Problem with Div32

HI,

I have a problem using div32, I think it might be related to memory issue because the first time I use Div32, the division works, but the second time, the result is 65535, humm I think I have seen this number before :)
here is the code, thanks in advance

if counter > 126 then
dummy=(counter *10000)
test11= div32 506

dummy =0

dummy=(126 * 10000)
test22=div32 506 'this is always 65535....

test3=test11-test22

gauss= test3 / 25
gauss1= test3 // 25

lcdout $FE,1, "1:",dec test11," 2:", dec test22," 3:", dec test3
lcdout $FE,$C0, "C:", dec counter, "G:", dec dummy

The second time, you are multiplying two constants.
Which is actually multiplied when the program gets compiled. It's called "Constant Folding".

Make at least one of the values a WORD variable, and it should work better.
<br>

hi,

all my variables are word variables: here is the full program, except for the overhead:

'///////////////////////////////////////////////
'// Variable Declaration and initialization //
'///////////////////////////////////////////////

oldcounter var word
counter var word
gauss var word
gauss1 var word
dummy var word
test11 var word
test22 var word
test3 var word
difference var word

counter = 0
oldcounter =0
gauss1 =0

'//////////////////////////
'// Program starts here //
'//////////////////////////

loop:

ADCON0.2 = 1 'Start A/D Conversion
oldcounter = counter

ADCIN 0, counter 'Read channel PORTA.0
pause 30

'Reducing the varying output (average)
counter = (counter + oldcounter) / 2

'************** Condition 1 ***********************
if counter == 126 then
lcdout $FE,1, " Neutral ",dec counter
lcdout $FE,$C0, "Gauss: ", dec gauss1
endif

'************** Condition 2 ***********************
if counter > 126 then 'GOOD CALCULATION
dummy=(counter *10000)
test11= div32 506

dummy =0

dummy=(126 * 10000)
test22=div32 506

test3=test11-test22

gauss= test3 / 25
gauss1= test3 // 25

lcdout $FE,1, "1:",dec test11," 2:", dec test22," 3:", dec test3
lcdout $FE,$C0, "C:", dec counter, "G:", dec dummy

'lcdout $FE,1, " Negative S: ",dec counter
'lcdout $FE,$C0, "Gauss: -", dec gauss,".", dec gauss1
endif

I've highlighted the offending line in your last post.

In order for DIV32 to work. Certain PBP system variables must be preloaded with the result of a WORD multiplication.

If the multiplication happens at "Compile-Time", those variables don't have the correct value.

When the WORD multiplication happens at "Run-Time", PBP's system variables still have the 32-bit result when it gets to the DIV32.
<br>

Thats the line I though was problematic.
This is why I added
dummy =0
I even tried dummy = 0000000000000000
to remove any values in dummy, but it is not enough.
I dont quite get your solution.

k

a ok,
I added
constant var word
constant = 126

thanks