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I2C protocol question   [5 Articles]

I'm interested in people's opinion on this. I am using a I2C Graphical Display interfaced with a LPC2148. On occasion, the I2C command sent out drops a byte which causes the co...

Re: LPC2378 Problem switching oscillator from Main to IRC   [2 Articles]

My device is working without problems on IRC and also on RTC clock. I think that the problem in your code is that you disable the main oscillator while still using it. You should ...

UTC timestamp   [2 Articles]

Dear all, I am working on a project to use SNTP protocol to transmit UTC time to other systems. But I can't seem to find any formula to convert the UTC timesta...

ARM SBC   [3 Articles]

Hi, I'm new to ARM, but very experienced 8-bit programmer. I am looking for advice on which MCU and a cheap ( ...

LPC2468 JTAG and RX/TX Loader not working

This is a strange one. I'm trying to get a new design running with LPC2468, and I can get them to talk to me. I've got 2 proto boards both do the same thing. When I connec...

Re: LPC2468 Reset -- What am I doing wrong?   [2 Articles]

--- In l...@yahoogroups.com, "jcwren" wrote: > > Having done several designs with the LPC2148, I'm now switching my > attention to the LPC2468. However, I'm seemingly hav...

power down input protection for LPC213x ADC

Hi Folks – I have a question about power down input protection for the ADC circuit for the LPC213x processors - does the LPC213x have a JFET or similar protection for the input...

Re: Evaluation Boards (what about Olimex?)   [2 Articles]

I need to jump in and recommend another alternative here...=20=20 Don't forget the Olimex boards. These are usually the most feature rich for the price. Both boards below u...

Re: JTAG is no working in LPC2387..

Hi, A.F.A.I.K, the 2387 is a slightly new part. However, the problem you descri= be is very similar to what I suffered a couple of months with my first 23xx= part, and I know...

Re: more JTAG woes - new prototype with LPC2148   [5 Articles]

Should TRST get pulled high? Should TCK get pulled low instead of high? 10K pull ups? I've designed 5 or 6 different systems around LPC214x variants all with JTAG withou...

Using the RTC oscillator in LPC-2378

Hi, I was recently trying to use the the RTC oscillator as the PLL clock source for LPC-2378. I noticed that if I chose to use the RTC oscillator on the LPC-2378, uploading ...

LPC2368 Package Functions   [4 Articles]

Anyone having troubles with code downloading for LCP2368? I'm correctly connected to my board, however, every time that I try to download the code, some failure occurs. Ranging fro...

RTC LPC2368 battery RAM index   [2 Articles]

Hello, I have a doubt regarding RTC LPC2368 battery RAM index. Is it possible to have BYTE format access to this memory? I mean, to access to each byte. I only get integer a...

3.3v and 1.8v supplies on 2101   [2 Articles]

Does anybody know whether the 2101 can operate on the 1.8v supply only (the data sheets suggest that 3.3v is for the I/O). I would love to be able to shut down my 3.3v boost reg...

RTC Battery Powered RAM   [3 Articles]

Hi all, How can I load the RTC time and data values at standing on 0xE002 4020 - 0xE002 403C addresses on LPC2378 to battery powered RAM side at standing on 0xE008 4000. H...

Trouble with programming   [8 Articles]

Hi, I recently acquired a CrossConnect for ARM, along with CrossWorks. I have developped a prototype board using the same JTAG system as MCB2300 from keil. The board power is wor...

PLC2368 and using 32khz clock for the system...   [5 Articles]

Could someone give me a code snippet to set up the 2368 to run the 32khz rtc xtal through the PLL? I'm happy just to get it working at any speed. I'm trying to run with N=2...

Re: Please provide critique for my LPC2129 circuit   [2 Articles]

--- In l...@yahoogroups.com, "Nick Alexeev" wrote: > Colleagues, > > Could you provide some critique to my circuit? The project is a > galvanically isolated USB to CAN...

LPC2148 RTC alarm registers   [6 Articles]

I am having trouble setting the alarm registers in the LPC2148 real time clock. No matter what I set them to, they always read back the same. They seem to contain random values...

RTC problem. CTIME0 don't copy the DOW value   [2 Articles]

To read the data RTC's I used the registers CTIME0 and CTIME1. I have a equipment that have a problem. The CTIME0 don't copy de value of the DOW. Bits 24, 25 y 26 in CTIME0 ar...

