The Test Automation Suite tool, which is well know for providing engineers with an array of PCI SIG approved automated tests, can be used to automate customised device testing when used in conjunction with the Verification script Engine. The Verification Script Engine tool, which is included as part of Teledyne LeCroy PCI Express protocol analyser, provides a PCI Express protocol aware environment for the development and running of verification scripts.
Teledyne LeCroy supply two very powerful tools for verifying the operation of the PCI Express bus and automating the trigger conditions and analysis of captured traces.
Identifying issues which are not directly protocol related can be very time consuming and require a considerable knowledge of PCI Express if performed by manually investigating a recorded trace. A host which is issuing a read command which is frequently receiving a Negative Acknowledged (NAK) response from a device is not in any way violating the PCI Express specification but is very likely to be having a large impact upon performance or the software function waiting for the response. The Teledyne LeCroy protocol software automatically checks for protocol logical and timing violations but many issues are related to the flow of data over the bus, or higher level protocols carried over PCIe, rather than a malfunction of the bus protocol itself. However much of this activity is undertaken in a manual fashion and knowledge gained in the debugging of an issue is not captured anywhere other than in the memory of the engineer who tackled the problem.
Teledyne LeCroy PCI Express protocol analysers enable engineers to observe the behaviour of the PCI Express Gen1, Gen2, Gen3 and Gen4 bus interfaces implemented in their designs and systems, allowing them to check the PCI Express bus is operating within specification and debug any issues which may arise.
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