If i'm not wrong, that code should/could be written like
this on the enhanced PIC16 models :

   clrf	PORTB       ; Clear the PORT

   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

And *never* write out the actual address to registers
(such as 0x08), always use symbols (BSR in this case).


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 ju=
st
>> a familiarization exercise.
>>     However, I can't get bits 1,2 and 5 to toggle.  I have tried turning
>> off any module associated with
>>     PORTB, but I still cannot get it to work. Bits 0, 3, 4, 6, and 7 wor=
k
>> fine.
>>     I am probably missing turning off something, but I just don't see wh=
at
>> 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 tha=
t
>> 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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