Finn dR

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11 years, 10 months ago.

Trouble connecting Freescale KL25Z to PC

I recently bought the Freescale KL25Z and I am having trouble connecting it to my PC (Windows 8.1, x64).

When I connect the device to my PC ("SDA" USB connector), it appears as FRMD-KL25Z with no files in it. I was only able to make the device appear as BOOTLOADER when pushing the reset button while plugging the device in my PC.

Trying to fix this, I downloaded the driver software from PEMicro. This made the yellow sign in my device manager disappear but did not change any other thing.

Then I tried to update the firmware according to the instructions on the website. After this the status LED would not flicker when plugging in the device. I was still able to open the BOOTLOADER with the status LED flickering.

I tried these steps on different USB ports on different laptops with different cables and have no idea why it is not working.

Thanks.

Just to be aligned, download the mbed firmware from http://mbed.org/handbook/Firmware-FRDM-KL25Z. The drive should be named "MBED". Report back if this helps or not.

I believe this firmware was updated few hours ago, to be compatible with windows 8.1.

Regards,
0xc0170

posted by Martin Kojtal 27 Nov 2013

I did, nothing has changed. After, I also tried updating the firmware with the file from http://coocox.org (using the disc in the box) and with the file from pemicro.com (using the SDA_INFO.HTM on the device in BOOTLOADER). Now the device always appears as BOOTLOADER even if I do not hold the reset button. However, I can see the files in BOOTLOADER now on my Windows 8.1 x64 PC.

posted by Finn dR 27 Nov 2013

1 Answer

Finn dR
poster
11 years, 10 months ago.

Solved! I do not know exactly how but I think it has something to do with Windows 8 and Windows 8.1. After I updated the firmware again according to this website it worked on Windows 8, on Windows 8.1 the BOOTLOADER loop started again.

So I suggest if you are having problems the same kind of problems:

1. Update firmware according to mbed.org 2. Update firmware according to coocox.org 3. Update firmware according to pemicro.org

4. Update firmware, on a Windows 8.0 machine, according to mbed.org.

This seems silly but starting with step four did not work for me.