.. zephyr:board:: lpcxpresso51u68

Overview

The LPCXpresso51u68 development board uses an NXP LPC51U68 MCU based on an ARM CORTEX-M0+ core.

Hardware

LPC51U68 M0+ running at up to 150 MHz
Memory
- 256KB of flash memory
- 96KB of SRAM
On-board high-speed USB based debug probe with CMSIS-DAP and J-Link protocol support, can debug the on-board LPC51U68 or an external target
External debug probe option
Tri-color LED, target reset, ISP & interrupt/user buttons for easy testing of software functionality
Expansion options based on Arduino UNO and PMOD™, plus additional expansion port pins
FTDI UART Connector

More information can be found here:

LPC51U68 SoC Website_
LPC51U68 Datasheet_

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

The IOCON controller can be used to configure the LPC51U68 pins.

+---------+-----------------+----------------------------+ | Name | Function | Usage | +=========+=================+============================+ | PIO0_0 | UART | USART RX | +---------+-----------------+----------------------------+ | PIO0_1 | UART | USART TX | +---------+-----------------+----------------------------+ | PIO1_10 | GPIO | GREEN LED | +---------+-----------------+----------------------------+ | PIO0_29 | GPIO | RED LED | +---------+-----------------+----------------------------+ | PIO1_9 | GPIO | BLUE_LED | +---------+-----------------+----------------------------+ | PIO0_25 | I2C | I2C SCL | +---------+-----------------+----------------------------+ | PIO0_26 | I2C | I2C SDA | +---------+-----------------+----------------------------+ | PIO0_18 | SPI | SPI MISO | +---------+-----------------+----------------------------+ | PIO0_19 | SPI | SPI SCK | +---------+-----------------+----------------------------+ | PIO0_20 | SPI | SPI MOSI | +---------+-----------------+----------------------------+ | PIO1_1 | SPI | SPI SSEL2 | +---------+-----------------+----------------------------+

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).

Configuring a Debug Probe

A debug probe is used for both flashing and debugging the board. This board is configured by default to use the LPC-Link2 CMSIS-DAP Onboard Debug Probe, however the :ref:pyocd-debug-host-tools do not support this probe so you must reconfigure the board for one of the following debug probes instead.

:ref:`lpclink2-jlink-onboard-debug-probe`

Install the :ref:jlink-debug-host-tools and make sure they are in your search path.

Follow the instructions in :ref:lpclink2-jlink-onboard-debug-probe to program the J-Link firmware.

Configuring a Console

Connect a USB to FTDI RX, TX & GND pins to P3 Connector.

Use the following settings with your serial terminal of choice (minicom, putty, etc.):

Speed: 115200
Data: 8 bits
Parity: None
Stop bits: 1

Flashing

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

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: lpcxpresso51u68 :goals: flash

.. code-block:: console

***** Booting Zephyr OS build zephyr-v2.6.0-934-g4c438c0c7d13 ***** Hello World! lpcxpresso51u68

Debugging

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

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: lpcxpresso51u68 :goals: debug

Open a serial terminal, step through the application in your debugger, and you should see the following message in the terminal: