Post by thread:Can you help me about RS-232 protocol with 16F84

<x-flowed>Hello everybody, I want to send and take data from PC by using RS232 protocol and PIC16f84 or PIC16C84 . I know it has not USART/SCI port but I think it can be do by software (by interrupt not polling method) Could you send me this sowfware program or point me? Thanks for your helps... ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com </x-flowed>

part 0 787 bytes content-type:text/x-vcard; charset=us-ascii; name="vcard.vcf" (decoded 7bit) Pailoor levent oral wrote: > Hello everybody, > I want to send and take data from PC by using RS232 protocol and PIC16f84 or > PIC16C84 . I know it has not USART/SCI port but I think it can be do by > software (by interrupt not polling method) Could you send me this sowfware > program or point me? > Thanks for your helps... > > ______________________________________________________ > Get Your Private, Free Email at http://www.hotmail.com Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Description: Card for Ravi Pailoor Content-Disposition: attachment; filename="vcard.vcf" Content-Transfer-Encoding: 7bit Attachment converted: wonderland:vcard.vcf (TEXT/CSOm) (0002F37D)

levent oral wrote: > > Hello everybody, > I want to send and take data from PC by using RS232 protocol and PIC16f84 or > PIC16C84 . I know it has not USART/SCI port but I think it can be do by > software (by interrupt not polling method) Could you send me this sowfware > program or point me? > Thanks for your helps... I am pretty sure somebody will help you with the code for your requirement, but my job here is to be the pest... :) RS232 is not a protocol, is a mechanical and electrical convention of levels and circuit names. Just when you met your friends you shake hands, RS232 defines the arms, hands, fingers, and the mechanical motion to attach both hands and shake them. The "protocol" is how the message would be send and received and the message decoding. In the example it would be who speaks first the "hey, how are you doing buddy?", and who answers, the understanding of how much enfatic you would be with your answer based on the recognition of what kind of "buddy" you just met, if he is friendly or enemy, deserves an answer or not, what means exactly his message and so on. This analytical communication is the protocol, and you use different procotols with different persons, but the physical way still always the same, your body, in this case the RS232. Using the physical RS232 you can use several protocols (they are logical). Even seen it several times being said wrong, there is no microcontroller with RS232 port, no one has, they have lousy TX and RX pins tied to a simple internal (assynchronous only) UART that can not even control the data flow. RS232 turns to exists after the conversion to the standard +12V / -12V inverted levels, with the addition of the minimum set of circuits DTR/DSR/RTS/CTS, most of the time ignored, tied up or down. Don't be mad, just doing my daily "pestering job".. :) Wagner