Direct SBUS Output on Ardupilot-Linux ports

@james_pattison wrote:

Topic: Direct SBUS Output on Ardupilot-Linux ports

Proposal type: Hardware [ ] , Software [x ] , Other [ ] : _________________

Description:
Implementing a 100kb/s inverted uart would facilitate simple linux ports without requiring a pca9685 or px4IO to externally generate pwm - it could be done simply via an easy to access sbus converter. UARTs are generally at a premium on SBC's, but it should be possible to bit-bang. If it was a bi-directional uart, this would also provide SBUS input. If it was pin assignable via a param this may make it easily portable and aid broader uptake for Ardupilot on Linux (input and output seems to be more difficult than sensor drivers).
Planned amount $$ (USD): unknown

Estimated time for completion: Unknown - this is a suggestion, as I don't have the skills to do it myself!

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