Thanks for another quick reply - I am getting really close - one fairly minor
issue to go:
I've fixed the source file f.s to look like what gcc expects:
.arch msp430x1232
.text
.org 0xE000
main: nop
nop
nop
.end
This assembles without error using the command line:
msp430-gcc -c f.s -o f.out
and I can then convert to intel hex using:
msp430-objcopy -O ihex f.out f.hex
And here is my only remaining problem: The object file f.out is about 56K long
- it is filled with zero bytes from address 0000 to DFFF, then my 6 bytes of
expected object code (the three nops) beginning at E000. When this is converted
to intel hex, I end up with a giant file full of 16-byte records that try to
fill memory from 0000 to DFFF, then the expected 6-byte hex record showing the
bytes beginning at E000 which are my tiny program above.
So my remaining question - how to I tell msp430-gcc to confine it's output to
the memory range I want (in this case, E000 up to the length of the program I'm
trying to assemble)?
Thanks again for all the help!
Dave
> Message: 7
> Date: Mon, 10 Aug 2009 16:13:36 -0600
> From: david feldman
> Subject: [Mspgcc-users] Beginner question - getting started with
> msp430-gcc - command line usage
> To:
> Message-ID:
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> I'm in need of some help getting started using msp430-gcc on a linux machine
> using command line. I have no prior experience with gcc so there's a learning
> curve I'd like help shortening.
>
> After kind help from this list, I've installed msp430-gcc and related binary
> utilities onto my Ubuntu 9.04 machine from repository at wyper.ca. The
> instructions I used (from a handy PDF file at www.develissimo.net) are much
> more extensive (including install of debugger proxy, eclipse IDE, and so on)
> than I needed in this case (just "binutils".)
>
> My need is only to assemble msp430 assembly source file and link into an
> intel hex file that I can then transmit to my remotely-located msp430
> microcontroller. I do not need jtag support (my microcontroller has a serial
> port loader and I won't be using jtag due to it's remote location). I can
> only access the remote linux machine (connected to the msp430
> microcontroller) via ssh, so I can't use the Eclipse IDE. Therefore, this is
> a really basic configuration - just enough to edit-assemble-link-download,
> all from command line.
>
> I am sure my problem (at this stage) is just lack of appropriate command line
> options for msp430-gcc, but when I try to compile a trivial assembly language
> program:
>
> $ cat f.s
> include
> org #0xE000
> nop
> end
>
> with the command (based on the msp430-gcc documentation on assembling I
> found):
>
> $ msp430-gcc -D_GNU_ASSEMBLER_ -x assembler-with-cpp -c f.s -o f.o
>
> I get this output:
>
> f.s: Assembler messages:
> f.s:1: Error: unknown opcode `include'
> f.s:2: Error: unknown opcode `org'
> f.s:4: Error: unknown opcode `end'
>
> What other options do I need to tell msp430-gcc how to recognize the incoming
> source code?
>
> Very tks,
>
> Dave
>
>
>
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