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Commit ebdf8b6b authored by randellhodges's avatar randellhodges Committed by Scott Lahteine
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Fix STM32 flush of TX (used by UBL) (#16197)

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Marlin/src/core/serial.h
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......@@ -75,7 +75,7 @@ extern uint8_t marlin_debug_flags;
#define SERIAL_PRINTF(V...) SERIAL_OUT(printf, V)
#define SERIAL_FLUSH() SERIAL_OUT(flush)
#ifdef __STM32F1__
#ifdef ARDUINO_ARCH_STM32
#define SERIAL_FLUSHTX() SERIAL_OUT(flush)
#elif TX_BUFFER_SIZE > 0
#define SERIAL_FLUSHTX() SERIAL_OUT(flushTX)
......
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