.. zephyr:board:: holyiot_yj17095

Overview

The Holyiot_ YJ-17095 hardware features 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 does not contain peripherals for direct physical interaction, but it has an on-board 2.4 GHz antenna for Bluetooth Low Energy (BLE) communication. There are 11 GPIO pins accessible via solder pads on the board, in addition to pins for power supply and SWD programming. The Nordic Semiconductor Infocenter_ contains the processor's information and the datasheet. The boards measures 9.4mm by 9.25mm.

Hardware

The nRF52832 of the Holyiot YJ-17095 is clocked by an external crystal with a frequency of 32 MHz.

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

.. figure:: img/pcb_back_gpio.webp :align: center :width: 60% :alt: Holyiot YJ-17095 PCB

 Holyiot YJ-17095 PCB and pin out (Credit: Holyiot)

Programming and Debugging

.. zephyr:board-supported-runners::

The boards can be programmed and debugged using an external programming and debugging tool, such as a Segger J-Link (see :ref:build_an_application and :ref:application_run for more details).

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

• VTref = VDD
• GND = GND
• SWDIO = SWDIO
• SWCLK = SWCLK

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. Since there is not LED mounted on the PCB the toggling GPIO can be measured on P0.29 with a multimeter or an oscilloscope.

.. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: holyiot_yj17095 :goals: build flash

Debugging

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

Testing Bluetooth Low Energy (BLE) connectivity

The easiest way to test the Bluetooth Low Energy (BLE) connectivity of the board is to build and flash the :zephyr:code-sample:ble_periodic_adv application.

.. zephyr-app-commands:: :zephyr-app: samples/bluetooth/periodic_adv :board: holyiot_yj17095 :goals: build flash

References

.. target-notes::

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