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Endian
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 83 threads matching "endian"
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Endianness does not apply to byte
karthikbg - 05:37 17-11-06
Hi,
I find that regardless of what the byte Endian order is, the bits
within
bytes are always in Big-Endian format.
For instance, 1 is always stored in a byte as 000000012 no matter what
platform.
But, this is in violation to the Endianness concept as little endian
internally a big-endi...
Big-Endian vs. Little-Endian
Everett M. Greene - 22:21 20-08-04
At the risk of starting a flame war, which choice have people
really made with regard to Little-Endian vs. Big-Endian for
those processors where it's a design choice (ARM, PowerPC,...)?
I'm asking in the context of using such processors in embedded
applications where compatibility with anything ...Re: OSE EPSILON on MAC7100 exactly MAC7111 LCEVB
firefox78 - 07:01 10-07-06
Yes it's right what you say, but I have set my IAR as big endian and
OSE Epsilon to big endian. The board doesn't run anyway. I also tryed
with the last IAR 4.40a but noting too.
Best regards.
Anton Erasmus ha scritto:
> On 5 Jul 2006 12:52:56 -0700, "firefox78"
> wrote:
>
> > I...IXP425 Little Endian/ Big Endian
A Beaujean - 06:11 04-01-05
Having developed a new IXP425 based card, we now face the problem of
writing the BSP for it.
Actually, the main problem at this very moment is understanding the
real issues with Endianess.
Indeed, primary tests made with the ARM MultiIce emulator appear to
clearly indicate that Big Endian i...Testing little/big endian issues on an Intel PC
Sachin Garg - 18:59 27-07-07
I need to test code for some compression algorithms for any possible
little/big endian issues that I might have left in there.
As development was done on an Intel desktop, what is the best way to
test it out without having to buy big-endian hardware. Can some
emulator etc be used for this?
...Re: Interview Embedded Software Questions
karthikbg - 11:27 17-11-06
Why does Endianness depend on Bit_order ?
Why Bit_order is always of Big Endian in a Byte irrespective of the
Little Endian or Big Endian CPU design?
A really good question to ask.
It will tell whether the candidate is aware of the Endiannes,
Byte_Order, Bit_Order and Bit manipulations.
...Little endian on IO output
Steven P - 03:21 01-10-06
Good Morning:
I have a project using a 32bits little endian processor but with only
16 bits data bus. How will it behave when it puts data on the data bus.
also in little endian mode? And if the data type has length longer than
the IO Data bus, how will it normally behave? Does endianness only...PowerPC MPC5200B, changing mode to run in little endian
Taran - 01:05 22-08-07
Hi,
We are using Lite5200B eval board, out software is compiled using the
Windriver diab 5.3.1.0 with the 5200B patch. We are using the
WindRiver ICE for downloading the executable to the board and stepping
through.
We have our software with the MPC5200B running in default big endian
mode....Looking for ARMARCH5/6 Eval board that supports big and little endian.
21:44 02-02-06
As it says, looking for a reasonably priced eval board(s) that support ARM v5
and/or v6 CPUs big and little endian. Prefer the CPU have MMU.
TIA
....rodata format in elf
07:19 28-12-06
hai all...
my purpose is to parse an ELF file in order to obtain the values of
some constants(read only data)...
i have acessed the .rodata section..what i want to know is, while
calculating the CRC of that particular data obtained form the .rodata
section will be same for both little endian an...Re: Change from 32 to 8 arithmetic in a security application
Paul Keinanen - 02:30 12-09-06
On Mon, 11 Sep 2006 16:57:25 +0200, "Mad I.D."
wrote:
> On 11 Sep 2006 04:09:24 -0700, Ulf Reiman wrote:
> > Hi!
> > How do a change a security application done with 32 bits arithmetic to
> > 8 bits arithmetic.
> > It was build for a PC, but a want to use it in a microcontroller. What...Re: gcc for AT91SAM7S64?
Peter Dickerson - 07:33 22-09-05
"Andy" wrote in message
news:HYydnabrpLuOMqzeRVn-1g@giganews.com...
> Hello,
>
> Is any one using gcc on this part?
> I have used gcc with a 7520 Netsilicon ARM7, but I wasn't sure if that
means
> it will work with any ARM7.
> I assume this should be the same instruction set, but ha...VME and Big Endian
Mark_Galeck - 19:48 11-03-08
Hello, I want to access from a Big endian CPU, a VME bus peripheral
card. Let's say for example, I want to write a value that ends up in
a register on the card, at address 0x2, in the register I want to have
0x1234, in other words, in bits 0-7 of the register I want to have
0x34, and in bits 8...Opinions on 16-bit checksums.
Kermit - 18:17 24-08-04
Hello all,
Since I see that Endianess is a current topic, I'd like to ask a question
concerning it and calculating 16-bit checksums. I've never seen a standard
anywhere that describes exactly what a checksum is.
