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???
12/20/05 15:38
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#105599 - If signal transmitted is randomly
Responding to: ???'s previous message
Anand said:
i am trying to implement a project wherin i have to autosense the baud rate of incoming serial data.


Give the RxD signal also to a free port line and measure the time period between succeeding transitions. Store the results. Look for the shortest interval of the list and check, whether there are others which are as short or up to 5% longer. If not, remove this shortest interval, and look for the next shortest interval. Check again, whether there are others which are as short or up to 5% longer. The number of similar short intervals should at least be 10% of total number of stored intervals. This should then be the bit time of transmission.

Then, you can detect whether 8 or 9 bits are transmitted.

Kai

List of 11 messages in thread
TopicAuthorDate
Help to sense baud rate of incoming data            01/01/70 00:00      
   Search for Auto-baud or Automatic baud..            01/01/70 00:00      
      Search            01/01/70 00:00      
         a good link to have (save it)            01/01/70 00:00      
   Normally not needed            01/01/70 00:00      
      Known start sequence            01/01/70 00:00      
   In the code Library            01/01/70 00:00      
   Time machine(part 2!)            01/01/70 00:00      
   If signal transmitted is randomly            01/01/70 00:00      
      n x T            01/01/70 00:00      
         1 x T            01/01/70 00:00      

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