Ellisys USB Explorer 280, Руководство пользователя

Страница: 55 / 124

Link Layer Tests | 55 of 124
S
u
pe
rS
pe
ed
U
S
B
Ex
pl
o
re
r
2
8
0
Specification Reference
Section 7.3.4#2
7.5 Header Packet Framing Test
Test Summary
This test verifies that the PUT does not invalidate header packets having one symbol error in
the HPSTART framing. The Port Configuration transaction will be used for this purpose. Here
are the combinations to be tested:

ERR SHP SHP EPF (incorrect symbol is D0.0)

SHP ERR SHP EPF (incorrect symbol is D0.1)

SHP SHP ERR EPF (incorrect symbol is D0.2)

SHP SHP SHP ERR (incorrect symbol is D0.3)
Test Steps and Expected Results
1. Examiner executes steps as described in TD7.1 (Link Bring-Up Test), to bring the link to
U0, but transmits all Header Packets with an error in the first HPSTART symbol.
2. Repeat the above steps with an error in the second, third, and fourth HPSTART symbols.
The test passes if the exchanges are met, no timeout is detected, all packets
are successfully received by the PUT, all credits are restored and the link
stays in U0 for at least 50ms.
Specification Reference
Section 7.2.4.1.4#1
7.6 Data Payload Framing Test
Test Summary
This test verifies that the PUT does not invalidate data payload packets having a single-
character framing error in the DPPSTART and DPPEND framings.
When Examiner is configured as a Downstream Port it will place framing
errors on Setup DP Packets. When Examiner is configured as an Upstream
Port, it will reply to the Get Device Descriptor request with a DPP containing
framing errors. In this case, the Host will run the CV Link Test Stack in