mbed UART0 print message

Revision:
0:1d715454a185
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Oct 20 12:36:04 2016 +0000
@@ -0,0 +1,9 @@
+// using NuMaker-PFM-NUC472 pinout
+#include "mbed.h"
+ 
+Serial device(PG_2, PG_1);  // TX0, RX0
+ 
+int main() {
+    device.baud(115200); // set UART0 baudrate at 115200
+    device.printf("Hello ARM mbed\n\r");
+}