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Added explicit TX port and mask selection on write operation. #48

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Added explicit TX port and mask selection on write operation. #48

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3 changes: 3 additions & 0 deletions src/NeoSWSerial.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -539,6 +539,9 @@ size_t NeoSWSerial::write(uint8_t txChar)
// the last 0 data bit. Then we could wait for the
// remaining 1 data bits and stop bit with interrupts
// re-enabled.

txBitMask = digitalPinToBitMask( txPin );
txPort = portOutputRegister( digitalPinToPort( txPin ) );

while (txBit++ < 9) { // repeat for start bit + 8 data bits
if (b) // if bit is set
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