Diff: DigitalIn.h

Revision:

0:a8fa94490a0a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DigitalIn.h	Sat Sep 22 10:32:07 2012 +0000
@@ -0,0 +1,102 @@
+/* mbed Microcontroller Library - DigitalIn
+ * Copyright (c) 2006-2011 ARM Limited. All rights reserved.
+ */ 
+ 
+#ifndef MBED_DIGITALIN_H
+#define MBED_DIGITALIN_H
+
+#include "platform.h"
+#include "PinNames.h"
+#include "PeripheralNames.h"
+#include "Base.h"
+
+namespace mbed {
+
+/* Class: DigitalIn
+ *  A digital input, used for reading the state of a pin
+ *
+ * Example:
+ * > // Flash an LED while a DigitalIn is true
+ * >
+ * > #include "mbed.h"
+ * >
+ * > DigitalIn enable(p5);
+ * > DigitalOut led(LED1);
+ * >
+ * > int main() {
+ * >     while(1) {
+ * >         if(enable) {
+ * >             led = !led;
+ * >         }
+ * >         wait(0.25);
+ * >     }
+ * > }
+ */
+class DigitalIn : public Base {
+
+public:
+
+    /* Constructor: DigitalIn
+     *  Create a DigitalIn connected to the specified pin
+     *
+     * Variables:
+     *  pin - DigitalIn pin to connect to
+     *  name - (optional) A string to identify the object
+     */
+    DigitalIn(PinName pin, const char *name = NULL);
+
+    /* Function: read
+     *  Read the input, represented as 0 or 1 (int)
+     *
+     * Variables:
+     *  returns - An integer representing the state of the input pin, 
+     *      0 for logical 0 and 1 for logical 1
+     */
+    int read() {
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+        return ((_gpio->FIOPIN & _mask) ? 1 : 0);
+#elif defined(TARGET_LPC11U24)
+        return ((LPC_GPIO->PIN[_index] & _mask) ? 1 : 0);
+#endif
+    }
+
+
+    /* Function: mode
+     *  Set the input pin mode
+     *
+     * Variables:
+     *  mode - PullUp, PullDown, PullNone, OpenDrain
+     */
+    void mode(PinMode pull);
+    
+#ifdef MBED_OPERATORS    
+    /* Function: operator int()
+     *  An operator shorthand for <read()>
+     */
+    operator int() {
+        return read();
+    }
+
+#endif
+
+#ifdef MBED_RPC
+    virtual const struct rpc_method *get_rpc_methods();
+    static struct rpc_class *get_rpc_class();
+#endif
+
+protected:
+
+    PinName             _pin;
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    LPC_GPIO_TypeDef    *_gpio;
+#elif defined(TARGET_LPC11U24)
+    int _index;
+#endif
+    uint32_t            _mask;
+
+};
+
+} // namespace mbed
+
+#endif
+