Teledyne LeCroy USB Chief - File Based Decode Manual - Manual (Page 22)

18
C OMPUTER A CCESS T ECHNOLOGY C ORPORATION USB R EQUEST D EFINITION (. REQ ) F ILES
Reference Manual
Left-click on the Control field heading to access the Decode...Request command on
the context menu. Selecting the Decode...Request command opens the decoding
dialog window. For more information about displaying descriptor information,
please see USB Descriptor Definition (.dsc) Files on page 25.
Endian
Use Endian to specify whether bytes should be presented in little-endian or big-
endian order.
Bytes(2,3)={
Endian=Big
Name=Hub Change bits
Bitmap={
0=C_HUB_LOCAL_POWER
1=C_HUB_OVER_CURRENT
}
}
Alternatively, the Endian value could be set to Little , which is the default
value.
HIBYTE
Use HIBYTE in conjunction with LOBYTE in order to display both values in 2-byte
wValue and wIndex fields. HIBYTE refers to the Most Significant Byte. Here is an
example of its use:
wValue={
HIBYTE={
FormatValue=Cheese %d
}
LOBYTE={
FormatValue=, sliced %d
}
}
Here is sample output for the example when wValue equals 0x0102 :
Length
Use Length to represent the length, in bytes, of the data to be decoded. A numeric
value may be used:
Figure 10: HIBYTE and
LOBYTE values displayed