OM13071,598 - NXP Semiconductors

UM10830

OM13071 LPCXpresso824-MAX Development board

Rev. 1 — 29 September 2014

User manual

Document informat ion

Info

Content

Keywords

OM13071, LPC82x, development board, mbed, ardui no

Abstract

This user manual describes the LPCXpresso824-MAX development

board.

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User manual

Rev. 1 — 29 September 2014

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Contact information

For more information, please visit:

http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Revision history

Rev

Date

Description

20140929

Initial version

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1. Introduction

The LPCXpresso-MAX family of boards provides a powerful and flexible development

system for NXP's low end Cortex-M0+ MCUs. They can be used with a range of

development tools, including the LPCXpresso IDE, in addition to ARM's mbed online

toolchain. The LPCXpresso824-MAX board is developed by NXP to enable evaluation of

and prototyping with the LPC82x family of MCUs. Fig 1 shows the LPCXpresso824-MAX

Board.

Fig 1. LPCXpresso824-MAX Board

1.1 Features

The LPCXpresso824-MAX board includes the following features:

• Compatible with LPCXpresso IDE, mbed, and other toolchains.

• On-board CMSIS-DAP (debug probe) with USB, bas e d on LPC11U35 MCU.

• Debug connector to allow debug of target MCU through an external probe.

• Tri-color LED.

• Target ISP and WAKE buttons.

• Target Reset button.

• Target pins available on ‘standard LPCXpresso/mbed’ expansion connector.

• Arduino connectors compatible with the “Arduino UNO” platform.

• Pmod® expansion header.

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• Prototyping area.

• Powering options from multiple sources.

• Options to allow measurement of current consumed by target MCU.

2. Board layout

The LPCXpresso824-MAX development board layout is shown in Fig 2.

Fig 2. LPCXpresso824-MAX development board layout

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2.1 Jumper settings

Jumpers on the LPCXpresso824-MAX board can be used to configure debug probe

selection (on-board vs off-board) or to measure power consumption as described in

sections 2.1.1 and 2.1.2.

2.1.1 JP1: on-board/off-board debug

When this jumper is open (default), the on-board debug probe (LPC11U35 device) is

used as the debug interface. The JP1 header is not fitted during manufacture of the

board. The debug probe boots from flash, enumerates as a CMSIS-DAP device, mbed

mass storage device, and mbed serial port. See section 5 for more details on the serial

port device.

When JP1 is closed (jumper fitted), the on-board debug probe is held in reset, and an

external debug probe can be connected using the P5 connector. The Reset button can

also be held down at board power-up to prevent the LPC11U35 booting up as a

CMSIS-DAP debug probe.

Note: The mbed serial device will not enumerate when using an external debug probe.

2.1.2 JP2: target current

The JP2 jumper is provided to enable supply current to the measuring board by placing

an ammeter in line with JP2 pins. By default, the solder jumper (SJ2) bypasses the JP2

jumper. Header P1 can be installed to measure supply power (across a 2.43 ohm resistor

on the board). Fig 3 shows a close up of the board in the area where SJ2 and P1 are

located. The IC below SJ2 is the LPC824.

Fig 3. Close up of board showing SJ2 and P1

See the schematic, available at http://www.lpcware.com/lpcxpresso-max-boards for more

information.

2.2 Buttons

The LPC824Xpresso-MAX has three push buttons available to control the operation of

the LPC824 (target) MCU. Their functions are described in sections 2.2.1, 2.2.2, and

2.2.3.

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2.2.1 Reset

This button is normally used to reset the LPC824. Holding down this button when the

board is powered-up also prevents the LPC11U35 from booting. See section 2.1.1.

2.2.2 ISP

The ISP button connects to the LPC824 PIO_12 pin and can be used to force the

LPC824 into ISP boot mode. This can be useful when the LPC824 flash is programmed

with code that disables the SWD debug pins or changes timing settings so that the debug

probe has problems communicating with it. To force ISP boot, hold the ISP button down

while pressing and releasing the reset button.

The ISP button can also be used to trigger an interrupt b y conf iguri ng the PIO_12 pin and

associated interrupt controls within your application code.

2.2.3 Wake

Depressing this button triggers a wake interrupt b y pulling-down the WAKEUP input (pin

4) of the LPC824.

2.3 LEDs

There are five LED devices on the board: one tricolor device (with red, green, and blue

channels) for user programs, three discrete LEDs that indicate t he acti vity of the debug

probe, and a power LED .

The Tricolor LED is driven by PIO_12 (red), PIO_16 (green) and PIO_27 (blue), with the

LEDs illuminating when t ho se lines are driven lo w.

Note: The red tricolor LED channel is also controlled by PIO_12, so the tricolor LED turns

red when ISP is depressed.

The status LEDs operate as follows:

• USB Disk LED (red): illuminates when the mbed disk device is being accessed.

• CMSIS-DA P (gre en) : illuminates when deb ug ac ti vit y (contr ol of the target SWD

port) is occurring.

• USB Comm (blue): illuminates when the mbed serial port device is active.

