topic Re: MK20DX128VFM5 chip usage consultation in Kinetis Microcontrollers

MK20DX128VFM5 chip usage consultation

zhaofan123 — Fri, 30 Jun 2023 08:03:40 GMT

I am a newbie and have a lot of doubts, and I would very much like to get the help of your seniors.

I am using the MK20DX128VFM5 chip, and when I connect the computer directly through USB, the computer does not recognize any device, and when I press the reset button to enter, there is no phenomenon.

So I started measuring the REST-B pin of the chip, and I had applied it high, but the chip would force the signal low. When I change a chip that someone else has used, press and hold the reset button to enter, a high level signal appears on the REST-B pin, and the computer can recognize the device and display 'BOOTLOADER'.But when I drag the firmware, the device still doesn't respond.

What do I need to do to make my computer recognize the correct device and be able to refresh the program? I'm not sure if I overlooked some important steps during the operation.

Anyone who can provide answers or documentation would be appreciated.

Re: MK20DX128VFM5 chip usage consultation

ErichStyger — Fri, 30 Jun 2023 08:43:48 GMT

Hi @zhaofan123 ,

your device does not have a USB bootloader on it in the ROM. You need to program it first with an application running the USB stack.

I hope this helps,

Erich

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Fri, 30 Jun 2023 09:40:31 GMT

Thank you very much for your reply. I am using ADuCM3029 chip together. If I use programming, how should I operate it? Do you have any relevant technical manuals or process instructions? Because I have not covered these before and am still in the learning stage, I am not very familiar with this knowledge. I look forward to your reply.

Re: MK20DX128VFM5 chip usage consultation

ErichStyger — Fri, 30 Jun 2023 10:53:01 GMT

That K20DX128 is not supported by the NXP MCUXpresso SDK, so you would have to use the Kinetis Design Studio for it.

You might check some articles about it on my blog (https://mcuoneclipse.com), or check the examples I have posted on GitHub: https://github.com/ErichStyger/mcuoneclipse/tree/master/Examples/KDS/FRDM-K20D50M

I hope this helps,

Erich

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Fri, 30 Jun 2023 10:58:55 GMT

Thank you again for your reply. I will study and try.

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Thu, 06 Jul 2023 13:39:31 GMT

I've read a lot about it lately, including your blog, but I still don't know.

I use KDS and Keil together based on your blog. Finally, a .uvprojx file was generated in KDS and successfully opened in Keil.

But when I set it up, I can't find the device.

I've installed all kinds of software, but I still don't know how to program an empty chip. Would love to get your help very much, any response from you will improve the efficiency of my learning.

Also, I would like to state to you that I am unable to download the program in GitHub and that the program you posted appears to be for IAR use. Is this correct?

Re: MK20DX128VFM5 chip usage consultation

ErichStyger — Thu, 06 Jul 2023 13:59:07 GMT

I have not used IAR or Keil for years. But I'm using KDS for the K20DX128, and I suggest you use KDS for it.

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Thu, 06 Jul 2023 14:13:56 GMT

Glad to hear from you. As shown in the figure below, I am trying to use KDS now, when I create a new project and match my target chip, what should I continue to do?

Can you please tell me what to do next, or give me some links to learn?

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Thu, 06 Jul 2023 14:23:51 GMT

There is one more thing I would like to confirm with you. Is the USB bootloader for MK20DX128VFM5 chip the default? Or do I need to create different USB bootloaders based on different functional requirements?

Re: MK20DX128VFM5 chip usage consultation

ErichStyger — Fri, 07 Jul 2023 03:38:35 GMT

The K20 has no ROM bootloader. You need to implement one for your needs.

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Fri, 07 Jul 2023 05:04:30 GMT

Do you have any K20 programs available for KDS here? I would like to make some references and modifications.

Re: MK20DX128VFM5 chip usage consultation

ErichStyger — Fri, 07 Jul 2023 05:45:55 GMT

sure!

here you go:

https://github.com/ErichStyger/mcuoneclipse/tree/master/Examples/KDS/tinyK20

https://github.com/ErichStyger/mcuoneclipse/tree/master/Examples/KDS/FRDM-K20D50M

The tinyK20 board is basically a stripped down circuit from the FRDM boards, see

https://mcuoneclipse.com/2015/05/17/tinyk20-open-source-arm-debuguniversal-board-first-prototypes/

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Fri, 07 Jul 2023 08:31:57 GMT

I have one more question I would like to get your confirmation. When I load the bootloader for the K20, can I load it directly with USB? Or do I need to use the SWD interface to burn the program?

Re: MK20DX128VFM5 chip usage consultation

ErichStyger — Fri, 07 Jul 2023 08:51:51 GMT

You need initially a debug probe with SWD.

See for example https://mcuoneclipse.com/2018/03/03/flash-resident-usb-hid-bootloader-with-the-nxp-kinetis-k22-microcontroller/

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Fri, 07 Jul 2023 09:03:36 GMT

Where can I buy a debug probe with SWD? Can I trouble you to provide a link to this?

Re: MK20DX128VFM5 chip usage consultation

ErichStyger — Fri, 07 Jul 2023 09:08:20 GMT

For example the MCU-Link:

https://mcuoneclipse.com/2020/11/29/new-mcu-link-debug-probe-from-nxp/

Or the Pro version:

https://mcuoneclipse.com/2021/10/17/new-mcu-link-pro-debug-probe-with-energy-measurement/

You find them on Mouser/etc or directly from NXP.com

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Fri, 07 Jul 2023 09:14:30 GMT

If I want to use J-link for debugging, is this feasible?

Re: MK20DX128VFM5 chip usage consultation

ErichStyger — Fri, 07 Jul 2023 10:10:23 GMT

yes, of course.

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Sun, 09 Jul 2023 07:46:09 GMT

I found these links in the process of learning:
https://community.nxp.com/t5/University-Programs-Knowledge/uTasker-Bootloader-Porting-Guide/ta-p/1117231
https://www.utasker.com/kinetis/FRDM-K20D50M.html
Does this help me to burn the ROM bootloader?

Re: MK20DX128VFM5 chip usage consultation

zhaofan123 — Sun, 30 Jul 2023 07:49:32 GMT

Hello, I now get the USB bootloader for MK20 chip, but it is a hexadecimal file type. I have purchased MCU-Link, what software should I download to program the chip? Looking forward to hearing from you.