USB枚举成功,但是用串口助手无法打开该串口,用Bus Hound抓到的数据如下,我也是刚接触USB不知道如何下手分析。
Bus Hound 6.00 capture on Windows Vista Service Pack 1 (x64). Complements of www.perisoft.net
Device - Device ID (followed by the endpoint for USB devices)
(27) STMicroelectronics Virtual COM Port (COM7)
(33) STMicroelectronics Virtual COM Port (COM7)
Phase - Phase Type
ASTS ATA task file status NTSTS NTSTATUS value
ATA ATA task file command RESET bus reset
CMD SCSI/ATAPI command USTS USB status
IN Data in transfer ok command complete
Data - Hex dump of the data transferred
Descr - Description of the phase
Cmd... - Position in the captured data