zain aftab / mbed-src3

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Dependents:   RPC_Serial_V_mac

Diff: api/BusOut.h

Revision:
456:8bc3a354916d
Parent:
212:34d62c0b2af6
--- a/api/BusOut.h	Tue Jan 27 07:15:07 2015 +0000
+++ b/api/BusOut.h	Tue Jan 27 13:30:08 2015 +0000
@@ -56,12 +56,26 @@
      */
     int read();
 
+    /** 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 write()
      */
     BusOut& operator= (int v);
     BusOut& operator= (BusOut& rhs);
 
+    /** Access to particular bit in random-iterator fashion
+     */
+    DigitalOut& operator[] (int index);
+
     /** A shorthand for read()
      */
     operator int();
@@ -70,6 +84,12 @@
 protected:
     DigitalOut* _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:
     BusOut(const BusOut&);