Teledyne-lecroy USB File Based Decode Manual Manual do Utilizador descarregar pdf (Página 15)

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

Reference Manual

Bitmap

Use Bitmap to define the decoding of bit data in a data field. The Bitmap defi-

nition also specifies the output of bit data in the decoding dialog window. The

Bitmap entry allows each bit value to be identified by a text string in the decoded

data output.

Bitmap entries are formatted as follows:

Bitmap=

{

<Bit#>=<string>

...

}

This example is taken from the hub.req GET_STATUS definition.

Bytes(2,3)={

Endian=Little

Name=Port Change bits

Bitmap={

0=C_PORT_CONNECTION

1=C_PORT_ENABLE

2=C_PORT_SUSPEND

3=C_PORT_OVER_CURRENT

4=C_PORT_RESET

}

In the trace output, the decoded

data can be viewed by position-

ing the mouse cursor over the

Data field name. This action

causes the Data field's tool tip

window to be displayed. The

box contains details about the

data, including the decoded

bitmap information.

Figure 7: Data field pop-up information box

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