David Cowan

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8 years, 10 months ago.

Problems with firmware on KL25Z

Hi,

Real problems trying to upgrade the firmware.

I plug in the board depressing the keyswitch and the thing looks like a drive called bootloader.

I copy the latest firmware across.

Unplug and replug the board without the button pressed.

And NOTHING. It isn't recognised by the PC and the lights don't flash... just sits there.

Done this on both windows 7 and 8 pcs.

Any suggestions???

Regards,

David Cowan

Question relating to:

Last updated: 30 Apr 2020
firmware, KL25z

Did you update the bootloader on the device? There is a note on the referenced paged about that.

posted by Sam Grove 05 Jun 2015

Should only be required to make it work under windows 8.1. And since you can't update it under windows 8.1 it is a bit useless.

For sure it is not going to work under windows 8.1, since afaik Freescale still ships them with old bootloader. Which latest firmware are you using?

posted by Erik - 05 Jun 2015

No, should I have??? It indicated that it was only relevant to Macs and Linux. Or am I missing something?? Thanks David Cowan

posted by David Cowan 05 Jun 2015

I think it is version 2.03. The one on this page.

posted by David Cowan 05 Jun 2015

1 Answer

Paul Staron
8 years, 10 months ago.

Had the same problem, try the original rev 0200 that was the only one that worked and still does on my board using win7.

Accepted Answer

That sounds hopeful. Where do you get the version 200??

posted by David Cowan 05 Jun 2015

https://developer.mbed.org/handbook/Firmware-FRDM-KL25Z

rev 0200 is at the bottom, click on the three dots in the brackets, save and extract the zip file then drop the 'mbed_if_v2.0_frdm_kl25z.s19' file onto your FRDM-KL25Z using windows explorer.

posted by Paul Staron 06 Jun 2015

Don't know how but I can now download all 3 versions from an old (200,201,203) from an old vista machine. It seems to enumerate OK on my Win8.1 as MBED OK and I can download a program. My problem now is that there is no sign of the COM port.. Any suggestions??

posted by David Cowan 06 Jun 2015

I use Windows 7 so not sure about 8.1

However make sure you have the latest windows serial port driver installed.

https://developer.mbed.org/handbook/Windows-serial-configuration

I would suggest to uninstall your existing driver first and start a fresh.

posted by Paul Staron 06 Jun 2015

Thanks That worked.

posted by David Cowan 06 Jun 2015