Added test for timer to check member function attached

libraries/tests/mbed/ticker_mfun/main.cpp

@@ -0,0 +1,41 @@
+#include "mbed.h"
+
+Ticker tick;
+DigitalOut led(LED1);
+
+namespace {
+    const int MS_INTERVALS = 1000;
+}
+
+class TickerHandler {
+public:
+    TickerHandler(const int _ms_intervals) : m_ticker_count(0), m_ms_intervals(_ms_intervals) {
+    }
+
+    void print_char(char c = '*')
+    {
+        printf("%c", c);
+        fflush(stdout);
+    }
+
+    void togglePin(void)
+    {
+        if (ticker_count >= MS_INTERVALS) {
+            print_char();
+            ticker_count = 0;
+            led = !led; // Blink
+        }
+        ticker_count++;
+    }
+
+protected:
+    int m_ticker_count;
+};
+
+int main()
+{
+    TickerHandler th;
+
+    tick.attach_us(th, TickerHandler::togglePin, 1000);
+    while (1);
+}