Kev Mann / mbed-dev-OS5_10_4

RTC auf true

drivers/InterruptIn.cpp@2:7aab896b1a3b, 2019-03-13 (annotated)

Committer:
kevman
Date:
Wed Mar 13 11:03:24 2019 +0000
Revision:
2:7aab896b1a3b
Parent:
0:38ceb79fef03 
2019-03-13

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /* mbed Microcontroller Library
kevman 0:38ceb79fef03 2 * Copyright (c) 2006-2013 ARM Limited
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Licensed under the Apache License, Version 2.0 (the "License");
kevman 0:38ceb79fef03 5 * you may not use this file except in compliance with the License.
kevman 0:38ceb79fef03 6 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 7 *
kevman 0:38ceb79fef03 8 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 9 *
kevman 0:38ceb79fef03 10 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 11 * distributed under the License is distributed on an "AS IS" BASIS,
kevman 0:38ceb79fef03 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 13 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 14 * limitations under the License.
kevman 0:38ceb79fef03 15 */
kevman 0:38ceb79fef03 16 #include "drivers/InterruptIn.h"
kevman 0:38ceb79fef03 17
kevman 0:38ceb79fef03 18 #if DEVICE_INTERRUPTIN
kevman 0:38ceb79fef03 19
kevman 0:38ceb79fef03 20 namespace mbed {
kevman 0:38ceb79fef03 21
kevman 0:38ceb79fef03 22 // Note: This single-parameter constructor exists to maintain binary
kevman 0:38ceb79fef03 23 // compatibility.
kevman 0:38ceb79fef03 24 // If not for that, we could simplify by having only the 2-param
kevman 0:38ceb79fef03 25 // constructor, with a default value for the PinMode.
kevman 0:38ceb79fef03 26 InterruptIn::InterruptIn(PinName pin) : gpio(),
kevman 0:38ceb79fef03 27 gpio_irq(),
kevman 0:38ceb79fef03 28 _rise(NULL),
kevman 0:38ceb79fef03 29 _fall(NULL)
kevman 0:38ceb79fef03 30 {
kevman 0:38ceb79fef03 31 // No lock needed in the constructor
kevman 0:38ceb79fef03 32 irq_init(pin);
kevman 0:38ceb79fef03 33 gpio_init_in(&gpio, pin);
kevman 0:38ceb79fef03 34 }
kevman 0:38ceb79fef03 35
kevman 0:38ceb79fef03 36 InterruptIn::InterruptIn(PinName pin, PinMode mode) :
kevman 0:38ceb79fef03 37 gpio(),
kevman 0:38ceb79fef03 38 gpio_irq(),
kevman 0:38ceb79fef03 39 _rise(NULL),
kevman 0:38ceb79fef03 40 _fall(NULL)
kevman 0:38ceb79fef03 41 {
kevman 0:38ceb79fef03 42 // No lock needed in the constructor
kevman 0:38ceb79fef03 43 irq_init(pin);
kevman 0:38ceb79fef03 44 gpio_init_in_ex(&gpio, pin, mode);
kevman 0:38ceb79fef03 45 }
kevman 0:38ceb79fef03 46
kevman 0:38ceb79fef03 47 void InterruptIn::irq_init(PinName pin)
kevman 0:38ceb79fef03 48 {
kevman 0:38ceb79fef03 49 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
kevman 0:38ceb79fef03 50 }
kevman 0:38ceb79fef03 51
kevman 0:38ceb79fef03 52 InterruptIn::~InterruptIn()
kevman 0:38ceb79fef03 53 {
kevman 0:38ceb79fef03 54 // No lock needed in the destructor
kevman 0:38ceb79fef03 55 gpio_irq_free(&gpio_irq);
kevman 0:38ceb79fef03 56 }
kevman 0:38ceb79fef03 57
kevman 0:38ceb79fef03 58 int InterruptIn::read()
kevman 0:38ceb79fef03 59 {
kevman 0:38ceb79fef03 60 // Read only
kevman 0:38ceb79fef03 61 return gpio_read(&gpio);
kevman 0:38ceb79fef03 62 }
kevman 0:38ceb79fef03 63
kevman 0:38ceb79fef03 64 void InterruptIn::mode(PinMode pull)
