Martin Benson

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8 years ago.

NXP K64F USB Port Disconnects and Reconnects constantly

Hi total newby - hobbyist here. Just getting started and I find that the USB COM Port that I have the board attached disconnects and reconnects spontaneously. When I attempt to send a file over to the board, it will drop the connection immediately. Not getting very far.

Details: Win 10 HP Elitebook 8460p I installed the latest driver from this site. I have a bluetooth keyboard and mouse running in one USB port. I unplugged the Bluetooth dongle and behavior is still the same.

I've got $99 US in this and can do nothing with it.

Hi Martin,

Does this disconnection only happen when you flash a new binary to the device?

Best Regards,

Andrea, team mbed

posted by Andrea Corrado 24 Oct 2016

HI Andrea. Thanks.

No it happens for no reason at all, too. I just wonder if I need a better USB driver. I had a similar issue before with my Arduino, and as I recall I updated the driver and it worked. Now I'm not sure what driver to use.

I will try again tonight. Meanwhile, have you heard of a similar problem? Communication with the board drops repeatedly, sometimes several times a minute.

posted by Martin Benson 24 Oct 2016

OK, it seems to be working now. Yesterday, when I was working with it, the board showed up as MBED in my drives. This evening, I restarted the laptop and plugged the board back in, and it said BOOTLOADER. So, I followed the procedure to get the OS into the device and seems to working fine now. I ran the lab in the getting started guide and had TerraTerm communication and the program ran. I could see the board communicating with the cloud and the RGB LED changed color.

So, I am all set for now, but I am sure that I will be back! Thanks for your response. You got back to me very quickly.

posted by Martin Benson 25 Oct 2016

Hi Martin,

If you run into more trouble send me an email at support@mbed.org, be glad to help :)

Regards,

Andrea, team mbed

posted by Andrea Corrado 25 Oct 2016
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