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Nordic nRF52x Support Files

This repository is a starting point and shared code for Nordic nRF52x BLE/Thread platforms. This repo is a collection of libraries, SDKs, Softdevices, and Makefiles to be included within other projects using the Nordic platfroms. Pull requests welcome.

The currently supported SDK versions are: 15.3.0, 16.0.0, and the SDK for Thread and Zigbee v3.2.0 and v4.0.0

The currently supported Softdevice versions are: s132_6.1.1, 7.0.1 and s140_6.1.1, 7.0.1

Support for nRF51x devices are deprecated and not maintained. The old version of this repository with support for nRF51x devices can be found in the legacy-nrf51x branch on the original nrf5x-base repo.

Usage

First, install git-lfs to properly download the CMSIS libraries. When adding the submodule, or cloning your project with an nrf52x-base submodule, you may need to navigate to nrf52x-base/lib/CMSIS_5/ and run git lfs pull.

Next, add this project as a submodule inside of your repo with your nRF5x code.

git submodule add https://github.com/lab11/nrf52x-base

Then write an application for the nRF5x SoC you are using and include a Makefile that looks like this:

PROJECT_NAME = $(shell basename "$(realpath ./)")

# Configurations
NRF_IC = nrf52832
SDK_VERSION = 15
SOFTDEVICE_MODEL = s132

# Source and header files
APP_HEADER_PATHS += .
APP_SOURCE_PATHS += .
APP_SOURCES = $(notdir $(wildcard ./*.c))

# Include board Makefile (if any)
#include $(NRF_BASE_DIR)/boards/<BOARD_NAME_HERE>

# Include main Makefile
NRF_BASE_DIR ?= ../../
include $(NRF_BASE_DIR)/make/AppMakefile.mk

Generally, the expected directory structure for your project is:

    /apps
        /<application 1>
        /<application 2>
        ...
    /src
        various platform-level code (e.g. functions shared between applications)
    /include
        various platform-level headers (e.g. platform pin mappings)
    /nrf5x-base (submodule)

Example Applications

This repo has several example and test applications. See the apps folder.

Flash an Application

To build and flash an application, there is some setup you must do.

Install the gcc-arm-none-eabi toolchain.

On Ubuntu:

 cd /tmp \
 && wget -c https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2020q2/gcc-arm-none-eabi-9-2020-q2-update-x86_64-linux.tar.bz2 \
 && tar xjf gcc-arm-none-eabi-9-2020-q2-update-x86_64-linux.tar.bz2 \
 && sudo mv gcc-arm-none-eabi-9-2020-q2-update /opt/gcc-arm-none-eabi-9-2020-q2-update \
 && rm gcc-arm-none-eabi-9-2020-q2-update-x86_64-linux.tar.bz2 \
 && sudo ln -s /opt/gcc-arm-none-eabi-9-2020-q2-update/bin/* /usr/local/bin/.

On MacOS:

 brew tap ArmMbed/homebrew-formulae
 brew install arm-none-eabi-gcc

Install the JLink software for your platform. You want the "Software and documentation pack". As of April 2020, some of the more recent JLink software is unstable on Linux. Version 6.34b has been verified to work reliably on Linux and MacOS.
Acquire a JLink JTAG programmer. The "EDU" edition works fine.
Program an app! With the JLink box attached to the target board:
```
 make flash
```
will write the app and softdevice to the device. You can erase a chip with:
```
 make erase-all
```
See the make folder for a complete list of commands.

Most of our boards use a TagConnect header instead of the way-too-large ARM JTAG header. We use our own adapter, but Segger also makes one.

Git Submodules

If you're using submodules in your project, you may want to use this to make git automatically update them: https://gist.github.com/brghena/fc4483a2df83c47660a5

Other Features

The build system supports generating protobuf *.c/*.h files with nanopb. To enable this, you must install the protobuf compiler protoc and build nanopb.

On Ubuntu:

sudo apt install python python3 libprotobuf-dev libprotoc-dev protobuf-compiler python3-protobuf

On Mac Os:

brew install protobuf

Build nanopb:

cd nrf52x-base/lib/nanopb/generator/proto
make

BLE Tools for Other Platforms

When developing a BLE application, several tools exist to make your life easier. The easiest option is nRF Connect: for Android and for iOS Alternatively, noble is a NodeJS library for interacting with BLE that can run from a Linux or Mac computer.

License

The files in this repository are licensed under the MIT License unless otherwise noted by the local directory's README and license files.