Post by thread:[PIC]toggle output pin from CCP module in 12F/16F.

Hi. Checked datasheet for 12F683 and 16F690. In the CCP section, "Compare mode", it says : When a match occurs, the CCP1 module may: - Toggle the CCP1 output. <<<=== Note! - Set the CCP1 output. - Clear the CCP1 output. .... The action on the pin is based on the value of the CCP1M<3:0> control bits of the CCP1CON register. Now, the table for the CCP1CON register says : 1000 = Compare mode, set output on match (CCP1IF bit is set) 1001 = Compare mode, clear output on match (CCP1IF bit is set) There is no "toggle output on match" option there Is this a (known) datasheet error? There is nothing in the errata documents. Jan-Erik

As far as i know the CCP is the same on most pics.... You need to change the polirity of bit zero to sent the next edge Teh below is from a 16f1827 but i am pretty sure it works with a 690. banksel CCP4CON ; bank 6 btfsc CCP4CON,CCP4M0 ; check for channel or space goto DO_SPACE ; mark / space switch DO_MARK bsf CCP4CON,CCP4M0 ; set for falling edge compare ...... DO_SPACE bcf CCP4CON,CCP4M0 ; set for rising edge compare Steve On 3 August 2012 11:46, Jan-Erik Soderholm <spam_OUTjan-erik.soderholmTakeThisOuTtelia.com>wrote: {Quote hidden}> Hi. > > Checked datasheet for 12F683 and 16F690. > > In the CCP section, "Compare mode", it says : > > When a match occurs, the CCP1 module may: > - Toggle the CCP1 output. <<<=== Note! > - Set the CCP1 output. > - Clear the CCP1 output. > ... > The action on the pin is based on the value of the > CCP1M<3:0> control bits of the CCP1CON register. > > > Now, the table for the CCP1CON register says : > > 1000 = Compare mode, set output on match (CCP1IF bit is set) > 1001 = Compare mode, clear output on match (CCP1IF bit is set) > > There is no "toggle output on match" option there > > Is this a (known) datasheet error? > There is nothing in the errata documents. > > Jan-Erik. >

What about: 0010 = Compare mode, toggle output on match (CCP1IF bit is set) >From page 127 of 41262E.pdf Matt On 3 August 2012 20:46, Jan-Erik Soderholm <.....jan-erik.soderholmKILLspam@spam@telia.com> wrote: {Quote hidden}> Hi. > > Checked datasheet for 12F683 and 16F690. > > In the CCP section, "Compare mode", it says : > > When a match occurs, the CCP1 module may: > - Toggle the CCP1 output. <<<=== Note! > - Set the CCP1 output. > - Clear the CCP1 output. > ... > The action on the pin is based on the value of the > CCP1M<3:0> control bits of the CCP1CON register. > > > Now, the table for the CCP1CON register says : > > 1000 = Compare mode, set output on match (CCP1IF bit is set) > 1001 = Compare mode, clear output on match (CCP1IF bit is set) > > There is no "toggle output on match" option there > > Is this a (known) datasheet error? > There is nothing in the errata documents. > > Jan-Erik. >

OK. It now seems as this a difference between the CCP and the ECCP modules. Thanks all. Jan-Erik. Matt Callow wrote 2012-08-03 13:35: {Quote hidden}> What about: > 0010 = Compare mode, toggle output on match (CCP1IF bit is set) >>From page 127 of 41262E.pdf > > Matt > > On 3 August 2012 20:46, Jan-Erik Soderholm <jan-erik.soderholmKILLspamtelia.com> wrote: >> Hi. >> >> Checked datasheet for 12F683 and 16F690. >> >> In the CCP section, "Compare mode", it says : >> >> When a match occurs, the CCP1 module may: >> - Toggle the CCP1 output. <<<=== Note! >> - Set the CCP1 output. >> - Clear the CCP1 output. >> ... >> The action on the pin is based on the value of the >> CCP1M<3:0> control bits of the CCP1CON register. >> >> >> Now, the table for the CCP1CON register says : >> >> 1000 = Compare mode, set output on match (CCP1IF bit is set) >> 1001 = Compare mode, clear output on match (CCP1IF bit is set) >> >> There is no "toggle output on match" option there >> >> Is this a (known) datasheet error? >> There is nothing in the errata documents. >> >> Jan-Erik. >> -

