topic Re: FRDM-KL05Z cannot be recognized by computer in Kinetis Microcontrollers

FRDM-KL05Z cannot be recognized by computer

zz642040273 — Thu, 15 Apr 2021 16:09:07 GMT

I used Win10 with a new FRDM-KL05Z, after I install the PEMicro driver and connect the board.

The board can be recognized as openSDA -CDC serial Port and and it appeared as a disk named KL05Z or bootloader. However, I cannot open it or drag anything into it.

After a moment the driver disappeared and the PEMicro openSDA device disappeared and becomes Unknown USB device with code 43.

Anyone can help me on this?

Re: FRDM-KL05Z cannot be recognized by computer

nxf56274 — Fri, 16 Apr 2021 02:29:54 GMT

Hi,

Hold the reset and then power on. Do you see the disk named 'bootloader'? Then try to download the pemiro firmware and drag it to the disk.

Have a great day,
TIC

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Re: FRDM-KL05Z cannot be recognized by computer

zz642040273 — Fri, 16 Apr 2021 03:50:27 GMT

Hi,

Thanks for your reply.

However, when I plugged with bootloader mode, the same happened and I cannot drag anything into it and later on it became unrecognized:(

Best,

Re: FRDM-KL05Z cannot be recognized by computer

nxf56274 — Fri, 16 Apr 2021 05:31:56 GMT

Hi,

The final method is update your bootloader and firmware. You need an external jlink debugger. And follow the attachment.

Have a great day,
TIC

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Re: FRDM-KL05Z cannot be recognized by computer

zz642040273 — Fri, 16 Apr 2021 06:11:58 GMT

Thank you very much!

However, I would like to know is this the fault of the bootloader and firmware of this board itself or all KL05Z board? In other word, may this be fixed if i buy a new board?

Also, How do I connect Jlink with KL05Z?

Re: FRDM-KL05Z cannot be recognized by computer

nxf56274 — Fri, 16 Apr 2021 07:39:39 GMT

Hi,

The firmware of PE always generate many problems. So we do not use it in common.

Have a great day,
TIC

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Re: FRDM-KL05Z cannot be recognized by computer

zz642040273 — Fri, 16 Apr 2021 12:52:03 GMT

So what we normally used and is there any other approach to fix the problem?

Re: FRDM-KL05Z cannot be recognized by computer

nxf56274 — Mon, 19 Apr 2021 01:35:42 GMT

Hi,

Updating the bootloader is the only way to fix the problem. We use jlink and daplink firmware. They are more stable than PE mirco.

Have a great day,
TIC

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Re: FRDM-KL05Z cannot be recognized by computer

zz642040273 — Mon, 19 Apr 2021 06:34:40 GMT

Thanks!

So, If I don't use the PEMicro firmare, do i need to install the PE drive?

And if I use DAPLINK firmware, do I need to install any other driver?

Best,

Zheng

Re: FRDM-KL05Z cannot be recognized by computer

nxf56274 — Tue, 20 Apr 2021 01:30:27 GMT

Hi,

Both firmware need the driver. I suggest you use jlink firmware.

Have a great day,
TIC

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Re: FRDM-KL05Z cannot be recognized by computer

zz642040273 — Tue, 27 Apr 2021 16:11:24 GMT

Problem fixed.

Install a Win7 virtual machine and connect the board to your computer. Win7 virtual machine are able to recognize the board.

Update the bootloader and firmware to the newest version from http://www.pemicro.com/opensda/. Then the Win10 host OS are able to recognize the board.