Post by thread:Help for PIC beginners!

Hi, We have just started using the PIC 16C84 but at the moment we are unable to get much sense out of the software. Although it compiles and programs the switch and lamp circuit does not work. 1)On assembly we get the following messages: Message[302] F:\PIC\PROJECTS\TEST\TEST.ASM 16 : Register in operand not in bank 0. Ensure that bank bits are correct. Message[302] F:\PIC\PROJECTS\TEST\TEST.ASM 22 : Register in operand not in bank 0. Ensure that bank bits are correct. 2)We don't seem to be able to input to porta. Listing: ;***********************INCLUDES************************ INCLUDE P16C84.INC ;***********************EQUATES************************* BUT EQU 1 LED EQU 1 ;***********************THE PROGRAM********************* ORG 00 INIT BSF STATUS,RP0 ;Set up page 1 of registers. MOVLW B'11111' MOVWF TRISA ;Sets porta as an input port. CLRF PORTA ;Clear porta. CLRF PORTB ;Clear portb. MOVLW B'00000000' MOVWF TRISB ;Sets portb as an output port. BCF STATUS,RP0 ;Resets page 0 of registers. MAIN BTFSS PORTA,BUT GOTO MAIN ;Test porta,bit1 until it is set. BSF PORTB,LED ;Set portb,bit1 until it is set. OFF BTFSC PORTA,BUT GOTO OFF ;Test porta,bit1 until it is clear. BCF PORTB,LED ;Clear portb,bit1. GOTO MAIN GOTO INIT END We are using the standard equates from MPS. //////////////////////////////////////////////////////////////// /// Just to let you know we have a web page at ' http://www.innotts.co.uk/~dobbs/ ' //////////////////////////////////////////////////////////////// ///

In message <spam_OUT199705201824.TAA09374TakeThisOuTcarlton.innotts.co.uk>, David Dobbs writes: >Hi, > We have just started using the PIC 16C84 but at the moment we are >unable to get much sense out of the software. Although it compiles and >programs the switch and lamp circuit does not work. >1)On assembly we get the following messages: > > Message[302] F:\PIC\PROJECTS\TEST\TEST.ASM 16 : Register in operand >not in bank 0. Ensure that bank bits are correct. This is to warn you that TRISA is in Bank 1. If it annoys you, you can mask off the warning with something like: NOBANK equ 07fh BSF STATUS,RP0 MOVWF TRISA &NOBANK ; Configure port (One of many ways to handle this situation. YMMV) >2)We don't seem to be able to input to porta. > >Listing: > >INIT BSF STATUS,RP0 ;Set up page 1 of registers. > MOVLW B'11111' > MOVWF TRISA ;Sets porta as an input port. > > CLRF PORTA ;Clear porta. Here is the problem: you need to go back to Bank 0 to access PORTA. TRISA and PORTA are in the same place in alternate banks, so this instruction is actually clearing *TRISA*. Hence all pins get set to output! Move the CLRF to after the BCF STATUS,RP0 (or before the BSF), and all should be well. Regards, David.

David Dobbs <.....PICLISTKILLspam@spam@MITVMA.MIT.EDU> wrote: > We have just started using the PIC 16C84 but at the moment we are > unable to get much sense out of the software. Although it compiles > and programs the switch and lamp circuit does not work. > > 1)On assembly we get the following messages: > > Message[302] F:\PIC\PROJECTS\TEST\TEST.ASM 16 : Register in > operand not in bank 0. Ensure that bank bits are correct. > Message[302] F:\PIC\PROJECTS\TEST\TEST.ASM 22 : Register in > operand not in bank 0. Ensure that bank bits are correct. > > 2)We don't seem to be able to input to porta. David: Your code will work with the following changes. OLD CODE: --------- {Quote hidden}> ORG 00 > > INIT BSF STATUS,RP0 ;Set up page 1 of registers. > MOVLW B'11111' > MOVWF TRISA ;Sets porta as an input port. > > CLRF PORTA ;Clear porta. > CLRF PORTB ;Clear portb. > > MOVLW B'00000000' > MOVWF TRISB ;Sets portb as an output port. > BCF STATUS,RP0 ;Resets page 0 of registers. > > MAIN .... NEW CODE: --------- ORG 00 GOTO INIT ORG 04 RETFIE INIT BSF STATUS,RP0 MOVLW B'11111' MOVWF TRISA^080H MOVLW B'00000000' MOVWF TRISB^080H BCF STATUS,RP0 CLRF PORTA CLRF PORTB MAIN .... The GOTO at location 0 and the RETFIE at location 4 aren't STRICTLY necessary, but they'll prevent any accidental interrupt problems. The "^080H"'s will fix the assembler warnings. The instruction re-ordering is necessary because TRISA and TRISB are on register page 1, while PORTA and PORTB are on register page 0. When you program your PICs, remember to disable the Watchdog Timer. -Andy === Andrew Warren - fastfwdKILLspamix.netcom.com === Fast Forward Engineering, Vista, California === http://www.geocities.com/SiliconValley/2499

