Additional RawSerial example

Revision:
4:3ad999bfc3c4
Parent:
2:4ab47f33a1ae
--- a/main.cpp	Mon Jul 30 14:24:50 2018 -0500
+++ b/main.cpp	Mon Jul 30 14:25:17 2018 -0500
@@ -3,7 +3,7 @@
 DigitalOut led1(LED1);
 DigitalOut led2(LED2);
 
-Serial pc(USBTX, USBRX);
+RawSerial pc(USBTX, USBRX);
 
 void callback_ex() {
     // Note: you need to actually read from the serial to clear the RX interrupt
@@ -13,7 +13,7 @@
 
 int main() {
     pc.attach(&callback_ex);
-    
+
     while (1) {
         led1 = !led1;
         wait(0.5);