Multiple updates.

Support for full 16-char status line to be sent to the Raduino.

Added rotary encoder support.

Everything above has been tested and works.

Added rudimentary top-level menu.  Compiles, but not tested yet.

iopcomm/iopcomm.cpp

@@ -151,6 +151,28 @@ void sendIOPTestStatus()
 	sendIOPMessage(m);
 }
 
+//======================================================================
+// TEST STATUS MESSAGE
+//======================================================================
+
+void sendIOPMenuDisplay(const char* text, int8_t secs)
+{
+	IOPMessage m;
+	int l = strlen(text);
+	m.id = IOP_MENU_DISPLAY_MSG;
+	m.len = 17;
+	m.data[0] = uint8_t(secs);
+	for (int i = 0; i < 16; i++) {
+		if (i < l) {
+			m.data[i+1] = text[i];
+		} else {
+			m.data[i+1] = ' ';
+		}
+	}
+	m.data[17] = '\0';
+	sendIOPMessage(m);
+}
+
 //======================================================================
 
 /*