Still 12F675 question

Hello
I am still "playing" with a 12F675
this is quite new for me
I use
ansel = 0 ' all digital
cmcon = 7 ' comparator OFF
TRISIO = %001001 ' GP0 et GP3 en INPUT
OPTION_REG.7 = %110110 'pull up actifs

My problem is : I have no signal on output port !
question : may I have to use pull up resistors on output port
or this option_reg.7 will switch internally thoses pull up ?
(weak pull up story) on page 21 of the datasheet

thanks in advance
francois

I would not mess with the weak pullups , just pretend they are not there for now.
Can you post all of your code and configs? Makes it a bit easier to see what you have.

Dave
Sorry for the delay, I was in vacation
to be clear, I do not understand your answer , I'm french , so, english expressions
are not so easy to understand ..
I must work on my application and come back with more details
to see if I need to connect pull up resistors (as in the past)
or to "play" with option reg command !
I will come back soon
Francois

Hello Francois,
To have "all digital" you have the ADCON0 register to deal with, specifically the ADON bit which is ADCON0.0 which must be cleared either by ADCON0 = 0 or ADCON0.0 = 0

Code:

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OPTION_REG.7 = %110110 'pull up actifs

---

option_reg.7 is just a bit.

you should do this to activate pull-ups.

Code:

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OPTION_REG.7 = 0 ; activate pull-ups

---

and you dont need to use pull-ups for output.

Hello
I was STUPID with my option-reg.7 bit !
May be I was swimming in all those bits in all those registers !
I have made some changes, BUT the DUCK is still alive
I have NO signal (digital) on ENAB, DTA and Clk
LED is flashing (at least !)

any ideas ?
thanks

hardware in PDF
CODE in txt

Quote:

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Originally Posted by F1CHF

Hello
I was STUPID with my option-reg.7 bit !
May be I was swimming in all those bits in all those registers !
I have made some changes, BUT the DUCK is still alive
I have NO signal (digital) on ENAB, DTA and Clk
LED is flashing (at least !)

any ideas ?
thanks

hardware in PDF
CODE in txt

---

Hi Francois,
You built yourself a nice loop there, complete with flashing leds:D
it goes 2 places, th BOUCLE or INIT, you did not tell it to go anywhere else, if you want it to procede to envoi take out goto init.

Thank for your help but you surprise me ..
power on
INIT ...
goto envoi
send data(s) to PLL
goto boucle
if LOCK = 1 goto boucle (LOCK is OK PLL is running)
if not goto INIT

as far as I understand

I will put some pullup to check now ..
it is very strange

Francois