However, I have mainly seen them calculated in one of three ways.
1) Simply c...Motor info needed
Everett M. Greene - 23:34 25-06-06
Can anyone point me to a web site for the Dayton that
makes electric motors. I've done the Web searches, but
all the hits get hijacked to various ebusinesses, none
of which have a link to the manufacturer's site (if any).
[So much for "Google's your friend"!]
--------------------------------...Re: C embedded programming books?
John Devereux - 16:55 15-05-06
"Le Chaud Lapin" writes:
> Steve at fivetrees wrote:
> > > I suspected that this is the reason. Certainly you will agree that
> > > this is hardly an issue if you're already comitted to the idea that you
> > > are doing hardware-based I/O?
> >
> > Unless I'm misunderstanding you...Defining the endianness for arm7 MCU
Daniel - 04:51 23-04-04
Hi there,
I am struggling with a problem on my lh75411 MCU (arm7) which concerns
the endianness.
I observed that the endianness changes sometimes when uploading a srec
file
after reset to the MCU. I am using the following script for the
M*craigor
OCD tool:
conn
endian little
CPS...Endianess problem
sid1977 - 05:38 08-10-07
Hi,
I am writing a driver for a ethernet controller. The controller is
connected to the io memory and expects data to be in the Little endian
format (will call it LE now and BE for big endian). The main cpu which
runs the driver code is a BE machine. During the startup I write the
descriptors int...Re: PC104 addressgin
Jim Stewart - 15:24 17-02-05
Pygmi wrote:
> "Jim Stewart" wrote in message
> news:KK-dnZdyPd_BK47fRVn-rQ@omsoft.com...
>
> > MikeD wrote:
> >
> > > using PC104 with 16bit configuration. What size is an address? IE. if
> > > i write 0xABCD to address 0x1234, did I infact write AB to 0x1234 and
> > > CD to 0x12...Re: Floating point numbers and endian ness??
Paul Keinanen - 01:27 30-04-08
On Tue, 29 Apr 2008 13:09:56 -0500, Grant Edwards
wrote:
> On 2008-04-29, Paul Keinanen wrote:
> > On Tue, 29 Apr 2008 00:07:01 -0400, Robert Adsett
> > wrote:
> >
> >
> > > I vaguely remember seeing a protocol that exhibited both little and big
> > > endian elements but that ...AVR Harvard architecture -- worst of both worlds?
Everett M. Greene - 00:12 08-09-07
And we won't even get into Little-Endian vs. Big-Endian...
An "interesting" situation arises when dealing with constants in programs.
One would like to put these in ROM but with a Harvard architecture, one
can't access the locations as directly (if at all) as one can if the values
are in RAM. ...Re: New microprocessor architecture
Grant Edwards - 23:45 05-03-07
On 2007-03-06, Jim Granville wrote:
> and that 'other stuff' is getting easier to clone these days.
>
> Freescale are about the spin their Coldfire-V1 core,(and did a new
> Starcore recently), Zilog have Zneo, MIPS refuses to go away, Atmel have
> AVR32, and DSP devices from Analog ...Wishbone, TSK3000 and endianness problem
argee - 18:59 16-04-08
Hi all,
I'm working on interfacing a custom IP core to a TSK3000 (Altium's
P/H:MIPS-like soft processor) over WISHBONE bus and it seems I've run
into some endianness problems. I've always been confused by endianness
issues and now, after a few days of debugging both hardware and
software, my ...Newbie: arm-elf-gcc generated asm question
Ken Barlow - 05:33 28-05-04
Hi,
I have started evaluating the GNUARM tools for a LPC210x target
(little-endian) and come across the following which is odd to me.
With ul defined as:
unsigned long *ul;
The function function1 returns a pointer to void. For the following line,
ul = ( unsigned long * ) function1();
...Re: 32bit PICs announced
certsoft - 15:31 06-11-07
On Nov 5, 4:59 pm, "FreeRTOS.org" wrote:
> http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeI...
Little endian - yuck :)
...Re: A quick c programming survey question
Paul Keinanen - 02:45 17-05-04
On Sat, 15 May 2004 11:03:01 -0700, "Neil Bradley"
wrote:
> > a) Create a 'bits' structure for each register and access using
> > the dot or arrow operator.
>
> Never. For two reasons:
>
> 1) Bit field "direction" is nondeterministic on non byte size operators and
> often is a sou...Re: 24-bit SPI?
David - 03:22 28-04-05
On Thu, 28 Apr 2005 08:16:15 +0200, orc wrote:
> "David" wrote in message:
> > The usual method is to send three 8-bit transfers after each other,
> > holding the chip select low during the transfer. Some SPI controllers
> > (don't know about ARM chips) can do this automatically, but i...Re: Direction of Stack Growth
Walter Banks - 08:36 22-10-07
It doesn't matter much for subroutine return stack.
