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

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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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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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35 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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61 views

NXP LPC2138 does not start up. Electronic problem?

I have a problem with LPC board and I cant figure out what is wrong. It manifests like this: I can connect board via jtag and Keil sw recognise the processor. I can program it (at least I guess that ...
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63 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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176 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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31 views

ROM functions through CMSIS on LPC15xx

I'm playing with LPC1549 uC. I'm using CMSIS library, and I'd like to ask how could I use the ROM functions through CMSIS? Maybe it is a silly question but I'm not sure about it.
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70 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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60 views

Using an LPC812 to relay/transform SPI commands

I'm trying to use the LPC812 as a SPI relay between an FPGA and a new FPAA. The purpose is to make the hardware backwards compatible with old firmware by taking old SPI commands from the FPGA and ...
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101 views

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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56 views

How to interface SED 1335 F0A LCD controller to LPC 2148?

I'm trying to interface a 320x240 Text/Graphics LCD module to an ARM microcontroller-LPC 2148. The LCD controller is SED 1335 F0A by EPSON. The LPC 2148 is mounted on a Keil Evaluation Board-MCB 2140. ...
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93 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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123 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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116 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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66 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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65 views

LPC11u14 Flash driver “UnInit” return code: 0x1

I have a board lpcexpresso. With LPC11U14 After connecting some LED to pins I can not flash it anymore with the given error Flash driver "UnInit" return code: 0x1 Flash driver "UnInit" return code: ...
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105 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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103 views

LPC17*, SSP, Half Duplex problem

I have a device connected to LPC1788 by SPI. The device responds to the given commands, that if I transmit some data to it it transmits back the response. The size of the commands is not fixed, can ...
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318 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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121 views

LPC1769 Xpresso board not responding to ISP

I've been happily programming my LPC1769 Xpresso board using an FT232 breakout board for weeks now. Recently, I moved the project into an enclosure, and it no longer responds to programming. I've ...
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199 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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722 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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239 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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423 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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148 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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400 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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433 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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597 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 ...
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LPC1788 reading via SPI from ENC28J60

I have a problem with SPI communication with ENC28J60 chip. Basically I can't use SSP in SPI mode as it is, because ENC28J60 expects CS to be low for multiple bytes while SSP shifts it high after each ...
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142 views

uC -> wire -> LED in metal enclosure. ESD/EMI protection

I need to blink a LED with a LPC micro-controller. Enclosure is solid aluminum. LEDs will be on a separate PCB 20cm away from uC PCB and protruding from the metal enclosure. What would be the simplest ...
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341 views

USB CDC connection (plug / unplug cable)

I am having a issue with USB CDC (running in a LPC1788). If I power up a mother board with the USB cable (NXP device) already connected, the O.S. (Linux) does not identify the device, but if I unplug ...
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136 views

Books/tutorials on programming a microcontroller [closed]

I'm relatively new to programming with Microcontrollers. I bought an LPC1313 MCU and an FTDI RS232 cable from newark. I later found out that I would need to construct a PCB with 6 pin headers inorder ...
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86 views

Creating a PCB for my MCU

So I have an NXP-LPC1313DFB48 MCU and I want to create a PCB from scratch so that I could connect my FTDI RS232 cable to it and program the MCU. What parts would I need to do this and what steps would ...
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125 views

How do I configure a external RTC that uses 3-wire SPI for the LPC 2387?

Here is the link to the datasheet of the RTC PT7C4302. I can do it with MISO, MOSI, but SISO I have no idea how to do. Some similar code examples would be great.
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359 views

Synchronizing SPI ports for higher data rate

I am designing a new board which uses the NXP LPC4330 (Cortex M4 microcontroller) with a XESS Xula2 FPGA development board. In this design, the Xula 2 has limited I/O pins since it is designed to fit ...
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294 views

JTAG Programming with LPC4330

Because the Example Virtual Serial Device project from NXPUSBLib contains a space in it's directory structure (specifically Example_VirtualSerialDevice/LPC43xx M4/...) I can not successfully download ...
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1answer
422 views

USB 2.0 PCB trace design restrictions

Thanks to the help from this community I am much closer to finishing my new design. Right now I am most worried about my USB 2.0 traces, and I want to make sure that I am doing everything right with ...
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128 views

bmp085 output is little off

I have got this Bosch barometric sensor BMP085 and im trying to make library for ARM LPC2000 microcontroller. Basically i have everything running but my reading values are wrong. I have tested ...
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231 views

Intel hex file to UU-encode format for LPC2148

I'm writing the application for OSX which needs to send a new program (compiled lpc code) via Wifi to microcontroller and there i will use built in ...
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366 views

Voltage Level Translation: LCD(5V) -> GTL2000 <-> MCU (3.3V)

I am trying to interface a micro-controller (LPC11C14) to a LCD. The LCD has Vih = 3.5V so I cannot directly connect the uC pin to the LCD. For this, I found a GTL2000 chip which looks like it might ...
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283 views

i2c on different logic level devices

I'm having a problem making LPC2148 work with SRF10 sensor. LPC is 3.3v device with 5v compatible i2c (at least user docu claims that). On the other side there is SRF10 device which is 5v. I have ...
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185 views

Reading useful data from barcode input

I have interfaced a HID bar-code scanner with LPC2468. It is sending data when i scan a bar-code, it sends a lot of bytes when i make a scan, how can i know out of these bytes which are the bytes ...
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180 views

Effect of Changing polling time in hid interrupt transfer

I have interfaced a HID bar-code scanner with LPC2468 using interrupt transfer. The polling interval which i receive(from bar-code) in the Endpoint Descriptor is 10 ms. What will happen if i increase ...
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97 views

Polling hid device on lpc2468

I want to interface an HID bar code scanner with lpc2468 16/32 bit micro,Enumeration was successful using the UsbHostLite code,I want to poll the hid device after every 20 ms, but was not able to do ...
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Interfacing Low speed hid device with LPC2468

I am working on LPC2468 Hid.If i interface a full speed hid device with the controller, enumeration is Successful but in case of Low speed devices enumeration is not successful. I am using the sample ...
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316 views

i2c problem on LPC2148

I have problem with getting my LPC2148 to work with i2c devices. LPC is on 3.3v bus and i2c devices are on 5v bus with pull-up of 3k6 ohm on either 3.3v or 5v (jumper selection). What im experiencing ...
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3k views

Termination resistors: are they needed?

For a project I'm designing, I'm using an IS42s32800 (TSOP) SDRAM with an LPC1788 (QFP) microcontroller. On the PCB I have 4 layers with a ground plane right below the top signal layer and a VDD plane ...
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Getting started with LPCXpresso

I just got my LPCXpresso 11U14 Cortex M0 board. I spent a week trying to get SPI working and I still get compiler errors! I've tried to use the example projects on NXP's website, but they are all for ...