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???
11/22/05 17:02
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 		 #104008 - No Trick
Responding to: ???'s previous message
Tony Gelonese said:
These micros must have been tricked, because they use the same Baud rate, same number of bits, same number of stop bits, same parity, as the silly thing in the PC which thinks is communicating via the RS232C Port and they understand each other perfectly!

Nobody has been tricked!

Nowhere in the 8051 datasheet or "bible" does it mention RS232.

A PC's COM port consists of a UART plus an RS232 transceiver - it's that transceiver that makes all the difference!

An 8051 has only a UART - hence its RD and TD pins do not constitute an "RS232 port" (just as the PC's UART is not in itself an RS232 port).



List of 55 messages in thread
TopicAuthorDate
Home System            01/01/70 00:00      
   X10 ?            01/01/70 00:00      
   1-Wire?            01/01/70 00:00      
      Multiprocessor communcations            01/01/70 00:00      
   home system            01/01/70 00:00      
   Another Maxim - HomePlug            01/01/70 00:00      
   Simple RS232 multidrop            01/01/70 00:00      
      a dangerous approach            01/01/70 00:00      
         NOT dangerous if you read properly            01/01/70 00:00      
            So it's NOT RS232, then            01/01/70 00:00      
               Ohhh No! ..... Not RS232?            01/01/70 00:00      
                  That you get by with violating the stand            01/01/70 00:00      
                     To RS232 or not to RS232            01/01/70 00:00      
                        well, now you have both            01/01/70 00:00      
                  No Trick            01/01/70 00:00      
                  That's what I said!            01/01/70 00:00      
            dont take it personally            01/01/70 00:00      
               I won't            01/01/70 00:00      
                  on reliability etc.            01/01/70 00:00      
                     true, but...            01/01/70 00:00      
                        time is $$$            01/01/70 00:00      
                           Not bible!            01/01/70 00:00      
                        "bible" - Read, not memorise!            01/01/70 00:00      
                        Jeff, grow some skin!            01/01/70 00:00      
                        Paid help            01/01/70 00:00      
                           I agree            01/01/70 00:00      
                              Oh I am grateful            01/01/70 00:00      
               Indeed            01/01/70 00:00      
                  If this is a "put down" then I must need            01/01/70 00:00      
                     Blah blah blah            01/01/70 00:00      
                        flamewars, episode 3            01/01/70 00:00      
                  Toys !            01/01/70 00:00      
                     slobodan            01/01/70 00:00      
                        Arrogance            01/01/70 00:00      
                           totally misunderstood            01/01/70 00:00      
                              It's here            01/01/70 00:00      
                                 sorry, I do not have ESP            01/01/70 00:00      
                                    How would that help?            01/01/70 00:00      
      Long distances            01/01/70 00:00      
      Questions about your Multi MPU comm.            01/01/70 00:00      
         UART Mode 3            01/01/70 00:00      
            Re: El-cheapo home network            01/01/70 00:00      
               as dangerous and noise prone as the othe            01/01/70 00:00      
                  not "open air"            01/01/70 00:00      
                     well, I missed that, sorry            01/01/70 00:00      
                     ring protection            01/01/70 00:00      
         More info M.I.N.E.S.T.O.N.Y. Comms :-)            01/01/70 00:00      
      You must lead a very quiet life            01/01/70 00:00      
         Don't get personal            01/01/70 00:00      
      may be dangerous            01/01/70 00:00      
         RS485            01/01/70 00:00      
            RS485 addendum            01/01/70 00:00      
               RS485 only specifies the media            01/01/70 00:00      
                  Multiprocessor Mode            01/01/70 00:00      
                     comments/clrafications            01/01/70 00:00      

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