IR detector

[SteveB]

My calculation is

shotspersecond = count / seconds

a) Declare your variables as WORDS

b) Multiply count by something like 100 or 1000. This shifts the decimal place to the right. Pick a multiplier that will keep the result below 65536.

b) Now, do the divide: shotspersecond = count / seconds.

c) Display shotspersecond with something like:

LCDOUT DEC shotspersecond/100, ".",DEC2 shotspersecond//100

The key is to shift the decimal place prior to the division, then adjust the display to account for the shift.

For more reading (and a better example of integer math), take a look at These threads from Darrel Taylor:
Retrieving 32bit Multiply Result
Retrieving Div32 Remainder
32-bit Variables and DIV32, Hourmeter 99999.9.

You might also try a search for integer math.

HTH,
Steve

[geckogrotto]

Ohhh thanks Steve I was multiplying x 100 after the divide not before thanks I got it now

[geckogrotto]

Ok really this time last question. This has more to do with eagle but figured you guys would know.
I'm trying to find a LCD like the one on page 94 in the manual to use with eagle and I can't seem to find one.

I downloaded all the LBR files I could find that said LCD on them but still no luck.

[malc-c]

Mat,

Just select one of the connectors / Pin Headers that suit the number of connections on the LCD. This will allow you to either plug the LCD into your board if you use a suitable pin and header block, or solder wires directly to the pads if the LCD is remote from the board

[geckogrotto]

Thanks malc that will work fine.
For anyone who was interested or helped with the process and wanted to see the end result here is a video.

http://www.gecko-grotto.com/workshop/lcd_counter.wmv