Title: Message
Nhmmm .. the last serial interface I programmed
(a Weidemueller device) required the data also as a hexadecimal string. A simple
“inttohex(mychecksum and $ff,2);” should do the job (is in the SysUtils
unit). Just send your data as a string like ‘0df20a0a02450231384301000a’ !
By the way, to convert your data from a hexstring
to integer (for calculating your checksum) you can use the “strtoint('$’+’1e');”
function. Make sure the number you pass into the strtoint routine has a $ char
in front so that the string will be interpreted as hex.
Cheers,
Stefan
-----Original
Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Kyley Harris
Sent: Sunday,
25 July 2004 5:07
p.m.
To: [EMAIL PROTECTED]; 'NZ Borland
Developers Group - Delphi List'
Subject: RE: [DUG] Pulling my hair
out
Unless I’m missing something HEX data is string data ie
Chr($0d)+Chr($06) etc etc
-----Original
Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Jeremy Coulter
Sent: Sunday,
25 July 2004 7:38
p.m.
To: 'NZ Borland Developers Group -
Delphi List'
Subject: RE: [DUG] Pulling my hair
out
yeah its
all sorted now. Thanks.
The only
thing I am having trouble with at the moment is, I need to output the HEX to a
comport, and I am using ther ASyncPro comp. from Turbopower, but, it only seems
to output strings.
Anyone know
how I can output the hex data via the Asyncpro comps?
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Stefan Mueller
Sent: Sunday,
25 July 2004 19:21
To: 'NZ Borland Developers Group -
Delphi List'
Subject: RE: [DUG] Pulling my hair
out
06 =
06
+07 = 0d
+01 = 0e
+73 = 81
+01 = 82
+00 = 82
and the other thing with keep the
base byte means that at the end just make a (mysum and $ff to keep the first 8
bit).
-----Original
Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Jeremy Coulter
Sent: Sunday,
25 July 2004 9:28
a.m.
To: [EMAIL PROTECTED]
Subject: [DUG] Pulling my hair out
I am pulling my hair out here at the
moment.
I have this line of data :-
0df20a0a02450231384301000a
Its a hex data. Now the last 0A is
the checksum.
The document I have says that the
checksum is made up of the SUM of BYTES for these values :-
0a 0a 02 45 02 31 38 43 01 00
and this line of data has a HEX
checksum of 82 (thats 82 in HEX)
But I am stuffed if I can work it
out. I thought I had it figured out, but NO !
Can someone enlighten me how to come
to these values? I am SURE I am meant to know this, but its sure as hell not
coming to me.
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