Maximum value of ADCIN

[fratello]

I try to find myself the answer on this question, but I am not sure if I understand correct. Please, help me ! I read, for 7 seconds, the value of ADCIN, using 12F675 ; I need to memorize
the maximum (the highest) value of reading. It's like this OK ?

 for cnt=1 to 70       			
	adcin 3, v_cal
  	v_cal=v_cal * 5000            ' I use VDD as Vref
  	v_cal=div32 1023
 ' 	vmax=0 max v_cal             ' it's this
      or
 '    vmax=vmax max v_cal         ' or this correct ?
  	pause 100
 next cnt

[aratti]

Why not using a simpler way?

for cnt=1 to 70       			
	adcin 3, v_cal
  	v_cal=v_cal * 5000            ' I use VDD as Vref
  	v_cal=div32 1023

If cnt = 1 then
vmax = v_cal  
else
If v_cal > vmax then vmax = v_cal
endif

pause 100
 next cnt

Cheers

Al.

[rsocor01]

Fratello,

The result should be in mVolts.

[Darrel Taylor]

You almost had it right Fratello.
And the timing will be more accurate if you don't do the math on each loop.

vmax = 0
for cnt=1 to 70       			
    adcin 3, v_cal
    vmax=vmax max v_cal
    pause 100
next cnt
v_cal=vmax * 5000            ' I use VDD as Vref
v_cal=div32 1023

[fratello]

Thank You all for reply !
Both variant (mine = 0 max v_cal and variant of Mr.Robert ) give me the same results : 24 .
According of my math, I think this is the value of 24 mVolts. I am right ?
Now I try the variant of Mr.Darrel (remember ? My guardian angel in PBP problems ...).
I post the results.
LE : Something strange...with this variant, I read only 5 mV ?!
Maybe the schematic help...

[rsocor01]

Oops, disregard my comment. Yes, you should get your result in millivolts.

Robert