LPC is a series of 32-bit ARM microcontrollers manufactured by NXP Semiconductors.

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Flash Magic for code dumping (LPC1778)

I was reading a book called "Insiders guide to the Phillips ARM7 based microcontrollers". There it says "The easiest way to program the Flash is by the built in bootloader which allows the code to be ...
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80 views

Rx data rate on CAN bus faster than polling rate

I'm working on a safety-critical SIL 4 system and so interrupts have to be kept to a bare minimum (hence using only timer interrupts). CAN is used in polling mode. Suppose data arrives at a CAN node ...
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FullCAN implementation help or tutorials

NXP's LPC series microcontrollers have acceptance filters implemented in the FullCAN section. Is there any example code, documentation, or tutorial for FullCAN?
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UART is acting weird

I programmed UART3 peripheral on LPC4088 to send a single unsigned character posiljka over Tx line. This is done by continuously copying this character into the ...
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25 views

Why does my LPC812 require PIO0_1 to be tied to ground?

I am using an LPC812 (specifically the 20 pin SOIC version LPC812M101JD20). This is currently soldered to an adapter and being tested in a breadboard. To program this PIO0_5 (RESET) and PIO0_12 (ISP ...
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51 views

Necessary things in LPC1343 basic development board

I have finished my LPC1343 basic development board,just based on specs from datasheet and some referred from microbuilders.eu. I'm unsure if the board design is good or not so I've attached my ...
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LPC1788 external interrupt with CMSIS

There was a wide GPIO functions in the CMSIS initial versions which made easy setting and initialization of interrupts,like: ...
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39 views

Fill unused sector in flash with random value

I asked this question on the KEIL forum http://www.keil.com/forum/60463/ but got no response so trying my luck here. I have a LPC2292 system and i use a linker file to flash the FLASH / ROM on the ...
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134 views

Storing a secure key in an embedded device's memory

I am working on an embedded device which send/receive data and stored them in ciphertext mode (encrypted mode ). Now what's best approach for storing Keys (I used ARM CORTEX M series MCU) ? ...
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46 views

USB enumeration problem, cannot reply on request

I program with LPC2368 on ARM7 architecture and will configurate usb coonection with my pc. After initialization periphery and clock, i try to start usb. I am using the following scheme fro pull-up ...
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51 views

Cannot transmit message (receiving is working, but without ack) on CAN bus (LPC2368)

I work with microcontroller LPC2368. After initialisation of the CAN interface to normal mode (not listen-only mode), I can receive all messages, but the microcontroller cannot send an acknowledge ...
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37 views

Is softconnect is necessary in lpc1343

I am doing my own development board using LPC1343.I gone through the application note AN10986.I noticed the topic "Automating USB ISP".In that they described about USB softconnect. Now I am designing ...
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41 views

IDE to upload code to LPC1343 over USB

LPC1343 when connected to PC acts like a mass storage device.How can I upload code to the microcontroller.Is there any IDE which converts the C program to .bin for uploading the code?If so,please tell ...
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145 views

LPC2129 CAN bus interface to OBD-II

I want to connect an LPC to the CAN bus in my car, and I found that LPC2129 have the CAN protocol implemented on the chip. Searching the Internet, I saw that most of microcontrollers are connected to ...
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72 views

LPC1769 CAN communication

I am learning CAN bus with LPC1769 and the LPCXpresso base board. I am in badly need of some demo code on CAN communication on the LPC1769 to know how it can be configured and works, but I can not ...
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19 views

LPC4337 I2S Synchronized Word Select Signals

I am trying to setup the I2S peripheral on an LPC4337 device so that it will send and receive audio data in master mode. The problem I am having is that I would like to ensure that both the transmit ...
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71 views

Controlling a servo motor on an LPC2103 microcontroller

I'm still a beginner on deep embedded systems development. I would like to know how to control a servo motor without using PWM, since I didn't actually learn anything about it on my classes and I'm ...
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50 views

Using a radio board with Contiki-OS on lpc1347 mcu

I am trying to build a port for Contiki on my lpc1347 board. So far I have been able to run a basic LED blinking/Hello_World Contiki process/program on my board. My next goal is to use a cc2530 radio ...
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40 views

Problem with IAP

I'm using LPC1788 IAP to write to Flash and I'm a little confused on what's going on. I'm trying to write 8 bytes of data to Flash memory with 2 tehniques: 1) With one which is logical to me and it ...
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330 views

Output clock of the LPC1768?

