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Help with a FRDM-KL25Z file download problem?

Question asked by Charles Palmer on Mar 19, 2014
Latest reply on Mar 19, 2014 by Erich Styger

I am having trouble copying files to my FRDM-KL25Z boards. When it works a dialog box briefly appears saying "Copying 1 item" and the transfer is successful and the program starts running. In the failure mode the dialog box does not appear, the file name appears instantly in the FRDM-KL25Z Windows Explorer window, and the small LED associated with the OpenSDA interface flashes quickly - 7 or 8 flashes and a pause - repeatedly.


This behaviour is intermittent. I cannot see a pattern. I get the same result with several FRDM boards, with two laptops (both Windows 7). I have the latest PE Micro OpenSDA firmware loaded and the latest USB drivers on both machines.


I believe the FRDM-KL25Z hardware is working as (a) the boards always enumerate as FRDM-KL25Z disk drives, (b) I have no trouble updating OpenSDA firmware and (c) even if the download fails the previously loaded KL25Z

firmware continues to run.


It feels like a device driver fault or a USB fault, or perhaps a fault with the connection between the two processors on the FRDM board. Has anyone else seen this problem? How do I fix it? Help!