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Avoid stalling if uart buffer becomes full #260

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Avoid stalling if uart buffer becomes full #260

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6 changes: 5 additions & 1 deletion cores/arduino/Uart.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,11 @@ size_t Uart::write(const uint8_t data)
if (sercom->isDataRegisterEmptyUART() && txBuffer.available() == 0) {
sercom->writeDataUART(data);
} else {
while(txBuffer.isFull()); // spin lock until a spot opens up in the buffer
while (txBuffer.isFull()) {
// Pretend an interrupt has happened and
// call the handler to free up space for us.
IrqHandler();
};

txBuffer.store_char(data);

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