This is the documentation for the latest (master) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

NXP LPCXpresso11U68

Overview

The LPCXpresso11u68 development board uses an NXP LPC11U68 MCU based on an ARM Cortex-M0+ core.

LPCXpresso11U68

Hardware

The LPCxpresso 11U68 board provides the following hardware components:

  • LPC11U68 microcontroller in LQFP100 package

  • ARM Cortex-M0+

  • Memory:

    • 256KB of flash memory

    • 32KB of SRAM

    • 2x2KB of additional SRAM

    • 4 KB EEPROM

  • USB:

    • USB 2.0 Full-Speed device controller

  • DMA controller

  • 5x USART

  • 2x I2C

  • 2x SSP with DMA support

  • Board power supply: through USB bus or external power supply (3V and 5V)

  • Arduino connectors compatible with the ‘Arduino UNO’ platform

  • Tri-color user LED, Power On Led, Reset LED

  • Three push buttons: target reset, ISP and user

More information can be found here:

Supported Features

The lpcxpresso11U68 supports the following features:

Interface

Controller

Driver/Component

NVIC

on-chip

nested vector interrupt controller

SYSTICK

on-chip

systick

IOCON

on-chip

pinmux

CLOCK

on-chip

clock and reset control

GPIO

on-chip

gpio

I2C

on-chip

i2c master/slave controller

UART

on-chip

serial port-polling; serial port interrupt

EEPROM

on-chip

eeprom

Other hardware is not yet supported on Zephyr.

Connections and IOs

The IOCON controller can be used to configure the LPC11U68 pins.

Name

Function

Usage

PIO2_11

UART

USART RX

PIO2_12

UART

USART TX

PIO2_16

GPIO

GREEN LED

PIO2_17

GPIO

RED LED

PIO2_18

GPIO

BLUE_LED

PIO0_4

I2C

I2C SCL

PIO0_5

I2C

I2C SDA

Programming and Debugging

Flashing

The LPCXpresso11U68 board can be flashed by using the on-board LPC-Link2 debug probe (based on a NXP LPC43xx MCU). This MCU provides either a CMSIS-DAP or a J-Link interface. It depends on the embedded firmware image. The default OpenOCD configuration supports the the CMSIS-DAP interface. If you want to switch to J-Link, then you need to edit the boards/arm/lpcxpresso11u68/support/openocd.cfg file and to replace:

source [find interface/cmsis-dap.cfg]

with:

source [find interface/jlink.cfg]

Note

The firmware image of the LPC-Link2 can be updated using the LPCScrypt tool.

Note

The Mbed project also provides some firmware images here. In addition to a CMSIS-DAP interface, they also provide a convenient update mechanism through a pseudo USB disk.

Here are the steps to flash a firmware you built into a LPCXpresso11U68 board:

  1. Connect the “Link” micro-B USB port to your host computer.

  2. Next, simply run the west flash command

Debugging

Please refer to the Flashing section and run the west debug command instead of west flash.