Re: [lpc2000] Re: How to detect a multiply overflow?
2005-08-11 by Aalt Lokhorst
Hello Well, I think I have two solutions. 1 Limiting and probably scaling the numbers into smaller values. 2 Go for the 32x32 multiply and saturate the 64 bit
Messages
Browse messages
Page 162 of 329 · 16407 messages matched
Need explicit power-up of ADC1?
2005-08-11 by brendanmurphy37
We ve had a problem using the ADC1 on the LPC2134. It s still being confirmed what the exact problem is, but it looks like the ADC1 peripheral needs explicit
Re: VIC on LPC2129
2005-08-11 by brendanmurphy37
We had the same problem when we stressed the part with lots of interrupts: to be safe you definitely do need a default interrupt handler. It can be completely
DSP function library for ARM
2005-08-11 by theothervmax
Hi, I wonder is there any free library for ARM MCUs with DSP functions implemented (FFT, filtering, etc.) ? Recently I found ARM s Application Note 16 but
Re: [lpc2000] Re: How to detect a multiply overflow?
2005-08-11 by 42Bastian Schick
brendanmurphy37 schrieb am Wed, 10 Aug 2005 ... -- 42Bastian Schick
Re: [lpc2000] Re: Low cost complete ARM Evaluation Kit
2005-08-11 by Doug Sutherland
One thing that puzzles me: many of the oki arm chips have I2S interfaces, while LPC does not. Seems a bit strange since Philips invented I2S. -- Doug
Re: [lpc2000] Re: Low cost complete ARM Evaluation Kit
2005-08-11 by mpw
Hey there, Thanks for the pointers .. Personally I really like having everything come all packaged up and tested. Saves time, and time is money. The board
Re: [lpc2000] Re: VIC on LPC2129
2005-08-11 by Steffen Rose
Hi, ... In our case the solution was, that a second interrupt was triggered at the time we was within an interrupt routine. Now we added a empty default
RE: [lpc2000] Re: Low cost complete ARM Evaluation Kit
2005-08-10 by Randy M. Dumse
... Thanks for the mention of our $29 board. Yes, I was wondering what that post was about, with an OKI processor that was half the speed and 8x the cost of
Re: VIC on LPC2129
2005-08-10 by big1ogre
Hi, Steffen, I have similar problems, using vectored interrupts from UART0, UART1, I2C and SPI0. It appears that you occasionally get vectored to the default
Re: How to detect a multiply overflow?
2005-08-10 by brendanmurphy37
I stand corrected: the smull instruction does indeed produce a 64- bit result. The LPC2000 series parts definitely do have the DSP extensions: we use them in
problems with I2C interruption
2005-08-10 by ricardo_silva_marinheiro
hello! I m trying to make a routine to take care of the I2C protocol and communicate with an external component wich is an I/O port (PCA9555 from phillips).
Re: [lpc2000] Re: How to detect a multiply overflow?
2005-08-10 by Jerzy Lelusz
... I think it s excellent ;-) ... Isn t it easier just to limit error signal? So as long as error signal is within certain limits there is no overflow. That s
Re: [lpc2000] Re: How to detect a multiply overflow?
2005-08-10 by Aalt Lokhorst
Thanks for your answers, I have tried the solution of Anton and I think this will do the job. (See also the resulting assembler code further in this email) At
Ada
2005-08-10 by Andreas Schwarz
Hi, are there any Ada compilers/runtime systems that can be used with LPC2xxx or ARM7TDMI in general? For AVR there is a GNAT port on
Re: [lpc2000] Problem facing with UART0
2005-08-10 by vassum@myway.com
hai can u please send me code for UART0N.SrinivasuluEngineer R&DAlfa Electronic Services49-22-5, 1st Floot, Sri Sai MansionSankara Matam, Lalitha
Re: Low cost complete ARM Evaluation Kit
2005-08-09 by lpc2100_fan
Hi, if you really want it low cost, this might help: http://www.newmicros.com/ click on the LPC2131 link and buy a little board for $29. Links to download GNU,
Interrupt Eclipse
2005-08-09 by flying_wookie1
Hello all, I am trying to build one of the examples from the hitex book (keil has the code examples) on the eclipse development environment. When I compile
J-link and U-Link with gnu
2005-08-09 by c_hall2001
Sorry for the dumb question but I m just getting started with the ARM and haven t had much luck with the wiggler. Can the J-link or U-link be used with a gnu
Re: Low cost complete ARM Evaluation Kit
2005-08-09 by lpcarmed
Please correct me if I m wrong, but OKI still do not provide code protection for the internal flash.
Re: How to detect a multiply overflow?
2005-08-09 by brendanmurphy37
Hi, In the general case, you re pretty much guaranteed overflow: multiplying two numbers of a fixed precision (e.g. 16-bits) gives a result twice that
Re: [lpc2000] How to detect a multiply overflow?
2005-08-09 by Anton Erasmus
... You can do a 32x32 bit multiply to get a 64 bit result. You can either use the 64bit result directly or force the 32-bit answer to the maximum. If you are
How to detect a multiply overflow?
