USB hub testing with MUTT devices
The goal of hub testing is to generate a complete set of possible traffic patterns from devices. You can test disconnect scenarios by adding an upstream SuperMUTT pack.
Hub testing prerequisites
Before you run the MUTT test commands at an elevated command prompt, make sure you meet the following requirements:
- The test system must be running the latest version of Windows 8.
- Set up and configure the MUTT device and install the firmware. For more information, see How to prepare the test system to run MUTT test tools.
Recommended hub tests
- USB IF electrical tests. All of our tests are protocol and state focused. See USB-IF Compliance Program for more information on electrical tests.
- MUTT stress and transfer tests included in the MUTT software package with MUTT devices connected in the suggested configurations for USB controllers. RunTest.bat runs both the stress and transfer tests. See How to run stress and transfer performance tests for MUTT devices.
- Device Fundamental test. For more information, see How to run devfund tests in Visual Studio for MUTT devices.
- Controller Windows Hardware Certification Kit tests. For more information, see USB-IF Certification Validation Test (Controller).
- Manual test cases for host controllers, as found in Windows Test Guidance document in the section.
Recommended topologies for hub testing with MUTT devices
- Attach MUTT devices to each available downstream port.
- Attach SuperMUTTs to half of the available ports. Attach MUTT devices to the remaining ports.
- Attach a SuperMutt Pack upstream of the hub under test and downstream ports have equal number of SuperMUTT and MUTT devices as shown in the following figure:
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