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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

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mbed 2

This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.

drivers/InterruptIn.h@145:64910690c574, 2017-06-21 (annotated)

Committer:
AnnaBridge
Date:
Wed Jun 21 17:31:38 2017 +0100
Revision:
145:64910690c574
Parent:
138:093f2bd7b9eb
Child:
146:22da6e220af6
Release 145 of the mbed library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 128:9bcdf88f62b0 1 /* mbed Microcontroller Library
<> 128:9bcdf88f62b0 2 * Copyright (c) 2006-2013 ARM Limited
<> 128:9bcdf88f62b0 3 *
<> 128:9bcdf88f62b0 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 128:9bcdf88f62b0 5 * you may not use this file except in compliance with the License.
<> 128:9bcdf88f62b0 6 * You may obtain a copy of the License at
<> 128:9bcdf88f62b0 7 *
<> 128:9bcdf88f62b0 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 128:9bcdf88f62b0 9 *
<> 128:9bcdf88f62b0 10 * Unless required by applicable law or agreed to in writing, software
<> 128:9bcdf88f62b0 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 128:9bcdf88f62b0 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 128:9bcdf88f62b0 13 * See the License for the specific language governing permissions and
<> 128:9bcdf88f62b0 14 * limitations under the License.
<> 128:9bcdf88f62b0 15 */
<> 128:9bcdf88f62b0 16 #ifndef MBED_INTERRUPTIN_H
<> 128:9bcdf88f62b0 17 #define MBED_INTERRUPTIN_H
<> 128:9bcdf88f62b0 18
<> 128:9bcdf88f62b0 19 #include "platform/platform.h"
<> 128:9bcdf88f62b0 20
AnnaBridge 145:64910690c574 21 #if defined (DEVICE_INTERRUPTIN) || defined(DOXYGEN_ONLY)
<> 128:9bcdf88f62b0 22
<> 128:9bcdf88f62b0 23 #include "hal/gpio_api.h"
<> 128:9bcdf88f62b0 24 #include "hal/gpio_irq_api.h"
<> 128:9bcdf88f62b0 25 #include "platform/Callback.h"
<> 138:093f2bd7b9eb 26 #include "platform/mbed_critical.h"
<> 138:093f2bd7b9eb 27 #include "platform/mbed_toolchain.h"
<> 128:9bcdf88f62b0 28
<> 128:9bcdf88f62b0 29 namespace mbed {
<> 128:9bcdf88f62b0 30 /** \addtogroup drivers */
<> 128:9bcdf88f62b0 31
<> 128:9bcdf88f62b0 32 /** A digital interrupt input, used to call a function on a rising or falling edge
<> 128:9bcdf88f62b0 33 *
AnnaBridge 145:64910690c574 34 * @note Synchronization level: Interrupt safe
<> 128:9bcdf88f62b0 35 *
<> 128:9bcdf88f62b0 36 * Example:
<> 128:9bcdf88f62b0 37 * @code
<> 128:9bcdf88f62b0 38 * // Flash an LED while waiting for events
<> 128:9bcdf88f62b0 39 *
<> 128:9bcdf88f62b0 40 * #include "mbed.h"
<> 128:9bcdf88f62b0 41 *
<> 128:9bcdf88f62b0 42 * InterruptIn event(p16);
<> 128:9bcdf88f62b0 43 * DigitalOut led(LED1);
<> 128:9bcdf88f62b0 44 *
<> 128:9bcdf88f62b0 45 * void trigger() {
<> 128:9bcdf88f62b0 46 * printf("triggered!\n");
<> 128:9bcdf88f62b0 47 * }
<> 128:9bcdf88f62b0 48 *
<> 128:9bcdf88f62b0 49 * int main() {
<> 128:9bcdf88f62b0 50 * event.rise(&trigger);
<> 128:9bcdf88f62b0 51 * while(1) {
<> 128:9bcdf88f62b0 52 * led = !led;
<> 128:9bcdf88f62b0 53 * wait(0.25);
<> 128:9bcdf88f62b0 54 * }
<> 128:9bcdf88f62b0 55 * }
<> 128:9bcdf88f62b0 56 * @endcode
AnnaBridge 145:64910690c574 57 * @ingroup drivers
<> 128:9bcdf88f62b0 58 */
<> 128:9bcdf88f62b0 59 class InterruptIn {
<> 128:9bcdf88f62b0 60
<> 128:9bcdf88f62b0 61 public:
<> 128:9bcdf88f62b0 62
<> 128:9bcdf88f62b0 63 /** Create an InterruptIn connected to the specified pin
<> 128:9bcdf88f62b0 64 *
<> 128:9bcdf88f62b0 65 * @param pin InterruptIn pin to connect to
<> 128:9bcdf88f62b0 66 */
<> 128:9bcdf88f62b0 67 InterruptIn(PinName pin);
<> 128:9bcdf88f62b0 68 virtual ~InterruptIn();
<> 128:9bcdf88f62b0 69
<> 128:9bcdf88f62b0 70 /** Read the input, represented as 0 or 1 (int)
<> 128:9bcdf88f62b0 71 *
<> 128:9bcdf88f62b0 72 * @returns
<> 128:9bcdf88f62b0 73 * An integer representing the state of the input pin,
<> 128:9bcdf88f62b0 74 * 0 for logical 0, 1 for logical 1
<> 128:9bcdf88f62b0 75 */
<> 128:9bcdf88f62b0 76 int read();
<> 128:9bcdf88f62b0 77
<> 128:9bcdf88f62b0 78 /** An operator shorthand for read()
<> 128:9bcdf88f62b0 79 */
<> 128:9bcdf88f62b0 80 operator int();
