Re: ARM7TDMI problem

[Paweł Sikora <pluto at agmk dot net>]

On Thursday 13 of October 2011 07:37:26 Hadi Aminzadeh wrote:
> 2011/10/12 Paweł Sikora <pluto@agmk.net>:
> > On Wednesday 12 of October 2011 18:41:42 Hadi Aminzadeh wrote:
> >> On Tue, Oct 11, 2011 at 2:55 PM, Pawel Sikora <pluto@agmk.net> wrote:
> >> > On Tuesday 11 of October 2011 14:35:30 Hadi Aminzadeh wrote:
> >> >> Hi Dear,
> >> >>
> >> >> I have a LPC2478 arm processor and want to use gcc to cross compile my
> >> >> code in x86 for LPC2478
> >> >> I use arm-linux-gnueabi-gcc to do that but (I think) the output of gcc
> >> >> is an application that can be run in arm ported linux kernel but I
> >> >> need Intel HEX-like format that can be programmed to micro controller
> >> >> (I haven't any OS)
> >> >> I haven't any idea what to do or what keyword I must search.
> >> >
> >> > you basically need a proper linker script for small embedded device.
> >> > please, see an example at http://www.dreamislife.com/arm/ -> lpc2106_gcc.zip
> >> > and search arm groups for similar one tuned for LPC2478...
> >> >
> >> >
> >>
> >> Thanks for your replay
> >> I find a linker script for my device (that tested with my board) and
> >> used gnuarm pre-compiled binary and eclipse to compile my tested
> >> simple LED flasher program. but no success :-(
> >> you can see the output of eclipse. have any idea?
> >>
> >> make all
> >> Building file: ../main.c
> >> Invoking: GCC C Compiler
> >> /home/noBackup/arm/gnuarm-4.0.2/bin/arm-elf-gcc -O3 -g -Wall -c
> >> -fmessage-length=0 -mcpu=arm7tdmi-s -MMD -MP -MF"main.d" -MT"main.d"
> >> -o"main.o" "../main.c"
> >> Finished building: ../main.c
> >>
> >> Building target: lpc2478
> >> Invoking: GCC C Linker
> >> /home/noBackup/arm/gnuarm-4.0.2/bin/arm-elf-gcc -mcpu=arm7tdmi-s
> >> -nostartfiles -T /home/hadi/workspace/lpc2478/LPC2478.ld -o"lpc2478"
> >> ./main.o
> >> Finished building target: lpc2478
> >>
> >> make --no-print-directory post-build
> >> /home/noBackup/arm/gnuarm-4.0.2/bin/arm-elf-objcopy --output-target
> >> ihex lpc2478 lpc2478.hex
> >>
> >
> > please show the 'simple LED flasher' source and 'arm-elf-objdump -hw lpc2478'.
> >
> 
> I attach all of them.
> Thanks for your time.
> 


the delay_ms() function was optimized at compile time to plain 'return'
you can see this with -fdump-tree-optimized gcc option.
and finally the hexdump shows .debug* sections in binary - there's no need
to waste eeprom resources with debuginfo.