kevman 0:38ceb79fef03 65 {
kevman 0:38ceb79fef03 66 core_util_critical_section_enter();
kevman 0:38ceb79fef03 67 gpio_mode(&gpio, pull);
kevman 0:38ceb79fef03 68 core_util_critical_section_exit();
kevman 0:38ceb79fef03 69 }
kevman 0:38ceb79fef03 70
kevman 0:38ceb79fef03 71 void InterruptIn::rise(Callback<void()> func)
kevman 0:38ceb79fef03 72 {
kevman 0:38ceb79fef03 73 core_util_critical_section_enter();
kevman 0:38ceb79fef03 74 if (func) {
kevman 0:38ceb79fef03 75 _rise = func;
kevman 0:38ceb79fef03 76 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
kevman 0:38ceb79fef03 77 } else {
kevman 0:38ceb79fef03 78 _rise = NULL;
kevman 0:38ceb79fef03 79 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
kevman 0:38ceb79fef03 80 }
kevman 0:38ceb79fef03 81 core_util_critical_section_exit();
kevman 0:38ceb79fef03 82 }
kevman 0:38ceb79fef03 83
kevman 0:38ceb79fef03 84 void InterruptIn::fall(Callback<void()> func)
kevman 0:38ceb79fef03 85 {
kevman 0:38ceb79fef03 86 core_util_critical_section_enter();
kevman 0:38ceb79fef03 87 if (func) {
kevman 0:38ceb79fef03 88 _fall = func;
kevman 0:38ceb79fef03 89 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
kevman 0:38ceb79fef03 90 } else {
kevman 0:38ceb79fef03 91 _fall = NULL;
kevman 0:38ceb79fef03 92 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
kevman 0:38ceb79fef03 93 }
kevman 0:38ceb79fef03 94 core_util_critical_section_exit();
kevman 0:38ceb79fef03 95 }
kevman 0:38ceb79fef03 96
kevman 0:38ceb79fef03 97 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event)
kevman 0:38ceb79fef03 98 {
kevman 0:38ceb79fef03 99 InterruptIn *handler = (InterruptIn *)id;
kevman 0:38ceb79fef03 100 switch (event) {
kevman 0:38ceb79fef03 101 case IRQ_RISE:
kevman 0:38ceb79fef03 102 if (handler->_rise) {
kevman 0:38ceb79fef03 103 handler->_rise();
kevman 0:38ceb79fef03 104 }
kevman 0:38ceb79fef03 105 break;
kevman 0:38ceb79fef03 106 case IRQ_FALL:
kevman 0:38ceb79fef03 107 if (handler->_fall) {
kevman 0:38ceb79fef03 108 handler->_fall();
kevman 0:38ceb79fef03 109 }
kevman 0:38ceb79fef03 110 break;
kevman 0:38ceb79fef03 111 case IRQ_NONE:
kevman 0:38ceb79fef03 112 break;
kevman 0:38ceb79fef03 113 }
kevman 0:38ceb79fef03 114 }
kevman 0:38ceb79fef03 115
kevman 0:38ceb79fef03 116 void InterruptIn::enable_irq()
kevman 0:38ceb79fef03 117 {
kevman 0:38ceb79fef03 118 core_util_critical_section_enter();
kevman 0:38ceb79fef03 119 gpio_irq_enable(&gpio_irq);
kevman 0:38ceb79fef03 120 core_util_critical_section_exit();
kevman 0:38ceb79fef03 121 }
kevman 0:38ceb79fef03 122
kevman 0:38ceb79fef03 123 void InterruptIn::disable_irq()
kevman 0:38ceb79fef03 124 {
kevman 0:38ceb79fef03 125 core_util_critical_section_enter();
kevman 0:38ceb79fef03 126 gpio_irq_disable(&gpio_irq);
kevman 0:38ceb79fef03 127 core_util_critical_section_exit();
kevman 0:38ceb79fef03 128 }
kevman 0:38ceb79fef03 129
kevman 0:38ceb79fef03 130 InterruptIn::operator int()
kevman 0:38ceb79fef03 131 {
kevman 0:38ceb79fef03 132 // Underlying call is atomic
kevman 0:38ceb79fef03 133 return read();
kevman 0:38ceb79fef03 134 }
kevman 0:38ceb79fef03 135
kevman 0:38ceb79fef03 136 } // namespace mbed
kevman 0:38ceb79fef03 137
kevman 0:38ceb79fef03 138 #endif