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    Teensy 4.0 and CMSIS + SDK

    I've written a post with a guide how to build and flash firmwares using the SDK and CMSIS on the Teensy 4.0 here: https://www.stupid-projects.com/using-nxp-sdk-with-teensy-4-0/ I can't edit my first post and title to add the information there and mark it as resolved.
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    Teensy 4.0 and CMSIS + SDK

    Thanks for your time Paul. As I've mentioned on my previous post I have it working now and I'll post the details. I haven't tested all the cmsis examples, but I don't see why the shouldn't work. If that's the case, then Teensy 4.0 is by far the cheapest and best dev board also for the official...
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    Teensy 4.0 and CMSIS + SDK

    Got it working. Eventually, it was much simpler than I thought. Actually the hint was Paul's description about the architecture and then I've made some assumptions that were actually true and now I can run the SDK examples using CMSIS e.t.c. I'll post a short guide later or maybe write a post...
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    Teensy 4.0 and CMSIS + SDK

    Thanks for the detailed answer Paul. That means then that I could use the SDK to build a firmware and then upload the hex. Therefore it seems that the external MCU is acting pretty much as an external JTAG/flasher and then it lets the main MCU boot from the flash. Can you please tell me if the...
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    Teensy 4.0 and CMSIS + SDK

    OK, I see. Then the bootloader is in the external MCU, which runs it's own dfu and handles the write to the spi flash and then pass the execution to an offset in there. Also the fuses are configured to boot only from there, I guess, which means I would have to desolder that MCU and blah blah...
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    Teensy 4.0 and CMSIS + SDK

    Hi all. I have a teensy 4.0 and I would like to use the NXP SDK (CMSIS peripheral access layer). I know that currently there's an external NOR flash that has a custom USB DFU-like bootloader. Normally there is a way to use the SDK to write a firmware for the board and overwrite the flash. I...
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