title: PRU UART on the BeagleBone Black
body: <p>I am trying to get the PRU UART of the BeagleBone Black to send/receive 9-bits data.
  I used the stick parity to emulate 8M1 and 8S1 modes but when testing the parity bit is always a 0. it's like always 8S1 mode.
  I even tried to emulate the 8M1 mode to 8N2 mode but the test shows only 1 stop bit is sent.
  Any solution ?</p>