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'PICs and serial communications...'
2000\03\23@162116 by Ian Wilkinson

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Sorry, this is probably a bit basic, but I'm a new at using PICs, but have
to do so for my university project,
I need one that can do serial I/O so that it can communicate with a PC.

Sorry I know I've not followed the tips in the FAQ, but I need to know first
what sort PICs would be suitable before I get one.

Thank you for your time.

Ian Wilkinson.

2000\03\23@173241 by Andrew Kelley

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9600 8N1
serin: read a byte; put it in rxreg
serout: send a byte; in txreg

Andrew

On Thu, 23 Mar 2000 21:04:30 -0000 Ian Wilkinson
<spam_OUTcoderTakeThisOuTspamSGTWILKO.FREESERVE.CO.UK> writes:
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2000\03\23@173522 by Andrew Kelley

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Oh and ahh it runs on an 16f/c84.
It runs at 4 mhz

I suggest starting with the 16f84.(USD$6.25)

Andrew

On Thu, 23 Mar 2000 21:04:30 -0000 Ian Wilkinson
<.....coderKILLspamspam@spam@SGTWILKO.FREESERVE.CO.UK> writes:
{Quote hidden}

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2000\03\24@042902 by Joe McCauley

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You're asking a really vague question here. Lots of PICs have built in UARTS
and varying functionality apart from that. You would be better off letting
the list know what else you need this PIC to do apart from serial comms.

Many of the 16Cxx series have UARTS as do the 16Fxx series the 17C4x and the
17C7Xxx.

Joe

{Original Message removed}

2000\03\24@045419 by Michael Rigby-Jones

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part 0 3073 bytes
<P><FONT SIZE=2 FACE="Arial">You're asking a really vague question here. Lots of PICs have built in UARTS</FONT>
<BR><FONT SIZE=2 FACE="Arial">and varying functionality apart from that. You would be better off letting</FONT>
<BR><FONT SIZE=2 FACE="Arial">the list know what else you need this PIC to do apart from serial comms.</FONT>
</P>

<P><FONT SIZE=2 FACE="Arial">Many of the 16Cxx series have UARTS as do the 16Fxx series the 17C4x and the</FONT>
<BR><FONT SIZE=2 FACE="Arial">17C7Xxx.</FONT>
</P>

<P><FONT SIZE=2 FACE="Arial">Joe</FONT>
</P>
</UL>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">I think you mean the 16Fxxx series.&nbsp; The only members of the 16Fxx are the '83 and '84, neither of which have hardware UARTS.&nbsp; Of course, serial comms is possible with *any* PIC if you don't mind bit bashing it.</FONT></P>
<UL>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Mike Ribgy-Jones</FONT>
</P>

<P><FONT SIZE=2 FACE="Arial">{Original Message removed}

2000\03\24@072304 by Jim Robertson

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At 09:40 AM 3/24/00 -0000, you wrote:
>>>>



-----Original Message-----
From:   Joe McCauley [SMTP:pmcculeyspamKILLspamTCD.IE]
Sent:   Friday, March 24, 2000 9:23 AM
To:     .....PICLISTKILLspamspam.....MITVMA.MIT.EDU
Subject:        Re: PICs and serial communications...

You're asking a really vague question here. Lots of PICs have built in UARTS
and varying functionality apart from that. You would be better off letting
the list know what else you need this PIC to do apart from serial comms.

Many of the 16Cxx series have UARTS as do the 16Fxx series the 17C4x and the
17C7Xxx.

Joe

I think you mean the 16Fxxx series.  The only members of the 16Fxx are the
'83 and '84, neither of which have hardware UARTS.  Of course, serial comms
is possible with *any* PIC if you don't mind bit bashing it.

Mike Ribgy-Jones


The 16Fxxx family consists of the 16F873,874,876,877 (+ 872 shortly) all of
which have hardware UARTs. There is also the 16F627, 628 parts that have
one if my memory is good. (I am not sure these are yet available.)

However the 16F84, 83 do not have a hardware UART as pointed out above and
you can always do serial
comms via software or bit banging as it is commonly known as.

Generally all 28-pin (except 16C5x parts) and all 40-pin and larger pinout
PICs have UARTS. PICs with less than 28-pins do not have UARTS though this
will change no doubt.

Regards,

Jim Robertson
NEWFOUND ELECTRONICS
________________________________________
Email: EraseMEnewfoundspam_OUTspamTakeThisOuTpipeline.com.au
http://www.new-elect.com
MPLAB compatible PIC programmers.
________________________________________

2000\03\24@113704 by Lea

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Hi Ian, there are two ways:
the easy one is to buy a PIC that support hardware SCI bus, like
16C73 or 16c74 , they are a bit expensive, but very easy to program
and runs at practically all baud rates,in full duplex, and also
leave the PIC free for other tasks.

The second choice (not so easy) is using a 16F84 (cheaper) and
preform software SCI routines, I have been tested this way but, my
code does not work well at speeds higher than 19200 baud, and
half duplex only.

