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Type: Automated Test

Overview

The USB System Port Presence Test determines whether a system contains one or more USB root hubs or standard hubs. The system must contain at least one USB root hub and a total of two USB ports besides those that are used for a USB pointing device or USB keyboard. The test queries the system for USB root hubs through the USB software stack. The query determines whether there are at least two ports in the system besides the keyboard or pointing device ports and that they conform to the Windows Logo Program basic requirements. For mobile systems, one port is required.

Details

The test program queries each of the USB hubs through the USB software stack to determine how many ports are present in the system. The test software issues a Device GetDescriptor to get the device capabilities of the hubs. The following fields are returned and examined.

Offset	Field	Description
1	bDescriptorType	29h indicates a hub descriptor
2	bNbrPorts	Number of downstream ports that this hub supports
7	DeviceRemovable	Indicates if a port has a removable device attached

The test software then issues a GetPortStatus for each port that supports removable devices on the hubs in the system. The port should show the following bits in the status field.

Field	Value
PORT_CONNECTION	Not Connected
PORT_ENABLE	Not Enabled
PORT_SUSPEND	Not Suspended
PORT_OVER_CURRENT	No Overcurrent
PORT_RESET	No Reset
PORT_POWER	Powered On
PORT_LOW_SPEED	N/A

After this process is complete, you are asked to connect a device to each port that indicates it is available. If you cannot connect a device to any of these ports, it does not count towards the port requirement (2 ports for desktop and 1 for mobile).

Results Interpretation

The test transcribes all results to a text based log file.

The test fails if: 

• USB System Software does not load correctly and enable the host controllers.
• System does not support at least two (one on mobile) available downstream ports besides those used by USB keyboards and pointing devices. The following advisory information is provided as applicable.
• • Content of each hub descriptor.
  • Content of each port status descriptor.

Run Time: 5 minutes
Log File: 
System Restart Required: No
Test Category: 
Supported operating systems for "DFW" logo testing:
Windows Vista
Windows Server 2003
Windows XP
Program: 

Requirements

Software Requirements

The test tool runs on the following Windows operating systems:

• Windows Vista
• Windows Server 2003
• Windows XP
• Software components included with the device that is being tested.

Supported Software

Hardware Requirements

• Device to be tested
• Computer that meets the minimum software requirements
• Windows keyboard
• Two-button pointing device
• Color display monitor capable of at least 1024 by 768 resolution, 32-bits per pixel, 60 Hz
• Hard drive with a minimum of 20 GB available on partition C:
• Two USB devices. Only one USB device is required for mobile testing
• One USB 2.0 controller PCI adapter, if system does not contain a USB 2.0 controller
• x86
• x64
• Itanium
• Computer that meets the minimum software requirements
• Windows keyboard
• Two-button pointing device
• Color display monitor capable of at least 1024 by 768 resolution, 32-bits per pixel, 60 Hz
• Hard drive with a minimum of 20 GB available on partition C:
• Two USB devices. Only one USB device is required for mobile testing
• One USB 2.0 controller PCI adapter, if system does not contain a USB 2.0 controller
• x86
• x64
• Itanium
• Windows keyboard
• Two-button pointing device
• Color display monitor capable of at least 1024 by 768 resolution, 32-bits per pixel, 60 Hz
• Hard drive with a minimum of 20 GB available on partition C:
• Two USB devices. Only one USB device is required for mobile testing
• One USB 2.0 controller PCI adapter, if system does not contain a USB 2.0 controller
• x86
• x64
• Itanium
• Two-button pointing device
• Color display monitor capable of at least 1024 by 768 resolution, 32-bits per pixel, 60 Hz
• Hard drive with a minimum of 20 GB available on partition C:
• Two USB devices. Only one USB device is required for mobile testing
• One USB 2.0 controller PCI adapter, if system does not contain a USB 2.0 controller
• x86
• x64
• Itanium
• Color display monitor capable of at least 1024 by 768 resolution, 32-bits per pixel, 60 Hz
• Hard drive with a minimum of 20 GB available on partition C:
• Two USB devices. Only one USB device is required for mobile testing
• One USB 2.0 controller PCI adapter, if system does not contain a USB 2.0 controller
• x86
• x64
• Itanium
• Hard drive with a minimum of 20 GB available on partition C:
• Two USB devices. Only one USB device is required for mobile testing
• One USB 2.0 controller PCI adapter, if system does not contain a USB 2.0 controller
• x86
• x64
• Itanium
• Two USB devices. Only one USB device is required for mobile testing
• One USB 2.0 controller PCI adapter, if system does not contain a USB 2.0 controller
• x86
• x64
• Itanium
• One USB 2.0 controller PCI adapter, if system does not contain a USB 2.0 controller
• x86
• x64
• Itanium

• Processor

• x86
• x64
• Itanium
• x64
• Itanium
• Itanium

Running USB System Port Presence Test

Command Syntax

Command option	Description

Test Assertions