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kinetis:kinetis_lowputc Fixed parity settings.

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Kinetis UART must be placed in 9 bit mode (M=1) with when 8 bit
  data with parity is required. If left in 8 bit mode (M=0) with
  parity then D7 of the TX/RX register becomes parity bit. Hence
  what is called 9-bit or 8-bit Mode Select is a misnomer.
  8 bit mode when parity is enabled is realy 7 bit with parity.
This commit is contained in:
David Sidrane 2018-05-30 01:43:10 -10:00 • committed by Gregory Nutt
parent f9819e1f5f
commit b2edfac2dd
1 changed files with 5 additions and 2 deletions
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7
arch/arm/src/kinetis/kinetis_lowputc.c
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@ -645,9 +645,12 @@ void kinetis_uartconfigure(uintptr_t uart_base, uint32_t baud,
DEBUGASSERT(parity == 0);
}
/* Check for 9-bit operation */
/* Check for 9-bit operation or enter 9 bit mode for 8 bit with parity
* see K66 Sub-Family Reference Manual, Rev. 2, May 2015
* 59.5.4 Data format
*/
if (nbits == 9)
if (nbits == 9 || (nbits == 8 && parity != 0))
{
regval |= UART_C1_M;
}