请问一下，下面的字段在USB协议里面是怎么定义的？谢谢大家看看，能看出什么规律，目前已知的事第0位到第3位是USB这3个字母的ASCII码，第30位和第31位是"USB Storage Command"，可以在UFI里查到具体的CMD (
http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf)
大家看看，能不能看出什么规律？
;MessageContent="55534243123456780000000000000601000000000000000000000000000000";MessageContent="55534243123456780000000000000601000000000000000000000000000000";MessageContent="55534243123456780000000000000601000000000000000000000000000000";MessageContent="55534243785634120100000080000601000000000000000000000000000000";MessageContent="55534243785634120100000080000601000000000000000000000000000000";MessageContent="55534243123456780000000000000601000000000000000000000000000000";MessageContent="55534243123456780000000000000601000000000000000000000000000000";MessageContent="55534243123456780000000000000601000000000000000000000000000000";MessageContent="55534243123456780000000000000600000000000000000000000000000000";MessageContent="555342434056af880000010080000a28000000001c00002000000000000000";MessageContent="5553424312345678000000000000061b000000020000000000000000000000";MessageContent="5553424312345678000000000000061b000000020000000000000000000000";MessageContent="55534243123456780000000000000606f50402527000000000000000000000";MessageContent="5553424328932a86000000000000061b000000020000000000000000000000"
其实我是在做ISOS下的一些3G USB Modem的driver，其中要强制给他mode switch, 就是把device 从 USB MassStorage mode switch 到USB Modem，而上面的MessageContents的值就是mode switch的时候，强制覆盖让他变成USB Modem的内容。。
谢谢