I am using NXP's LPC1768 development board and I came across the User Manual for this part and page 67/849 section 4.10 descusses the External Clock Output. I couldn't figure out which pin out of the ...
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312 views

UART interrupt problem on LPC1788

I wrote a code ...
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3answers
73 views

Will XORing the FIO0PIN register on an LPC175x6x give unexpected results?

Is this code guaranteed to only effect pin 22? int* FIO0PIN = (int*)0x2009C014; *FIO0PIN ^= (1<<22); At first it seems like a dumb question but I remember ...
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300 views

How many device classes can a single USB composite device implement?

I'm looking to use an LPC1345 microcontroller to run a USB hub. Thanks to this question, I know that a single USB device can be used to act as multiple classes but how many? The USB hub would have ...
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265 views

ise complaining index out of range, but it seems to be in range?

I'm righting a vhdl module that calculates the LPCs from incoming DT samples. My ise editor is complaining that my index is out of range. Is there any reason anyone can see that it should be ...
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253 views

How to automatically allocate a page of flash for in-application storage of settings

I've been using the LPC8xx range of Cortex-M0+ MCUs quite successfully. One difficiency: these don't have inbuilt EEPROM (to preserve settings across power cycles etc). However there is a work-around: ...
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952 views

How can I log information from code in IAR Embedded Workbench to a log file?

I'm trying to develop an application for the NXP LPC1788 microcontroller and I would like to be able to log formatted strings at arbitrary points within the source code to a log file in a way that has ...
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Which ARM MCU family is better for beginners? [closed]

Which ARM MCU family is better for beginners? I mean which family: Is straightforward and easier to learn Has more/better learning and development resources available Has bigger and better ...
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88 views

Will a HCMOS output TCXO work with LPC1114?

I am planning to use the output from a FOX924B 10 MHz TCXO with HCMOS output as an input to the 32 bit counter of LPC 1114 (not the XTAL input, but to CT32B0_CAP0 pin). I have the following questions: ...
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159 views

Checking Full condition of RBR FIFO of LPC2148 UART

1)How do you check whether the RBR FIFO is full in case of LPC2148 UART? I know that the empty condition can be checked using Receiver Data Ready(RDR) of Line Status Register(LSR). But there is no way ...
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102 views

Same address for different registers in LPC2418 UART

I have a very basic question regarding LPC2418 UART. The UART has got different registers with the same addresses. So while loading the data from the test bench, will it not load into all the ...
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81 views

Will the ADC work with resistive inputs in LPC1796

I'm working with LPC1796 and I have to do data acquisition for my project somebody told me that LPC1796 microcontroller won't work with resistive inputs. What is a resistive input? Is there any way ...
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818 views

RMII MAC side routing and signal integrity

I have some signal integrity and EMC questions. In my board LPC1768 RMII interface is connected to LAN8720. Because of pin locations some RMII signals must go through bottom layer. This is a four ...
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158 views

LPC2148 + Eclipse + yagarto + openOCD. Issue with the interrupts

I'm using 'Eclipse-Indigo' + yagarto + 'openocd-0.7.0' setup for a project on LPC2148. I've set up the environment properly. I'm able to compile, link and debug the project. I've configurred Timer0 ...
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LPC1768 Power Supply Design (an unknown symbol)

I have a question about power supply design for a board which use an LPC1768. Below image is taken from http://www.nxp.com/documents/other/IAR_LPC1768_Eval_Board_Schematic.pdf document. There is a ...
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247 views

With LPC1343 (ARM Cortex M3), how to control the the initial state of the MAT output from the timer?

