This is the encoder code

Dependencies:   mbed

Revision:
0:ddf6b258e38a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Apr 30 23:48:27 2017 +0000
@@ -0,0 +1,27 @@
+#include "mbed.h"
+
+DigitalOut myled(LED1);
+InterruptIn encoder(p15);
+Serial pc(USBTX, USBRX);
+int ticker;
+
+void ticker_func()
+{
+    ticker++;
+    
+}
+int main() {
+    
+    encoder.mode(PullUp);
+    encoder.fall(&ticker_func);
+    encoder.rise(&ticker_func);
+    double distance = 0;
+    
+    while(1) {
+        myled=encoder;
+        distance = double(ticker)*2.5/12;
+        pc.printf("\r\n distance covered '%i'", ticker);
+        wait(1);
+        
+    }
+}