CAN to TTL converter & serial port

Hi Everyone,

This is a question that displays my ignorance regarding the CAN bus - so if it’s been answered before or should be obvious please be gentle with me LOL.

Most autpilots seems to sport a pair of TTL serial ports. I’d like to add extra ports for TTL serial devices, for example gimbal controllers, GPS and the like. Is there a way to convert CAN to TTL and address the port within Ardupilot?

I’d prefer not to ditch perfectly good TTL serial devices that don’t support CAN bus hence the question.

Thanks in advance.