MK66FX1M0VMD18

[pfl]

Hello,

willing to make my own teensy 3.6 board clone (based on MK66FX1M0VMD18), people in Teensy forum told me it needed a special ship to be programmed (which is proprietary)

why is it not ISP (or similar) programmable, why does it need an external bootloader ? is there no free/easy way to program the chip ?

regards

ps: I might not be in the right section, since it's really hard to figure in this forum

[Alexis_A]

Hello Phil,

This device are preprogrammed with the MCUBoot, a bootloader that can use UART, I2C, SPI to flash the MCU but this is not blocked so if you write over it, you will erase the bootloader. You will need to shift the program to the 0xA000 location if you don't want to erase the bootloader.

Check the following link to download the tools for program the MCU:

MCU Bootloader | NXP 

Let me know if this helps you.

Best Regards,

Alexis Andalon

[mjbcswitzerland]

Hi

The Teensy people also sell the adapter chip for the K66, but it is quite expensive: https://www.pjrc.com/store/ic_mkl02.html

You can also program a serial loader to the chip which allows multiple programming methods (KBOOT, UART SREC, iHEX, USB-MSD, SD card, Ethernet) - there is one available for the Teensy 3.6 here: http://www.utasker.com/kinetis/TEENSY_3.6.html

However this still gives no debugging support (the main disadvantage of Teensy and Arduino) apart from printf types. To improve this you can also use the debugger circuit from the FRDM-K66F board - it is a K20DX128 which will be cheaper than the Teensy boot loader chip and allows drag and drop programming via USB-MSD, real SWD programming/debugging and also USB-CDC to UART bridge.

It won't allow the Teensduino programming tool to be used, which the hobby users may not like so much since they will tend not be familiar with the other methods, but opens it up to more professional users. There is an open source version of the OpenSDA code that an be programmed to the K20.

Regards

Mark

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Kinetis K66:
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- http://www.utasker.com/kinetis/FRDM-K66F.html
- http://www.utasker.com/kinetis/TEENSY_3.6.html

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https://community.nxp.com/thread/512558
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https://community.nxp.com/thread/498809

[pfl]

- ok, but is there a bigger image? that one seems shrinked, even if I click on it

- now I have to program the MK 20 too?

- I usualy use AVRStudio to make my own ATtiny boards

   ->is there some equivalent ide that uses the openSDA library ?

[mjbcswitzerland]

Hi

You can get the complete diagram from the FRD-K66F schematics: https://www.nxp.com/downloads/en/schematics/FRDM-K66F-SCH.pdf

If you have difficulties to program the K20 you may need to accept that you will need the more expensive Teensy loader chip.

I think that DAPLink - on Github: https://github.com/ARMmbed/DAPLink is the open source project used for the openSDA loader. I don't think that you will have any luck with AVRstudio though.... But openSDA itself (or DAPLink), is supported in almost all IDEs (KDS, MCUXpresso, IAR, etc.)

Regards

Mark