ARM Technical Support Knowledge Articles

USB DONGLE NOT RECOGNIZED

Applies to: C51 C Compiler

Answer


Information in this article applies to:


PROBLEM

An LPT dongle works on a PC, but a USB dongle does not. The latest Sentinel drivers for the USB dongle are installed, but µVision still displays

warning C500: MISSING DEVICE (SECURITY KEY NOT FOUND)

when the project builds. Windows Device Manager shows the correct USB device. What could be wrong?

CAUSE

Installing a Serial Number or an Add-on Disk designed for LPT dongles will cause this warning. USB dongles require a different Serial Number and Add-on Disk than LPT dongles.

RESOLUTION

Install the Keil tools using the Serial Number and Add-on Disk supplied with the USB dongle.

If you are changing from an LPT dongle to a USB dongle on the same PC, you may either:

MORE INFORMATION

Article last edited on: 2007-01-12 13:26:23

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