jan-erik,

 The code could be written the way you show, but it doesn't have to be.=20

 I agree that normally you should use symbols for addresses, but in this
 case, I chose addresses because I was troubleshooting a problem.
 And to those who suggested I should change the the ASNELB from clearing

 bit 7 to clearing the whole register are indeed correct.  When I was=20
 doing the setup, I cut and pasted the same routine and changed the page
and label.
 But on that one, I didn't change enough.  I knew the problem was
something simple.
 I just didn't see it.  That's why more than one set of eyes are a good
thing in=20
 situations like this.  Anyway, it works as intended now.

 Thanks all,

 Regards,

 Jim




> -------- Original Message --------
> Subject: Re: [FWD: [PIC]: PIC16F1827 PORTB Problem.] *** RESEND ***
> From: Jan-Erik Soderholm <jan-erik.soderholm@telia.com>
> Date: Tue, June 21, 2011 12:51 am
> To: "Microcontroller discussion list - Public." <piclist@MIT.EDU>
>=20
>=20
> If i'm not wrong, that code should/could be written like
> this on the enhanced PIC16 models :
>=20
>    clrf	PORTB       ; Clear the PORT
>=20
>    movlb TRISB
>    clrf	TRISB
>    movlb RCSTA
>    bsf	RCSTA,7
>    movlb ANSELB
>    bcf	ANSELB,7  ; Should probably be a clrf...
>    movlb SSP1CON1
>    clrf	SSP1CON1
>    clrf	SSP2CON1
>    movlb ADCON0
>    clrf	ADCON0
>    movlb CPSCON0
>    clrf	CPSCON0
>    movlb MDCON
>    clrf	MDCON
>    movlb DACCON0
>    clrf	DACCON0
>    movlb CM1CON0
>    clrf	CM1CON0
>=20
> And *never* write out the actual address to registers
> (such as 0x08), always use symbols (BSR in this case).
>=20
>=20
> Oli Glaser wrote 2011-06-21 02:13:
> > On 20/06/2011 23:18, jim@jpes.com wrote:
> >>    Let me try this again without all the typos and spelling mistakes.
> >>    That's what I get for going too fast.
> >>
> >>    All,
> >>
> >>     I am trying to get familiar with the PIC16F1827 part that has the
> >> Capacitive Sensing Module on it.
> >>     As a start, I am setting each bit on PORTB sequentially.  This is =
just
> >> a familiarization exercise.
> >>     However, I can't get bits 1,2 and 5 to toggle.  I have tried turni=
ng
> >> off any module associated with
> >>     PORTB, but I still cannot get it to work. Bits 0, 3, 4, 6, and 7 w=
ork
> >> fine.
> >>     I am probably missing turning off something, but I just don't see =
what
> >> it is.
> >>
> >>     Below is listed what I have tried turning off so far.
> >>
> >>             clrf	PORTB       ; Clear the PORT
> >>
> >>    	movlw	0x01        ; Make pins OUTPUTS
> >>    	movwf	0x08
> >>    	clrf	TRISB
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>
> >>    	movlw	0x03        ; Disable Serial Port (UART)
> >>    	movwf	0x08
> >>    	bsf	RCSTA,7
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>
> >>    	movlw	0x03        ; Make Pins Digital, Not Analog
> >>    	movwf	0x08
> >>    	bcf	ANSELB,7
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>    =09
> >>    	movlw	0x04        ; Turn Off Synchronous Serial Ports (SPI&   I2C)
> >>    	movwf	0x08
> >>    	clrf	SSP1CON1
> >>    	clrf	SSP2CON1
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>
> >>    	movlw	0x01        ; Turn Off A/D Converter
> >>    	movwf	0x08
> >>    	clrf	ADCON0
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>
> >>    	movlw	0x00        ; Turn Off Capacitive Sense Module
> >>    	movwf	0x08
> >>    	clrf	CPSCON0
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>
> >>    	movlw	0x07        ; Turn Off Digital Signal Modulator
> >>    	movwf	0x08
> >>    	clrf	MDCON
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>
> >>    	movlw	0x02        ; Turn Off D/A Converter Module
> >>    	movwf	0x08
> >>    	clrf	DACCON0
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>
> >>    	movlw	0x02        ; Turn Off Comparator Module
> >>    	movwf	0x08
> >>    	clrf	CM1CON0
> >>    	movlw	0x00
> >>    	movwf	0x08
> >>
> >>     If anyone sees anything that I am doing wrong, or sees something t=
hat
> >> I am missing turning off
> >>     (or on if it should be on) to make PORTB work, please let me know.=
  I
> >> appreciate it.
> >>
> >>     Thanks and Regards,
> >>
> >>    Jim
> >>
> >>
> >>
> >>
> >
> > Shouldn't that be clrf ANSELB if you want make all the pins digital?
> > Although it shouldn't affect the output..
> > Couple of guesses:
> > Just checked my datasheet and it says it has more than one I2C/SPI
> > peripheral - check page 126, section 12.3.4 for the pin priorities and
> > see if you can see anything there. I would turn SSPCON2 off to start
> > with, and the CCP peripheral.
> > Check you are not having a rmw issue when you toggle the pins too.
> >
> >
> --=20
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