3. Expansi on c onne c t ors

The LPCXpresso824-MAX board provides four options for expanding the capabilities of

the board by adding hardware to it:

• Arduino UNO st yle hea ders .

• LPCXpresso/mbed headers.

• Pmod header.

• Prototyping area.

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See the board schematics, available at http://www.lpcware.com/lpcxpresso-max-boards,

for more information.

3.1 Arduino UNO headers

Arduino is a popular hobbyist platform, with a standardized set of expansion connectors.

The Arduino connectors on the LPCXpresso824-MAX board are compatible with t he

“Arduino UNO” platform. Several compatible expansion cards (shields) can be obtained

from vendors such as Sparkfun, Adafruit, and others. Shield designs might vary in their

implementation because the Arduino UNO platform is based on guidelines and is not a

fully defined specification. See the LPCX pr ess o824-MAX schematics and those of the

board(s) you are interfacing before attempting to connect the two together.

The Arduino UNO headers are factory installed on the LPCXpresso824-MAX.

3.2 LPCXpresso™ / mbed headers

The LPCXpresso headers on the LPCXpresso824-MAX are suitable for use with existing

LPCXpresso compatible baseboards, available from 3rd parties such as Embedded

Artists. Check the component clearance on any baseboard you are considering to ensure

components on the baseboard will not interfer e with the mounting of the

LPCXpresso824-MAX because this board is wider than the original mbed and

LPCXpress o™ boar ds .

LPCXpresso expansion headers can be mounted on the bottom side of the PCB but are

not factory fitted.

3.3 Pmod™ header

Pmod support is available on the LPCXpresso824-MAX:

• Pins 1 – 6 (left side) will support Pmod™ Type 2 (SPI) or Type 1 (GPIO).

• Pins 7 – 12 (right side) design to support I2C. Will Pmod™ Type 1 (GPIO)

interface.

Mount the Pmod connectors on the top side of the PCB.

Note: Connectors are not factory fitted for this interface.

4. Using devel opm e nt t ools

4.1 LPCXpresso IDE

LPCXpresso IDE supports programming and debugging LPCXpresso-MAX boards using

the on-board CMSIS-DAP debug interface, or with an external debug probe, such as

LPC-Link2. Version 7.4 or later of the LPCXpresso IDE is required.

Download the IDE from: http://www.lpcware.com/lpcxpresso.

4.1.1 Debugging via the built-in debug probe

LPCXpresso824-MAX is pre-programmed with CMSIS-DAP/mbed firmware and will work

out of the box with the LPCXpresso IDE. The IDE can detect the board as a

CMSIS-DA P pr obe when it is used for the first time and asks for confirmation that this is

the correct target. For subsequent debug sessions, this target selection is made

automatically.

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If running on Windows, you will need to install the mbed Windows serial port driver so

that the LPCX pres s o8 24-MAX board’s CMSIS-DAP debug link is visible to LPCXpresso.

Download the drivers from:

http://mbed.org/handbook/Windows-serial-configuration#1-download-the-mbed-windows-

serial-port

4.1.2 Debugging with an external debug probe

JP1 should be closed (jumper fitted) t o use the boar d w ith an exter na l debu g probe. See

section 2.1.1 for more information.

4.2 mbed

The LPCXpresso824-MAX board implements the latest version of the mbed interface

from ARM. When connected to a PC, the board enumerates as a mass-storage device.

Firmware images placed on it are written to the target MCU after a power cycle, per other

mbed boards. See http://www.mbed.org/teams/NXP for more information on

downloading the mbed SDK for the board and the mbed development environment.

4.3 Using other toolchains

A number of other toolchains can be used since the LPCXpresso-MAX boards support

the CMSIS-DAP protoco l. Ref er to the manuals from your development toolchain

provider for more information on how to use CMSIS-DAP probes.

5. Example code and drivers

The LPCOpen platform allows users to quickly and easily utilize NXP's extensive array of

microcontroller software libraries to create and develop multifunctional products. The

platform uses common APIs that work equally across all microcontroller families and can

be built with Keil, IAR, and LPCXpresso toolchains. De tai led documentation and

examples make it easy to integrate the necessary development tools into projects. For

more information on LPCOpen, go to http://www.lpcware.com/lpcopen. For direct access

to the LPCOpen drivers for the LPCXpresso824-MAX board, go to:

http://www.lpcware.com/lpcxpresso-max-boards.

The LPCXpresso824-MAX enumerates an mbed serial port device when installed. This

serial port is bridged from a LPC824 UART by the LPC11U35 to its USB port and is used

by the mbed tools. This device can also be used by host computer applications (such as

Tera Term) for debugging and application purposes when developing with other

toolchains. Some of the UART examples in LPCOpen show you how to use this port

(example, periph_mrt). However, other examples might use a different UART on the

LPC824 that require external circuitry or cables to be connected using the expans ion

connectors.

6. Re-flas hing the debug probe (LPC1 1U3 x )

The debug probe (LPC11U3x MCU) on the LPCXpresso824-MAX is programmed during

manufacture and does not require any update. However, if a firmware update is required,

follow these steps to re-program the flash:

1. Unplug the usb connector.

2. Hold down the reset button and plug in the usb connector.

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3. The board will appear on your system as a disk called CRP DISABLD.