At the moment I am writing a windows based program that simulates the PIC16C84. The software is intended for beginers to PICs, more so for students who may be interested in learning to program. It graphically displays how the chip functions, and can run code that you write yourself. There are also modules that can be connected such as a 7 segment display, to see how the ports work. The software still has a way to go but if any one would like to try it I can make a copy available. Some feedback would be welcome. Tony Just when I thought I knew it all, I learned that I didn't.

TONY NIXON 54964 wrote: > > At the moment I am writing a windows based program that simulates the > PIC16C84. The software is intended for beginers to PICs, more so for > students who may be interested in learning to program. It > graphically displays how the chip functions, and can run code that > you write yourself. There are also modules that can be connected > such as a 7 segment display, to see how the ports work. > > The software still has a way to go but if any one would like to try > it I can make a copy available. Some feedback would be welcome. > > Tony > > Just when I thought I knew it all, > I learned that I didn't. Tony, I'd be glad to try your software out. My children are just getting into electronics and this would be a GREAT learning aid for them at the same time saving my box of bits from destruction by them :)). Thanks in advance. Cheers Peter .......... Mailto:.....efocKILLspam.....cyberstop.net +=================================+ | Listen to the Nothing, child, | | Listen to the Don'ts | | Listen to the Never Haves | | The Shouldn'ts, and the Won'ts | | | | Listen to Impossible | | then listen close to me: | | | | Anything can happen, child, | | ANYTHING can be. | | | | Poem by Sal Silverstein | +=================================+

--------- {Quote hidden}> From: TONY NIXON 54964 <EraseMEAnthony.NIXONspam_OUTTakeThisOuTENG.MONASH.EDU.AU> > To: PICLISTspam_OUTMITVMA.MIT.EDU > Subject: Re: Help for PIC beginners! > Date: woensdag 21 mei 1997 0:58 > > At the moment I am writing a windows based program that simulates the > PIC16C84. The software is intended for beginers to PICs, more so for > students who may be interested in learning to program. It > graphically displays how the chip functions, and can run code that > you write yourself. There are also modules that can be connected > such as a 7 segment display, to see how the ports work. > > The software still has a way to go but if any one would like to try > it I can make a copy available. Some feedback would be welcome. > > Tony > > > Just when I thought I knew it all, > I learned that I didn't. I would really like to try it. I'm completly new to PIC programming. I've done programming for the motorola 680X0 familie. this would be a great way to learn the PIC. Greetings Eric. ************************** * Eric Martens * * @spam@emarKILLspamknoware.nl * **************************

{Quote hidden}> TONY NIXON 54964 wrote: > > > > At the moment I am writing a windows based program that simulates the > > PIC16C84. The software is intended for beginers to PICs, more so for > > students who may be interested in learning to program. It > > graphically displays how the chip functions, and can run code that > > you write yourself. There are also modules that can be connected > > such as a 7 segment display, to see how the ports work. > > > > The software still has a way to go but if any one would like to try > > it I can make a copy available. Some feedback would be welcome. > > > > Tony > > > > Just when I thought I knew it all, > > I learned that I didn't. > > Tony, I'd be glad to try your software out. My children are just getting > into electronics and this would be a GREAT learning aid for them at the > same time saving my box of bits from destruction by them :)). Thanks in > advance. > > > Cheers Peter .......... Peter, You might want to download CESSIM84 from our web page. It is a free windows-based PIC16C84 simulator that you can also use as an editor and assembler. You can find a link to download it at: http://www.itutech.com/cessim.htm Chris ---------------------------------------------------------------------- Chris B. Sakkas (KILLspamchrisKILLspamitutech.com) http://www.itutech.com ITU Technologies (RemoveMEinfoTakeThisOuTitutech.com) ftp://itutech.com *** PIC Development tools, Caller ID solutions and more! *** *** VISA and MasterCard accepted (513) 661-7523 ***

