🪠 More granular sub-options undef (#27373)

MarlinFirmware · Aug 29, 2024 · 8ac0f14 · 8ac0f14
1 parent 934fc52
commit 8ac0f14
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Showing 8 changed files with 1,445 additions and 1,232 deletions.
diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
@@ -106,7 +106,7 @@
 
 /**
  * Select a third serial port on the board to use for communication with the host.
- * Currently only supported for AVR, DUE, LPC1768/9 and STM32/STM32F1
+ * Currently supported for AVR, DUE, SAMD51, LPC1768/9, STM32/STM32F1/HC32, and Teensy 4.x
  * :[-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
  */
 //#define SERIAL_PORT_3 1

diff --git a/Marlin/src/HAL/SAMD51/HAL.h b/Marlin/src/HAL/SAMD51/HAL.h
@@ -69,6 +69,16 @@
     #endif
   #endif
 
+  #ifdef SERIAL_PORT_3
+    #if SERIAL_PORT_3 == -1
+      #define MYSERIAL3 MSerial0
+    #elif WITHIN(SERIAL_PORT_3, 0, 3)
+      #define MYSERIAL3 MSERIAL(SERIAL_PORT_3)
+    #else
+      #error "SERIAL_PORT_3 must be from 0 to 3. You can also use -1 if the board supports Native USB."
+    #endif
+  #endif
+
   #ifdef MMU2_SERIAL_PORT
     #if MMU2_SERIAL_PORT == -1
       #define MMU2_SERIAL MSerial0