Lpc2000

Thanks, but...

I checked the .map file and it shows the same thing, the bss area ends
at address 0x40001748.

The ram area ranges from 0x40000000 to 0x40003FFF and the stack is at
the end of the ram area, and total stack size is below 0x500 bytes.

So as described below, it does't look like is an overlap conflict, but
    main() refuses to start unless commenting out the clear bss code
from startup.s.  

I can't even get some dummy code just setting the leds - using MBC2100
dev board - followed by an eternal looop at beginning of main() to
run, unless commenting out the code for clearing bss section.

Kind Regards

/ DA



--- In lpc2000@yahoogroups.com, "xjag74" <detlef.weidner@w...> wrote:
> Hi,
> 
> have a look to the Map-file.
> Check if the bss area is within the range of the RAM memory area 
> (below the stack area).
> 
> regards
> xjag
> 
> 
> --- In lpc2000@yahoogroups.com, "arkeryd" <arkeryd@y...> wrote:
> > Hi,
> > 
> > After adding several new source files to my application for
LPC2129,
> > it hangs when jumping from startup.s to main(). 
> > 
> > The first thing that came to my mind was that perhaps too much ram
> > memory was now used.
> > However, after checking by running startup.s trough the debugger,
it
> > doesn't seem like that.
> > I use the default startup.s for LPC2129.
> > 
> > The last address used by the .data- and .bss-sections
> > (variables/arrays) in my application is 0x40001748.
> > 
> > And this should not collide with stack either, as I use the
default
> > stack address and sizes:
> > Interrupt Mode size: 0x80
> > User/system mode size: 0x400
> > And just 4 bytes size in other modes.
> > Top of stack address: 0x40004000.
> > 
> > The weird thing is even though no memory collision should occur,
the
> > application starts if I comment out the "Clear .bss section code"
in
> > startup.s, so it must somehow be some collision, but I don't
> > understand why.
> > 
> > # Clear .bss section (Zero init)
> >                 MOV     R0, #0
> >                 LDR     R1, =__bss_start__
> >                 LDR     R2, =__bss_end__
> > LoopZI:         CMP     R1, R2
> >                 STRLO   R0, [R1], #4
> >                 BLO     LoopZI
> > 
> > Any input to clear my confusion would be much appreciated! :)