我碰到过,当时也没去找原因。我也想知道原因?有没有人知道呢?<br><br><div class="gmail_quote">在 2010年8月27日 下午1:26,henry cui <span dir="ltr"><<a href="mailto:hhenry.cui@gmail.com">hhenry.cui@gmail.com</a>></span>写道:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
有没有做嵌入开发的,我用s3c2440板子用方口USB线与UBUNTU<br>
PC连接,第一次插入是好的,拔出后再插入一定会死机,有谁知道原因吗?,s3c2440板子在ubuntu中的显示如下:<br>
Bus 002 Device 004: ID 5345:1234 Owon PDS6062T Oscilloscope<br>
Device Descriptor:<br>
bLength 18<br>
bDescriptorType 1<br>
bcdUSB 1.10<br>
bDeviceClass 255 Vendor Specific Class<br>
bDeviceSubClass 0<br>
bDeviceProtocol 0<br>
bMaxPacketSize0 8<br>
idVendor 0x5345 Owon<br>
idProduct 0x1234 PDS6062T Oscilloscope<br>
bcdDevice 1.00<br>
iManufacturer 1<br>
iProduct 2<br>
iSerial 0<br>
bNumConfigurations 1<br>
Configuration Descriptor:<br>
bLength 9<br>
bDescriptorType 2<br>
wTotalLength 32<br>
bNumInterfaces 1<br>
bConfigurationValue 1<br>
iConfiguration 0<br>
bmAttributes 0xc0<br>
Self Powered<br>
MaxPower 50mA<br>
Interface Descriptor:<br>
bLength 9<br>
bDescriptorType 4<br>
bInterfaceNumber 0<br>
bAlternateSetting 0<br>
bNumEndpoints 2<br>
bInterfaceClass 255 Vendor Specific Class<br>
bInterfaceSubClass 0<br>
bInterfaceProtocol 0<br>
iInterface 0<br>
Endpoint Descriptor:<br>
bLength 7<br>
bDescriptorType 5<br>
bEndpointAddress 0x81 EP 1 IN<br>
bmAttributes 2<br>
Transfer Type Bulk<br>
Synch Type None<br>
Usage Type Data<br>
wMaxPacketSize 0x0040 1x 64 bytes<br>
bInterval 0<br>
Endpoint Descriptor:<br>
bLength 7<br>
bDescriptorType 5<br>
bEndpointAddress 0x03 EP 3 OUT<br>
bmAttributes 2<br>
Transfer Type Bulk<br>
Synch Type None<br>
Usage Type Data<br>
wMaxPacketSize 0x0040 1x 64 bytes<br>
bInterval 0<br>
Device Status: 0x0000<br>
(Bus Powered)<br>
<br>
<br>
--<br>
best,<br>
henry cui<br>
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