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  • Case ID: 303804
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Compiled uart example does not work

mattia

Hello,

we are using the Bluetooth module BL651 which should be using the nrf52810 chip soldered on our custom board.
I followed the documentation installing the appropriate software and drivers(arm-gcc, Jlink, nrf connect for desktop and the nrfjprog) .
I tried flashing the UART compiled example via the nRF programmer and it worked, I tried the same with the command line tool and it worked as well.
What I tried doing next was to modify the main.c of the example and re-compile the project and flash it, but for some reason it does not work. Keep in mind that I just added a "printf" before another one.
I flashed both with the command line tool and with the nRF programmer and still no output on serial terminal nor on a logic state analyzer. I have tried removing the parts about UART flow control, I checked if the pins were correct and tried modifing the Makefile but with no luck.
I am compiling with arm-gcc installed on WSL and I am flashing with the nrfjprog installed on Windows OS. On final note at the installation of the drivers, there was a problem about a different version of the Jlink driver when opening nRF connect as a solution I installed the driver version that the program was expecting.
If someone has any ideas or can give me some suggestions and/or documentation I will really appreciate that.
Thank you in advance
Mattia Gianesini

Some specifications
OS: Windows 11
arm-gcc version:  10.2.1
Jlink version:    7.66a
Nordic SDK:       17.1.0

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  • 0

    Hi,

    First, it looks like you are getting into development with our products; nice!
    I should let you know that we have two SDKs. See the nRF Connect SDK and nRF5 SDK statement.

    I recommend the Nordic Developer Academy as an excellent place to start learning the nRF Connect SDK.

    If you need to use the nRF5 SDK, this is fine, but I recommend using the nRF Connect SDK if you are getting started.

     

    Let me know which SDK you want to use before I go on assisting in this case.

    Regards,
    Sigurd Hellesvik

    PS: You can use the terminal for working with the nRF Connect SDK if you prefer that (I do).

  • 0 in reply to Sigurd Hellesvik

    Hello,
    Thank you for your answer, I have followed the first lesson of the course explained and I was able to build and flash an example (peripheral_uart) but it still does not work.
    First of all it gives me problems when compiling if I use the default "prj.conf", saying that some content will not fit the FLASH and/or RAM section. So I did some research and I chose to use the
    "prj_minimal.conf", with this configuration the build completes and I am able to flash it. But however I see nothing on TeraTerm nor on the logic state analyzer. Right now I am out of ideas, could you
    please provide me with some additional help about my problems ?

    Thank you in advance
    Mattia Gianesini

    Some specifications
    OS: Windows 11
    arm-gcc version:  10.2.1
    Jlink version:    7.66a
    Nordic SDK:       17.1.0

  • 0 in reply to mattia

    Hi,

    If the peripheral_uart builds and flashes, that is a good start!
    The nRF52810 has limited flash and ram available, and therefore the prj_minimal.conf works.

    Try to install nRF Connect for Mobile and scan to see if you can see the device advertising over Bluetooth.

    Which zephyr "board name" are you building for?

    Do you have LEDs on your board?
    A blinky sample is more straightforward, and might be a better way to test if your setup works.

    Regards,
    Sigurd Hellesvik

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