Re: How to check if LPC is working?   [2 Articles]

----- Original Message ----- From: "active_si" To: Sent: Monday, April 21, 2008 6:18 AM Subject: [lpc2000] How to check if LPC is working? > Hi! > > I got my firs...

capacitor on xtal oscillator

Hi at All I have one question on the minimun capacitor connected on the main oscillator in LPC 23xx, can be this value 12pF or less? and in RTC oscillator the minimu value can b...

capacitor on xtal oscillator   [2 Articles]

Hi at All I have one question on the minimun capacitor connected on the main oscillator in LPC 23xx, can be this value 12pF or less? and in RTC oscillator the minimu value can b...

lpc2148 prototype problem with JTAG (ULINK- Keil)   [3 Articles]

Hello, I' ve just assembled a board with a LPC2148 and i can't connect with ULINK and Keil. I can download software using internal bootloader and com0 (p0.14 pulldown) with...

Low battery detection   [7 Articles]

Hi All, I have a 2103 project that has a battery to keep the RTC going when system power is not available. Eventually the battery will die and the RTC time should not be trusted...

Re: ARM on battery power

--- In l...@yahoogroups.com, "Michael Anton" wrote: > > I have a couple of LPC2148 designs running at 400uA, with the RTC > running. Mike, 400uA, thats encouraging, b...

Re: ARM on battery power

I've gotten my design down to 1.7mA with a LPC2148 in power down, but I have my RTC running. I haven't been able to find the source of why so much current in power down but I'll...

Re: Getting started with CrossStudio/connect

Hello again, I=B4ve found the error! It seemes like the package files were corrupted somehow? I downloaded them once more and then no errors orcurred?? --- In l...@yaho...

Re: Getting started with CrossStudio/connect

push the the reset button before programming, helps for me regards Citeren "r.jensenm" : > Hi every one, > I have compiled my first very simple project and want to ...

RE: Getting started with CrossStudio/connect

Hi, > Hi every one, > I have compiled my first very simple project and want to download the > code via Crossconnect for ARM RTCK interface. It is possible to > connect to...

RE: Looking for ideas on how to wake PSU from low power mode with LPC2364

Thanks Brain- As far as I can tell, this Alarm Output Pin is only on the LPC2377/78 and LPC2388 parts. I am using the LPC2364 unfortunately. Colby _________________________...

Re: "LPC2148_Demo_v120" build under windows with gnuarm and cygwin   [6 Articles]

--- In l...@yahoogroups.com, "acarlosss1" wrote: > > Hello all, > > Has anybody managed to build this "demo package" from "J.C. Wren" in > windows with cygwin/gnuarm ...

Boot loader (ISP mode never entered)   [5 Articles]

What must I be doing wrong! I am developing the firmware for a custom LPC2148 board, The boot loader is never fully invoked after a external reset with P0.14 low. After inv...

Re: Boot loader (ISP mode never entered)   [2 Articles]

--- In l...@yahoogroups.com, "rodger_s" wrote: > > What must I be doing wrong! > > I am developing the firmware for a custom LPC2148 board, The > boot loader is nev...

crossworks Tasking library   [4 Articles]

Hi Guys, I have a strange problem. with the CTL(crossworks tasking lib). Have created two tasks , and hooked the timer0 for the task switching. every thing wor...

Re: Bad LPC2103 Silicon ?? Request for a parallel verification Please...   [7 Articles]

> Hi Bob, > > might sound strange but it is rather important. Did you connect Pin4, > Vbat to 3V? A couple years back, when the LPC2103 was rather new, we > found that ...

RTC RAM in LPC24xx

Does anybody knows how I must declare the variables for using RTC RAM (or USB, or Ethernet RAM)? It is necessary to add some lines in .ld file? Thank you. Paul. ...

Reset Source Identification Register   [3 Articles]

Hello; I am working with LPC2134 with Keil m-vision development tool. I am facing random RESET problem on my board. I am using AD converters, IIC, and RTC, serial communicat...

LPC23xx RTC resolution   [2 Articles]

Hi all After looking at the RTC API, it seems like the best resolution one can get is one second. While I can set up a timer to have a time base with a better resolution thi...