Diff: cpp/PortIn.h

Revision:

0:fd0d7bdfcdc2

Child:

2:143cac498751

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cpp/PortIn.h	Tue Nov 20 17:24:08 2012 +0000
@@ -0,0 +1,99 @@
+/* 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_PORTIN_H
+#define MBED_PORTIN_H
+
+#include "platform.h"
+
+#if DEVICE_PORTIN
+
+#include "port_api.h"
+
+namespace mbed {
+
+/** A multiple pin digital input
+ *
+ *  Example:
+ * @code
+ * // Switch on an LED if any of mbed pins 21-26 is high
+ *
+ * #include "mbed.h"
+ *
+ * PortIn     p(Port2, 0x0000003F);   // p21-p26
+ * DigitalOut ind(LED4);
+ *
+ * int main() {
+ *     while(1) {
+ *         int pins = p.read();
+ *         if(pins) {
+ *             ind = 1;
+ *         } else {
+ *             ind = 0;
+ *         }
+ *     }
+ * }
+ * @endcode
+ */
+class PortIn {
+public:
+
+    /** Create an PortIn, connected to the specified port
+     *
+     *  @param port Port to connect to (Port0-Port5)
+     *  @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
+        */ 
+    PortIn(PortName port, int mask = 0xFFFFFFFF) {
+        port_init(&_port, port, mask, PIN_INPUT);
+    }
+    
+    /** Read the value currently output on the port
+     *
+     *  @returns
+     *    An integer with each bit corresponding to associated port pin setting
+     */
+    int read() {
+        return port_read(&_port);
+    }
+    
+    /** Set the input pin mode
+     *
+     *  @param mode PullUp, PullDown, PullNone, OpenDrain
+     */
+    void mode(PinMode mode) {
+        port_mode(&_port, mode);
+    }
+    
+    /** A shorthand for read()
+     */
+    operator int() { 
+        return read();
+    }
+
+private:
+    port_t _port;
+};
+
+} // namespace mbed
+
+#endif
+
+#endif