Why don't you connect all the Serial pins up to the same pin?
Use Serin with the "Flag" or "Qualifier" to acknowledge good data.
You can have bi-directional via one pin...a slave and/or master.
When you use Serin on 3 different pins...You can still use the Qualifier, but I would use a very short "timeout". And either way, there is no guarantee you will lose a packet or two sometime or another. You may have to keep sending until you receive your data from the chip, them send a "receive" bit.
Dwayne
Ability to Fly:
Hurling yourself towards the ground, and missing.
Engineers that Contribute to flying:
Both optimists and pessimists contribute to the society. The optimist invents the aeroplane, the pessimist the parachute
Pilots that are Flying:
Those who know their limitations, and respect the green side of the grass...
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