unsigned long versus unsigned int on ARM7
2005-11-09 by rtstofer
I have noticed that many folks are using unsigned long for 32 bit entities and I got to wondering if I am doing things wrong (again!) Looking at limits.h I
Messages
Browse messages
Page 125 of 329 · 16407 messages matched
Re: [lpc2000] WIGGLER and cable length
2005-11-09 by Ake Hedman, eurosource
... OK thanks Leon. I also have a 2 m cable. Good to know that this works for at least one person. Cheers /Ake -- ... Ake Hedman (YAP - Yet Another Programmer)
Re: UBYTE alignment problem in structure
2005-11-09 by brendanmurphy37
Hi, Check out a recent post - message 10244. Your example simply re-enforces the point I made there: trying to map hardware registers onto
Re: [lpc2000] WIGGLER and cable length
2005-11-09 by Tom Walsh
... Cable lengths are a problem with JTAG wigglers (JTAG in general, even high end units could have that problem). When using a wiggler on an SA1100 project
RE: [lpc2000] UBYTE alignment problem in structure
2005-11-09 by Gromann, Klaus
Hi Tom, depends on the processor you have. I use an LPC 2292 and this one don t have an alignement exception. best regards Klaus ... From:
Re: [lpc2000] UBYTE alignment problem in structure
2005-11-09 by Tom Walsh
... Oh it is a common problem for an 8 bit programmer coming into a 32bit world, not just ARM but other processors. There was a series of emails, recently,
Re: [lpc2000] WIGGLER and cable length
2005-11-09 by Leon Heller
... From: Ake Hedman, eurosource To: Sent: Wednesday, November 09, 2005 2:40 PM Subject: [lpc2000] WIGGLER and
Re: [lpc2000] UBYTE alignment problem in structure
2005-11-09 by Tom Walsh
... No, you cannot do that. *THAT* is what is called Alignment Fault and an exception is thrown. TomW ... -- Tom Walsh - WN3L - Embedded Systems Consultant
RE: [lpc2000] fixed address variable
2005-11-09 by Gromann, Klaus
Sure, no problem the best way is to use a macro instead of a variable : i.e.: definition : #define fix_adr (*(volatile unsigned long *)0xe0000000) code :
WIGGLER and cable length
2005-11-09 by Ake Hedman, eurosource
Hi all, I never got my Olimex Wiggler to work correctly even after patching the adapter and trying out all suggestions on the net. Last possibilities is that
PWM & UART at the same time
2005-11-09 by Andy
Hallo Da mein englisch nicht sehr gut ist, versuch ichs einfach mal auf deutsch...:-) Plattform: LPC2129 auf dem Olimex-LPC-P212X Mein Problem: Ich erzeuge an
fixed address variable
2005-11-09 by szemzoandras
Hello, Is it possible to place a variable to a fixed memory location in gcc, like in keil, i mean: unsigned int dd _at_ 0x81000000; Or I can only do it with
RE: [lpc2000] UBYTE alignment problem in structure
2005-11-09 by Gromann, Klaus
attribute packed should help. But take care, the ARM7 processor can t access 32-bit wide to an address that is not 32-bit aligned. If you try to read 32 bit
Pwm disabled if serial's not attached?
2005-11-09 by -=Quequero=-
Hello all, I m having a strange problem with an LPC2138 (Olimex board H2138), my PWM outputs are working fine, but if serial cable is not attached to the
UBYTE alignment problem in structure
2005-11-09 by lehmannjluc
I have the following structure definition: ========================= #define PTR_ATTR #define VPC3_PTR PTR_ATTR * typedef struct { UBYTE
PWM & UART at the same time
2005-11-09 by andypselon
Hallo Da mein englisch nicht sehr gut ist, versuch ichs einfach mal auf deutsch...:-) Plattform: LPC2129 auf dem Olimex-LPC-P212X Mein Problem: Ich erzeuge an
Re: [lpc2000] Re: Uart receive timeout Interrupt?
2005-11-09 by Peter Homann
Hi Guille, From the schematic, P014 should by pulled low by the Philips utility via pin 7 of com port 0? Cheers, Peter. ... -- ... Web: www.homanndesigns.com
Re: Uart receive timeout Interrupt?
2005-11-09 by Guillermo Prandi
Hi, Peter. Have you verified your P0.14 is low during reset? It is required to automatically enter ISP if the ROM checksum is good (i.e., the ROM is not
Re: [lpc2000] Uart receive timeout Interrupt?
2005-11-09 by Peter Homann
Hi Sten, Thanks for your reply. Yes, this is what I m doing now with the PIC chip and was expecting to have to do on the Arm. As I m new to it, I wasn t sure
Re: [lpc2000] Uart receive timeout Interrupt?
2005-11-09 by Sten
... Hello Peter, this interrupt was not designed for your needs. It should prevent a communication from being stalled if some characters are trapped in queue
Help! My Keil MCB2130board has stoped talking to the Philips flash utility.
2005-11-09 by Peter Homann
Hi, I ve managed to stuff up something, so that my MCB2130 board won t communicate with the Philips download utility. I m not sure what I ve done. I may have
Uart receive timeout Interrupt?
2005-11-09 by Peter Homann
Hi, Thanks for the offer. I d be interested in learning how to implement Modbus on the LPC. Anything you can send will be a big help as I m new to the Arm
Re: New to microprocessor
2005-11-09 by Eric
... Thanks for your reply. The only *driver* of Moschip is to set the serial port to the PCI (http://www.moschip.com/data/products/NM/linux.zip). I don t know
Re: Uart receive timeout Interrupt?
