Lpc2000

George,

I don't know the answer to your specific question off-hand. However, 
I'm sure you'd find it helpful to get some documentation on ARM 
processors.

One of the problems with micros that use standard (as opposed to 
proprietary) cores, such as ARM, is that the manufacturers tend not 
to repeat documentation that can be found elsewhere. This is a bit 
inconvenient.

The best source for information you require is direct from ARM. 
Check out the ARM7TDMI Technical Reference Manual, which can be 
found at: 

http://www.arm.com/documentation/ARMProcessor_Cores/index.html

This covers all the LPC2xxx series.

The standard reference for ARM is the "ARM ARM" (real title: "ARM 
Technnical Reference Manual"). Unfortuntely, they expect you to pay 
for this. It's a really useful reference to have though. See:

http://www.amazon.com/gp/product/0201737191/sr=8-
1/qid=1140242347/ref=pd_bbs_1/102-6410308-4751357?%5Fencoding=UTF8

Hope this helps.

Brendan

--- In lpc2000@yahoogroups.com, "George M. Gallant, Jr." 
<ggallant571@...> wrote:
>
> Is it possible to load the SPSR in the lpc2214.
> 
> For example:
> 
>                    mov    r0, #0xD0           ;set previous mode 
to user
>                    msr     spsr_cxsf, r0
> 
> I do this at boot and then read and display CPSR & SPSR
> 
>         CPSR = 0x000000D3
>         SPSR = 0x800000D3
> 
> George
> 
> On Thu, 2006-02-16 at 18:47 +0000, brendanmurphy37 wrote:
> 
> > 
> > The suffix to CPSR refers to which field(s) of the CPSR is 
> > rereferenced (you can specify one or more). Defined fields are:
> > 
> > c - control
> > f - flags
> > s - status
> > x - extension
> > 
> > Thus., for example, you can update only those parts of the CPSR 
that 
> > are of interest. See a description of the CPSR for details.
> > 
> > Brendan
> > 
> > --- In lpc2000@yahoogroups.com, "George M. Gallant, Jr." 
> > <ggallant571@> wrote:
> > >
> > > I notice in many assembly language examples the use of CPSR_c
> > > & CPSR_cxsf but donot understand the differences.
> > > 
> > > Thanks,
> > >     George
> > > 
> > > 
> > > [Non-text portions of this message have been removed]
> > >
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > SPONSORED LINKS 
> > 
> > Microcontrollers 
> > Microprocessor 
> > Intel microprocessors 
> > Pic microcontrollers 
> > 
> > 
> > 
> > 
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