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.

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
CLOCK	on-chip	clock_control

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 Building an Application and Run an Application 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 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 J-Link Debug Host Tools and make sure they are in your search path.

Then follow the instructions in LPC-Link2 J-Link 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 Hello World application.

# From the root of the zephyr repository
west build -b lpcxpresso55s16_ns samples/hello_world
west flash

Open a serial terminal, reset the board (press the RESET button), and you should see the following message in the terminal:

***** Booting Zephyr OS v2.2.0 *****
Hello World! lpcxpresso55s16_ns

Debugging

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b lpcxpresso55s16 samples/hello_world
west debug

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

***** Booting Zephyr OS zephyr-v2.2.0 *****
Hello World! lpcxpresso55s16