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downloading compressed program images


Hi,

I am looking for information on downloading compressed images
of executables to target hardware.  What I have in mind is
a program resident on the target which allows maintenance
personnel to downloaded via RS-232 a new program image.  The two
things I am looking for are:

  + compression/decompression software
  + serial protocol ([XYZ]modem])

To minimize download time (executable is ~ 1 Mbyte), I would
like to compress the image on the host, download it via
some reliable serial protocol, decompress it on the target,
and then burn it into flash.

I know this has been done before and was looking for suggestions
on freely available software to help with the
compression/decompression and serial protocol parts.

Thanks in advance.

--joel
Joel Sherrill                    Director of Research & Development
joel@OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
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