LPC is a series of 32-bit ARM microcontrollers manufactured by NXP Semiconductors.
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71 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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0answers
93 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
118 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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68 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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82 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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1answer
124 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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1answer
152 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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1answer
130 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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69 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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59 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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71 views
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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1answer
171 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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91 views
RTOS Datalogger example
I'm trying to develop a datalogger on a Cortex M0 (LPC11U14), and I was thinking of using a real-time OS like FreeRTOS, so that I can have one low-priority task that writes the data to SD, and ...
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2answers
950 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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0answers
621 views
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 ...
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3answers
227 views
LPC1343 Firmware Loading - Change drive label
I have a system that is using the built-in firmware loading facility of the LPC1343. When the flash drive is mounted, the disk is always labeled "CRP_DISABLED". Is there a way to change the label of ...
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5answers
520 views
Is there a standard In Circuit programming connector for LPC chips?
The various LPC microcontroller chips have a boot mode that accepts serial communication and writes the received program to Flash. I want to make a PCB with and LPC1114 that must be programmed in ...
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2answers
282 views
Pin numbering on LPC2148
The pin numbers aren't listed anywhere on the board. Where's pin 1? Where's the pin for ground.
This is what it looks like.
This seems to list the pin numbers, but it's not really helpful in this ...
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2answers
174 views
Setting I/O voltage on an embedded linux board
I'm using a LPC313x based linux board (Embedded Artists). I see in the LPC3141 DS that the I/O can be either 1.8 or 3.3V.
How/where can I set the voltage level in Linux?
Is the input somehow ...
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1answer
385 views
Can an LPC1343 accept its initial program over USB?
The LPC13xx datasheet suggests some clock setup is necessary to use USB. Does the chip's built in boot loader make it possible to load the initial program over USB, or do the clock multipliers have to ...
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2answers
588 views
Debugging a LPC23XX based CAN bus sniffer
I am trying to get a CAN bus sniffer working, based on LPC2368. I keep getting a bus error interrupt, of type "form error". I suspect my timing settings. I verified that the sending party is ...
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1answer
327 views
What are the things to watch out for when switching from AVRs to Cortex M3?
I've just recently gotten my Cortex M3 (LPC1343) up and running, following Microbuilder's instructions to get a GNU C compiler working for it. I've run some example code and in general, the code seems ...
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1answer
164 views
Are there any open design files for an NXP LPC1* breakout board?
I would like to build a board for an LPC1* processor. Are there published Eagle layouts for these?
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2answers
285 views
Reading a LPC2378 microcontroller
I can't get data off my ARM LPC2378 microcontroller - does it need UART or can any GPIO be used?
