Post by thread:[PIC]:a newbie mpasm question (what is skpz/skpnz)

At 03:38 PM 5/9/01 +0100, sam woolf wrote: >skpz and snpnz are not listed as part of the instruction set of the 16f84 in >the book I've been learning from (Easy Pic'n, D. Benson) >What are they/do they do? >Sam. They are described in the MPASM manual. They are pseudo-ops that are translated automatically by MPASM into the proper mnemonics. They are used when it is desired to make the code easier to read and understand. The one that I use all the time are: skpc, skpnc skip if Carry set / not set skpz, skpnz skip if Zero / not Zero skpdc, skpndc skip if Digit Carry set / not set setc, setz, setdc set Z bit / C bit / DC bit clrc, clrz, clrdc clear Z / C / DC Note that they work with MPASM but may or may not work with other assemblers. dwayne Dwayne Reid <spam_OUTdwaynerTakeThisOuTplanet.eon.net> Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 17 years of Engineering Innovation (1984 - 2001) * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Michael Brown Instant Net Solutions http://www.KillerPCs.net ----- Original Message ----- From: "sam woolf" <.....samwKILLspam@spam@COGS.SUSX.AC.UK> To: <PICLISTKILLspamMITVMA.MIT.EDU> Sent: Wednesday, May 09, 2001 9:38 AM Subject: Re: [PIC]:a newbie mpasm question (what is skpz/skpnz) > skpz and snpnz are not listed as part of the instruction set of the 16f84 in > the book I've been learning from (Easy Pic'n, D. Benson) > What are they/do they do? I believe they are built in macro's to the assembler. skpz = btfss STATUS, Z skpnz = btfsc STATUS, Z {Quote hidden}> Sam. > > > ----- Original Message ----- > From: "Bob Ammerman" <.....RAMMERMANKILLspam.....PRODIGY.NET> > To: <EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU> > Sent: Monday, May 07, 2001 7:14 PM > Subject: Re: [PIC]:a newbie mpasm question > > > > Olin, you got it wrong and so did I .... > > > > sigh.... > > > > The correct snippet is: > > > > movlw PIN0 > > andwf PIN0,W > > skpz ---or--- snpnz as needed > > > > Bob Ammerman > > RAm Systems > > (contract development of high performance, high function, low-level > > software) > > > > ----- Original Message ----- > > From: "Olin Lathrop" <olin_piclistspam_OUTEMBEDINC.COM> > > To: <@spam@PICLISTKILLspamMITVMA.MIT.EDU> > > Sent: Monday, May 07, 2001 12:29 PM > > Subject: Re: [PIC]:a newbie mpasm question > > > > > > > > PIN0 EQU B'00000001' > > > > PIN1 EQU B'00000010' > > > > ; > > > > MOVF PIN0,W > > > > > > You want the value of PIN0 into W, not the contents of the location at > > > address PIN0. Use MOVLW PIN0. > > > > > > > XORWF PORTA > > > > > > To avoid altering PORTA, you should append ", W". This writes the > result > > of > > > the XOR into W instead of PORTA. > > > > > > > BTFSS STATUS,Z > > > > > > > > > ******************************************************************** > > > Olin Lathrop, embedded systems consultant in Littleton Massachusetts > > > (978) 742-9014, KILLspamolinKILLspamembedinc.com, http://www.embedinc.com > > > > > > -- > > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > > > > > > > -- > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.