Sanity check SERIAL_PORT

Addressing #7400
6 years ago · f64d300cfd
1 changed files with 4 additions and 0 deletions
--- a/Marlin/src/inc/SanityCheck.h
+++ b/Marlin/src/inc/SanityCheck.h
@ -281,6 +281,10 @@
  #error "SERIAL_XON_XOFF and SERIAL_STATS_* features not supported on USB-native AVR devices."
 #endif

+#if SERIAL_PORT > 7
+  #error "Set SERIAL_PORT to the port on your board. Usually this is 0."
+#endif
+
 /**
 * Dual Stepper Drivers
 */