[ECOS] Target same as host?

Fred Woolsey fwsbcon@fwsbcon.com
Mon Jan 6 00:54:00 GMT 2003


I have successfully done just this (3- booting a second PC) using a Pentium
laptop as the target.  BTW- I just picked up a used PC (Pentium III, no
less) on eBay for $85 US for just this purpose- for use as an i386 target
for eCos- something to consider.  A lot cheaper than an SBC!

Cheers,
Fred Woolsey

----- Original Message -----
From: "Bart Veer" <bartv@ecoscentric.com>
To: <Mario.Schuepany@fh-hagenberg.at>
Cc: <ecos-discuss@sources.redhat.com>
Sent: Sunday, January 05, 2003 4:33 PM
Subject: Re: [ECOS] Target same as host?


> >>>>> "Mario" == Schuepany Mario <Mario.Schuepany@fh-hagenberg.at> writes:
>
>     Mario> Hi!
>     Mario> I have just started to work with eCos and try to get a running
>     Mario> version on my windows xp (cygwin) computer.
>
>     Mario> I have no additional hardware for a target system at the
moment,
>     Mario> so I thought it should be possible to build a system with host
>     Mario> H-i686-pc-cygwin and target i386-elf and start the "hello
world"
>     Mario> at the host pc.
>
>     Mario> The examples has been compiled successfully, but when I start
hw
>     Mario> with gdb I get the following output:
>     Mario> -----------------------------------------------------
>     Mario> $ i386-elf-gdb helloWorld.o
>     Mario> GNU gdb 5.0
>     Mario> This GDB was configured as "--host=3Di686-pc-cygwin =
>     Mario> --target=3Di386-elf"...
>     Mario> (gdb) run
>     Mario> Starting program: /c/ecos/tests/mario/helloWorld/helloWorld.o
>     Mario> Don't know how to run.  Try "help target".
>     Mario> -----------------------------------------------------
>     Mario> The complete tool chain has been compiled with target i386-elf.
>
> There are a number of problems here.
>
> 1) helloWorld.o is presumably an intermediate object file, not an
>    executable. You have to link it appropriately for the target
>    hardware before you can run it. See the programming tutorial in the
>    Getting Started guide and/or the programming concepts section of
>    the User's Guide for more details.
>
> 2) even if you do produce an i386-elf executable, you cannot run this
>    on top of cygwin. Usually eCos applications run on bare hardware,
>    not on top of another operating system. There are a couple of
>    options:
>
>    a) if you have an old PC lying around you can use this as an
>       embedded target. This PC would not boot up into DOS or Windows
>       or anything like that. Instead you can make a boot floppy
>       containing a suitable RedBoot image, connect the old PC to your
>       main development machine via serial or ethernet, and load
>       eCos applications onto the bare PC. See the i386 PC Getting
>       Started guide for more details.
>
>    b) for some architectures (e.g. MIPS TX39) eCos can run on top of
>       an architectural simulator.
>
>    c) for Linux users there is the synthetic target, which does allow
>       you to run suitably-configured eCos applications as a Linux
>       process. Hardware facilities such as interrupts are emulated
>       using Linux signals and system calls. This functionality is
>       only available under Linux, porting it to Windows would require
>       a great deal of wrok.
>
> Bart
>
> --
> Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> and search the list archive: http://sources.redhat.com/ml/ecos-discuss
>
>
>



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