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Discussion Groups | Piclist | help!!!!! with pic 12f675
A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.
Re: help!!!!! with pic 12f675 - Paul James E. - Aug 1 3:29:00 2003
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electromechy1, Make sure you change the ADCON register to make the AD inputs Digital I/O's instead of the analog inputs. Regards, Jim > hi guys, > just wtitten 1st prog as per data sheet,builds ok, problem is when i > run it in simulator (mplab), trisio loading ok but gpio won't load > value from w reg....i know i am doing something wrong...but can't find > sample progs for 12f675...anyway heres my prog > > cmcon equ 19h > gpio equ 05h >status equ 03h > trisio equ 85h > > bcf status,5 ;goto bank 0 > clrf gpio ;clear gen purp in/out port > movlw 07h ;load w reg > movwf cmcon ;set pin 0,1,2 to digital i/o > bsf status,5 ;goto bank 1 > movlw 8h ;make pins 0,1,2,4,5 outputs > movwf trisio ;pin 3 can only be input > bcf status,5 ;back to bank 0 > movlw 3fh ;load w reg > movwf gpio ;switch on pins > end ;end program > > regards > >shaun > > > ------------------------ Yahoo! Groups Sponsor > ---------------------~--> Free shipping on all inkjet cartridge & > refill kit orders to US & Canada. Low prices up to 80% off. We have > your brand: HP, Epson, Lexmark & more. > http://www.c1tracking.com/l.asp?cid=5510 > http://us.click.yahoo.com/GHXcIA/n.WGAA/ySSFAA/dN_tlB/TM > ---------------------------------------------------------------------~-> > > to unsubscribe, go to http://www.yahoogroups.com and follow the > instructions > > |
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help!!!!! with pic 12f675 - shaunundergrad - Aug 1 11:44:00 2003
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hi guys, just wtitten 1st prog as per data sheet,builds ok, problem is when i run it in simulator (mplab), trisio loading ok but gpio won't load value from w reg....i know i am doing something wrong...but can't find sample progs for 12f675...anyway heres my prog cmcon equ 19h gpio equ 05h status equ 03h trisio equ 85h bcf status,5 ;goto bank 0 clrf gpio ;clear gen purp in/out port movlw 07h ;load w reg movwf cmcon ;set pin 0,1,2 to digital i/o bsf status,5 ;goto bank 1 movlw 8h ;make pins 0,1,2,4,5 outputs movwf trisio ;pin 3 can only be input bcf status,5 ;back to bank 0 movlw 3fh ;load w reg movwf gpio ;switch on pins end ;end program regards shaun |
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Re: help!!!!! with pic 12f675 - Author Unknown - Aug 1 13:35:00 2003
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hi jim, thanx for reply, adcon register defaults to zero, i.e, off regards shaun | |||
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Re: help!!!!! with pic 12f675 - jrem123 - Aug 1 15:23:00 2003
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Why are you clearing gpio prior to setting up the port? Note 08h is not 8h, is it? This works for me on a 12F629 & 675 bcf status,5 movlw 0x07 movwf cmcon bsf status,5 movlw 0x08 movwf trisio bcf status,5 clrf gpio Also, I think the 675 needs to have the ansel setup for analog, cleared for digital I/O. Regards, John. --- In , "shaunundergrad" <electromechy1@a...> wrote: > hi guys, > just wtitten 1st prog as per data sheet,builds ok, problem is when i > run it in simulator (mplab), trisio loading ok but gpio won't load > value from w reg....i know i am doing something wrong...but can't > find sample progs for 12f675...anyway heres my prog > > cmcon equ 19h > gpio equ 05h > status equ 03h > trisio equ 85h > > bcf status,5 ;goto bank 0 > clrf gpio ;clear gen purp in/out port > movlw 07h ;load w reg > movwf cmcon ;set pin 0,1,2 to digital i/o > bsf status,5 ;goto bank 1 > movlw 8h ;make pins 0,1,2,4,5 outputs > movwf trisio ;pin 3 can only be input > bcf status,5 ;back to bank 0 > movlw 3fh ;load w reg > movwf gpio ;switch on pins > end ;end program > > regards > > shaun |
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Re: Re: help!!!!! with pic 12f675 - Author Unknown - Aug 1 15:32:00 2003
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cheers john, yes your right about the ansel having to be cleared, have it working now (on simulation anyway), i was clearing gpio because this was given as example in data sheet, don't forget i'm a newbie. one thing i haven't sussed yet...does the internal oscillator configured to come when powered up....and how do you know when you've blown a chip?? regards shaun | |||
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Re: help!!!!! with pic 12f675 - jrem123 - Aug 3 9:56:00 2003
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I'm not sure I understand you question, if you configure the internal oscillator to run then it runs when the chip powers up. b) I know I've cooked a chip usually after I've done something stupid like put 15vdc on it instead of 5. Else you can fry a port or an I/O, but they seem pretty hearty. Regards, John. --- In , electromechy1@a... wrote: > cheers john, > yes your right about the ansel having to be cleared, have it working now (on > simulation anyway), i was clearing gpio because this was given as example in > data sheet, don't forget i'm a newbie. one thing i haven't sussed yet...does > the internal oscillator configured to come when powered up....and how do you > know when you've blown a chip?? > > regards > > shaun |
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Re: help!!!!! with pic 12f675 - burt0072003 - Oct 2 8:00:00 2003
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You have to include config word __CONFIG _CP_OFF & _INTRC_OSC_NOCLKOUT & _PWRTE_ON & _WDT_OFF & _MCLRE_OFF Just cut and paste other wise it won't work. Burt --- In , "Paul James E." <jamesp@i...> wrote: > > electromechy1, > > Make sure you change the ADCON register to make the AD inputs Digital > I/O's instead of the analog inputs. > > Regards, > > Jim > > > hi guys, > > just wtitten 1st prog as per data sheet,builds ok, problem is when i > > run it in simulator (mplab), trisio loading ok but gpio won't load > > value from w reg....i know i am doing something wrong...but can't find > > sample progs for 12f675...anyway heres my prog > > > > cmcon equ 19h > > gpio equ 05h > >status equ 03h > > trisio equ 85h > > > > bcf status,5 ;goto bank 0 > > clrf gpio ;clear gen purp in/out port > > movlw 07h ;load w reg > > movwf cmcon ;set pin 0,1,2 to digital i/o > > bsf status,5 ;goto bank 1 > > movlw 8h ;make pins 0,1,2,4,5 outputs > > movwf trisio ;pin 3 can only be input > > bcf status,5 ;back to bank 0 > > movlw 3fh ;load w reg > > movwf gpio ;switch on pins > > end ;end program > > > > regards > > > >shaun > > > > > > > > > > ------------------------ Yahoo! Groups Sponsor > > ---------------------~--> Free shipping on all inkjet cartridge & > > refill kit orders to US & Canada. Low prices up to 80% off. We have > > your brand: HP, Epson, Lexmark & more. > > http://www.c1tracking.com/l.asp?cid=5510 > > http://us.click.yahoo.com/GHXcIA/n.WGAA/ySSFAA/dN_tlB/TM > > ------------------------------------------------------------------ ---~-> > > > > to unsubscribe, go to http://www.yahoogroups.com and follow the > > instructions > > > |
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