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Connected LaunchPad usb_dev_cserial example does not work on Windows XP

Dan K
Expert 1210 points
Other Parts Discussed in Thread: EK-TM4C1294XL

FYI,

For anyone running Windows XP SP2, the EK-TM4C1294XL Connected LaunchPad example usb_dev_cserial will fail to properly start the second virtual COM port "TivaWare USB Serial Command Port" with "This device cannot start. (Code 10)" in Windows Device Manager. The result is that data can be transferred between the virtual COM port associated with the ICDI (Stellaris Virtual Serial Port) and the first application virtual COM port (TivaWare USB Serial Port), but the second command interface virtual COM port is not accessible.

Thanks to info on Jan Axelson's Serial Port Central web site, under the USB virtual COM ports - Composite CDC devices, this problem can be easily solved. A Microsoft HotFix #918365 is available to update the Microsoft  usbser.sys USB driver.

After installing this HotFix to replace the old usbser.sys, the example works correctly.