R: [simpits-tech] How 1 hour becomes 3+ (Progress update)

Davide simpits-tech@simpits.org
Sat, 2 Mar 2002 00:49:39 +0100 

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How 1 hour becomes 3+ (Progress update)Nice Work Wiebe !=20
I think i'll need your help to lights up my instruments.
Hope not to borry with a "river" of questions.

too late to begin ! ....

http://www.geocities.com/fox_two_64/Eng.html

  ----- Original Message -----=20
  From: Wiebe, Alex=20
  To: 'simpits-tech@simpits.org'=20
  Sent: Tuesday, February 26, 2002 5:08 PM
  Subject: [simpits-tech] How 1 hour becomes 3+ (Progress update)


  What a night! A while back a managed to assemble my HSI gauge, but =
hadn't found time to get the software working. Over the weekend I =
grabbed WideFS (thanks Gene for the pointer) and last night I started =
tackling more then one problem at once (never a good sign). I've been =
staying up far too late over the last few nights, and had decided to =
give my pit a good 1 hour, and then go to bed. I even set my watch alarm =
to 9:50PM to remind myself to be responsible and get some sleep...

  I rewrote my servo driver to be an executable so I can use WideFS =
instead of the bulkier FS98 installation. I then tried to get it to work =
with the newly build HSI - nothing.

  So I wrote a test program, and spent a long time wondering why the =
pitch / bank information wasn't changing. (beep-beep-beep - its 9:50, =
I'm so close I can taste it! Just a couple more minutes.)

  Turns out the math routines were performing rounding too soon. After =
changing the=20

  '* 360 / (65356 * 65356)'=20

  to the following;=20

  '* 360.0 / (65356.0 * 65356.0)'=20

  the data started working! Wheee! (At this point it is 10:30PM)=20

  Well, now I have the program working, and the HSI is sitting there =
looking at me. Ok, port the code to the driver and see if it works. Then =
I'll go to bed. Well, it turns, but the pitch is inverted! Easy fix, =
recompile and go. Pitch is fixed. Bank is off. I knew it would be - the =
servo was mounted with a best guess as to centre (for that matter so was =
the pitch - guess I got lucky there).

  Add a fudge factor, recompile, test, repeat.=20

  It's close, but, the bank range is limited to +/- 45 degrees! (It's =
now 11:30PM, time for bed, I'll fix it another day)=20

  I thought I had the controller driving the servo +/- 90 degrees! Nope, =
forgot that jumper. Adding the jumper only takes 2 minutes! Dang, now I =
need to recalibrate it... lather,rinse,repeat

  12:00AM Hooray! It's working! I wonder what it looks like mounted in =
the dash (I just painted it "Knight's Armour" on the weekend)?

  12:30AM After a couple touch-n-goes, the instrument looks pretty =
sweet. I stumble into bed mumbling something about hoping the coffee's =
extra strong at work tomorrow...

  http://www.geocities.com/ehud42/pics/HSI_Construction/gallery.htm=20


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<HTML><HEAD><TITLE>How 1 hour becomes 3+ (Progress update)</TITLE>
<META content=3D"text/html; charset=3Diso-8859-1" =
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<META content=3D"MSHTML 5.00.2614.3500" name=3DGENERATOR>
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Nice Work Wiebe ! </FONT></DIV>
<DIV><FONT face=3DArial>I think i'll need your help to lights up my=20
instruments.</FONT></DIV>
<DIV><FONT face=3DArial>Hope not to borry with a "river" of=20
questions.</FONT></DIV>
<DIV><BR><FONT face=3DArial size=3D2>too late to begin ! =
....</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial><A=20
href=3D"http://www.geocities.com/fox_two_64/Eng.html">http://www.geocitie=
s.com/fox_two_64/Eng.html</A></FONT></DIV>
<DIV>&nbsp;</DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A href=3D"mailto:AWiebe@online-can.com" =
title=3DAWiebe@online-can.com>Wiebe,=20
  Alex</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
  href=3D"mailto:'simpits-tech@simpits.org'"=20
  title=3Dsimpits-tech@simpits.org>'simpits-tech@simpits.org'</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, February 26, =
2002 5:08=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [simpits-tech] How 1 =
hour=20
  becomes 3+ (Progress update)</DIV>
  <DIV><BR></DIV>
  <P><FONT size=3D2>What a night! A while back a managed to assemble my =
HSI gauge,=20
  but hadn't found time to get the software working. Over the weekend I =
grabbed=20
  WideFS (thanks Gene for the pointer) and last night I started tackling =
more=20
  then one problem at once (never a good sign). I've been staying up far =
too=20
  late over the last few nights, and had decided to give my pit a good 1 =
hour,=20
  and then go to bed. I even set my watch alarm to 9:50PM to remind =
myself to be=20
  responsible and get some sleep...</FONT></P>
  <P><FONT size=3D2>I rewrote my servo driver to be an executable so I =
can use=20
  WideFS instead of the bulkier FS98 installation. I then tried to get =
it to=20
  work with the newly build HSI - nothing.</FONT></P>
  <P><FONT size=3D2>So I wrote a test program, and spent a long time =
wondering why=20
  the pitch / bank information wasn't changing. (beep-beep-beep - its =
9:50, I'm=20
  so close I can taste it! Just a couple more minutes.)</FONT></P>
  <P><FONT size=3D2>Turns out the math routines were performing rounding =
too soon.=20
  After changing the </FONT></P>
  <P><FONT size=3D2>'* 360 / (65356 * 65356)'</FONT> </P>
  <P><FONT size=3D2>to the following;</FONT> </P>
  <P><FONT size=3D2>'* 360.0 / (65356.0 * 65356.0)'</FONT> </P>
  <P><FONT size=3D2>the data started working! Wheee! (At this point it =
is=20
  10:30PM)</FONT> </P>
  <P><FONT size=3D2>Well, now I have the program working, and the HSI is =
sitting=20
  there looking at me. Ok, port the code to the driver and see if it =
works. Then=20
  I'll go to bed. Well, it turns, but the pitch is inverted! Easy fix, =
recompile=20
  and go. Pitch is fixed. Bank is off. I knew it would be - the servo =
was=20
  mounted with a best guess as to centre (for that matter so was the =
pitch -=20
  guess I got lucky there).</FONT></P>
  <P><FONT size=3D2>Add a fudge factor, recompile, test, repeat.</FONT> =
</P>
  <P><FONT size=3D2>It's close, but, the bank range is limited to +/- 45 =
degrees!=20
  (It's now 11:30PM, time for bed, I'll fix it another day)</FONT> </P>
  <P><FONT size=3D2>I thought I had the controller driving the servo +/- =
90=20
  degrees! Nope, forgot that jumper. Adding the jumper only takes 2 =
minutes!=20
  Dang, now I need to recalibrate it... lather,rinse,repeat</FONT></P>
  <P><FONT size=3D2>12:00AM Hooray! It's working! I wonder what it looks =
like=20
  mounted in the dash (I just painted it "Knight's Armour" on the=20
  weekend)?</FONT></P>
  <P><FONT size=3D2>12:30AM After a couple touch-n-goes, the instrument =
looks=20
  pretty sweet. I stumble into bed mumbling something about hoping the =
coffee's=20
  extra strong at work tomorrow...</FONT></P>
  <P><FONT size=3D2><A=20
  =
href=3D"http://www.geocities.com/ehud42/pics/HSI_Construction/gallery.htm=
"=20
  =
target=3D_blank>http://www.geocities.com/ehud42/pics/HSI_Construction/gal=
lery.htm</A></FONT>=20
  </P></BLOCKQUOTE></BODY></HTML>

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