I know that when the timer match the M1, I can let the mat pin to be up, down or toggle. But how to control the initial state of the MAT pin? I'm using LPC1343CodeBase on a port1343 experiment board. ...
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274 views

Using LPCXpresso 1114, I am unable to call a function in a C++ file from a C file

I am having a similar problem to the one described in this post: Why isn't my SysTick_Handler() being called in my LPCxpresso C++ Project? I have a couple of .cpp files, but the rest are .c ...
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371 views

Optimal configuration for PLL on LPC17xx

I'm trying to write an algorithm that would pick the best available PLL0 configuration for the user based on F_in and F_cclk. The manual says that I should pick higher F_ref if possible for a more ...
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155 views

LPC1343 evaluation board USB bootloader not working?

My LPC1343 no longer shows up as a USB mass storage device. I am using the following evaluation board for NXP's LPC1343: ...
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251 views

Startup sequence for lpc1343

I'm exploring my first arm device the lpc1343, I'm using VIM and ARM GCC, I have managed to light an LED but to blink it, I will need to startup the clock and pll, right now I can't find the right ...
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468 views

lpc1343 upload firmware via UART bluetooth module from linux

I am a novice to BT so I am looking for some advice. My LPC1314 has a bluetooth module soldered to its UART. I believe the BT module is a HC-06. I want to use BT to flash the firmware.bin to the ...
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307 views

Getting started with an LPC1313 Microcontroller [closed]

I recently purchased this microcontroller along with an FTDI TTL-232R-3V3 cable. I want to program a blinking lights hello world application onto the microcontroller. I was told that I might be able ...
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Why isn't my SysTick_Handler() being called in my LPCxpresso C++ Project?

I have created a C++ project for an LPC1227 using LPCExpresso 6.1.0. The project, up until now, builds and runs fine. I have not made any changes to ...
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2answers
1k views

ARM microcontroller, where to begin [closed]

I had previously worked on Arduino but I think it was very simplified for the users. Now, I want to learn properly. I decided to begin learning ARM microcontroller. So, I bought LPC1114 DIP because I ...
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3answers
415 views

Continuing execution after ISP in LPC81x series

I am uploading software via serial ISP in to an LPC81x series microcontroller. This is a Cortex-M0+ chip. After software upload, I would like to start the execution of the uploaded software without ...
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800 views

How to connect WiFi module and Miсrocontroller via MII interface

WiFi module: WIZ610WI Microcontroller: LPC1788 Purpose: Connect it via MII on PCB I have the following scheme: Do I need a signal delay on TX_CLK? On what line and what the value of ...
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203 views

Help to fix custom CDC Send function

I am using a custom code of CDC example from 177x_8x_PDL_110602 package (I am not using LPCOpen). I am having a trouble with CDC_Send function. That is the scenary: An python script send messages to ...
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767 views

NXP LPC1114 UART doesn't work after reset

I'm building a simple circuit with LPC1114 to make a "hello world" application using UART. Trying to write all the code from scratch, to have a better understanding on what's happening. My problem is ...
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710 views

USB Stack for LPC1343

I was trying to implement a USB keyboard on LPC1343 using the ROM based HID driver when I came across some information on the internet which stated that the ROM based HID driver is very limited in ...
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1k views

openOCD flash 'erase_sector' command NOT erasing lpc1768?

I am trying to debug LPC1768 using a JTAG debugger and openOCD(version 0.7.0). My os is Win7 . I'm connetced to the openOCD via telnet(port 4444) commands like halt, flash info, resume etc do work ...
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NXP LPC 4330 Microcontroller starts up very hot and sometimes doesn't start up

EDIT 3 The correct solution is shown below, in TurboJ's answer in fact, this exact issue was mentioned in the LPC4300 errata ES_LPC43x0: EDIT: Nope, sorry false alarm. The new board started doing ...