Add RP2 PIO background read #15672

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10 errors

Build unexpectedmaker_nanos3 for en_US took 113.97s and failed

Build unexpectedmaker_nanos3 for de_DE took 2.47s and failed

Build unexpectedmaker_nanos3 for en_GB took 2.22s and failed

Build unexpectedmaker_nanos3 for en_x_pirate took 2.28s and failed

Build unexpectedmaker_nanos3 for es took 2.55s and failed

Build unexpectedmaker_nanos3 for fil took 2.36s and failed

Build unexpectedmaker_nanos3 for fr took 2.50s and failed

Build unexpectedmaker_nanos3 for ID took 2.45s and failed

Build unexpectedmaker_nanos3 for it_IT took 2.42s and failed

Build unexpectedmaker_nanos3 for ja took 2.26s and failed