• Getting a Compiler

    Andy Preston02/09/2020 at 19:45 0 comments

    I was a bit stuck where to get a cross-compiler for a while. In the ubuntu repositories, there's various native versions of GNAT for GCC 4,5,6,7 and 8 but there's also: https://launchpad.net/ubuntu/bionic/+package/gnat-8-arm-linux-gnueabi but I couldn't work out (and please tell me if you know) if this was to compile programs to run ON Linux or if it's that the compiler is hosted BY Linux.

    But then I found that I could just go to https://www.adacore.com/download/more and select "ARM ELF (hosted on linux64)" and download an installer that'll give me a nice, complete toolchain in ~/bin/gnat... and when I say a nice toolchain, it's even got a GCC that'll cross compile my first test from the previous log.

    My next step is either https://github.com/AdaCore/Ada_Drivers_Library or https://github.com/AdaCore/bb-runtimes . I hope it's the latter because I can't find any support for any of the actual hardware I'm using in the Ada Drivers Library. So I hope I'll get everything I need out of the Bare Board Runtimes.

  • Try Texane STLink Instead

    Andy Preston02/08/2020 at 17:22 1 comment

    I had some trouble getting OpenOCD working... I had errors on startup that weren't exactly "beginner friendly", so I thought I'd give Texane's stlink a try instead... bit of a pity because I was hoping to be able to use the same procedure for STM32 and SAMD... but anything will do to get me started.

    sudo apt-get install git build-essential libusb-1.0.0-dev cmake
    git clone https://github.com/texane/stlink.git
    cd stlink
    make release
    cd build/Release
    sudo make install
    sudo ldconfig -v

    I also need a nice chunk of example code. I'm probably pushing my luck to try any "exotic" languages at this point. Plain, boring C is what I'm after at this stage. blink-plain from istepaniuk/stm32-templates should be just what I'm looking for.

    git clone https://github.com/istepaniuk/stm32-templates.git
    cd stm32-templates/blink-plain/
    nano Makefile
    arm-none-eabi-objcopy -O ihex blink-plain.elf blink-plain.hex
    st-flash --format ihex write blink-plain.hex


  • Just getting anything working at all

    Andy Preston02/05/2020 at 10:30 0 comments

    I've never done any ARM Cortex development before... So the first step is probably to get a simple "blinky" working in C.

    I've got various boards earmarked for various project ideas.

    An Adafruit feather M4, a couple of "Blue Pills", and and STM32 Discovery that I got very cheap from E. Bay.

    The SMT32 Discovery... is to get me started, like Arduino got me started in the world of AVR.

    I've been lead to believe I would probably be better off using Open OCD for programming rather than ST Link because I'll be able to take that with me to the SAMDs as well.... and maybe to some other chips too?

    My first step, though, is to "build" an ARM toolchain.

    sudo apt-get install gcc-arm-none-eabi
    sudo apt-get install openocd

    (that was hard ;) )

    Right with two tools in my hands, and no idea what I'm doing, let's see if we can get a simple LED blinking?