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000216_jgriess@caramail.com_Tue Jun 19 10:48:42 EDT 2001.msg
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Article: 12536 of comp.protocols.kermit.misc
From: "jean-luc" <jgriess@caramail.com>
Newsgroups: comp.protocols.kermit.misc
References: <9ghrnm$m59$1@front1m.grolier.fr> <9gislq$j3l$1@newsmaster.cc.columbia.edu> <3b2dbe15$1_2@news.datacomm.ch> <9gl0kj$l64$1@newsmaster.cc.columbia.edu>
Subject: Re: must write a soft including Kermit binary file send
Date: Tue, 19 Jun 2001 14:00:05 +0200
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Xref: newsmaster.cc.columbia.edu comp.protocols.kermit.misc:12536
please understand
- The OS-9 stuf is given and working, also if it is a older Kermit version.
- OS-9 is the target where "kermit ri" is waiting for files.
I was reading some of your source files, like ckcfn2.c and gkermit.c, so its
a great
help, know about S, F, D-type packets.
The receiver OS-9 is waiting for files and send a NACK at regular
intervalls
NACK is 01 23 20 4E 33 0D
where 01 is the start character
where 23 20 is the sequence number
where 4E ist the N for NACK
where 0D is the block end
what is the 33 for ?
is this a checksumm ?
I have problems with the checksumm calculation.
I use the 1 Byte checksumm, type 1
so its all bytes anded with 177 and summed, add higher bits and anded with
77
I dont find that result.
Can you help ?
Frank da Cruz <fdc@watsun.cc.columbia.edu> wrote in message
news:9gl0kj$l64$1@newsmaster.cc.columbia.edu...
> In article <3b2dbe15$1_2@news.datacomm.ch>,
> jean-luc <jgriess@caramail.com> wrote:
> : The receiver Kermit is on a OS-9 system.
> :
> : To automate a test-production system,
> : I must be able to download files to the OS-9 System
> : using a Labview Application.
> :
> : In fact, I need only 5% of Kermits capabilities
> : file transfer 8bit quoting auto-download
> :
> You can either use the Kermit software that is already
> written for OS-9:
>
> http://www.columbia.edu/kermit/ckermit.html
>
> or you can write a Kermit implementation yourself based
> on the protocol specification. The hex bytes that you
> quoted are not going to help you understand the protocol;
> they vary according to settings and conditions and
> negotiations. You either have to read about it or just
> use what is already available.
>
> - Frank