Diff: InterruptIn.h

Revision:

0:a8fa94490a0a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/InterruptIn.h	Sat Sep 22 10:32:07 2012 +0000
@@ -0,0 +1,149 @@
+/* mbed Microcontroller Library - InterruptIn
+ * Copyright (c) 2006-2011 ARM Limited. All rights reserved.
+ */ 
+ 
+#ifndef MBED_INTERRUPTIN_H
+#define MBED_INTERRUPTIN_H
+
+#include "device.h"
+
+#if DEVICE_INTERRUPTIN
+
+#include "platform.h"
+#include "PinNames.h"
+#include "PeripheralNames.h"
+#include "Base.h"
+#include "FunctionPointer.h"
+
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+#define CHANNEL_NUM   48
+#elif defined(TARGET_LPC11U24)
+#define CHANNEL_NUM    8
+#endif
+
+namespace mbed {
+
+/* Class: InterruptIn
+ *  A digital interrupt input, used to call a function on a rising or falling edge
+ *
+ * Example:
+ * > // Flash an LED while waiting for events
+ * >
+ * > #include "mbed.h"
+ * >
+ * > InterruptIn event(p16);
+ * > DigitalOut led(LED1);
+ * >
+ * > void trigger() {
+ * >     printf("triggered!\n");
+ * > }
+ * >
+ * > int main() {
+ * >     event.rise(&trigger);
+ * >     while(1) {
+ * >         led = !led;
+ * >         wait(0.25);
+ * >     }
+ * > }
+ */
+class InterruptIn : public Base {
+
+public:
+
+    /* Constructor: InterruptIn
+     *  Create an InterruptIn connected to the specified pin
+     *
+     * Variables:
+     *  pin - InterruptIn pin to connect to
+     *  name - (optional) A string to identify the object
+     */
+    InterruptIn(PinName pin, const char *name = NULL);
+#if defined(TARGET_LPC11U24)
+    virtual ~InterruptIn();
+#endif
+ 
+     int read();
+#ifdef MBED_OPERATORS
+    operator int();
+
+#endif
+     
+    /* Function: rise
+     *  Attach a function to call when a rising edge occurs on the input
+     *
+     * Variables:
+     *  fptr - A pointer to a void function, or 0 to set as none
+     */
+    void rise(void (*fptr)(void));
+
+    /* Function: rise
+     *  Attach a member function to call when a rising edge occurs on the input
+     *     
+     * Variables:
+     *  tptr - pointer to the object to call the member function on
+     *  mptr - pointer to the member function to be called
+     */
+    template<typename T>
+    void rise(T* tptr, void (T::*mptr)(void)) {
+        _rise.attach(tptr, mptr);
+        setup_interrupt(1, 1);
+    }
+
+    /* Function: fall
+     *  Attach a function to call when a falling edge occurs on the input
+     *
+     * Variables:
+     *  fptr - A pointer to a void function, or 0 to set as none
+     */
+    void fall(void (*fptr)(void));
+
+    /* Function: fall
+     *  Attach a member function to call when a falling edge occurs on the input
+     *     
+     * Variables:
+     *  tptr - pointer to the object to call the member function on
+     *  mptr - pointer to the member function to be called
+     */
+    template<typename T>
+    void fall(T* tptr, void (T::*mptr)(void)) {
+        _fall.attach(tptr, mptr);
+        setup_interrupt(0, 1);
+    }
+
+    /* Function: mode
+     *  Set the input pin mode
+     *
+     * Variables:
+     *  mode - PullUp, PullDown, PullNone
+     */
+    void mode(PinMode pull);
+    
+    static InterruptIn *_irq_objects[CHANNEL_NUM];
+    
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    static void _irq();
+#elif defined(TARGET_LPC11U24)
+    static void handle_interrupt_in(unsigned int channel);
+    static void _irq0(); static void _irq1();
+    static void _irq2(); static void _irq3();
+    static void _irq4(); static void _irq5();
+    static void _irq6(); static void _irq7();
+#endif
+
+protected:
+    PinName _pin;
+#if defined(TARGET_LPC11U24)
+    Channel _channel;
+#endif
+    FunctionPointer _rise;
+    FunctionPointer _fall;
+
+    void setup_interrupt(int rising, int enable);
+    
+};
+
+} // namespace mbed
+
+#endif
+
+#endif