254 lines
9.0 KiB
ReStructuredText
254 lines
9.0 KiB
ReStructuredText
.. zephyr:board:: bt510
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Overview
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********
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The Sentrius™ BT510 Sensor is a battery powered, Bluetooth v5 Long Range integrated sensor that uses a Nordic Semiconductor nRF52840 ARM Cortex-M4F CPU.
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The sensor has the following features:
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* :abbr:`ADC (Analog to Digital Converter)`
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* CLOCK
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* FLASH
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* :abbr:`GPIO (General Purpose Input Output)`
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* :abbr:`I2C (Inter-Integrated Circuit)`
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* :abbr:`MPU (Memory Protection Unit)`
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* :abbr:`NVIC (Nested Vectored Interrupt Controller)`
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* :abbr:`PWM (Pulse Width Modulation)`
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* RADIO (Bluetooth Low Energy and 802.15.4)
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* :abbr:`RTC (nRF RTC System Clock)`
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* Segger RTT (RTT Console)
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* :abbr:`UART (Universal Asynchronous Receiver-Transmitter)`
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* :abbr:`WDT (Watchdog Timer)`
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.. figure:: img/bt510_back.jpg
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:align: center
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:alt: Sentrius BT510 Sensor, rear view
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Sentrius BT510 Sensor, rear view
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More information about the board can be found at the
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`Sentrius BT510 website`_.
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Hardware
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********
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Supported Features
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==================
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The BT510 Sensor supports the following
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hardware features:
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+-----------+------------+----------------------+
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| Interface | Controller | Driver/Component |
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+===========+============+======================+
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| ADC | on-chip | adc |
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+-----------+------------+----------------------+
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| CLOCK | on-chip | clock_control |
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+-----------+------------+----------------------+
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| FLASH | on-chip | flash |
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+-----------+------------+----------------------+
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| GPIO | on-chip | gpio |
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+-----------+------------+----------------------+
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| I2C(M) | on-chip | i2c |
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+-----------+------------+----------------------+
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| MPU | on-chip | arch/arm |
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+-----------+------------+----------------------+
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| NVIC | on-chip | arch/arm |
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+-----------+------------+----------------------+
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| PWM | on-chip | pwm |
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+-----------+------------+----------------------+
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| RADIO | on-chip | Bluetooth, |
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| | | ieee802154 |
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+-----------+------------+----------------------+
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| RTC | on-chip | system clock |
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+-----------+------------+----------------------+
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| RTT | Segger | console |
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+-----------+------------+----------------------+
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| UART | on-chip | serial |
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+-----------+------------+----------------------+
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| WDT | on-chip | watchdog |
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+-----------+------------+----------------------+
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Connections and IOs
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===================
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LED
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---
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Two LEDs are visible through the BT510 housing lid.
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* LED_1A (green) = P0.22
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* LED_1B (red) = P0.20
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Push button
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------------
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The BT510 housing lid also acts as a push button.
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* BUTTON_1 = SW1 = P1.10
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Magnetoresistive sensor
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-----------------------
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The BT510 incorporates a Honeywell SM351LT magnetoresistive sensor. Refer to the `Honeywell SM351LT datasheet`_ for further details.
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* MAG = P1.14
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Accelerometer
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-------------
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The BT510 incorporates an I2C ST Microelectronics LIS2DH accelerometer. Refer to the `ST Microelectronics LIS2DH datasheet`_ for further details.
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* SDA = P0.26
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* SCL = P0.27
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* INT_1 = P1.05
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* INT_2 = P1.12
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Temperature Sensor
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------------------
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The BT510 incorporates an I2C Silabs SI7055 temperature sensor. Refer to the `Silabs 7055 datasheet`_ for further details.
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* SDA = P0.26
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* SCL = P0.27
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Programming and Debugging
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*************************
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Applications for the ``bt510`` board configuration can be built, flashed, and
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debugged in the usual way. See :ref:`build_an_application` and
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:ref:`application_run` for more details on building and running.
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The BT510 features a TagConnect 10 way socket for connection of a
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programmer/debugger, refer to `TagConnect TC2050 product page`_
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for details of an appropriate TagConnect cable.
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A non-standard layout is used to include access to the sensor debug UART.
