Teledyne LeCroy USB Protocol Suite User Manual (Voyager_Advisor T3_Mercury) - Manual (Page 339)

USB Protocol Suite User Manual 339
Format of Traffic Generation Files Teledyne LeCroy Corporation
Packet Starting Keys
pid 8 bits (0‐
0xFF)
or
pid string Host Generation Only.
Use this as the first key of most packets sent by
the Host (Exception: Use frame= for SOF
packets).
The key should be assigned to a valid packet
identifier string per the USB specification:
SETUP, IN, OUT, DATA0, DATA1, ACK, PRE, PING,
SPLIT, DATA2, MDATA, EXT, or LPM.
Optionally, you may assign this key a raw eight
bit value to force an error condition.
Warning: If you specify PID=0xNN, you must
use raw_data=( ) to specify the rest of the
packet data, because the packet structure is
unknown.
expected_pid pid string Host Generation Only.
Use this as the PID key for packets which are
expected to be sent by the device.
In IntelliFrame mode, the generator waits until
this PID has completed before sending the next
generated packet or bus condition.
The key should be assigned to a valid packet
identifier string per the USB specification:
DATA0, DATA1, ACK, NAK, STALL, NYET, DATA2,
MDATA, EXT, or LPM.
The generator engine waits forever until this
expected_pid appears, so the user may have to
hand edit the file to achieve the desired results.
For example, if a NAK comes where the
expected_pid was a DATA1, the user should edit
the .utg file to move the pid=IN command to
later in the file by inserting some frame=AUTO
idle=TO_EOF pairs before it. This allows time for
the device to be ready for the IN.
If RETRY=TRUE for this address/endpoint, the
NAKs are ignored and the SOF's are generated
automatically until the expected PID occurs.
Key Code Format Description