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Diff: InterruptIn.h
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- 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