4. Delete the file called firmware.bin on this disk.

5. Drag and drop the new binary image to be programmed onto this disk.

6. Connect and re-connect usb.

7. Board specifications

Recommended operating conditions: 0 to 70oC ambient temperature

Weight: 0.7 ounces

Size: 2.15 x 3.05 inches

The LPCXpresso824-MAX board is RoHS compliant.

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8. Legal i nf orm a ti on

8.1 Definitions

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modifications or additions. NXP Semiconductors does not give any

repres ent ati ons or war ra nti e s as to th e accu racy or complete ness of

information included herein and shall have no liability for the consequences

of use of such information.

8.2 Disclaimers

Limited warranty and liability — Information in this document is believed to

be accurate and reliable. However, NXP Semiconductors does not give any

representations or warranties, expressed or implied, as to the accuracy or

completeness of such information and shall have no liability for the

conseq uen ces of use of suc h inform a t i on.

In no event shall NXP Semiconductors be liable for any indirect, incidental,

punitive, sp eci al or con s eq ue ntial dama ges (i ncl uding - without limitation -

lost profits, lost savings, business interruption, costs related to the removal

or replacem e nt of an y pr od ucts or re w o rk charges) whethe r or not s uch

damages are based on tort (including n egli g enc e), wa rra nt y, brea c h of

contract or any other legal theory.

Notwithstanding any damages that customer might incur for any reason

whatsoever, NXP Semiconductors’ aggregate and cumulative liability

towards customer for the products described herein shall be limited in

accordance with the Terms and conditions of commercial sale of NXP

Semiconductors.

Right to make changes — NXP Semiconductors reserves the right to make

changes to information published in this document, including without

limitation specifica t ion s and pr oduct descri pti ons, at any time an d wit ho ut

notice. This document supersedes and replaces all information supplied prior

to the public ati on he re of .

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in life support, life-critical or

safety-critical systems or equipment, nor in applications where failure or

malfunction of an NXP Semiconductors product can reasonably be expected

to result in pe rso nal i nju r y, dea th or sev ere property or environmental

damage. NXP Semiconductors accepts no liability for inclusion and/or use of

NXP Semiconductors products in such equipment or applications and

therefore such inclusion and/or use is at the customer’s own risk.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes no

representation or warranty that such applications will be suitable for the

specified use without further testing or modification.

Customers are responsible for the design and operation of their applications

and products using NXP Semiconductors products, and NXP

Semiconductors accepts no lia bil it y for an y assist ance with applications or

customer product design. It is customer’s sole responsibility to determine

whether the NXP Semiconductors product is suitable and fit for the

customer’s applications and products planned, as well as for the planned

application and use of customer’s third party customer(s). Customers should

provide appropriate design and operating safeguards to minimize the risks

associated with their applications and products.

NXP Semiconductors does not accept any liability related to any default,

damage, c osts or problem whic h is bas ed on an y weak n ess or default in the

customer’s applications or products, or the application or use by customer’s

third party customer(s). Customer is responsible for doing all necessary

testing for the customer’s applications and products using NXP

Semiconductors pr od uc ts in ord er to avoid a default of the applications and

the products or of the application or use by customer’s third party

customer(s). NXP does not accept any liability in this respect.

Expo r t control — This docume nt as w ell as the item ( s) desc ri b ed he rein

may be subject to export control regulations. Export might require a prior

authorization from competent authorities.

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described herei n, have been included in the sec

tion 'Legal inform ation'.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an emai l to: salesaddresses@nxp.com

Date of release: 29 Septem

ber 2014

Document identifier:

UM10830

9. Contents

1. Introduction ......................................................... 3

2. Board layout ........................................................ 4

2.1 Jumper setti ng s .................................................. 5

2.1.1 JP1: on-board/off-board debug .......................... 5

2.1.2 JP2: target curr ent .............................................. 5

2.2 Buttons ............................................................... 5

2.2.1 Reset .................................................................. 6

2.2.2 ISP ..................................................................... 6

2.2.3 Wake .................................................................. 6

2.3 LEDs .................................................................. 6

3. Expansion connectors ........................................ 6

3.1 Arduino UNO headers ........................................ 7

3.2 LPCXpresso™ / mbed headers.......................... 7

3.3 Pmod™ header .................................................. 7

4. Using development tools .................................... 7

4.1 LPCXpresso IDE ................................................ 7

4.1.1 Debugging via the built-in debug probe .............. 7

4.1.2 Debugging with an external debug probe ........... 8

4.2 mbed .................................................................. 8

4.3 Using other toolch ain s ........................................ 8

5. Example code and drivers .................................. 8

6. Re-flashing the debug probe (LPC11U3x) ......... 8

7. Board specifications ........................................... 9

8. Legal information .............................................. 10

8.1 Definitions ........................................................ 10

8.2 Disclaimers....................................................... 10

9. Contents ............................................................. 11

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