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Fix UART wrong ::available() during wraparound (#739)

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Fixes #735 .  Thanks to @ Haggarman for the find and fix.
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Earle F. Philhower, III 2022-08-06 09:38:16 -07:00 committed by GitHub
parent 005cba3acd
commit cabb06d495
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cores/rp2040/SerialUART.cpp
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@ -292,7 +292,7 @@ int SerialUART::available() {
} else { } else {
_pumpFIFO(); _pumpFIFO();
} }
return (_writer - _reader) % _fifoSize; return (_fifoSize + _writer - _reader) % _fifoSize;
} }
int SerialUART::availableForWrite() { int SerialUART::availableForWrite() {