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iagenjo
iagenjo
Visitor II
February 10, 2011
Question

USART3 at 7E1 problem

  • February 10, 2011
  • 2 replies
  • 656 views
Posted on February 10, 2011 at 08:35

USART3 at 7E1 problem

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    2 replies

    Tesla DeLorean
    Tesla DeLorean
    Guru
    May 17, 2011
    Posted on May 17, 2011 at 14:24

    Do you think USART is correctly programmed for 7E1 conditions?

     

    No.

    Parity might appear to ''work'' for about half the bit patterns, and the stop bit is a problem. Once the receiver registers a parity error, that needs to be cleared before more data arrives.

    You'd be better to program the USART as 8N1, and create the ''parity'' bit in software (ie  7+1 bits = 8 bits)
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    Andrew Neil
    Andrew Neil
    Super User
    May 17, 2011
    Posted on May 17, 2011 at 14:24

    ''It 's not defined the option USART_WordLength_7b''

     

    Are you sure that the hardware supports it?

    What does the Datasheet/User Manual say?
    A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
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