I'm working on an applicaiton that requires UART communications to be inverted. I'm having a hard time figuring out whether or not this is possible when looking through docs. I'm using an EFR32MG12. I have found that it's possible to invert RX on IrDA, but not just normal UART communications.
Based on the reference manual, it looks the USART/LEUART support invert,
search and try the word TXINV in the reference manual.