Post by thread:PICs and serial communications...

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.

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_OUTcoderTakeThisOuTSGTWILKO.FREESERVE.CO.UK> writes: {Quote hidden}> 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. Content-Type: application/octet-stream; name="ser.asm" Attachment converted: birth:ser.asm (????/----) (00008576)

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 <.....coderKILLspam@spam@SGTWILKO.FREESERVE.CO.UK> writes: {Quote hidden}> 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. ________________________________________________________________ YOU'RE PAYING TOO MUCH FOR THE INTERNET! Juno now offers FREE Internet Access! Try it today - there's no risk! For your FREE software, visit: dl.http://www.juno.com/get/tagj.

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}

part 0 3073 bytes 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 </UL> 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. <UL> Mike Ribgy-Jones {Original Message removed}

At 09:40 AM 3/24/00 -0000, you wrote: >>>> -----Original Message----- From: Joe McCauley [SMTP:pmcculeyKILLspamTCD.IE] Sent: Friday, March 24, 2000 9:23 AM To: .....PICLISTKILLspam.....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_OUTTakeThisOuTpipeline.com.au http://www.new-elect.com MPLAB compatible PIC programmers. ________________________________________

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: lu2aoqspam_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

-----Original Message----- > From: Joe McCauley [SMTP:@spam@pmcculeyKILLspamTCD.IE] > Sent: Friday, March 24, 2000 9:23 AM > To: KILLspamPICLISTKILLspamMITVMA.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

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)

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.PearceTakeThisOuTRL.AC.UK> To: <spamBeGonePICLISTspamBeGoneMITVMA.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. |

In message <03bf01bf9794$97620280$0100a8c0@?.f9.co.uk>, Ian Wilkinson <TakeThisOuTcoderEraseMEspam_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 : RemoveMEnigelgTakeThisOuTlpilsley.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 | \--------------------------------------------------------------/

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. >