example micro:bit pedometer
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InterruptManager.h
- Committer:
- jamesadevine
- Date:
- 2016-04-07
- Revision:
- 0:e1a608bb55e8
File content as of revision 0:e1a608bb55e8:
#ifndef MBED_INTERRUPTMANAGER_H #define MBED_INTERRUPTMANAGER_H #include "cmsis.h" #include "CallChain.h" #include <string.h> namespace mbed { /** Use this singleton if you need to chain interrupt handlers. * * Example (for LPC1768): * @code * #include "InterruptManager.h" * #include "mbed.h" * * Ticker flipper; * DigitalOut led1(LED1); * DigitalOut led2(LED2); * * void flip(void) { * led1 = !led1; * } * * void handler(void) { * led2 = !led1; * } * * int main() { * led1 = led2 = 0; * flipper.attach(&flip, 1.0); * InterruptManager::get()->add_handler(handler, TIMER3_IRQn); * } * @endcode */ class InterruptManager { public: /** Return the only instance of this class */ static InterruptManager* get(); /** Destroy the current instance of the interrupt manager */ static void destroy(); /** Add a handler for an interrupt at the end of the handler list * * @param function the handler to add * @param irq interrupt number * * @returns * The function object created for 'function' */ pFunctionPointer_t add_handler(void (*function)(void), IRQn_Type irq) { return add_common(function, irq); } /** Add a handler for an interrupt at the beginning of the handler list * * @param function the handler to add * @param irq interrupt number * * @returns * The function object created for 'function' */ pFunctionPointer_t add_handler_front(void (*function)(void), IRQn_Type irq) { return add_common(function, irq, true); } /** Add a handler for an interrupt at the end of the handler list * * @param tptr pointer to the object that has the handler function * @param mptr pointer to the actual handler function * @param irq interrupt number * * @returns * The function object created for 'tptr' and 'mptr' */ template<typename T> pFunctionPointer_t add_handler(T* tptr, void (T::*mptr)(void), IRQn_Type irq) { return add_common(tptr, mptr, irq); } /** Add a handler for an interrupt at the beginning of the handler list * * @param tptr pointer to the object that has the handler function * @param mptr pointer to the actual handler function * @param irq interrupt number * * @returns * The function object created for 'tptr' and 'mptr' */ template<typename T> pFunctionPointer_t add_handler_front(T* tptr, void (T::*mptr)(void), IRQn_Type irq) { return add_common(tptr, mptr, irq, true); } /** Remove a handler from an interrupt * * @param handler the function object for the handler to remove * @param irq the interrupt number * * @returns * true if the handler was found and removed, false otherwise */ bool remove_handler(pFunctionPointer_t handler, IRQn_Type irq); private: InterruptManager(); ~InterruptManager(); // We declare the copy contructor and the assignment operator, but we don't // implement them. This way, if someone tries to copy/assign our instance, // he will get an error at compile time. InterruptManager(const InterruptManager&); InterruptManager& operator =(const InterruptManager&); template<typename T> pFunctionPointer_t add_common(T *tptr, void (T::*mptr)(void), IRQn_Type irq, bool front=false) { int irq_pos = get_irq_index(irq); bool change = must_replace_vector(irq); pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(tptr, mptr) : _chains[irq_pos]->add(tptr, mptr); if (change) NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper); return pf; } pFunctionPointer_t add_common(void (*function)(void), IRQn_Type irq, bool front=false); bool must_replace_vector(IRQn_Type irq); int get_irq_index(IRQn_Type irq); void irq_helper(); void add_helper(void (*function)(void), IRQn_Type irq, bool front=false); static void static_irq_helper(); CallChain* _chains[NVIC_NUM_VECTORS]; static InterruptManager* _instance; }; } // namespace mbed #endif