Problem with ADC

[paul borgmeier]

His schematic shows a F88 but he fixed his code by adding TRISA.0 = 1 (pot on RA1 not RA0) - does not make sense??

Try this for the second block of ASM code

;;;;;;;;;;;;;;;;;;;;;;;;;;;;    AUTHORIZATION OF COUNTING
TMR0 = 0
TRISABUF.3 = 1
PORTA = TRISABUF
;;;;;;;;;;;;;;;;;;;;;;;;;;;;    BASE TIME  
COUNT1=TEMPS
PAUSEUS (COUNT*4+2)
PAUSE 5
;;;;;;;;;;;;;;;;;;;;;;;;;;;      STOP OF COUNTING
TRISABUF.3=0
PORTA=TRISABUF
;;;;;;;;;;;;;;;;;;;;;;;;;;;      RECUPERATION OF THE METERS
FHI=TMR0
COUNT1=0
Toggle:
COUNT1=COUNT1+1
PORTA.3=1
PORTA.3=0
IF (FHI-TMR0) = 0 THEN Toggle
COUNT1=(COUNT1^$FF)
FLO=COUNT1+1	
;;;;;;;;;;;;;;;;;;;;;;;;;;;     BASE TIME

Any second opinions on the conversion?

Savnik, what does your program do?

[savnik]

His schematic shows a F88 but he fixed his code by adding TRISA.0 = 1 (pot on RA1 not RA0) - does not make sense??

Try this for the second block of ASM code

;;;;;;;;;;;;;;;;;;;;;;;;;;;;    AUTHORIZATION OF COUNTING
TMR0 = 0
TRISABUF.3 = 1
PORTA = TRISABUF
;;;;;;;;;;;;;;;;;;;;;;;;;;;;    BASE TIME  
COUNT1=TEMPS
PAUSEUS (COUNT*4+2)
PAUSE 5
;;;;;;;;;;;;;;;;;;;;;;;;;;;      STOP OF COUNTING
TRISABUF.3=0
PORTA=TRISABUF
;;;;;;;;;;;;;;;;;;;;;;;;;;;      RECUPERATION OF THE METERS
FHI=TMR0
COUNT1=0
Toggle:
COUNT1=COUNT1+1
PORTA.3=1
PORTA.3=0
IF (FHI-TMR0) = 0 THEN Toggle
COUNT1=(COUNT1^$FF)
FLO=COUNT1+1	
;;;;;;;;;;;;;;;;;;;;;;;;;;;     BASE TIME

Any second opinions on the conversion?

Savnik, what does your program do?

Sorry ,the pot is on RA0 (the schematic is wrong)

With the first block of asm the frequency meter work.

When i change the second asm with yours code i take error when compile.
When I change the PAUSEUS (COUNT*4+2) with PAUSEUS (COUNT1*4+2) and the Toggle with Toggle1 the code compile , but the frequency on LCD is above 14Mhz the regular (90.6Mhz -> 104.6Mhz)

[paul borgmeier]

Now that it is not 2Am, I see that it might be the PAUSEUS line - PAUSEUS has a minimum delay of 24uS when used with a 4 MHz XTAL. I also took "your" comments about the delay loop as being accurate at 1 mS. I will check that as well.

What XTAL speed are you running?

Unfortuantely, it is "Off to Grandma's House" here as it is a major holiday. I will not have a minute to debug until tomorrow night (36 hours from now). As asked before,

Anyone else have an opinion on the ASM to BASIC conversion or want to take a stab at the problem? If not, I will revisit when I return.

[savnik]

What XTAL speed are you running?

I use 4MHZ xtal.

[paul borgmeier]

Also, why the ASM? Everything you show is easy in PBP?

I guess I lied - I do not see an easy solution to the minimum PAUSEUS problem noted above - I am glad it works for you with the ASM blocks.
Good Luck,