This fork captures the mbed lib v125 for ease of integration into older projects.
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InterruptManager.h
00001 #ifndef MBED_INTERRUPTMANAGER_H 00002 #define MBED_INTERRUPTMANAGER_H 00003 00004 #include "cmsis.h" 00005 #include "CallChain.h" 00006 #include "PlatformMutex.h" 00007 #include <string.h> 00008 00009 namespace mbed { 00010 00011 /** Use this singleton if you need to chain interrupt handlers. 00012 * 00013 * @Note Synchronization level: Thread safe 00014 * 00015 * Example (for LPC1768): 00016 * @code 00017 * #include "InterruptManager.h" 00018 * #include "mbed.h" 00019 * 00020 * Ticker flipper; 00021 * DigitalOut led1(LED1); 00022 * DigitalOut led2(LED2); 00023 * 00024 * void flip(void) { 00025 * led1 = !led1; 00026 * } 00027 * 00028 * void handler(void) { 00029 * led2 = !led1; 00030 * } 00031 * 00032 * int main() { 00033 * led1 = led2 = 0; 00034 * flipper.attach(&flip, 1.0); 00035 * InterruptManager::get()->add_handler(handler, TIMER3_IRQn); 00036 * } 00037 * @endcode 00038 */ 00039 class InterruptManager { 00040 public: 00041 /** Return the only instance of this class 00042 */ 00043 static InterruptManager* get(); 00044 00045 /** Destroy the current instance of the interrupt manager 00046 */ 00047 static void destroy(); 00048 00049 /** Add a handler for an interrupt at the end of the handler list 00050 * 00051 * @param function the handler to add 00052 * @param irq interrupt number 00053 * 00054 * @returns 00055 * The function object created for 'function' 00056 */ 00057 pFunctionPointer_t add_handler(void (*function)(void), IRQn_Type irq) { 00058 // Underlying call is thread safe 00059 return add_common(function, irq); 00060 } 00061 00062 /** Add a handler for an interrupt at the beginning of the handler list 00063 * 00064 * @param function the handler to add 00065 * @param irq interrupt number 00066 * 00067 * @returns 00068 * The function object created for 'function' 00069 */ 00070 pFunctionPointer_t add_handler_front(void (*function)(void), IRQn_Type irq) { 00071 // Underlying call is thread safe 00072 return add_common(function, irq, true); 00073 } 00074 00075 /** Add a handler for an interrupt at the end of the handler list 00076 * 00077 * @param tptr pointer to the object that has the handler function 00078 * @param mptr pointer to the actual handler function 00079 * @param irq interrupt number 00080 * 00081 * @returns 00082 * The function object created for 'tptr' and 'mptr' 00083 */ 00084 template<typename T> 00085 pFunctionPointer_t add_handler(T* tptr, void (T::*mptr)(void), IRQn_Type irq) { 00086 // Underlying call is thread safe 00087 return add_common(tptr, mptr, irq); 00088 } 00089 00090 /** Add a handler for an interrupt at the beginning of the handler list 00091 * 00092 * @param tptr pointer to the object that has the handler function 00093 * @param mptr pointer to the actual handler function 00094 * @param irq interrupt number 00095 * 00096 * @returns 00097 * The function object created for 'tptr' and 'mptr' 00098 */ 00099 template<typename T> 00100 pFunctionPointer_t add_handler_front(T* tptr, void (T::*mptr)(void), IRQn_Type irq) { 00101 // Underlying call is thread safe 00102 return add_common(tptr, mptr, irq, true); 00103 } 00104 00105 /** Remove a handler from an interrupt 00106 * 00107 * @param handler the function object for the handler to remove 00108 * @param irq the interrupt number 00109 * 00110 * @returns 00111 * true if the handler was found and removed, false otherwise 00112 */ 00113 bool remove_handler(pFunctionPointer_t handler, IRQn_Type irq); 00114 00115 private: 00116 InterruptManager(); 00117 ~InterruptManager(); 00118 00119 void lock(); 00120 void unlock(); 00121 00122 // We declare the copy contructor and the assignment operator, but we don't 00123 // implement them. This way, if someone tries to copy/assign our instance, 00124 // he will get an error at compile time. 00125 InterruptManager(const InterruptManager&); 00126 InterruptManager& operator =(const InterruptManager&); 00127 00128 template<typename T> 00129 pFunctionPointer_t add_common(T *tptr, void (T::*mptr)(void), IRQn_Type irq, bool front=false) { 00130 _mutex.lock(); 00131 int irq_pos = get_irq_index(irq); 00132 bool change = must_replace_vector(irq); 00133 00134 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(tptr, mptr) : _chains[irq_pos]->add(tptr, mptr); 00135 if (change) 00136 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper); 00137 _mutex.unlock(); 00138 return pf; 00139 } 00140 00141 pFunctionPointer_t add_common(void (*function)(void), IRQn_Type irq, bool front=false); 00142 bool must_replace_vector(IRQn_Type irq); 00143 int get_irq_index(IRQn_Type irq); 00144 void irq_helper(); 00145 void add_helper(void (*function)(void), IRQn_Type irq, bool front=false); 00146 static void static_irq_helper(); 00147 00148 CallChain* _chains[NVIC_NUM_VECTORS]; 00149 static InterruptManager* _instance; 00150 PlatformMutex _mutex; 00151 }; 00152 00153 } // namespace mbed 00154 00155 #endif 00156
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