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api/InterruptIn.h
- Committer:
- bogdanm
- Date:
- 2013-08-05
- Revision:
- 13:0645d8841f51
- Parent:
- 10:3bc89ef62ce7
- Child:
- 15:4892fe388435
File content as of revision 13:0645d8841f51:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef MBED_INTERRUPTIN_H #define MBED_INTERRUPTIN_H #include "platform.h" #if DEVICE_INTERRUPTIN #include "gpio_api.h" #include "gpio_irq_api.h" #include "FunctionPointer.h" namespace mbed { /** A digital interrupt input, used to call a function on a rising or falling edge * * Example: * @code * // 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); * } * } * @endcode */ class InterruptIn { public: /** Create an InterruptIn connected to the specified pin * * @param pin InterruptIn pin to connect to * @param name (optional) A string to identify the object */ InterruptIn(PinName pin); virtual ~InterruptIn(); int read(); #ifdef MBED_OPERATORS operator int(); #endif /** Attach a function to call when a rising edge occurs on the input * * @param fptr A pointer to a void function, or 0 to set as none */ void rise(void (*fptr)(void)); /** Attach a member function to call when a rising edge occurs on the input * * @param tptr pointer to the object to call the member function on * @param mptr pointer to the member function to be called */ template<typename T> void rise(T* tptr, void (T::*mptr)(void)) { _rise.attach(tptr, mptr); gpio_irq_set(&gpio_irq, IRQ_RISE, 1); } /** Attach a function to call when a falling edge occurs on the input * * @param fptr A pointer to a void function, or 0 to set as none */ void fall(void (*fptr)(void)); /** Attach a member function to call when a falling edge occurs on the input * * @param tptr pointer to the object to call the member function on * @param mptr pointer to the member function to be called */ template<typename T> void fall(T* tptr, void (T::*mptr)(void)) { _fall.attach(tptr, mptr); gpio_irq_set(&gpio_irq, IRQ_FALL, 1); } /** Set the input pin mode * * @param mode PullUp, PullDown, PullNone */ void mode(PinMode pull); static void _irq_handler(uint32_t id, gpio_irq_event event); protected: gpio_t gpio; gpio_irq_t gpio_irq; FunctionPointer _rise; FunctionPointer _fall; }; } // namespace mbed #endif #endif