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-rw-r--r--cores/arduino/HardwareSerial.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp
index 6bbef7a..806fe5f 100644
--- a/cores/arduino/HardwareSerial.cpp
+++ b/cores/arduino/HardwareSerial.cpp
@@ -332,7 +332,7 @@ int HardwareSerial::read(void)
void HardwareSerial::flush()
{
// UDR is kept full while the buffer is not empty, so TXC triggers when EMPTY && SENT
- while (transmitting && ! (*_ucsra & _BV(TXC0)));
+ while (transmitting && bit_is_clear(*_ucsra, TXC0));
transmitting = false;
}