Hi Have you seen UMPS by Philippe TECHER <spamBeGonep.techerspamBeGoneIDLS.IZARBEL.TM.FR> in France. It does just what your program will. I would like a copy of your software as I can't afford UMPS! Tim At 08:58 21/05/97 +1000, you wrote: {Quote hidden}>At the moment I am writing a windows based program that simulates the >PIC16C84. The software is intended for beginers to PICs, more so for >students who may be interested in learning to program. It >graphically displays how the chip functions, and can run code that >you write yourself. There are also modules that can be connected >such as a 7 segment display, to see how the ports work. > >The software still has a way to go but if any one would like to try >it I can make a copy available. Some feedback would be welcome. > >Tony > > >Just when I thought I knew it all, >I learned that I didn't. > ------------------------------------------------------------------ Personal Web Pages: http://web.ukonline.co.uk/members/tim.kerby/ PIC Site: web.ukonline.co.uk/members/tim.kerby/pic/ The PIC Pages are under construction and I am looking for projects ------------------------------------------------------------------

Tony Nixon wrote : < At the moment I am writing a windows based program that simulates the < PIC16C84. The software is intended for beginers to PICs, more so for < students who may be interested in learning to program. It < graphically displays how the chip functions, and can run code that < you write yourself. There are also modules that can be connected < such as a 7 segment display, to see how the ports work. < The software still has a way to go but if any one would like to try < it I can make a copy available. Some feedback would be welcome. Yes please Tony !! I would love to try out your software and will report back ! I don't know much about PICs yet but am keen to learn. TTFN Peter.

At 04:29 AM 5/22/97 -0400, you wrote: >< The software still has a way to go but if any one would like to try >< it I can make a copy available. Some feedback would be welcome. Tony, I would very much like to have a copy of your software! Thanks, Michael R. Michael O'Bannon, Ph.D. email: TakeThisOuTmobEraseMEspam_OUTmindspring.com Corporate and Clinical Psychologist voice: 404-237-3883 42 Lenox Pointe, Atlanta, GA 30324 fax: 404-237-3338

Yes, I would like to receive a copy of your mail ---------- {Quote hidden}> From: peter noble <elbonEraseME.....COMPUSERVE.COM> > To: EraseMEPICLISTMITVMA.MIT.EDU > Subject: Re: Help for PIC beginners! > Date: Thursday, May 22, 1997 4:29 AM > > Tony Nixon wrote : > > < At the moment I am writing a windows based program that simulates the > < PIC16C84. The software is intended for beginers to PICs, more so for > < students who may be interested in learning to program. It > < graphically displays how the chip functions, and can run code that > < you write yourself. There are also modules that can be connected > < such as a 7 segment display, to see how the ports work. > > < The software still has a way to go but if any one would like to try > < it I can make a copy available. Some feedback would be welcome. > > Yes please Tony !! I would love to try out your software and will report > back ! > I don't know much about PICs yet but am keen to learn. > > TTFN Peter.

Hi Tony, > The software still has a way to go but if any one would like to try > it I can make a copy available. Some feedback would be welcome. I have a 6 1/2 year old son (he insists on the 1/2), and he and I will be building one of the Dontronics SimmStick 84 systems in the next couple of weeks. A simulator would probably go down a treat, and I'd be happy to give it a go. Cheers, Dieter. -- Dieter Jansen Tetraplex Pty Ltd RemoveMEdieterEraseMEEraseMEtplex.com.au http://www.tplex.com.au/