.. _lpcxpresso55s16:

NXP LPCXpresso55S16
###################

Overview
********

The LPCXpresso55S16 board provides the ideal platform for evaluation
of the LPC55S1x/LPC551x MCU family, based on the Arm® Cortex®-M33
architecture. Arduino® UNO compatible shield connectors are included,
with additional expansion ports around the Arduino footprint, along
with a PMod/host interface port and MikroElektronika Click module
site.

.. image:: ./lpcxpresso55S16.jpg
   :width: 720px
   :align: center
   :alt: LPCXpresso55S16

Hardware
********

- LPC55S16 Arm® Cortex®-M33 microcontroller running at up to 150 MHz
- 256 KB flash and 96 KB SRAM on-chip
- LPC-Link2 debug high speed USB probe with VCOM port
- I2C and SPI USB bridging to the LPC device via LPC-Link2 probe
- MikroElektronika Click expansion option
- LPCXpresso expansion connectors compatible with Arduino UNO
- PMod compatible expansion / host connector
- Reset, ISP, wake, and user buttons for easy testing of software functionality
- Tri-color LED
- Full-speed USB device / host port
- High-speed USB device / host port
- UART header for external serial to USB cable
- CAN Transceiver
- Stereo audio codec with in/out line
- NXP FXOS8700CQ accelerometer

For more information about the LPC55S16 SoC and LPCXPresso55S16 board, see:

- `LPC55S16 SoC Website`_
- `LPC55S16 Datasheet`_
- `LPC55S16 User Manual`_
- `LPCXpresso55S16 Website`_
- `LPCXpresso55S16 User Manual`_
- `LPCXpresso55S16 Development Board Design Files`_

Supported Features
==================

The lpcxpresso55s16 board configuration supports the following
hardware features:

+-----------+------------+-------------------------------------+
| Interface | Controller | Driver/Component                    |
+===========+============+=====================================+
| NVIC      | on-chip    | nested vector interrupt controller  |
+-----------+------------+-------------------------------------+
| SYSTICK   | on-chip    | systick                             |
+-----------+------------+-------------------------------------+
| IOCON     | on-chip    | pinmux                              |
+-----------+------------+-------------------------------------+
| GPIO      | on-chip    | gpio                                |
+-----------+------------+-------------------------------------+
| I2C       | on-chip    | i2c                                 |
+-----------+------------+-------------------------------------+
| SPI       | on-chip    | spi                                 |
+-----------+------------+-------------------------------------+
| USART     | on-chip    | serial port                         |
+-----------+------------+-------------------------------------+
| SENSOR    | off-chip   | fxos8700 trigger                    |
+-----------+------------+-------------------------------------+

Other hardware features are not currently enabled.

Currently available targets for this board are:

- *lpcxpresso55s16_ns* non-secure (NS) address space

Connections and IOs
===================

The LPC55S16 SoC has IOCON registers, which can be used to configure
the functionality of a pin.

+---------+-----------------+----------------------------+
| Name    | Function        | Usage                      |
+=========+=================+============================+
| PIO0_5  | GPIO            | ISP SW4                    |
+---------+-----------------+----------------------------+
| PIO0_26 | SPI             | SPI MOSI                   |
+---------+-----------------+----------------------------+
| PIO0_29 | USART           | USART RX                   |
+---------+-----------------+----------------------------+
| PIO0_30 | USART           | USART TX                   |
+---------+-----------------+----------------------------+
| PIO1_1  | SPI             | SPI SSEL1                  |
+---------+-----------------+----------------------------+
| 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_9  | GPIO            | USR SW3                    |
+---------+-----------------+----------------------------+
| PIO1_18 | GPIO            | Wakeup SW1                 |
+---------+-----------------+----------------------------+
| PIO1_20 | I2C             | I2C SCL                    |
+---------+-----------------+----------------------------+
| PIO1_21 | I2C             | I2C SDA                    |
+---------+-----------------+----------------------------+
| PIO1_26 | GPIO            | FXOS8700 INT1              |
+---------+-----------------+----------------------------+

System Clock
============

The LPC55S16 SoC is configured to use the internal FRO at 96MHz as a
source for the system clock. Other sources for the system clock are
provided in the SOC, depending on your system requirements.

Serial Port
===========

The LPC55S16 SoC has 8 FLEXCOMM interfaces for serial
communication. One is configured as USART for the console, one is
configured for I2C, and the remaining are not used.

Programming and Debugging
*************************

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` does not yet
support the LPC55S16 so you must reconfigure the board for one of the
J-Link debug probe instead.

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

Then follow the instructions in
:ref:`lpclink2-jlink-onboard-debug-probe` to program the J-Link
firmware. Please make sure you have the latest firmware for this
board.

Configuring a Console
=====================

Connect a USB cable from your PC to J1 (LINK2), and use the serial
terminal of your choice (minicom, putty, etc.) with the following
settings:

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

Flashing
========

Here is an example for the :ref:`hello_world` application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: lpcxpresso55s16_ns
   :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 v2.2.0 *****
   Hello World! lpcxpresso55s16_ns

Debugging
=========

Here is an example for the :ref:`hello_world` application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: lpcxpresso55s16
   :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-v2.2.0 *****
   Hello World! lpcxpresso55s16

.. _LPC55S16 SoC Website:
   https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/lpc5500-cortex-m33/lpc551x-s1x-baseline-arm-cortex-m33-based-microcontroller-family:LPC551X-S1X

.. _LPC55S16 Datasheet:
    https://www.nxp.com/docs/en/nxp/data-sheets/LPC55S1x_PDS.pdf

.. _LPC55S16 User Manual:
   https://www.nxp.com/docs/en/nxp/user-guides/UM11295.pdf

.. _LPCxpresso55S16 Website:
   https://www.nxp.com/design/development-boards/lpcxpresso-boards/lpcxpresso55s16-development-board:LPC55S16-EVK

.. _LPCXpresso55S16 User Manual:
   https://www.nxp.com/docs/en/user-guide/UMLPCXPRESSO55S16.pdf

.. _LPCXpresso55S16 Development Board Design Files:
   https://www.nxp.com/downloads/en/design-support/LPCXPRESSSO55S16-DESIGN-FILES.zip