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???
03/18/09 07:31
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 		 #163562 - you can't have different baudrates...
Responding to: ???'s previous message
... at the same time in ANY single UART.

You will need either a dual-UART derivative, or, maybe in this case better, have an external UART (or an other '52) connected. But, beware, to process data coming/going at 250kBaud, you'd better choose a derivative with higher processing power (some of the single-clockers - the DS89C450 comes with 2 UARTs, for example).

JW

PS: These are unique baudrates: I'd bet it's a MIDI-to-DMX gateway project, isn't it?


List of 53 messages in thread
TopicAuthorDate
Is possible? AT89S52 with dual serial baud rate            01/01/70 00:00      
   yes...            01/01/70 00:00      
   Use Timer 2...            01/01/70 00:00      
      Can I have both at same time?            01/01/70 00:00      
         you can't have different baudrates...            01/01/70 00:00      
         YES            01/01/70 00:00      
         No, unless...            01/01/70 00:00      
            what registers?            01/01/70 00:00      
               Split-speed common in older times            01/01/70 00:00      
               Timer 2 registers of AT89S52            01/01/70 00:00      
   Where can I read...            01/01/70 00:00      
      Well, in the datasheet!            01/01/70 00:00      
      Tutorials; FAQs            01/01/70 00:00      
   You have two UART's ... Does that give you any ideas?            01/01/70 00:00      
   Timer2 baudrate            01/01/70 00:00      
      unconfuse yourself            01/01/70 00:00      
      What's wrong with page 15 of datasheet?            01/01/70 00:00      
      Trying this...            01/01/70 00:00      
         Have a look at this code example...            01/01/70 00:00      
            This damn 52 think it is a 51 !!!            01/01/70 00:00      
               counterfeit chip?            01/01/70 00:00      
   It is for a Midi to DMX project... new trouble            01/01/70 00:00      
      Alternatives            01/01/70 00:00      
         examples            01/01/70 00:00      
            Options            01/01/70 00:00      
   Found the crystal!            01/01/70 00:00      
      Let's see ... What is wanted here ...            01/01/70 00:00      
         He is already using two timers            01/01/70 00:00      
            Independent UARTs            01/01/70 00:00      
               Crystal seens OK - Could receive Midi.. "partially" send DMX            01/01/70 00:00      
                  Well done!            01/01/70 00:00      
                  Russel Bull... Can you please take a look in my code?            01/01/70 00:00      
                  I wouldn't use serial transmission interrupts            01/01/70 00:00      
                     Makes sense!            01/01/70 00:00      
                        Give this a try...            01/01/70 00:00      
                           Hard to find a place to test.            01/01/70 00:00      
                              Runtime of LCALL...            01/01/70 00:00      
                           stop bits            01/01/70 00:00      
                              TI flag is set at the begin of (first) stop bit!            01/01/70 00:00      
                                 TI/RI setting time            01/01/70 00:00      
                                    TI and RI details...            01/01/70 00:00      
   TI/RI question            01/01/70 00:00      
      what causes a serial int?            01/01/70 00:00      
      More things will happen...            01/01/70 00:00      
         If....            01/01/70 00:00      
            Yes            01/01/70 00:00      
   YEAAAAAAAAH! IT WORKED            01/01/70 00:00      
      Congrats!            01/01/70 00:00      
         Thanks really a lot!            01/01/70 00:00      
   A new challenge! The inverse way!            01/01/70 00:00      
      BREAK detection is lousy!            01/01/70 00:00      
         RB8            01/01/70 00:00      
            RB8 details...            01/01/70 00:00      

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