Mateusz Kowalik / Application_danix

,,

Fork of Application by Daniel Sygut

mbed-dev/drivers/InterruptIn.cpp@15:2a20c3d2616e, 2018-02-15 (annotated)

Committer:
Zaitsev
Date:
Thu Feb 15 14:29:23 2018 +0000
Revision:
15:2a20c3d2616e
Parent:
10:41552d038a69 
j

Who changed what in which revision?

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Zaitsev 10:41552d038a69 1 /* mbed Microcontroller Library
Zaitsev 10:41552d038a69 2 * Copyright (c) 2006-2013 ARM Limited
Zaitsev 10:41552d038a69 3 *
Zaitsev 10:41552d038a69 4 * Licensed under the Apache License, Version 2.0 (the "License");
Zaitsev 10:41552d038a69 5 * you may not use this file except in compliance with the License.
Zaitsev 10:41552d038a69 6 * You may obtain a copy of the License at
Zaitsev 10:41552d038a69 7 *
Zaitsev 10:41552d038a69 8 * http://www.apache.org/licenses/LICENSE-2.0
Zaitsev 10:41552d038a69 9 *
Zaitsev 10:41552d038a69 10 * Unless required by applicable law or agreed to in writing, software
Zaitsev 10:41552d038a69 11 * distributed under the License is distributed on an "AS IS" BASIS,
Zaitsev 10:41552d038a69 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Zaitsev 10:41552d038a69 13 * See the License for the specific language governing permissions and
Zaitsev 10:41552d038a69 14 * limitations under the License.
Zaitsev 10:41552d038a69 15 */
Zaitsev 10:41552d038a69 16 #include "drivers/InterruptIn.h"
Zaitsev 10:41552d038a69 17
Zaitsev 10:41552d038a69 18 #if DEVICE_INTERRUPTIN
Zaitsev 10:41552d038a69 19
Zaitsev 10:41552d038a69 20 namespace mbed {
Zaitsev 10:41552d038a69 21
Zaitsev 10:41552d038a69 22 static void donothing() {}
Zaitsev 10:41552d038a69 23
Zaitsev 10:41552d038a69 24 InterruptIn::InterruptIn(PinName pin) : gpio(),
Zaitsev 10:41552d038a69 25 gpio_irq(),
Zaitsev 10:41552d038a69 26 _rise(),
Zaitsev 10:41552d038a69 27 _fall() {
Zaitsev 10:41552d038a69 28 // No lock needed in the constructor
Zaitsev 10:41552d038a69 29
Zaitsev 10:41552d038a69 30 _rise.attach(donothing);
Zaitsev 10:41552d038a69 31 _fall.attach(donothing);
Zaitsev 10:41552d038a69 32
Zaitsev 10:41552d038a69 33 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
Zaitsev 10:41552d038a69 34 gpio_init_in(&gpio, pin);
Zaitsev 10:41552d038a69 35 }
Zaitsev 10:41552d038a69 36
Zaitsev 10:41552d038a69 37 InterruptIn::~InterruptIn() {
Zaitsev 10:41552d038a69 38 // No lock needed in the destructor
Zaitsev 10:41552d038a69 39 gpio_irq_free(&gpio_irq);
Zaitsev 10:41552d038a69 40 }
Zaitsev 10:41552d038a69 41
Zaitsev 10:41552d038a69 42 int InterruptIn::read() {
Zaitsev 10:41552d038a69 43 // Read only
Zaitsev 10:41552d038a69 44 return gpio_read(&gpio);
Zaitsev 10:41552d038a69 45 }
Zaitsev 10:41552d038a69 46
Zaitsev 10:41552d038a69 47 void InterruptIn::mode(PinMode pull) {
Zaitsev 10:41552d038a69 48 core_util_critical_section_enter();
Zaitsev 10:41552d038a69 49 gpio_mode(&gpio, pull);
Zaitsev 10:41552d038a69 50 core_util_critical_section_exit();
Zaitsev 10:41552d038a69 51 }
Zaitsev 10:41552d038a69 52
Zaitsev 10:41552d038a69 53 void InterruptIn::rise(Callback<void()> func) {
Zaitsev 10:41552d038a69 54 core_util_critical_section_enter();
Zaitsev 10:41552d038a69 55 if (func) {
Zaitsev 10:41552d038a69 56 _rise.attach(func);
Zaitsev 10:41552d038a69 57 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
Zaitsev 10:41552d038a69 58 } else {
Zaitsev 10:41552d038a69 59 _rise.attach(donothing);
Zaitsev 10:41552d038a69 60 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
Zaitsev 10:41552d038a69 61 }
Zaitsev 10:41552d038a69 62 core_util_critical_section_exit();
Zaitsev 10:41552d038a69 63 }
Zaitsev 10:41552d038a69 64
Zaitsev 10:41552d038a69 65 void InterruptIn::fall(Callback<void()> func) {
Zaitsev 10:41552d038a69 66 core_util_critical_section_enter();
Zaitsev 10:41552d038a69 67 if (func) {
Zaitsev 10:41552d038a69 68 _fall.attach(func);
Zaitsev 10:41552d038a69 69 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
Zaitsev 10:41552d038a69 70 } else {
Zaitsev 10:41552d038a69 71 _fall.attach(donothing);
Zaitsev 10:41552d038a69 72 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
Zaitsev 10:41552d038a69 73 }
Zaitsev 10:41552d038a69 74 core_util_critical_section_exit();
Zaitsev 10:41552d038a69 75 }
Zaitsev 10:41552d038a69 76
Zaitsev 10:41552d038a69 77 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
Zaitsev 10:41552d038a69 78 InterruptIn *handler = (InterruptIn*)id;
Zaitsev 10:41552d038a69 79 switch (event) {
Zaitsev 10:41552d038a69 80 case IRQ_RISE: handler->_rise.call(); break;
Zaitsev 10:41552d038a69 81 case IRQ_FALL: handler->_fall.call(); break;
Zaitsev 10:41552d038a69 82 case IRQ_NONE: break;
Zaitsev 10:41552d038a69 83 }
Zaitsev 10:41552d038a69 84 }
Zaitsev 10:41552d038a69 85
Zaitsev 10:41552d038a69 86 void InterruptIn::enable_irq() {
Zaitsev 10:41552d038a69 87 core_util_critical_section_enter();
Zaitsev 10:41552d038a69 88 gpio_irq_enable(&gpio_irq);
Zaitsev 10:41552d038a69 89 core_util_critical_section_exit();
Zaitsev 10:41552d038a69 90 }
Zaitsev 10:41552d038a69 91
Zaitsev 10:41552d038a69 92 void InterruptIn::disable_irq() {
Zaitsev 10:41552d038a69 93 core_util_critical_section_enter();
Zaitsev 10:41552d038a69 94 gpio_irq_disable(&gpio_irq);
Zaitsev 10:41552d038a69 95 core_util_critical_section_exit();
Zaitsev 10:41552d038a69 96 }
Zaitsev 10:41552d038a69 97
Zaitsev 10:41552d038a69 98 InterruptIn::operator int() {
Zaitsev 10:41552d038a69 99 // Underlying call is atomic
Zaitsev 10:41552d038a69 100 return read();
Zaitsev 10:41552d038a69 101 }
Zaitsev 10:41552d038a69 102
Zaitsev 10:41552d038a69 103 } // namespace mbed
Zaitsev 10:41552d038a69 104
Zaitsev 10:41552d038a69 105 #endif