big-endian mode
2004-07-12 by Leighton Rowe
I understand that lpc21xx configures arm7 processor to work in little-endian mode. Is it possible to change that around so that the processor works in big-endian? If yes, how?
Thread
big-endian mode
RE: [lpc2000] big-endian mode
2004-07-12 by Paul Curtis
It's fixed little-endian. No big-endian mode, sorry. -- Paul.
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> -----Original Message----- > From: Leighton Rowe [mailto:leightonsrowe@...] > Sent: 12 July 2004 13:35 > To: lpc2000@yahoogroups.com > Subject: [lpc2000] big-endian mode > > I understand that lpc21xx configures arm7 processor to work > in little-endian mode. > > Is it possible to change that around so that the processor > works in big-endian? If yes, how? > > > > ------------------------ Yahoo! Groups Sponsor > --------------------~--> > Yahoo! Domains - Claim yours for only $14.70 > http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/dN_tlB/TM > -------------------------------------------------------------- > ------~-> > > > Yahoo! Groups Links > > > > > > >
Re: big-endian mode
2004-07-12 by Leighton Rowe
Thanks Paul,
I wasn't aware of little-endian mode until I was reading large union
buffers like:
union {char a[32]; short b[16];};
While debugging, the storage order for array "b" seem to be the
reverse of array "a". This kinda affected my command parsing
routines, which assumed that the words read were big-endian. Oh
well, there goes my chance of reading large word buffers with ease.
Leighton
--- In lpc2000@yahoogroups.com, "Paul Curtis" <plc@r...> wrote:Show quoted textHide quoted text
> It's fixed little-endian. No big-endian mode, sorry. > > -- Paul. > > > -----Original Message----- > > From: Leighton Rowe [mailto:leightonsrowe@y...] > > Sent: 12 July 2004 13:35 > > To: lpc2000@yahoogroups.com > > Subject: [lpc2000] big-endian mode > > > > I understand that lpc21xx configures arm7 processor to work > > in little-endian mode. > > > > Is it possible to change that around so that the processor > > works in big-endian? If yes, how? > > > > > > > > ------------------------ Yahoo! Groups Sponsor > > --------------------~--> > > Yahoo! Domains - Claim yours for only $14.70 > > http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/dN_tlB/TM > > -------------------------------------------------------------- > > ------~-> > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > >
RE: [lpc2000] Re: big-endian mode
2004-07-13 by Joseph Goldburg
-----Original Message-----
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From: Leighton Rowe [mailto:leightonsrowe@...]
Sent: Tuesday, 13 July 2004 12:07 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] Re: big-endian mode
Thanks Paul,
I wasn't aware of little-endian mode until I was reading large union
buffers like:
union {char a[32]; short b[16];};
While debugging, the storage order for array "b" seem to be the
reverse of array "a". This kinda affected my command parsing
routines, which assumed that the words read were big-endian. Oh
well, there goes my chance of reading large word buffers with ease.
Leighton
--- In lpc2000@yahoogroups.com, "Paul Curtis" <plc@r...> wrote:
> It's fixed little-endian. No big-endian mode, sorry.
>
> -- Paul.
>
> > -----Original Message-----
> > From: Leighton Rowe [mailto:leightonsrowe@y...]
> > Sent: 12 July 2004 13:35
> > To: lpc2000@yahoogroups.com
> > Subject: [lpc2000] big-endian mode
> >
> > I understand that lpc21xx configures arm7 processor to work
> > in little-endian mode.
> >
> > Is it possible to change that around so that the processor
> > works in big-endian? If yes, how?
> >
> >
> >
> > ------------------------ Yahoo! Groups Sponsor
> > --------------------~-->
> > Yahoo! Domains - Claim yours for only $14.70
> > http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/dN_tlB/TM
> > --------------------------------------------------------------
> > ------~->
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
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[Non-text portions of this message have been removed]RE: [lpc2000] Re: big-endian mode
2004-07-13 by Paul Curtis
> -----Original Message----- > From: h s [mailto:h7242004@...] > Sent: 13 July 2004 11:39 > To: lpc2000@yahoogroups.com > Subject: RE: [lpc2000] Re: big-endian mode > > The IAR compiler has a project option which supports both the > big/little endian data format. > > Other compilers may also, support similar option. Yeah, and absolutely useless unless your hardware can run in big-endian mode, which the LPC can't. -- Paul.
RE: [lpc2000] Re: big-endian mode
2004-07-13 by h s
The IAR compiler has a project option which supports both the big/little endian data format. Other compilers may also, support similar option. Joseph Goldburg <joseph.goldburg@...> wrote:
Show quoted textHide quoted text
-----Original Message-----
From: Leighton Rowe [mailto:leightonsrowe@...]
Sent: Tuesday, 13 July 2004 12:07 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] Re: big-endian mode
Thanks Paul,
I wasn't aware of little-endian mode until I was reading large union
buffers like:
union {char a[32]; short b[16];};
While debugging, the storage order for array "b" seem to be the
reverse of array "a". This kinda affected my command parsing
routines, which assumed that the words read were big-endian. Oh
well, there goes my chance of reading large word buffers with ease.
Leighton
--- In lpc2000@yahoogroups.com, "Paul Curtis" <plc@r...> wrote:
> It's fixed little-endian. No big-endian mode, sorry.
>
> -- Paul.
>
> > -----Original Message-----
> > From: Leighton Rowe [mailto:leightonsrowe@y...]
> > Sent: 12 July 2004 13:35
> > To: lpc2000@yahoogroups.com
> > Subject: [lpc2000] big-endian mode
> >
> > I understand that lpc21xx configures arm7 processor to work
> > in little-endian mode.
> >
> > Is it possible to change that around so that the processor
> > works in big-endian? If yes, how?
> >
> >
> >
> > ------------------------ Yahoo! Groups Sponsor
> > --------------------~-->
> > Yahoo! Domains - Claim yours for only $14.70
> > http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/dN_tlB/TM
> > --------------------------------------------------------------
> > ------~->
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
Yahoo! Groups Sponsor
ADVERTISEMENT
<http://us.ard.yahoo.com/SIG=1297nkmga/M=295196.4901138.6071305.3001176/
D=groups/S=1706554205:HM/EXP=1089727798/A=2128215/R=0/SIG=10se96mf6/*htt
p://companion.yahoo.com> click here
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