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Debugging SAM3S USB application with Keil ULink Pro

Marshall Seaborn

Please Help. How do you configure uVision4's debugging options to allow debug of a Cortex-M3 target USB communications based application?

Currently attempting to connect to the target fails when the debugger is running. This doesn't occur when the ULink Pro is not attached.

The target is an Atmel SAM3S2B device running FreeRTOS and the ASF CDC USB driver with the cdc_stdio utility. Communication works fine when disconnected from the debugger.

Thanks In Advance,
Marshall Seaborn

  • 0

    Can you describe your problem a bit better. When does the application program stop working? Are you actually starting the code using ULINK-pro?

    Your problem might be related to the fact that the board is powered via USB. Is this the case?