隔是１５毫秒（感觉已经大得离谱了...），重发次数最多２０次．

1万 · 2008-5-12 20:34

另外，对NAK的重试，可以一直试的，不用留什么间隔。

只看该作者 · 2008-5-13 10:32

允许了最多3次复位device的重试,缩短NAK重发间隔到若干个微秒,增大重发次数
至1000次.结果RequestSense那里重发了１７６次后就过了（无语...）．

不过手头这个Ｕ盘是解决了，还会碰到哪些钉子Ｕ盘还不清楚．．．．
Ｕ盘兼容性问题确实不好解决．

1万 · 2008-5-13 21:54

ReadFormatCapacity 就属于不需要的命令；试试不要发这个命令。

只看该作者 · 2008-5-14 10:38

此前调过一个U盘,不发ReadFormatCapacity就搞不定．发了就好了．
所以只能照发，加差错处理程序来补救了．＠＠

[请教]向U盘发SCSI命令返回stall的问题

相关下载

相关帖子

RESET就是reset了总线，重新设置地址，获取描述符，设置配置

继续请教:)

补充贴一下我在串口抓的打印

请00同学帮帮忙分析一下

有点奇怪的是

你可以复位总线，重新枚举试试。

问题暂时解决

如果是自己做的Host，没有必要发那些你不需要的命令

是这样的

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