diff options
Diffstat (limited to 'ext/InterruptManager.h')
| -rw-r--r-- | ext/InterruptManager.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/ext/InterruptManager.h b/ext/InterruptManager.h new file mode 100644 index 0000000..b9c3b9f --- /dev/null +++ b/ext/InterruptManager.h @@ -0,0 +1,143 @@ +#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
+
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