Command line Make example project for nRF52 DK

[jwhitmore]

I'm trying to build the "blinky" example found in nRF5_SDK_15.3.0_59ac345/examples/peripheral/blinky/pca10040e/blank/armgcc

Actually the pca10040e directory contains 'blank' and 'mbr' directories, I just went with blank but I've no idea what the difference is and which I should be using. I went with 'blank' and tried a 'make' command. Everything compiled but the linker is missing a library. I've installed both the  nRF5_SDK_15.3.0 and s132 packages but searching my machine and there's no occurrences of either libc_nano* or libg_nano. I'm not sure if those libs are target, as in Nordic nRF52 specific or arm specific, in which case they should have been installed with my arm-none-eabi-gcc packages?

/usr/lib64/gcc/arm-none-eabi/7/ld: cannot find -lc_nano
/usr/lib64/gcc/arm-none-eabi/7/ld: cannot find -lg_nano
/usr/lib64/gcc/arm-none-eabi/7/ld: cannot find -lc_nano

So should I be making in 'blank' or 'mbr' and where should I install libs from?

[Vidar Berg]

Hi,

The library should be included in the toolchain. Did you download the toolchain from this site https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads? 

This is how I would set up the toolchain on Linux

1. Find the recommended toolchain release in the SDK release notes. Is GCC ARM Embedded 7.2018q2.update for SDK 15.3.0

2. Download the pre-compiled version from ARM and move the extracted toolchain directory to /usr/local/ so it matches the path set in nRF5_SDK_15.3.0_59ac345/components/toolchain/gcc/Makefile.posix

So should I be making in 'blank' or 'mbr' and where should I install libs from?

 Use "blank" if you intend to run the app without a bootloader. A typical memory layout with bootloader, app, and MBR would look like this: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/lib_bootloader.html?cp=5_1_3_5_0_7#lib_bootloader_memory 

[jwhitmore]

Oops, I already have the gcc toolchain for arm installed from the package manager on my linux distro. I'll use the one distributed with the SDK and try that.

Thanks for your help