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"Inverted serial port" is when at the Rx pin low level are translated into high level and so on.
Ok, i can do it with a transistor.
You could have a transistor that when the pin out was high it turned the transistor on and pulled the signal low, you would need a pull up resistor to pull the signal high when the transistor wasn't on. I would have thought that this was easier to do in software, something like x = !x
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I need to get an inverted serial port wich I will use to receive streams from a GPS with an old rxtx-radio module.
The question is how to get an inverted serial port in the mbed.