Teledyne-lecroy USB File Based Decode Manual Uživatelský manuál stáhnout pdf (Strana 24)

COMPUTER ACCESS TECHNOLOGY CORPORATION USB REQUEST DEFINITION (.REQ) FILES

Reference Manual

See “Bitmap” on page 11 for another example of its use.

EndpointData Definitions

In addition to the AllRequests entry and the corresponding Request(...)

entries, a request definition file can have a set of EndpointData entries. An

EndpointData entry is used to define decoding for a class- or vendor-specific

data structure that can be transferred on USB using an Interrupt or Bulk endpoint,

according to a specific protocol. An example of this is the Hub and Port Change

Bitmap structure that can be transferred on the Interrupt endpoint (called Status

Change endpoint) according to Hub class protocol.

EndpointData entries contain Data definitions, which are preceded by some

global definitions for Caption, EndpointDirection, EndpointId,

EndpointType, MaxPacketSize and MaxTransferSize. The basic

structure of an EndpointData entry can be found on page 6.

Caption

Use Caption to create an identifying string for the EndpointData decoding

definition. It will appear when the mouse is positioned over the endpoint type/

direction field. For example:

Caption=Hub Status Change Endpoint

Figure 13: Displayed Caption definition

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Teledyne-lecroy USB File Based Decode Manual Uživatelský manuál Strana 24