Is it possible to invert the UART/UARTE logic in the nRF52832?

[LoungingHound]

We have a need to invert the TTL logic for the serial interface. All our "Unique" SWI serial interfaces use an inverted logic e.g. idle state 0 instead of idle state 1.

This has a number of benefits for us in the systems our hardware is designed to run on. We have a number of existing products which use an AVR processor which supports this configuration, and it is easy to implement. We now want to implement this with an nRF52832 based module and would prefer not to add a hardware inverter, if possible.

However I cannot see in the configuration files an method to configure the onboard UART/UARTE device in a similar manner, but I am not confident with all the features and capabilities of the nRF52832 yet.

The other possibility is to use a software serial function instead (we only need to support 9600 or 19200 baud, and only send and receive 8-10 byte packets once or twice a day.) Has anyone successfully implemented this within the nRF52832?

[Dmitry]

If you have 4 free pins, you can try to create two "hardware inverters" inside 52832 with two pairs of GPIOTE channels - one will generate an event for low-to-high transition on input pin and trigger a CLR task for output pin, and vice-versa. Though I can't say how it will affect power consumption...