2005-08-09 by Aalt Lokhorst
Hello All, I have concerns about a PID routine which is doing some calculations with 32-bit values. It uses multiply and add instructions. My concern about
External Memory Access
2005-08-09 by wiese_matthias
Hi, I m trying to access the external Memory of the LPC-E2294 (from Olimex). I configured the EMC as followed: // Initialization of EMC // FLASH 16bit; IDCY =
Re: [lpc2000] Re: measuring pulse width
2005-08-09 by Don Williams
Gus, Why dont you just gate the incoming frequency with a pwm/timer output which generates an interrupt also when it goes off (could be clock tic from ur
Re: measuring pulse width
2005-08-09 by Gus
From what you guys are saying, I think my ISR is too slow!! When I feed my system with 10KHz 50% duty, I get 10% error around the correct value In my ISR, I
Re: [lpc2000] Lpc22xx and sed1335
2005-08-09 by Gary Greene
Hi Fred, Have you actually used the LPC2214/2294 in 8 bit mode? I have used the Olimex LPC2214 eval board with the CS8900A ethernet chip and while I could read
Tool for CAN BTR
2005-08-09 by Huber Martin
Hi all Does anybody knows if there is a tool to calculate the right values for the CAN Bit Timing Register (CxBTR), depending on bus speed and system clock? I
Re: Lpc22xx and sed1335
2005-08-09 by szemzoandras
hi, Thanks, I know I can set the delays via the BCFG registers, :) I only wanted to know my idea is possible or not, and max waitstates will be enough for sed.
Re: [lpc2000] Lpc22xx and sed1335
2005-08-09 by DECwiz (Fred van Kempen)
Of course, the waitstate values have a max of 31, not 15. --fred (who ll wake up first..) DECwiz (Fred van Kempen) wrote: That s what the
Re: [lpc2000] Lpc22xx and sed1335
2005-08-09 by DECwiz (Fred van Kempen)
That s what the BCFG3 register is for (in your case.) It sets the various access modes (MW=0, RBLE=0), delays (DLCY=15) and wait states for READ (WST1=15) and
Re: [lpc2000] Problem facing with UART0
2005-08-09 by Jan Wilmans
... I use both, I have no problem at all, but note that UART0 does not have DSR/CTS signals. Gr, Jan
Lpc22xx and sed1335
2005-08-09 by szemzoandras
Hi, I would like to port my sed1335 driver to the lpc. I would like to use it in memory mapped mode, so I connect data, rw, e, and cs lines. I have an A0 pin
Problem facing with UART0
2005-08-09 by seena_ele
hai all I am using UART1 for my application its working but i am having problems with UART0. does any body help me tnk in advance
lpc2290 user manual and isp
2005-08-09 by Joerg Sommer
Hi, I search a user manual for the lpc2290. Exists one? Where can I find it? Currently I use the manual for 2292 and 2294. Are there any differences to the
Re: measuring pulse width
2005-08-08 by philips_apps
Hello Gus, LPC2000 samples every CAPx.y input in use at the rate of pclk. It takes two consecutive CAPx.y samples for a transition to be detected (i.e. if the
Re: [lpc2000] measuring pulse width
2005-08-08 by thomas.kuschel@anton-paar.com
Hi Gus, I use to capture pulses for measuring own-build semi-digital signals with different pulse-width and different periods to encoding information. My
MIDI with the LPC UARTs
2005-08-08 by rodgersfan1253
Has anyone out there done any MIDI interfacing using the UARTs on an LPC? If so, any pearls of wisdom? Thanks in advance... Tom Nelson
Re: Performance using LPC2210 & External Memory
2005-08-08 by lpc2100_fan
Hi Fabio, honestly I do not like MIPS but for the lag of a better most simple measure, running directly from a 90 ns external Flash 16-bit wide in Thumb mode
measuring pulse width
2005-08-08 by Gus
Hello, What is the shortest pulse you can mesure on LPC capture module? I am trying to measure some pulses using the capture hardware on LPC chips. The
Re: Performance using LPC2210 & External Memory
2005-08-08 by fcervone1
Bob, Tks for your reply. I am really convinced with your answer. For instance, if I use a Flash Memory 90nsec time access and I am running @75MHz LPC2220 do
RE: [lpc2000] 2214 board, anyone?
2005-08-08 by Mark Crow
I might be able to help. Give me some details and let s see what I can do. Mark ... From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com]On Behalf Of
Re: [lpc2000] 2214 board, anyone?
2005-08-08 by Franci Koncar
I can run your tests on 2212, if this can help you. Frenki ... __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail
Low cost complete ARM Evaluation Kit
2005-08-08 by Michael Weseloh
Hello All, Thought that this would be of interest: Oki Semiconductor Incorporates Unique Features to Deliver Industry s Lowest Cost, Easy to Use ARM-based
Re: EMC flash memory programming
2005-08-08 by catstransport
... write ... flash to ... right? ... I Have tried it but still I see only a empty flash when I read the address. I have download the st flashdrivers for 16
Re: »Ø¸´£º [lpc2000] vpb divider when cpu clock speed is at max...
2005-08-08 by DECwiz (Fred van Kempen)
There is no limit on PCLK, other than it can never exceed CCLK, because of the divider. With XTAL=14.7M, the PLL set to 4 (CCLK= ~59M), the VPB set to 1 gives
回复： [lpc2000] vpb divider when cpu clock speed is at max...
2005-08-08 by g pf
Yes, of couse. we have do this in my desing. It works fine. ... Hello to you all, doing my first post here... The Philips LPC 21xx user manual carefully
Re: EMC flash memory programming
2005-08-07 by catstransport
... thanks that is the reaction that I wanted to hear. Tomorrow I will try it. remco
2214 board, anyone?
2005-08-05 by DECwiz (Fred van Kempen)
Hi, Is there someone on the list who could run one of my programs on their 2214 board for me? I need to test something, and don t have a 2214 here... Thanks,
Re: Performance using LPC2210 & External Memory
2005-08-05 by lpc2100_fan
Hi Fabio, that depends on a few factors: 1. access time of the Flash 2. ARM mode or Thumb mode 3. Between 8-bit and 16-bit bus almost exactly the factor of 2