It depends of how busy the PIC will be with other tasks.
I can send you some example code for both cases if you want.

see you byby.
>
>Sorry, this is probably a bit basic, but I'm a new at using PICs, but have
>to do so for my university project,
>I need one that can do serial I/O so that it can communicate with a PC.
>
  Leandro J. Laporta (LU2AOQ)      mail: lu2aoqspamspam_OUTyahoo.com
wrk: Arg. Assoc. for Space Tech.    ham: TCP/IP high speed group HSG


__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
http://im.yahoo.com

2000\03\24@114915 by Joe McCauley

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-----Original Message-----
> From:   Joe McCauley [SMTP:@spam@pmcculeyKILLspamspamTCD.IE]
> Sent:   Friday, March 24, 2000 9:23 AM
> To:     KILLspamPICLISTKILLspamspamMITVMA.MIT.EDU
> Subject:        Re: PICs and serial communications...
>
> You're asking a really vague question here. Lots of PICs have built in
UARTS
> and varying functionality apart from that. You would be better off letting
> the list know what else you need this PIC to do apart from serial comms.
>
> Many of the 16Cxx series have UARTS as do the 16Fxx series the 17C4x and
the
> 17C7Xxx.
>
> Joe
>
> I think you mean the 16Fxxx series.  The only members of the 16Fxx are the
> '83 and '84, neither of which have hardware UARTS.  Of course, serial
comms
> is possible with *any* PIC if you don't mind bit bashing it.
>
> Mike Ribgy-Jones
>


Ooops,
You are quite right of course!! I forgot the extra x in the 16Fxx.

Joe

2000\03\26@213307 by Ian Wilkinson

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Thanks to All who replied.

I may go down the software route, I don't know if anyone on this list lives
in England, but as far as I know the only place I can get pics is from a
firm called Maplin, who seem to have stopped stocking all the pics that they
had said had built in serial I/O.

I will be seeing what pics I can get and what programmers are easy to build.

Thank you again for your time.

Ian.


(replies Snipped)

2000\03\27@031740 by Alan B Pearce

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In the UK a selection of PIC's are available from RS Components, and I believe
farnell have some too, although I have not checked them. I suspect you will find
you can get the individual chips from magenta as they do the ICD board that has
recently been mentioned on this list.

2000\03\27@052706 by Arthur Brown

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ii the UK there are the following supliers <no connection with them>
http://www.fored.co.uk
http://www.esr.co.uk
http://www.crownhill.co.uk
http://asamicros.com  these do DonTronic stuff

all the best Art


----- Original Message -----
From: Alan B Pearce <RemoveMEA.B.PearceTakeThisOuTspamRL.AC.UK>
To: <spamBeGonePICLISTspamBeGonespamMITVMA.MIT.EDU>
Sent: Monday, March 27, 2000 9:16 AM
Subject: Re: PICs and serial communications...


| In the UK a selection of PIC's are available from RS Components, and I
believe
| farnell have some too, although I have not checked them. I suspect you
will find
| you can get the individual chips from magenta as they do the ICD board
that has
| recently been mentioned on this list.
|

2000\03\27@194003 by Nigel Goodwin

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In message <03bf01bf9794$97620280$0100a8c0@?.f9.co.uk>, Ian Wilkinson
<TakeThisOuTcoderEraseMEspamspam_OUTSGTWILKO.FREESERVE.CO.UK> writes
>Thanks to All who replied.
>
>I may go down the software route, I don't know if anyone on this list lives
>in England, but as far as I know the only place I can get pics is from a
>firm called Maplin, who seem to have stopped stocking all the pics that they
>had said had built in serial I/O.
>
>I will be seeing what pics I can get and what programmers are easy to build.

Try buying a copy of 'Everyday and Practical Electronics', there are a
number of advertisers in there selling PIC's. You could try
http//http://www.fored.co.uk or http://www.asamicros.com, and both Farnells and
RS Components stock PIC's.
--

Nigel.

       /--------------------------------------------------------------\
       | Nigel Goodwin   | Internet : RemoveMEnigelgspamTakeThisOuTlpilsley.demon.co.uk     |
       | Lower Pilsley   | Web Page : http://www.lpilsley.demon.co.uk |
       | Chesterfield    | Official site for Shin Ki and New Spirit   |
       | England         |                 Ju Jitsu                   |
       \--------------------------------------------------------------/

2000\03\28@152244 by Ian Wilkinson

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Thanks to Alan B Pearce, Lance Allen, Mark Willis, Arthur Brown, Andy
Howard, Mike W and everyone else who replied.

I am looking at PICs that can do serial IO, as I need to be able to read
data from the serial port run a user defined series of commands based on
information held in a EEPROM.  It must also be posible for the PIC to update
this EEPROM when it is connected to a PC.

I presume this is all easy to do (with the exception of the user macros in
the EEPROM, I understand it may be very difficult to get a pic to read these
and base what it does on them).

Thanks for all your time.

Ian.

> In the UK a selection of PIC's are available from RS Components, and I
believe
> farnell have some too, although I have not checked them. I suspect you
will find
> you can get the individual chips from magenta as they do the ICD board
that has
> recently been mentioned on this list.
>

2000\03\29@032347 by Arthur Brown

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bechance you build a dongle try 16F877  all the Rom and Ports you need. I
have desided to use in 98% of all new work. keepinf the 73 &84 only where
space is at a premium
Art
{Original Message removed}

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