[Nucleo F429ZI] Disable Serial1/Serial2 by default

To save RAM space, Serial1 and Serial2 are disabled by default.
To enable them add -DENABLE_SERIAL1 and/or -DENABLE_SERIAL2

Signed-off-by: Frederic.Pillon <[email protected]>

Author: fpistm

Diff for: boards.txt

@@ -33,6 +33,8 @@ Nucleo_144.menu.Nucleo_144_board.NUCLEO_F429ZI.build.variant=NUCLEO_F429ZI
 Nucleo_144.menu.Nucleo_144_board.NUCLEO_F429ZI.build.cmsis_lib_gcc=arm_cortexM4l_math
 #To enable USB add '-DUSBCON'
 #To enable HID (keyboard and mouse support) add also '-DUSBD_USE_HID_COMPOSITE'
+#To enable Serial1 (USART1 on PG9, PG14) add -DENABLE_SERIAL1
+#To enable Serial2 (USART2 on PD6, PD5) add -DENABLE_SERIAL2
 Nucleo_144.menu.Nucleo_144_board.NUCLEO_F429ZI.build.extra_flags=-DSTM32F429xx {build.usb_flags}
 
 

Diff for: variants/NUCLEO_F429ZI/variant.cpp

@@ -133,23 +133,34 @@ const PinName digitalPin[] = {
  * UART objects
  */
 HardwareSerial  Serial(PD9, PD8); // Connected to ST-Link
+#ifdef ENABLE_SERIAL1
 HardwareSerial  Serial1(PG9, PG14);
+#endif
+#ifdef ENABLE_SERIAL2
 HardwareSerial  Serial2(PD6, PD5);
+#endif
 
 void serialEvent() __attribute__((weak));
 void serialEvent() { }
 
+#ifdef ENABLE_SERIAL1
 void serialEvent1() __attribute__((weak));
 void serialEvent1() { }
-
+#endif
+#ifdef ENABLE_SERIAL2
 void serialEvent2() __attribute__((weak));
 void serialEvent2() { }
+#endif
 
 void serialEventRun(void)
 {
   if (Serial.available()) serialEvent();
+#ifdef ENABLE_SERIAL1
   if (Serial1.available()) serialEvent1();
+#endif
+#ifdef ENABLE_SERIAL2
   if (Serial2.available()) serialEvent2();
+#endif
 }
 
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