<> 128:9bcdf88f62b0 81
<> 128:9bcdf88f62b0 82
<> 128:9bcdf88f62b0 83 /** Attach a function to call when a rising edge occurs on the input
<> 128:9bcdf88f62b0 84 *
<> 128:9bcdf88f62b0 85 * @param func A pointer to a void function, or 0 to set as none
<> 128:9bcdf88f62b0 86 */
<> 128:9bcdf88f62b0 87 void rise(Callback<void()> func);
<> 128:9bcdf88f62b0 88
<> 128:9bcdf88f62b0 89 /** Attach a member function to call when a rising edge occurs on the input
<> 128:9bcdf88f62b0 90 *
<> 128:9bcdf88f62b0 91 * @param obj pointer to the object to call the member function on
<> 128:9bcdf88f62b0 92 * @param method pointer to the member function to be called
<> 128:9bcdf88f62b0 93 * @deprecated
<> 128:9bcdf88f62b0 94 * The rise function does not support cv-qualifiers. Replaced by
<> 128:9bcdf88f62b0 95 * rise(callback(obj, method)).
<> 128:9bcdf88f62b0 96 */
<> 128:9bcdf88f62b0 97 template<typename T, typename M>
<> 128:9bcdf88f62b0 98 MBED_DEPRECATED_SINCE("mbed-os-5.1",
<> 128:9bcdf88f62b0 99 "The rise function does not support cv-qualifiers. Replaced by "
<> 128:9bcdf88f62b0 100 "rise(callback(obj, method)).")
<> 128:9bcdf88f62b0 101 void rise(T *obj, M method) {
<> 128:9bcdf88f62b0 102 core_util_critical_section_enter();
<> 128:9bcdf88f62b0 103 rise(callback(obj, method));
<> 128:9bcdf88f62b0 104 core_util_critical_section_exit();
<> 128:9bcdf88f62b0 105 }
<> 128:9bcdf88f62b0 106
<> 128:9bcdf88f62b0 107 /** Attach a function to call when a falling edge occurs on the input
<> 128:9bcdf88f62b0 108 *
<> 128:9bcdf88f62b0 109 * @param func A pointer to a void function, or 0 to set as none
<> 128:9bcdf88f62b0 110 */
<> 128:9bcdf88f62b0 111 void fall(Callback<void()> func);
<> 128:9bcdf88f62b0 112
<> 128:9bcdf88f62b0 113 /** Attach a member function to call when a falling edge occurs on the input
<> 128:9bcdf88f62b0 114 *
<> 128:9bcdf88f62b0 115 * @param obj pointer to the object to call the member function on
<> 128:9bcdf88f62b0 116 * @param method pointer to the member function to be called
<> 128:9bcdf88f62b0 117 * @deprecated
<> 128:9bcdf88f62b0 118 * The rise function does not support cv-qualifiers. Replaced by
<> 128:9bcdf88f62b0 119 * rise(callback(obj, method)).
<> 128:9bcdf88f62b0 120 */
<> 128:9bcdf88f62b0 121 template<typename T, typename M>
<> 128:9bcdf88f62b0 122 MBED_DEPRECATED_SINCE("mbed-os-5.1",
<> 128:9bcdf88f62b0 123 "The fall function does not support cv-qualifiers. Replaced by "
<> 128:9bcdf88f62b0 124 "fall(callback(obj, method)).")
<> 128:9bcdf88f62b0 125 void fall(T *obj, M method) {
<> 128:9bcdf88f62b0 126 core_util_critical_section_enter();
<> 128:9bcdf88f62b0 127 fall(callback(obj, method));
<> 128:9bcdf88f62b0 128 core_util_critical_section_exit();
<> 128:9bcdf88f62b0 129 }
<> 128:9bcdf88f62b0 130
<> 128:9bcdf88f62b0 131 /** Set the input pin mode
<> 128:9bcdf88f62b0 132 *
AnnaBridge 145:64910690c574 133 * @param pull PullUp, PullDown, PullNone
<> 128:9bcdf88f62b0 134 */
<> 128:9bcdf88f62b0 135 void mode(PinMode pull);
<> 128:9bcdf88f62b0 136
<> 128:9bcdf88f62b0 137 /** Enable IRQ. This method depends on hw implementation, might enable one
<> 128:9bcdf88f62b0 138 * port interrupts. For further information, check gpio_irq_enable().
<> 128:9bcdf88f62b0 139 */
<> 128:9bcdf88f62b0 140 void enable_irq();
<> 128:9bcdf88f62b0 141
<> 128:9bcdf88f62b0 142 /** Disable IRQ. This method depends on hw implementation, might disable one
<> 128:9bcdf88f62b0 143 * port interrupts. For further information, check gpio_irq_disable().
<> 128:9bcdf88f62b0 144 */
<> 128:9bcdf88f62b0 145 void disable_irq();
<> 128:9bcdf88f62b0 146
<> 128:9bcdf88f62b0 147 static void _irq_handler(uint32_t id, gpio_irq_event event);
<> 128:9bcdf88f62b0 148
<> 128:9bcdf88f62b0 149 protected:
<> 128:9bcdf88f62b0 150 gpio_t gpio;
<> 128:9bcdf88f62b0 151 gpio_irq_t gpio_irq;
<> 128:9bcdf88f62b0 152
<> 128:9bcdf88f62b0 153 Callback<void()> _rise;
<> 128:9bcdf88f62b0 154 Callback<void()> _fall;
<> 128:9bcdf88f62b0 155 };
<> 128:9bcdf88f62b0 156
<> 128:9bcdf88f62b0 157 } // namespace mbed
<> 128:9bcdf88f62b0 158
<> 128:9bcdf88f62b0 159 #endif
<> 128:9bcdf88f62b0 160
<> 128:9bcdf88f62b0 161 #endif