Post by thread:[PIC]: Problem with first 16F877 test program (PLA

Thanks Olin, I see your point.. Hi All, I'm new to PICs and am trying to "port" my Z80 assembler skills to something that belongs in this century but am having problems with my test program. Here it is: LIST p=16f877,c=140 include "p16f877.inc" org 0 clrf STATUS goto BootStart org 4 ISR goto 5 ; Setup Interupt Address org 5 BootStart clrf PORTB bsf STATUS,RP0 ; set RAM Page 1 for TRIS registers movlw b'00000000' movwf TRISB ; set PORTB for all outputs bcf STATUS,RP0 ; back to RAM page 0 LoopAgain ;movlw 0x00 ;movwf PORTB ; All PORTB bits off ;movlw 0xFF ;movwf PORTB ; All PORTB bits on incf W, 0 ; W = W + 1 movwf PORTB ; PORTB = W goto LoopAgain end Now I thought that 'incf W, 0' would perform a W=W+1 operation, and that when it reached 255, it would simply start from 0 (since it's an 8-bit register), but this doesn't seem to be the case. If I use the 4 commented lines instead of the 3 lower ones, then I get a nice square wave on all 8 I/O pins, so I know the PIC is working and that my programmer is ok etc. All I expect the above test program to do is count in binary flashing 8 LEDs.... So what stupid thing am I doing wrong... Any help much appreciated, Joe -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Try this: INCF PORTB, F ; Race the PORT B. GOTO LoopAgain ; Thank you Sir, may I have another? * | __O Thomas C. Sefranek spam_OUTWA1RHPTakeThisOuTARRL.NET |_-\<,_ Amateur Radio Operator: WA1RHP (*)/ (*) Bicycle mobile on 145.41, 448.625 MHz hamradio.cmcorp.com/inventory/Inventory.html http://www.harvardrepeater.org > {Original Message removed}

You can *not* use W as the source for any instruction that operates on some SFR or GPR. Only as the target (result, to the right of the comma in your example). This is one of the nice things with the 18F series, where the W register also is "mapped" as SFR "WREG", btw. Jan-Erik Söderholm. > incf W, 0 ; W = W + 1 -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> Thanks Olin, I see your point.. But apparently not enough to do anything about it: > MIME-Version: 1.0 > Content-Type: text/plain; charset="us-ascii" > Content-Transfer-Encoding: quoted-printable ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, 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

I think most of the time you post only to get your adverstisement on the list just one more time... {Quote hidden}>From: Olin Lathrop <.....olin_piclistKILLspam@spam@EMBEDINC.COM> >Reply-To: pic microcontroller discussion list <PICLISTKILLspamMITVMA.MIT.EDU> >To: .....PICLISTKILLspam.....MITVMA.MIT.EDU >Subject: Re: [PIC]: Problem with first 16F877 test program (PLAIN TEXT) >Date: Sat, 1 Feb 2003 17:55:21 -0500 > > > Thanks Olin, I see your point.. > >But apparently not enough to do anything about it: > > > MIME-Version: 1.0 > > Content-Type: text/plain; charset="us-ascii" > > Content-Transfer-Encoding: quoted-printable > > >***************************************************************** >Embed Inc, embedded system specialists in Littleton Massachusetts >(978) 742-9014, 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 _________________________________________________________________ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Well Olin, Since I don't have an Email client that dates back from the 50's, it's difficult to test - so I changed to plain text on the hope it would suit you. If you ask me, personally I think it looks lame, but you didn't so... As for the '>' thing, I think your find that it's your Email client that puts those in... Everybody else who managed to decipher my totally unreadable text... thanks for your constructive help. I'm much wiser, on many fronts. {Original Message removed}

On Saturday 01 February 2003 04:55 pm, you wrote: > > Thanks Olin, I see your point.. > > But apparently not enough to do anything about it: > > MIME-Version: 1.0 > > Content-Type: text/plain; charset="us-ascii" > > Content-Transfer-Encoding: quoted-printable > > ***************************************************************** > Embed Inc, embedded system specialists in Littleton Massachusetts > (978) 742-9014, http://www.embedinc.com I don't know what's wrong with your e-mail client (now), but you may wish to check into it. Some reasons to switch *your* mail clent would be: 1) OE doesn't wrap correctly, which causes much mangling of the replies. (I really hate this) 2) It still doesn't do the signature according to the RFC, even though it's 5 versions later. 3) It is single handedly responsible for the majority of the internet virus problems. 4) It's default settings violate all nettiquete rules. Oh yeah, and one other dumb thing about it..... begin big_scary_virus.vbs -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

