201 lines
5.6 KiB
ReStructuredText
201 lines
5.6 KiB
ReStructuredText
.. _iotdk:
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DesignWare(R) ARC(R) IoT Development Kit
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########################################
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Overview
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********
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The DesignWare(R) ARC(R) IoT Development Kit is a versatile platform that
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includes the necessary hardware and software to accelerate software
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development and debugging of sensor fusion, voice recognition, and face
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detection designs. The ARC IoT Development Kit includes a silicon
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implementation of the ARC Data Fusion IP Subsystem running at 144 MHz on
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SMIC's 55-nm ultra-low power process, and a rich set of peripherals commonly
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used in IoT designs such as USB, UART, SPI, I2C, PWM, SDIO, and ADCs.
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.. image:: ./iotdk.jpg
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:width: 442px
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:align: center
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:alt: DesignWare(R) ARC(R)IoT Development Kit (synopsys.com)
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For details about the board, see: `ARC IoT Development Kit
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(IoTDK) <https://www.synopsys.com/dw/ipdir.php?ds=arc_iot_development_kit>`__
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Hardware
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********
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For hardware feature details, refer to : `ARC IoT Development Kit
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<http://embarc.org/embarc_osp/doc/build/html/board/iotdk.html>`__
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Programming and Debugging
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*************************
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Required Hardware and Software
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==============================
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To use Zephyr RTOS applications on the IoT Development Kit board, a few
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additional pieces of hardware are required.
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* A micro USB cable provides power to the board; however, if the
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board is to run standalone, the universal switching power adaptor (110-240V
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AC to 5V DC), provided in the package, can be used to power the board.
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* :ref:`The Zephyr SDK <zephyr_sdk>`
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* Terminal emulator software for use with the USB-UART. Suggestion:
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`Putty Website`_.
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* (optional) A collection of Pmods, Arduino modules, or Mikro modules.
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See `Digilent Pmod Modules`_ or develop your custom interfaces to attach
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to the Pmod connector.
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Set up the ARC IoT Development Kit
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==================================
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To run Zephyr application on IoT Development Kit, you need to
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setup the board correctly.
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* Connect the digilent usb cable from your host to the board.
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* Connect the 5V DC power supply to your board (optional).
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Set up Zephyr Software
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======================
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Building Sample Applications
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==============================
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You can try many of the sample applications or tests, but let us discuss
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the one called :ref:`hello_world`.
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It is found in :zephyr_file:`samples/hello_world`.
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Configuring
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-----------
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You may need to write a prj_arc.conf file if the sample doesn't have one.
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Next, you can use the menuconfig rule to configure the target. By specifying
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``iotdk`` as the board configuration, you can select the ARC IoT Development
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Kit board support for Zephyr.
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.. zephyr-app-commands::
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:board: iotdk
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:zephyr-app: samples/hello_world
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:goals: menuconfig
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Building
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--------
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You can build an application in the usual way. Refer to
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:ref:`build_an_application` for more details. Here is an example for
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:ref:`hello_world`.
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.. zephyr-app-commands::
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:board: iotdk
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:zephyr-app: samples/hello_world
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:maybe-skip-config:
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:goals: build
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Connecting Serial Output
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=========================
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In the default configuration, Zephyr's IoT Development Kit images support
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serial output via the USB-UART on the board. To enable serial output:
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* Open a serial port emulator (i.e. on Linux minicom, putty, screen, etc)
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* Specify the tty driver name, for example, on Linux this may be
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:file:`/dev/ttyUSB0`
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* Set the communication settings to:
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========= =====
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Parameter Value
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========= =====
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Baud: 115200
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Data: 8 bits
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Parity: None
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Stopbits: 1
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========= =====
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Debugging
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==========
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Using the latest version of Zephyr SDK(>=0.9), you can debug and flash IoT
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Development Kit directly.
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One option is to build and debug the application using the usual
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Zephyr build system commands.
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.. zephyr-app-commands::
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:board: iotdk
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:app: <my app>
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:goals: debug
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At this point you can do your normal debug session. Set breakpoints and then
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'c' to continue into the program.
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The other option is to launch a debug server, as follows.
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.. zephyr-app-commands::
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:board: iotdk
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:app: <my app>
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:goals: debugserver
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Then connect to the debug server at the IoT Development Kit from a second
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console, from the build directory containing the output :file:`zephyr.elf`.
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.. code-block:: console
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$ cd <my app>
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$ $ZEPHYR_SDK_INSTALL_DIR/sysroots/x86_64-pokysdk-linux/usr/bin/ \
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arc-zephyr-elf/arc-zephyr-elf-gdb zephyr.elf
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(gdb) target remote localhost:3333
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(gdb) load
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(gdb) b main
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(gdb) c
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Flashing
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========
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If you just want to download the application to the IoT Development Kit's CCM
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and run, you can do so in the usual way.
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.. zephyr-app-commands::
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:board: iotdk
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:app: <my app>
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:goals: flash
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This command still uses openocd and gdb to load the application elf file to
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IoT Development Kit, but it will load the application and immediately run. If
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power is removed, the application will be lost since it wasn't written to flash.
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Most of the time you will not be flashing your program but will instead debug
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it using openocd and gdb. The program can be download via the USB cable into
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the code and data memories.
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When you are ready to deploy the program so that it boots up automatically on
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reset or power-up, you can follow the steps to place the program on SPI-FLASH
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or internal eFlash.
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For instructions on how to write your program to FLASH, refer to the
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documentation on the IoT Development Kit at the `embARC website`_.
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Release Notes
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*************
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References
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**********
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.. _embARC website: https://www.embarc.org
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.. _Designware ARC IoT Development Kit website: <https://www.synopsys.com/dw/ipdir.php?ds=arc_iot_development_kit>`_
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.. _Digilent Pmod Modules: http://store.digilentinc.com/pmod-modules
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.. _Putty website: http://www.putty.org
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