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???
10/11/04 16:03
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#79147 - RE: RATING SYSTEM
Responding to: ???'s previous message
Prahlad J. Purohit wrote:

"If one uses a better derivate say P89V51RD2 running at 40MHz in 6 cyle mode some other derivate in single cycle mode I don't think 10 devices in software bit banged UART are a problem."

I wouldn't want to keep track of ten separate, uncorrelated devices and bit-bang them.

"I never said my scheme will cater to all 10 devices simultaneously I have kept saying one device at a time and other devices on hold by handshaking signal."

I suspect that Ravi's application might not support that.

"The PC soft must be special and you can't use the standard programs like i.e. flip or others. "

Exactly -- and it's fairly common that the host software is thought to be trivial, when it's usually the hardest part of the process. Either you write a special device driver that makes your board look to windows like ten separate COM: devices (and so can be used by Hyperterminal or some such standard app), or you write a custom app. Either way, it'll take longer (and cost more $$$ in development) than buying a couple of quad-port (or an 8-port) serial card, or a terminal server.

-a

List of 47 messages in thread
TopicAuthorDate
connecting multiply RS232 to pc            01/01/70 00:00      
   RE: connecting multiply RS232 to pc            01/01/70 00:00      
      RE: connecting multiply RS232 to pc            01/01/70 00:00      
   RE: connecting multiply RS232 to pc            01/01/70 00:00      
      RE: connecting multiply RS232 to pc            01/01/70 00:00      
         RE: connecting multiply RS232 to pc            01/01/70 00:00      
      RE: connecting multiply RS232 to pc            01/01/70 00:00      
         RE: connecting multiply RS232 to pc            01/01/70 00:00      
            RE: connecting multiply RS232 to pc            01/01/70 00:00      
               RE: connecting multiply RS232 to pc            01/01/70 00:00      
            RE: Optimistic?            01/01/70 00:00      
            The simplest? ;-D            01/01/70 00:00      
               RE: The simplest? ;-D            01/01/70 00:00      
         RE: Costs (again)            01/01/70 00:00      
      RE: connecting multiply RS232 to pc            01/01/70 00:00      
         RE: connecting multiply RS232 to pc            01/01/70 00:00      
            RE: connecting multiply RS232 to pc            01/01/70 00:00      
            RE: connecting multiply RS232 to pc            01/01/70 00:00      
      RATING SYSTEM            01/01/70 00:00      
         RE: RATING SYSTEM            01/01/70 00:00      
         RE: RATING SYSTEM            01/01/70 00:00      
            RE: RATING SYSTEM            01/01/70 00:00      
               RE: RATING SYSTEM            01/01/70 00:00      
                  RE: RATING SYSTEM            01/01/70 00:00      
                     RE: RATING SYSTEM            01/01/70 00:00      
                        RE: bit bang            01/01/70 00:00      
                     RE: RATING SYSTEM            01/01/70 00:00      
                     Statistical Multiplexer            01/01/70 00:00      
               RE: RATING SYSTEM            01/01/70 00:00      
                  RE: RATING SYSTEM            01/01/70 00:00      
               significant advantage in Hard UART            01/01/70 00:00      
                  RE: significant advantage in Hard UART            01/01/70 00:00      
         RE: RATING SYSTEM            01/01/70 00:00      
            RE: RATING SYSTEM            01/01/70 00:00      
      Nostalgia            01/01/70 00:00      
   Designer judgement needed            01/01/70 00:00      
      Missed bytes - Raghu            01/01/70 00:00      
   RE: connecting multiply RS232 to pc            01/01/70 00:00      
   RE: connecting multiply RS232 to pc            01/01/70 00:00      
   RS232-Ethernet            01/01/70 00:00      
   Statistical Multiplexer            01/01/70 00:00      
      RE: Statistical Multiplexer            01/01/70 00:00      
   RE: connecting multiply RS232 to pc            01/01/70 00:00      
   if selfbuild            01/01/70 00:00      
   RE: connecting multiply RS232 to pc            01/01/70 00:00      
      RE: connecting multiply RS232 to pc            01/01/70 00:00      
   Hopefully the war is over :-)            01/01/70 00:00      

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