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.

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:

Supported Features

The lpcxpresso55s16 board configuration supports the hardware features listed below. For additional features not yet supported, please also refer to the NXP 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 lpcxpresso55s16 board:

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-polling; serial port-interrupt

SENSOR

off-chip

fxos8700 trigger

CLOCK

on-chip

clock_control

CAN

on-chip

canbus

RNG

on-chip

entropy; random

IAP

on-chip

flash programming

Other hardware features are not currently enabled.

Currently available targets for this board are:

  • lpcxpresso55s16

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

PIO1_22

CAN

CAN RXD

PIO1_27

CAN

CAN TXD

System Clock

The LPC55S16 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.

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 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

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