Diff: cpp/BusOut.h

Revision:

0:fd0d7bdfcdc2

Child:

2:143cac498751

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cpp/BusOut.h	Tue Nov 20 17:24:08 2012 +0000
@@ -0,0 +1,82 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef MBED_BUSOUT_H
+#define MBED_BUSOUT_H
+
+#include "DigitalOut.h"
+
+namespace mbed {
+
+/** A digital output bus, used for setting the state of a collection of pins
+ */
+class BusOut {
+
+public:
+
+    /** Create an BusOut, connected to the specified pins
+     *
+     *  @param p<n> DigitalOut pin to connect to bus bit <n> (p5-p30, NC)
+     *
+     *  @note
+     *  It is only required to specify as many pin variables as is required
+     *  for the bus; the rest will default to NC (not connected)
+     */
+    BusOut(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
+           PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
+           PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
+           PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
+
+    BusOut(PinName pins[16]);
+
+    virtual ~BusOut();
+
+    /** Write the value to the output bus
+     *
+     *  @param value An integer specifying a bit to write for every corresponding DigitalOut pin
+     */
+    void write(int value);
+
+    /** Read the value currently output on the bus
+     *
+     *  @returns
+     *    An integer with each bit corresponding to associated DigitalOut pin setting
+     */
+    int read();
+
+#ifdef MBED_OPERATORS
+    /** A shorthand for write()
+     */
+    BusOut& operator= (int v);
+    BusOut& operator= (BusOut& rhs);
+
+    /** A shorthand for read()
+     */
+    operator int();
+#endif
+
+protected:
+    DigitalOut* _pin[16];
+};
+
+} // namespace mbed
+
+#endif