Post by thread:Serial

Nope, Andy I meant no stopbit. What effect does putting a stop bit in have on the reliability? Bryan (PS It's extremely easy to add one to the routine.) -- --------------------------------- BRYAN CROTAZ - spam_OUTb.crotazTakeThisOuTic.ac.uk --------------------------------- TECHNICAL MANAGER Student Television Of Imperial College Beit Quad, Prince Consort Road London SW7 2BB Tel. 0171-594-8104 Fax. 0171-594-8065 Attn. STOIC { NOTE NEW FAX NUMBER }

On Feb 19, 9:41, Bryan Crotaz wrote: } Subject: Serial > Nope, Andy I meant no stopbit. > What effect does putting a stop bit in have on the reliability? > > Bryan > > (PS It's extremely easy to add one to the routine.) > I hope I'm not butting in and grabbed the wrong end of the stick. I assume RS232 style comms are under discussion. The stop bit is required for two reasons that I can think of: * Timing considerations (the data word is expected to be, say, 10 bits long) * Ensuring correct start bit detection. The stop bit is high and the next start bit is low, thus providing a reliable transition. Adding extra stop bits (more than one) can't harm things because the stop bit value is the same as the idle state. Obviously it can knock performance a bit. -- Charles

Bryan Crotaz (.....b.crotazKILLspam@spam@ic.ac.uk) wrote: >Nope, Andy I meant no stopbit. >What effect does putting a stop bit in have on the reliability? Bryan: Without at least one stop bit after each character, there's no way to detect the start bit of the next character. -Andy -- Andrew Warren - fastfwdKILLspamix.netcom.com Fast Forward Engineering, Vista, California

hi folks is there anyone out there that can help me with some code or where to get it to communicate with a pic through a serial link thanks in advance richard

At 21.30 23-03-1997 -0800, you wrote: >hi folks >is there anyone out there that can help me with some code or where to >get it to communicate with a pic through a serial link > >thanks in advance > >richard > > Hi Richard Some of the 16Cxx devices have serial communication possibilities built in, just program the appropriate registers according to the data sheets and you're running. Beware of the errata sheets though. For instance, on the 16C74 you're adviced not to use a certain baudrate setting mode. For the other 16Cxx devices, get application note AN555, "Software Implementation of Asynchronous Serial I/O", document DS00555B on the Microchip website. It gives you both sample schematics and a lot of code. Good luck Michael

At 02:50 PM 1/19/98 +0100, you wrote: > Anyone has created a working serial rtx routine with auto-baud > for a 16C84?? Buy Myke Predko's PIC book. It's available from Amazon.com or more info from http://www.myke.com It has what you want. I built one. Works great! Andy ================================================================== Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA ==================================================================

> > Anyone has created a working serial rtx routine with auto-baud > for a 16C84?? > Yes... > > - *Alex* - > > (EraseMEazummospam_OUTTakeThisOuTita.flashnet.it) ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

Il 19-Gen-98, Andy Kunz scrisse: >At 02:50 PM 1/19/98 +0100, you wrote: >> Anyone has created a working serial rtx routine with auto-baud >> for a 16C84?? >Buy Myke Predko's PIC book. It's available from Amazon.com or more info >from http://www.myke.com >It has what you want. I built one. Works great! A quite expensive serial routine.. :-) is this the favourite book of piclisters? :-) I've readed about it more than four times.. i'll probably buy it.... Thanks. -- - *Alex* - (azummospam_OUTita.flashnet.it)

>A quite expensive serial routine.. :-) is this the favourite book There's lots more useful stuff than the serial device. There's IR, CRC, random numbers, and more. In other words, working examples (with disk) of everything the newbies on this list ask for. Andy ================================================================== Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA ==================================================================

part 0 751 bytes -- Mitch ------------------------------ Mitch Miller @spam@mdmillerKILLspamnque.com ------------------------------ {Original Message removed}