Teledyne-lecroy USB File Based Decode Manual Uživatelský manuál stáhnout pdf (Strana 31)

COMPUTER ACCESS TECHNOLOGY CORPORATION USB DESCRIPTOR DEFINITION (.DSC) FILES

Reference Manual

WordValue={

0x01=DEVICE type

0x02=CONFIGURATION type

0x04=INTERFACE type

0x05=ENDPOINT type

...

}

...

Data={

Length=?

Descriptors=TRUE

}

When wValue is 0x01, the decoder will look for a descriptor definition with a

DescriptorType value of 0x01. If found, the descriptor information will be

decoded and displayed in the trace output.

DescriptorSubtype

This entry is used only in conjunction with a DescriptorType entry. Its value

is the assigned subtype code. This keyword was introduced specifically to support

the descriptor format extension adopted by the Audio device class. Any other class

or vendor descriptor specification based on this extension may utilize the

DescriptorSubType keyword as well.

ClassCode

This entry is used only when the referring .req file contains GroupType=Class.

The ClassCode value is the USB-assigned class code. Its value should match the

ClassCode value in the .req file that references the descriptor definition.

Example from hub.req:

GroupName=Hub Class

GroupType=Class

ClassCode=0x09

Corresponding example from hub.dsc:

DescriptorName=HUB

DescriptorType=0x29

ClassCode=0x09

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Teledyne-lecroy USB File Based Decode Manual Uživatelský manuál Strana 31