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???
02/04/08 13:33
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#150305 - that will not work
Responding to: ???'s previous message
Use another cable pair - for bus busy
I do not know how long the cable is, but there is a delay and thus there is absolutely nothing (even without delay there would not be) that hinder that two nodes check "bus busy" at the same time and both will start transmitting.

Attempting to avoid bus collisions by a "bus busy" check is doomed to failure.

Erik

PS there is no need for an extra bus busy line tie rx to an interrupt any start bir will interrupt the full chorus.

List of 18 messages in thread
TopicAuthorDate
Multi Master communication RS-485 ?            01/01/70 00:00      
   how fast do you need to go?            01/01/70 00:00      
      Use another cable pair - for bus busy            01/01/70 00:00      
         that will not work            01/01/70 00:00      
   How's about using with MAX1490            01/01/70 00:00      
      what good will that do ?            01/01/70 00:00      
         Common solutions            01/01/70 00:00      
            Multi master my way            01/01/70 00:00      
               Still on progress            01/01/70 00:00      
                  wrong chip?            01/01/70 00:00      
   Maybe Token Ring            01/01/70 00:00      
      ARCNET            01/01/70 00:00      
   re:multimaster            01/01/70 00:00      
      what if two masters send 'busy' at the same time?            01/01/70 00:00      
         re:collision            01/01/70 00:00      
            all good and well; however ...            01/01/70 00:00      
   separate the masters for network            01/01/70 00:00      
      sure, but the problems are the same            01/01/70 00:00      

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