Add menu to select old HW revision (Serial working)

Author: facchinm

Diff for: boards.txt

@@ -1,6 +1,6 @@
 # See: http://code.google.com/p/arduino/wiki/Platforms
 
-menu.cpu=Processor
+menu.revision=Revision
 
 ##############################################################
 
@@ -15,6 +15,11 @@ uno2018.upload.maximum_size=32256
 uno2018.upload.maximum_data_size=2048
 uno2018.upload.speed=115200
 
+uno2018.menu.revision.rev2=RevB
+uno2018.menu.revision.rev2.build.extra_flags=
+uno2018.menu.revision.rev1=RevA (Engineering sample)
+uno2018.menu.revision.rev1.build.extra_flags=-DREV_A_ENGINEERING_SAMPLE
+
 uno2018.bootloader.tool=avrdude
 uno2018.bootloader.low_fuses=0xFF
 uno2018.bootloader.high_fuses=0xDE

Diff for: cores/arduino/wiring.c

@@ -392,10 +392,20 @@ void init()
 
 /****************************** USART *****************************************/
 
+#ifdef REV_A_ENGINEERING_SAMPLE
+	/* Configure PORTMUX for USARTS */
+	//PORTMUX.USARTROUTEA = (PORTMUX_USART1_ALT1_gc // MAIN
+	//| PORTMUX_USART0_ALT1_gc // SPARE
+	//| PORTMUX_USART3_ALT1_gc); // DEBUG
+
+	PORTMUX.USARTROUTEA = (PORTMUX_USART0_ALT1_gc // SPARE
+	| PORTMUX_USART3_ALT1_gc); // DEBUG
+#else
 	/* Configure PORTMUX for USARTS */
 	PORTMUX.USARTROUTEA = (PORTMUX_USART1_ALT1_gc // MAIN
 					| PORTMUX_USART0_ALT1_gc // SPARE
 					| PORTMUX_USART3_ALT1_gc); // DEBUG
+#endif
 
 /********************* TCB3 for system time tracking **************************/
 

Diff for: variants/uno2018/pins_arduino.h

@@ -59,8 +59,13 @@ static const uint8_t SCL = PIN_WIRE_SCL;
 //!!BUG in device header file. The RXC and DRE vectors are swapped!!
 #define HWSERIAL0_DRE_VECTOR (USART1_DRE_vect)
 #define HWSERIAL0_RXC_VECTOR (USART1_RXC_vect)
+#ifdef REV_A_ENGINEERING_SAMPLE
+#define PIN_WIRE_HWSERIAL0_RX (12)
+#define PIN_WIRE_HWSERIAL0_TX (11)
+#else
 #define PIN_WIRE_HWSERIAL0_RX (0)
 #define PIN_WIRE_HWSERIAL0_TX (1)
+#endif
 
 // Uno2 Debug USART (not available on headers, only via the EDGB virtual COM port)
 // USART3 on mega4809 (alternative pins)