Teledyne-lecroy USB Script Decode Manual Uživatelský manuál stáhnout pdf (Strana 63)

CHAPTER 14

CATC Scripting Language for USB USB Decoders

UsbEndpType

Val ue s: “Bulk” or “Interrupt”. Used to distinguish transfer types of the

endpoints.

UsbEndpDir

Val ue s: “In” or “Out”. Used to distinguish the endpoint direction. Any

endpoint can provide 2 pipes: one in each direction.

UsbMaxPktSize

Value: The maximum packet size allowed for this endpoint/direction com-

bination. This will be used to help decode the file.

UsbMaxXferSize

Value: The maximum transfer size allowed for this endpoint/direction

combination. This will be used to help decode the file.

UsbMaxXferDecodeSize

Value: The maximum portion of the transfer size that will be examined for

possible decoding. If, for example, each transfer had a 25 byte header at

the beginning, this value could be used to improve the speed at which the

decoding occurs, since the software would only pass the first N bytes to the

decoding logic. In cases where there might be a trailer, the value would

have to be equal to the maximum transfer length to insure that the last bytes

would be examined.

UsbClassCode

Value: The value assigned by the USB IF for this particular Class. For

example, Mass Storage is 8 and the Hub Class is 9.

UsbSubClass

Value: If defined, it is specified by the Class Specification. For example,

the Mass Storage Class provides for SubClass 4 for UFI (USB Floppy

Interface) and SubClass 6 for Transparent SCSI.

UsbProtocol

Value: If defined, it is specified by the Class Specification. For example,

1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 89 90

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Teledyne-lecroy USB Script Decode Manual Uživatelský manuál Strana 63