96b-nitrogen.rst

96Boards Nitrogen

Contents

• Overview
• Hardware
• Working with the board
  • Building an application
  • Flashing an application
    • Installing pyOCD
    • How to flash

Overview

Nitrogen, a compliant IoT Edition board provides economical and compact BLE solutions for various IoT projects. This board includes the below features:

• Nordic nRF52832 microcontroller
• 64 KB of RAM
• 512 KB on-board flash storage.

Nitrogen hardware supports the Nordic Semiconductor nRF52832 ARM Cortex-M4F CPU.

Hardware

• For detailed specifications, see Nitrogen product page on the 96Boards website.
• For hardware user manual, see Seeed wiki.
• For hardware schematics, see Seeed Document.

For more details on 96Boards Nitrogen, see Nitrogen product page.

Working with the board

Building an application

All Scenarios OS OS Zephyr flavour is based on Zephyr kernel.

• Source the environment with proper template settings, flavour being zephyr and target machine being 96b-nitrogen:

$ TEMPLATECONF=../sources/meta-ohos/flavours/zephyr . ./sources/poky/oe-init-build-env build-ohos-zephyr

• You will find yourself in the newly created build directory. Call bitbake to build the image. The supported image name is zephyr-philosophers.

$ MACHINE=96b-nitrogen bitbake zephyr-philosophers

MACHINE variable can be set up in conf/local.conf file under build directory or via command line.

Flashing an application

Installing pyOCD

pyOCD is an open source Python package for programming and debugging Arm Cortex-M microcontrollers using multiple supported types of USB debug probes. It is fully cross-platform, with support for Linux.

• The latest stable version of pyOCD can be installed via pip as follows:

$ pip install --pre -U pyOCD

• To install the latest pre-release version from the HEAD of the master branch, do the following:

$ pip install --pre -U git+https://github.com/mbedmicro/pyOCD.git

• To install directly from the source by cloning the git repository, do the following:

$ python setup.py install

• Verify that the board is detected by pyOCD by executing the command:

$ pyocd-flashtool -l

Note

When ValueError: The device has no langid error is displayed due to lack of permission, perform the instructions as suggested in https://github.com/pyocd/pyOCD/tree/master/udev.

How to flash

• To flash the image, execute the command used to build the image with -c flash_usb appended. For example, to flash the already built zephyr-philosophers image, do:

$ MACHINE=96b-nitrogen bitbake zephyr-philosophers -c flash_usb