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+-----------+------------+----------------------+
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| Pin No. | Name | Description |
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+===========+============+======================+
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| 1 | Vcc | Power Supply, 3.3V |
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+-----------+------------+----------------------+
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| 2 | SWDIO | SWD Data |
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+-----------+------------+----------------------+
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| 3 | RXD | Debug UART RX Data |
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+-----------+------------+----------------------+
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| 4 | SWDCLK | SWD Clock |
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+-----------+------------+----------------------+
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| 5 | TM | Spare GPIO |
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+-----------+------------+----------------------+
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| 6 | SWO | SWD Output |
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+-----------+------------+----------------------+
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| 7 | N/C | Not Connected |
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+-----------+------------+----------------------+
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| 8 | TXD | Debug UART TX Data |
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+-----------+------------+----------------------+
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| 9 | GND | Ground |
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+-----------+------------+----------------------+
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| 10 | RESET | Reset, Active Low |
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+-----------+------------+----------------------+
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Connectivity to the programmer/debugger must be modified to match
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the pinout shown above.
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Ezurio provide the USB-SWD programming board (750-03239) that supports
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this connector layout, refer to the `USB SWD Programmer product page`_
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.
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Flashing
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========
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To connect the BT510 board for programming or debugging using the USB-SWD programming
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board, on the programming board set SW6 to the supply out position and SW5 to the 3V3
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position, ensure there is a jumper on J35 and that SW1 is in the debug position, then
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connect the BT510 to the board using the Tag-Connect cable via J3:
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.. figure:: img/bt510_prog.jpg
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:align: center
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:alt: Sentrius BT510 Sensor connected to programming board
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Sentrius BT510 Sensor connected to programming board
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Then build and flash applications as usual (see :ref:`build_an_application` and
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:ref:`application_run` for more details). For example, to flash:
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.. code-block:: console
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$ ninja flash
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Here is an example for the :zephyr:code-sample:`hello_world` application.
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First, run your favorite terminal program to listen for output.
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NOTE: On the BT510, the UART lines are at TTL levels and must be passed through
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an appropriate line driver circuit for translation to RS232 levels. Refer to the `MAX3232 datasheet`_
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for a suitable driver IC. The USB-SWD programming board has an in-built UART connected
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to the BT510 acting as a USB CDC port, on Linux and Windows 10 this driver should be
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installed automatically, for Windows 7, the MBED driver is required to use the serial
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port - see the `MBED Serial Driver`_ link for details and how to install the driver.
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.. code-block:: console
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$ minicom -D <tty_device> -b 115200
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Replace :code:`<tty_device>` with the port where the bt510 can be found. For example, under Linux, :code:`/dev/ttyACM0`.
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Then build and flash the application in the usual way.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: bt510
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:goals: build flash
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Note that an external debugger is required to perform application flashing.
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Debugging
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=========
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The ``bt510`` board does not have an on-board J-Link debug IC
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as some nRF5x development boards, however, instructions from the
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:ref:`nordic_segger` page also apply to this board, with the additional step
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of connecting an external debugger. The USB-SWD programmer board has a CMSIS debugger
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compatible interface and debugging can be performed using pyocd, openocd or any other
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applications that support the CMSIS interface.
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Testing Bluetooth on the BT510
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***********************************
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Many of the Bluetooth examples will work on the BT510.
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Try them out:
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* :zephyr:code-sample:`ble_peripheral`
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* :zephyr:code-sample:`bluetooth_eddystone`
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* :zephyr:code-sample:`bluetooth_ibeacon`
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Testing the LEDs and buttons on the BT510
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*****************************************
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There are 2 samples that allow you to test that the buttons (switches) and LEDs on
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the board are working properly with Zephyr:
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* :zephyr:code-sample:`blinky`
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* :zephyr:code-sample:`button`
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You can build and flash the examples to make sure Zephyr is running correctly on
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your board. The button, LED and sensor device definitions can be found in
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:zephyr_file:`boards/ezurio/bt510/bt510.dts`.
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References
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**********
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.. target-notes::
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.. _Sentrius BT510 website: https://www.ezurio.com/iot-devices/iot-sensors/bt510-bluetooth-5-long-range-ip67-multi-sensor
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.. _TagConnect TC2050 product page: https://www.tag-connect.com/product/tc2050-idc-050
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.. _USB SWD Programmer product page: https://www.ezurio.com/wireless-modules/programming-kits/usb-swd-programming-kit
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.. _MAX3232 datasheet: https://www.ti.com/lit/ds/symlink/max3232.pdf
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.. _Silabs 7055 datasheet: https://www.silabs.com/documents/public/data-sheets/Si7050-1-3-4-5-A20.pdf
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.. _ST Microelectronics LIS2DH datasheet: https://www.st.com/resource/en/datasheet/lis2dh.pdf
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.. _Honeywell SM351LT datasheet: https://sensing.honeywell.com/honeywell-sensing-nanopower-series-datasheet-50095501-c-en.pdf
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.. _MBED Serial Driver: https://os.mbed.com/docs/mbed-os/v6.8/program-setup/windows-serial-driver.html
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