PortentaX8: allow using RPC as fake Serial

Author: facchinm

cores/arduino/Arduino.h

@@ -112,6 +112,16 @@ extern analogin_config_t adcCurrentConfig;
 #define Serial3 _UART3_
 #define Serial4 _UART4_
 
+#if defined(RPC_SERIAL)
+#undef Serial
+#if __has_include("RPC.h")
+#define Serial RPC
+#else
+extern ErrorSerialClass ErrorSerial;
+#define Serial ErrorSerial
+#endif
+#endif
+
 #include "overloads.h"
 #endif
 

libraries/RPC/src/RPC.cpp

@@ -139,7 +139,7 @@ static void disableCM4Autoboot() {
   }
 }
 
-int RPCClass::begin() {
+int RPCClass::begin(long unsigned int np, uint16_t nd) {
 
 	OpenAMP_MPU_Config();
 
@@ -194,7 +194,7 @@ int RPCClass::begin() {
 
 #ifdef CORE_CM4
 
-int RPCClass::begin() {
+int RPCClass::begin(long unsigned int np, uint16_t nd) {
 
   eventThread = new rtos::Thread(osPriorityHigh);
   eventThread->start(&eventHandler);

libraries/RPC/src/RPC.h

@@ -44,7 +44,7 @@ namespace arduino {
 class RPCClass : public Stream, public rpc::detail::dispatcher {
 	public:
 		RPCClass() {};
-		int begin();
+		int begin(long unsigned int = 0, uint16_t = 0);
 		void end() {};
 		int available(void) {
 			return rx_buffer.available();

variants/PORTENTA_X8/pins_arduino.h

@@ -100,7 +100,7 @@ static const uint8_t SCK  = PIN_SPI_SCK;
 #define PIN_WIRE_SDA        (11u)
 #define PIN_WIRE_SCL        (12u)
 
-//#define SERIAL_CDC			0
+#define RPC_SERIAL				1
 #define HAS_UNIQUE_ISERIAL_DESCRIPTOR
 #define BOARD_VENDORID		0x2341
 #define BOARD_PRODUCTID		0x0061
@@ -136,4 +136,31 @@ void _ontouch1200bps_();
 
 #define USB_MAX_POWER	(500)
 
+#ifdef __cplusplus
+
+#include "api/HardwareSerial.h"
+
+#define MACRO_ERROR_SERIAL_STR "\n\n****\nPlease include RPC library to use Serial\n****\n\n"
+#define MACRO_ERROR_SERIAL __attribute__ ((error(MACRO_ERROR_SERIAL_STR)))
+
+class ErrorSerialClass : public arduino::HardwareSerial {
+public:
+	ErrorSerialClass() {};
+	~ErrorSerialClass() {};
+	void MACRO_ERROR_SERIAL begin(long unsigned int);
+	void MACRO_ERROR_SERIAL begin(long unsigned int, uint16_t);
+	size_t MACRO_ERROR_SERIAL write(uint8_t);
+	MACRO_ERROR_SERIAL operator bool();
+	void MACRO_ERROR_SERIAL end();
+	int MACRO_ERROR_SERIAL peek();
+	int MACRO_ERROR_SERIAL read();
+	int MACRO_ERROR_SERIAL available();
+	void MACRO_ERROR_SERIAL flush();
+};
+
+extern ErrorSerialClass ErrorSerial;
+
+#endif
+
+
 #endif //__PINS_ARDUINO__