Hi again. I wrote > It now seems as this a difference between the CCP and > the ECCP modules. and I should have added : ....and an error in at least the datasheet for the 12F683 where the option "Toggle the CCP1 output" simply is wrong. Someone else (on a swedish electronics forum) just made a test using the 12F683 and the option "0010" which is the toggle option when using the *E*CCP. This *did* toggle the output pin on the 12F683, but at a fixed rate equal to the full 16 bit count of Timer1. It could not be adjusted using the usual register CCPR1 and/or TMR1. So it is for practical use unusable and the docs should probably be adjusted. Jan-Erik. CCP1M<3:0>: CCP Mode Select bits 0000 = Capture/Compare/PWM off (resets CCP module) 0001 = Unused (reserved) 0010 = Unused (reserved) <<== this is the "toggle" setting on ECCP. 0011 = Unused (reserved) 0100 = Capture mode, every falling edge 0101 = Capture mode, every rising edge 0110 = Capture mode, every 4th rising edge 0111 = Capture mode, every 16th rising edge 1000 = Compare mode, set output on match (CCP1IF bit is set) 1001 = Compare mode, clear output on match (CCP1IF bit is set) 1010 = Compare mode, generate software interrupt on match..... 1011 = Compare mode, trigger special event..... 110x = PWM mode active-high 111x = PWM mode active-low Jan-Erik Soderholm wrote 2012-08-03 13:49: {Quote hidden}> OK. > > It now seems as this a difference between the CCP and > the ECCP modules. > > Thanks all. > > Jan-Erik. > > > > Matt Callow wrote 2012-08-03 13:35: >> What about: >> 0010 = Compare mode, toggle output on match (CCP1IF bit is set) >>> From page 127 of 41262E.pdf >> >> Matt >> >> On 3 August 2012 20:46, Jan-Erik Soderholm <.....jan-erik.soderholmKILLspam.....telia.com> >> wrote: >>> Hi. >>> >>> Checked datasheet for 12F683 and 16F690. >>> >>> In the CCP section, "Compare mode", it says : >>> >>> When a match occurs, the CCP1 module may: >>> - Toggle the CCP1 output. <<<=== Note! >>> - Set the CCP1 output. >>> - Clear the CCP1 output. >>> ... >>> The action on the pin is based on the value of the >>> CCP1M<3:0> control bits of the CCP1CON register. >>> >>> >>> Now, the table for the CCP1CON register says : >>> >>> 1000 = Compare mode, set output on match (CCP1IF bit is set) >>> 1001 = Compare mode, clear output on match (CCP1IF bit is set) >>> >>> There is no "toggle output on match" option there >>> >>> Is this a (known) datasheet error? >>> There is nothing in the errata documents. >>> >>> Jan-Erik. >>> --

In the CCP section, "Compare mode", it says : When a match occurs, the CCP1 module may: - Toggle the CCP1 output. <<<=== Note! - Set the CCP1 output. - Clear the CCP1 output. The compare mode with toggle output on match is 0010 - see page 129 of PIC16F631 and family (includes the 690) DS4126D 2007. Colin -- cdb, EraseMEcolinspam_OUTTakeThisOuTbtech-online.co.uk on 6/08/2012 Web presence: http://www.btech-online.co.uk Hosted by: http://www.justhost.com.au This email is to be considered private if addressed to a named individual or Personnel Department, and public if addressed to a blog, forum or news article.

Yes, I know, in those PICs that has the *ECCP* module ! But e.g. the 12F683 (with the CCP module) has the same writing in the "Compare mode" section even if it the 0010 option does *not* work i those PICs (that is, all PICs with the older CCP module)... I can not see it as anything but a documentation error. Jan-Erik. cdb wrote 2012-08-06 08:19: {Quote hidden}> In the CCP section, "Compare mode", it says : > > When a match occurs, the CCP1 module may: > - Toggle the CCP1 output. <<<=== Note! > - Set the CCP1 output. > - Clear the CCP1 output. > > The compare mode with toggle output on match is 0010 - see page 129 of > PIC16F631 and family (includes the 690) DS4126D 2007. > > Colin > -- > cdb, colinspam_OUTbtech-online.co.uk on 6/08/2012 > > Web presence: http://www.btech-online.co.uk > > Hosted by: http://www.justhost.com.au > > > This email is to be considered private if addressed to a named individual > or Personnel Department, and public if addressed to a blog, forum or news > article. > > >

On Mon, 06 Aug 2012 10:02:44 +0200, Jan-Erik Soderholm wrote: :: :: But e.g. the 12F683 (with the CCP module) has the same :: writing in the "Compare mode" section even if it the :: 0010 option does *not* work i those PICs (that is, all :: PICs with the older CCP module)... From what i can see it has a 'manual' toggle in that it can set or clear the output on match by using 1000 and 1001 respectively. I suppose the only way to make it toggle would be to have a flag variable that changed the CCP settings every alternate CCP1IF. I'm looking at the 2004 edition of the datasheet and I don't see any mention of the CCP having the toggle option. Colin -- cdb, @spam@colinKILLspambtech-online.co.uk on 6/08/2012 Web presence: http://www.btech-online.co.uk Hosted by: http://www.justhost.com.au This email is to be considered private if addressed to a named individual or Personnel Department, and public if addressed to a blog, forum or news article.

cdb wrote 2012-08-06 11:45: > On Mon, 06 Aug 2012 10:02:44 +0200, Jan-Erik Soderholm wrote: > :: > :: But e.g. the 12F683 (with the CCP module) has the same > :: writing in the "Compare mode" section even if it the > :: 0010 option does *not* work i those PICs (that is, all > :: PICs with the older CCP module)... > > From what i can see it has a 'manual' toggle in that it can set or clear > the output on match by using 1000 and 1001 respectively. > > I suppose the only way to make it toggle would be to have a flag variable > that changed the CCP settings every alternate CCP1IF. > > I'm looking at the 2004 edition of the datasheet and I don't see any > mention of the CCP having the toggle option. > > Colin You did not say what version you are reading (why not?), but... I just now downloaded the current datasheet for PIC12F683 from Microchip, 41211D_.PDF (don't ask me what the underscore does there) The datasheet is dated 2007, b.t.w. On page 77, section "11.2 Compare Mode" it says: "When a match occurs, the CCP1 module may: - Toggle the CCP1 output. - Set the CCP1 output. - Clear the CCP1 output. - Generate a Special Event Trigger. - Generate a Software Interrupt." I have an older version ("B", from 2004) it it says : "When a match occurs, the GP2/AN2/T0CKI/INT/COUT/CCP1 pin is: - Driven high - Driven low - Remains unchanged" Weird... Jan-Erik. {Quote hidden}> > -- > cdb, KILLspamcolinKILLspambtech-online.co.uk on 6/08/2012 > > Web presence: http://www.btech-online.co.uk > > Hosted by: http://www.justhost.com.au > > > This email is to be considered private if addressed to a named individual > or Personnel Department, and public if addressed to a blog, forum or news > article. > > > > >