OE gets a bad rap because the userbase dosent know how to use it. the people who use other clients are generally far more computer literate if OE is kept up to date and the person has some idea of what they are doing then there are few problems with it that i have noticed. (i've had many real viruses sent to me and never been infected) {Original Message removed}

> As for the '>' thing, I think your find that it's your > Email client that puts those in... That's exactly the problem. It's supposed to, but doesn't for some reason when replying to messages that were sent with quoted printable encoding. It does it correctly for plain text messages. I manually added the "> " to the two lines above. I'm using MS Outlook Express 6.00.2600.0000. I've got the boxes checked for "Insert > in front of lines replying too" and "Include message in reply", and unchecked "Reply to messages using the format in which they were sent". If anyone can tell me how to make Outlook Express initialize the replies to quoted printable messages properly I'd be glad to try it. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

> Some reasons to switch *your* mail clent would be: > 1) OE doesn't wrap correctly, which causes much mangling of the replies.=20 > (I really hate this) I hate this too. Does anyone know how to make MS Outlook Express properly wrap the text your write, but not wrap text you are replying to? That's what I'd like it to do, but I can only get it to either wrap all or wrap none, so I set it to all. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

On Sunday 02 February 2003 11:36 am, you wrote: > > Some reasons to switch *your* mail clent would be: > > 1) OE doesn't wrap correctly, which causes much mangling of the > > replies.=20 > > > (I really hate this) > > I hate this too. Does anyone know how to make MS Outlook Express > properly wrap the text your write, but not wrap text you are replying > to? That's what I'd like it to do, but I can only get it to either > wrap all or wrap none, so I set it to all. I don't know of any way to actually fix OE, but if you install oe-quotefix, it will make life better for you. It fixes the wrapping issue and also the signature line separator will be compliant. It has some other features you may or may not like. http://home.in.tum.de/~jain/software/oe-quotefix/ The best fix is to stop using OE, of course. ;-) michael -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Olin Lathrop wrote: > If anyone can tell me how to make Outlook Express initialize > the replies to quoted printable messages properly I'd be glad to try it. There is a free program here that apparently fixes this and other quoting problems in OE: http://jump.to/oe-quotefix Jason Harper -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

>> I don't know of any way to actually fix OE, but if you install oe-quotefix, it will make life better for you. It fixes the wrapping issue and also the signature line separator will be compliant. It has some other features you may or may not like. home.in.tum.de/~jain/software/oe-quotefix/ << Hm. Looks interesting. Have you or anyone else actually used this? I don't want to end up installing a trojan horse. > The best fix is to stop using OE, of course. ;-) Ain't gonna happen. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

On Sun, 2 Feb 2003, Olin Lathrop wrote: *>> The best fix is to stop using OE, of course. ;-) *> *>Ain't gonna happen. Well you can try something else from time to time. Eudora is known to have a lot of users and relatively few complaints. It's been around for a while too. Peter -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

On Sunday 02 February 2003 02:03 pm, you wrote: > I don't know of any way to actually fix OE, but if you install > oe-quotefix, it will make life better for you. It fixes the wrapping > issue and also the signature line separator will be compliant. It > has some other features you may or may not like. > > home.in.tum.de/~jain/software/oe-quotefix/ > << > > Hm. Looks interesting. Have you or anyone else actually used this? > I don't want to end up installing a trojan horse. I used it for a while, it worked ok, but did seem to have it's own little quirks. It was a newish version at the time and, IIRC there have been a couple of releases since then. > > The best fix is to stop using OE, of course. ;-) > > Ain't gonna happen. Too bad for you. ;-) How about telling me whats up with my PWM/comparator issue. Does the data sheet mean to say that I shouldn't operate the comparator inputs (16f628) with less than .6V or more than 4.4V for reliable operation? (assuming a 5.0V supply) michael -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics