Diff: api/BusIn.h

Revision:

455:8bc3a354916d

Parent:

212:34d62c0b2af6

diff -r a07e52520545 -r 8bc3a354916d api/BusIn.h
--- a/api/BusIn.h	Tue Jan 27 07:15:07 2015 +0000
+++ b/api/BusIn.h	Tue Jan 27 13:30:08 2015 +0000
@@ -58,15 +58,35 @@
      */
     void mode(PinMode pull);
 
+    /** Binary mask of bus pins connected to actual pins (not NC pins)
+     *  If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1
+     *
+     *  @returns
+     *    Binary mask of connected pins
+     */
+    int mask() {
+        return _nc_mask;
+    }
+
 #ifdef MBED_OPERATORS
     /** A shorthand for read()
      */
     operator int();
+
+    /** Access to particular bit in random-iterator fashion
+     */
+    DigitalIn & operator[] (int index);
 #endif
 
 protected:
     DigitalIn* _pin[16];
 
+    /** Mask of bus's NC pins
+     * If bit[n] is set to 1 - pin is connected
+     * if bit[n] is cleared - pin is not connected (NC)
+     */
+    int _nc_mask;
+
     /* disallow copy constructor and assignment operators */
 private:
     BusIn(const BusIn&);