mirror of https://github.com/ARMmbed/mbed-os.git
136 lines
3.4 KiB
C++
136 lines
3.4 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MBED_INTERRUPTIN_H
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#define MBED_INTERRUPTIN_H
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#include "platform.h"
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#if DEVICE_INTERRUPTIN
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#include "gpio_api.h"
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#include "gpio_irq_api.h"
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#include "FunctionPointer.h"
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namespace mbed {
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/** A digital interrupt input, used to call a function on a rising or falling edge
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*
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* Example:
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* @code
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* // Flash an LED while waiting for events
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*
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* #include "mbed.h"
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*
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* InterruptIn event(p16);
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* DigitalOut led(LED1);
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*
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* void trigger() {
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* printf("triggered!\n");
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* }
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*
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* int main() {
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* event.rise(&trigger);
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* while(1) {
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* led = !led;
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* wait(0.25);
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* }
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* }
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* @endcode
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*/
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class InterruptIn {
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public:
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/** Create an InterruptIn connected to the specified pin
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*
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* @param pin InterruptIn pin to connect to
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* @param name (optional) A string to identify the object
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*/
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InterruptIn(PinName pin);
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virtual ~InterruptIn();
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int read();
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#ifdef MBED_OPERATORS
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operator int();
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#endif
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/** Attach a function to call when a rising edge occurs on the input
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*
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* @param fptr A pointer to a void function, or 0 to set as none
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*/
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void rise(void (*fptr)(void));
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/** Attach a member function to call when a rising edge occurs on the input
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*
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* @param tptr pointer to the object to call the member function on
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* @param mptr pointer to the member function to be called
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*/
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template<typename T>
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void rise(T* tptr, void (T::*mptr)(void)) {
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_rise.attach(tptr, mptr);
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gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
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}
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/** Attach a function to call when a falling edge occurs on the input
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*
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* @param fptr A pointer to a void function, or 0 to set as none
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*/
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void fall(void (*fptr)(void));
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/** Attach a member function to call when a falling edge occurs on the input
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*
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* @param tptr pointer to the object to call the member function on
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* @param mptr pointer to the member function to be called
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*/
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template<typename T>
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void fall(T* tptr, void (T::*mptr)(void)) {
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_fall.attach(tptr, mptr);
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gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
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}
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/** Set the input pin mode
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*
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* @param mode PullUp, PullDown, PullNone
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*/
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void mode(PinMode pull);
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/** Enable IRQ. This method depends on hw implementation, might enable one
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* port interrupts. For further information, check gpio_irq_enable().
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*/
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void enable_irq();
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/** Disable IRQ. This method depends on hw implementation, might disable one
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* port interrupts. For further information, check gpio_irq_disable().
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*/
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void disable_irq();
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static void _irq_handler(uint32_t id, gpio_irq_event event);
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protected:
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gpio_t gpio;
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gpio_irq_t gpio_irq;
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FunctionPointer _rise;
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FunctionPointer _fall;
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};
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} // namespace mbed
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#endif
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#endif
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