2005-11-09 by radim100
... LPC2138 ... occurred ... 3.5 ... the ... character in ... receive ... not ... a ... If you are interested in MODBUS slave for LPC213X email me and I can
New file uploaded to lpc2000
2005-11-09 by lpc2000@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the lpc2000 group. File :
Re: [lpc2000] Re: LPC2000 to keyboard (or keypad... or...?)
2005-11-09 by Tom Walsh
... Try this, this is a really good page about the keyboard: http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/keyboard/atkeyboard.html I just goolged it with:
Re: [lpc2000] recommendation for an arm development board?
2005-11-09 by Jonathan Khoo
Hi Michael, ... [sniped] I see. I looked at arm.com and lots of the documentation is for ARM7 which is why I asked that question. I think I will compare the
Re: [lpc2000] recommendation for an arm development board?
2005-11-09 by Jonathan Khoo
... I see.... thanks man!
Re: [lpc2000] recommendation for an arm development board?
2005-11-09 by Michael Anburaj
Jonathan, My Views: Not really, ARM7s have a lot of good applications too. Anything to do with internal memory (ARM core synthesized on FPGA & such),
Re: [lpc2000] recommendation for an arm development board?
2005-11-09 by 42Bastian Schick
Jonathan ... I can t talk for the embedded industry but I guess the ARM7TDMI will be the 8051 of the 21th century :-) Think of the 1.5USD LPC2000s versions.
Re: [lpc2000] recommendation for an arm development board?
2005-11-09 by Jonathan Khoo
Hi guys, ... Thanks for the info! Is the embedded industry going towards ARM9? -- cheers, jonathan khoo
Uart receive timeout Interrupt?
2005-11-09 by Peter Homann
Hi, I am migrating a serial communications interface (Modbus) to a LPC2138 processor. The Modbus spec defines that an end of message has occurred when a period
Re: LPC2000 to keyboard (or keypad... or...?)
2005-11-09 by radim100
... connector. ... confident ... out ... easy ... itch ... Check this link : http://www.multilabs.net/Products.html Radim.
Re: [lpc2000] LPC2000 to keyboard (or keypad... or...?)
2005-11-09 by Tom Walsh
... PS/2 keyboards are basically an AT keyboard with a smaller connector. IIRC, AT keyboards use a three wire protocol. Anything you find relating to AT
Re: LPC2000 to keyboard (or keypad... or...?)
2005-11-09 by seangra
Let me elaborate. I already know about the following links: http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/keyboard/atkeyboard.h tml
LPC2000 to keyboard (or keypad... or...?)
2005-11-09 by seangra
Does anyone have any good schematics/code for connecting a PS/2 keyboard to one of these uC s? Alternatively does anyone know of any good small keypads that
Re: Looking to buy compiler
2005-11-09 by Alan Strickland
I m aware of what IAR provides. I have worked with IAR. In fact I had compiled and ran my code under IAR when I got bit. However, the code had been
Re: [lpc2000] Re: Non-aligned access?
2005-11-09 by Charles Manning
... How are you processing interrupts? Perhaps posting your wrapper code (ie the assembler calling the C ISRs). There are two things that I can see causing
Re: [lpc2000] Re: Looking to buy compiler
2005-11-09 by Mike Nelson
IAR s Embedded Workbench for ARM provides the bit field definitions for the Special Function Registers for most popular derivatives in C header files. No need
Re: Non-aligned access?
2005-11-09 by rtstofer
... Maybe the stack size? Richard
Re: Non-aligned access?
2005-11-09 by ee_gary
Definitely seems interrupt related... When I disable the timer interrupt, the interrupt driven spi works great. When I disable the spi interrupt, the
Re: [lpc2000] Re: Non-aligned access?
2005-11-09 by Tom Walsh
... I had that, I grapped some project source of an example program and used that as the foundation for my project. I got bit by an __attribute__ ((naked))
Re: [lpc2000] Re: Looking to buy compiler
2005-11-09 by Charles Manning
... You are partially right. The behaviour is partially ARM defined, and partially Philips defined. A byte intruction won t give a data abort (except for a bad
Re: Looking to buy compiler
2005-11-09 by Alan Strickland
I agree, avoid using bit fields. How bit fields are implemented is compiler dependent. Granted many (all?) compilers give the option of signed/unsigned and
Re: [lpc2000] Re: Non-aligned access?
2005-11-08 by Charles Manning
... That would be my first though too. Either that or a stack corruption causing the register to be nuked, but that would probably be less likely. Is 40000241H
Re: Non-aligned access?
2005-11-08 by Guillermo Prandi
Just an idea: perhaps interrupt routines are not saving/restoring all the registers correctly? Guille ... ~10 ... interrupt ... or ... abort. ... interrupt ...
Re: Non-aligned access?
2005-11-08 by ee_gary
... The instruction at 200H was: LDR R3,[R1] It was part of this function: void wait (void) { unsigned long i; i = timeval; while ((i + 10) != timeval); }
Re: [lpc2000] Jtag for arm!!
2005-11-08 by Piotr Zbysinski - EP(H)
http://www.btc.pl/index.php?id=zl14prg Piotr ... From: Diego Stefanello To: Sent: Tuesday, November
Re: [lpc2000] Jtag for arm!!
2005-11-08 by Leon Heller
... From: Diego Stefanello To: Sent: Tuesday, November 08, 2005 7:03 PM Subject: [lpc2000] Jtag for
Re: Jtag for arm!!
2005-11-08 by radim100
... The Wiggler Compatible JTAG adapter schematics can be found on http://www.micronix.ca/catalog . Look for JTAG02 specs and schematics . It can be also