review RC parsing and NuttX parity bit

[dagar]

SBUS uses an even parity bit. Is it actually being used with current NuttX?

• https://github.com/uzh-rpg/rpg_quadrotor_control/wiki/SBUS-Protocol
• https://github.com/PX4/Firmware/blob/master/src/lib/rc/sbus.cpp#L214-L218

[dagar]

@davids5 what was the conclusion here?

[davids5]

It is configured in the correct mode IIRC the error is not propagated nor that chatrater dropped. The issues that shed light on this was a mis configuration. There is some "Framing" in the decoder that may detect a problem or not. Are there any open issues that indicate SBUS related problems?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Thank you for your contributions.

[junwoo091400]

Is this still an issue?

[davids5]

There is a PR in to test a fix #19446 but I am not sure if the testing that has been done is testing the right things or reporting the right problems.