有没有做嵌入开发的，我用s3c2440板子用方口USB线与UBUNTU 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：<div>Bus 002 Device 004: ID 5345:1234 Owon PDS6062T Oscilloscope<div class="gmail_quote">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 clear="all"><br>-- <br>best,<br><font color="#888888">henry cui<br>
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