Added USBSerial operator int() to test for USB connectivity (a-la Leo…

…nardo)

Former-commit-id: 76a4078

hardware/pic32/cores/pic32/HardwareSerial.cpp

@@ -582,6 +582,10 @@ USBSerial::USBSerial(ring_buffer	*rx_buffer)
 	_rx_buffer->tail	=	0;
 }
 
+USBSerial::operator int() {
+    return gConnected ? 1 : 0;
+}
+
 #ifdef _DEBUG_USB_VIA_SERIAL0_
 	#define	DebugViaSerial0(x)	Serial0.println(x)
 #else

hardware/pic32/cores/pic32/HardwareSerial.h

@@ -141,6 +141,7 @@ class USBSerial : public Stream
 		virtual	void	write(uint8_t);
 		virtual void	write(const char *str);
 		virtual void	write(const uint8_t *buffer, size_t size);
+        operator        int();
 
 		using	Print::write; // pull in write(str) and write(buf, size) from Print
 };

hardware/pic32/cores/pic32/HardwareSerial_cdcacm.c

@@ -164,7 +164,7 @@ static int			gRX_length[NRX];
 static volatile byte			gRX_in;
 static volatile byte			gRX_out;
 
-static boolean      gConnected = false;
+boolean      gConnected = false;
 
 
 //*******************************************************************************

hardware/pic32/cores/pic32/HardwareSerial_cdcacm.h

@@ -7,6 +7,7 @@
 #define     USB_SERIAL_MIN_BUFFER_FREE      128
 
 extern boolean gCdcacm_active;
+extern boolean gConnected;
 
 typedef void (*cdcacm_reset_cbfn)(void);
 typedef boolean (*cdcacm_storedata_cbfn)(const byte *buffer, int length);