Teledyne-lecroy USB File Based Decode Manual Manual de usuario descargar pdf (Pagina 13)

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

Reference Manual

the output changes to this:

A FormatValue entry can also be used somewhat like the 'else' portion of an if-

else statement to specify the formatting of default behaviors. To do this, place the

FormatValue entry inside the definition for which it will act as the default value.

If the request value matches a value that is specified in the definition, then the

meaning for that value will display in the trace field; otherwise, the FormatValue

default definition will be used. The following examples are taken from the sample

printer.req file. In the first example, from the GET_DEVICE_ID request definition,

there is no specified format for the default value of wValue:

wValue={

Depends(bmRequestType)={

0xA1={

FormatValue=Configuration Index is 0x%04X

}

Therefore, the default, unformatted trace output for the wValue field displays as

such:

However, when FormatValue is used to control its appearance, as in the

following example,

wValue={

Depends(bmRequestType)={

0xA1={

FormatValue=Configuration Index is 0x%04X

}

FormatValue=GET_DEVICE_ID default is %d

}

Figure 4: Resulting trace output for the altered FormatValue

definition

Figure 5: Default trace

output with no formatting

specifications

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Teledyne-lecroy USB File Based Decode Manual Manual de usuario Pagina 13