.. zephyr:board:: holyiot_yj16019

Overview

The Holyiot_ YJ-16019 hardware provides support for the Nordic Semiconductor nRF52832 ARM Cortex-M4 CPU and the following devices:

CLOCK
FLASH
:abbr:GPIO (General Purpose Input Output)
:abbr:MPU (Memory Protection Unit)
:abbr:NVIC (Nested Vectored Interrupt Controller)
:abbr:PWM (Pulse Width Modulation)
RADIO (Bluetooth Low Energy)
:abbr:RTC (nRF RTC System Clock)
Segger RTT (RTT Console)
:abbr:WDT (Watchdog Timer)

The board is equipped with one LED, one push button, and is powered by a CR2032 coin cell. The Nordic Semiconductor Infocenter_ contains the processor's information and the datasheet.

Hardware

The nRF52832 of the Holyiot YJ-16019 is clocked by an external crystal with a frequency of 32 MHz (Y1). The 32.768 kHz crystal (Y2) shown on the board schematics is not mounted.

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

LED and push button

Push button = P0.28
LED = P0.29

Programming and Debugging

.. zephyr:board-supported-runners::

Applications for the holyiot_yj16019 board configuration can be built and flashed in the usual way (see :ref:build_an_application and :ref:application_run for more details); however, an external Segger J-Link is required since the board does not have any on-board debug IC.

The following pins of the Segger J-Link must be connected to the following test pads on the PCB (see image):

VTref = VCC
GND = GND
SWDIO = SDO
SWCLK = SCK

.. figure:: img/holyiot_yj16019_pcb.jpg :align: center :alt: Holyiot YJ-16019 PCB

 Holyiot YJ-16019 PCB (Credit: Holyiot)

Flashing

Follow the instructions in the :ref:nordic_segger page to install and configure all the necessary software. Further information can be found in :ref:nordic_segger_flashing. Then build and flash applications as usual (see :ref:build_an_application and :ref:application_run for more details).

Here is an example for the :zephyr:code-sample:blinky application.

.. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: holyiot_yj16019 :goals: build flash

Debugging

Refer to the :ref:nordic_segger page to learn about debugging Nordic nRF52x-based boards with a Segger debugger.

Testing the LED and button on the Holyiot YJ-16019

There are 2 samples that allow you to test that the button and LED on the board are working properly with Zephyr:

.. code-block:: console

samples/basic/blinky samples/basic/button

You can build and flash the examples to make sure Zephyr is running correctly on your board. The button and LED definitions can be found in :zephyr_file:boards/holyiot/yj16019/holyiot_yj16019.dts.

References

.. target-notes::

.. _Holyiot: http://www.holyiot.com .. _Nordic Semiconductor Infocenter: https://infocenter.nordicsemi.com