For argument passing a stack that grows downwards may
have some advantages. The SP in some cases may be used
as a index register for stack access or passed to a index
register for stack access and all of these accesses will
have a positive o...Re: Using "mov DPTR, #data16" in 8051 ASM
Gary Kato - 08:43 25-10-04
If two bytes,
mov A,index
mov DPL,A
mov A,index+1 ; assuming 8051 is little-endian
mov DPH, A
...Re: Programming Flash AM29F200B
Bob - 19:15 21-03-05
wrote in message
news:d1nkh6$pvm$1@nemesis.news.tpi.pl...
> It cooperates excellent with programmer but i am trying to write data
using
> microcontroller. Flash requires 4 cycles to write a bite/word:
> addr/data = 555/AA , 2AA/55, 555/A0, PA/PD
> I do above commands and each cycle i ap...Re: 10/100 Ethernet Chips
Tauno Voipio - 15:51 30-07-04
"Jeremy Bentham" wrote in message
news:ucckg0hm5i3t0l42mb3a7dpb8r2p16j0nh@4ax.com...
> Jeremy Bentham wrote:
>
> > 32-bit additions are only an advantage if you're doing the checksum in
> > C. When using assembly language they'd actually be slower than 16-bit,
> > since you have t...Re: Shift 'em bits
Paul Keinanen - 13:51 19-11-04
On Fri, 19 Nov 2004 11:20:46 +0100, "WaldemarIII"
wrote:
> Is there an atomic way to shift 64 bits either left or right?
> Shifting a double (8 bytes) doesn't work. Compiler won't
> allow it. Embedded assembly is out of the question and
> and a C function conating a loop shifting the ind...whose cc recognises byte moves
Pat LaVarre - 11:27 15-01-04
> > > > Newsgroups:comp.arch.embedded
> > > > ...
> > > > using the usual compilers for 8-bit
> > > > embedded chips has been a let down
> > > ...
> > > Do you have any concrete examples?
> > > ...
Lately elsewhere I saw people mocking the practice of writing explic...Re: STR912 ARM with SSD1906 TFT controller
Anton Erasmus - 02:38 16-01-07
On Mon, 15 Jan 2007 21:41:25 +0000, Spen wrote:
> > I visited Ramtex web page, but they don't have a demo library.
> > That's a shame. I'm starting to write my own library, but graphic
> > functions are very heavy to deal with.
>
> You have to buy the lib from Ramtex - not bad pricing...Alchemy AU1550 board: establish endianness
Roman Mashak - 08:29 20-09-04
Hello, All!
Could you please explain me the process of establishing the endianness on
Alchemy board? This board has the DIP switches for establish endian mode,
and I'd like to understand how to determine the endianness from software.
On-board CPU is MIPS32.
With best regards, Roman Mashak...Little Endian: What would be the no stroed at memory location 0x0001
2005 - 15:02 28-11-06
Hi
It is given that the number 0x0abc1234 is stored in a four-byte
integer, starting a location memory 0x0000.
What would be the no stroed at memory location 0x0001?
Thanks
...Re: SD Card FAT support issues (dosfs, fatfs,fatlib)
larwe - 13:36 10-09-06
David Brown wrote:
> I was thinking about that possibility. However, that only has an effect
> if you've got a structure like:
>
> stuct {
> uint8 byte1;
> uint16 word1;
> uint8 byte2;
> }
>
> If you are facing something like that, things are going to go wrong no
> matt...Re: embedded questions!!!
Chris Hills - 13:46 27-12-05
In article ,
#define writes
> Hello All,
>
> Some questions were bugging me from quite some time. Any answers!
> please share.
>
> 1. GIven an .EXE is there a way to find how many global varibale it
> uses?
Yes, use a Logic Analyser with a read through trace. (Must be read
throug...Re! XCHG instruction: load register AX with a 1
Wilco Dijkstra - 17:24 28-11-06
"2005" wrote in message
news:1164745288.708611.241670@j44g2000cwa.googlegroups.com...
> Hi
>
> In the XCHG instruction, why would be load register AX with a 1 prior
> to excution of XCHG - is this
> - to insure that the "Flag" variable will be set to 1 after the XCHG or
> - the X...Re: problem accessing a specific CF Card (Compact Flash) in 8-bit TrueIDE mode
alyc - 08:13 15-01-06
"Rufus V. Smith" wrote in message
news:43c6dbe8$0$30406$6d36acad@taz.nntpserver.com...
> We have recently come across a CF card
> (16Mb, branded "Choice Only", model C16ZH)
>
> Which we are not able to read, all signs being that it is not switching
> into 8-bit mode upon request....