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    • Gregory Nutt's avatar
      0e6ef003
    • Gregory Nutt's avatar
      Update README · 29ae7cae
      Gregory Nutt authored
      29ae7cae
    • hg42's avatar
      Merged in hg42/nuttx/lpc17-disable-FDR (pull request #591) · da051fb3
      hg42 authored
      
      
      disable LPC17 FDR when not used
      
      * disable LPC17 FDR when not used
      
          if a boot loader set the fractional divider (FDR) the baud rate in
          nuttx will be wrong (multiplied by this fraction).
      
          So if it is not used, it should be disabled.
      
          LPC176x docs say:
          "
          DIVADDVAL Baud-rate generation pre-scaler divisor value.
          If this field is 0, fractional baud-rate generator will
          not impact the UARTn baudrate.
      
          MULVAL Baud-rate pre-scaler multiplier value.
          This field must be greater or equal 1 for UARTn to operate properly,
          regardless of whether the fractional baud-rate generator is used or not.
          "
      
          So DIVADDVAL is set to 0 and MULVAL is set to 1.
      
      * symbols found and added
      
      Approved-by: default avatarGregory Nutt <gnutt@nuttx.org>
      da051fb3