boards/nxp/lpcxpresso55s28/doc/index.rst
.. zephyr:board:: lpcxpresso55s28
Overview
The LPCXpresso55S28 development board provides the ideal platform for evaluation of and development with the LPC552x/S2x MCU based on the Arm® Cortex®-M33 architecture. The board includes a high-performance onboard debug probe, audio subsystem and accelerometer, with several options for adding off-the-shelf add-on boards for networking, sensors, displays, and other interfaces.
Hardware
For more information about the LPC55S28 SoC and LPCXPresso55S28 board, see:
LPC55S28 SoC Website_LPC55S28 Datasheet_LPC55S28 User Manual_LPCXpresso55S28 Website_LPCXpresso55S28 User Manual_LPCXpresso55S28 Development Board Design Files_.. zephyr:board-supported-hw::
.. note::
For additional features not yet supported, please also refer to the
:zephyr:board:lpcxpresso55s69 , which is the superset board in NXP's LPC55xx series.
NXP prioritizes enabling the superset board with NXP's Full Platform Support for
Zephyr. Therefore, the lpcxpresso55s69 board may have additional features
already supported, which can also be re-used on this board.
The LPC55S28 SoC has IOCON registers, which can be used to configure the functionality of a pin.
+---------+-----------------+----------------------------+ | Name | Function | Usage | +=========+=================+============================+ | PIO0_26 | SPI | SPI MOSI | +---------+-----------------+----------------------------+ | PIO0_29 | USART | USART RX | +---------+-----------------+----------------------------+ | PIO0_30 | USART | USART TX | +---------+-----------------+----------------------------+ | PIO1_1 | SPI | SPI SSEL | +---------+-----------------+----------------------------+ | PIO1_2 | SPI | SPI SCK | +---------+-----------------+----------------------------+ | PIO1_3 | SPI | SPI MISO | +---------+-----------------+----------------------------+ | PIO1_4 | GPIO | RED LED | +---------+-----------------+----------------------------+ | PIO1_6 | GPIO | BLUE_LED | +---------+-----------------+----------------------------+ | PIO1_7 | GPIO | GREEN LED | +---------+-----------------+----------------------------+ | PIO1_20 | I2C | I2C SCL | +---------+-----------------+----------------------------+ | PIO1_21 | I2C | I2C SDA | +---------+-----------------+----------------------------+
The LPC55S28 SoC is configured to use PLL1 clocked from the external 24MHz crystal, running at 144MHz as a source for the system clock. When the flash controller is enabled, the core clock will be reduced to 96MHz. The application may reconfigure clocks after initialization, provided that the core clock is always set to 96MHz when flash programming operations are performed.
The LPC55S28 SoC has 8 FLEXCOMM interfaces for serial communication. One is configured as USART for the console and the remaining are not used.
Programming and Debugging
.. zephyr:board-supported-runners::
Build and flash applications as usual (see :ref:build_an_application
and :ref:application_run for more details).
LinkServer is the default runner for this board.
A debug probe is used for both flashing and debugging the board. This board is
configured by default to use the integrated :ref:mcu-link-onboard-debug-probe
in the CMSIS-DAP mode. To use this probe with Zephyr, you need to install the
:ref:linkserver-debug-host-tools and make sure they are in your search path.
Refer to the detailed overview about :ref:application_debugging for additional
information.
The integrated MCU-Link hardware can also be used as a J-Link probe with a
firmware update, as described in :ref:mcu-link-jlink-onboard-debug-probe.
The :ref:jlink-debug-host-tools should be available in this case.
Connect a USB cable from your PC to P6, and use the serial terminal of your choice (minicom, putty, etc.) with the following settings:
Here is an example for the :zephyr:code-sample:hello_world application.
.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: lpcxpresso55s28 :goals: flash
Open a serial terminal, reset the board (press the RESET button), and you should see the following message in the terminal:
.. code-block:: console
***** Booting Zephyr OS v2.4.0 ***** Hello World! lpcxpresso55s28
Here is an example for the :zephyr:code-sample:hello_world application.
.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: lpcxpresso55s28 :goals: debug
Open a serial terminal, step through the application in your debugger, and you should see the following message in the terminal:
.. code-block:: console
***** Booting Zephyr OS zephyr-v2.4.0 ***** Hello World! lpcxpresso55s28
.. include:: ../../common/board-footer.rst.inc
.. _LPC55S28 SoC Website: https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/lpc5500-cortex-m33/lpc552x-s2x-mainstream-arm-cortex-m33-based-microcontroller-family:LPC552x-S2x
.. _LPC55S28 Datasheet: https://www.nxp.com/docs/en/nxp/data-sheets/LPC55S2x_LPC552x_DS.pdf
.. _LPC55S28 User Manual: https://www.nxp.com/webapp/Download?colCode=UM11126
.. _LPCxpresso55S28 Website: https://www.nxp.com/design/software/development-software/lpcxpresso55s28-development-board:LPC55S28-EVK
.. _LPCXpresso55S28 User Manual: https://www.nxp.com/webapp/Download?colCode=UM11158
.. _LPCXpresso55S28 Development Board Design Files: https://www.nxp.com/webapp/Download?colCode=LPCXpresso55S69-DS