PIC12F683, POT & RCTIME not supported?

[CuriousOne]

Hello.

I want to read value of potentiometer into that MCU. here's sample code.



RC var GPIO.0
test var gpio.5
RESULT VAR WORD

:mainloop
HIGH RC
PAUSE 1
pot RC,100,result
pulsout test,result
goto mainloop



the all hook-up is done according to manual. But it does not works, I've hooked oscilloscope to test pin - see no pulses here when I adjust pot.

[CuriousOne]

I've looked with scope at POT pin too, there are fixed pulses, about 84hz frequency, and they don't change when I rotate the pot.

[Acetronics2]

To be known ...

POT only works "correctly" @ 4 Mhz and using the components shown in the Holy manual.

Now, having a Chip with onboard ADC ... it's a shame and a nonsense using such an awful command ( not linear, need special value components ... )

RCTime works perfectly ... but, here again, response is not linear and the range it must be used calculated with care to get enough granularity ...

Alain

[CuriousOne]

I tested RCTIME with my components on basic stamp 2p module, and it works perfectly, with nice linearity. Tried to move parts and code into PBP - does not works.

[Acetronics2]

with nice linearity

sure !!!

LOL ... I didn't know capacitor charge or discharge was showing something linear

Have a nice evening.
Alain

[CuriousOne]

Think what happens when you connect two unlinearities :)

[Acetronics2]

Think what happens when you connect two unlinearities :)

it's you who has the problem to generate your pulses ... not me ... :D

[InputJive]

I had a problem with RCTIME. Suggest you add a pause after rctime. It gives processor time to finish rctime before moving onto the next line of code.