Fix STM32 flush of TX (used by UBL) (MarlinFirmware#16197)

griehsler · Jan 30, 2020 · 5aef294 · 5aef294
1 parent e016cfb
commit 5aef294
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Marlin/src/core/serial.h b/Marlin/src/core/serial.h
@@ -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)