BA / Mbed OS BaBoRo_test2

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mbed-os/drivers/InterruptIn.cpp@0:02dd72d1d465, 2018-04-24 (annotated)

Committer:
borlanic
Date:
Tue Apr 24 11:45:18 2018 +0000
Revision:
0:02dd72d1d465
BaBoRo_test2 - backup 1

Who changed what in which revision?

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borlanic 0:02dd72d1d465 1 /* mbed Microcontroller Library
borlanic 0:02dd72d1d465 2 * Copyright (c) 2006-2013 ARM Limited
borlanic 0:02dd72d1d465 3 *
borlanic 0:02dd72d1d465 4 * Licensed under the Apache License, Version 2.0 (the "License");
borlanic 0:02dd72d1d465 5 * you may not use this file except in compliance with the License.
borlanic 0:02dd72d1d465 6 * You may obtain a copy of the License at
borlanic 0:02dd72d1d465 7 *
borlanic 0:02dd72d1d465 8 * http://www.apache.org/licenses/LICENSE-2.0
borlanic 0:02dd72d1d465 9 *
borlanic 0:02dd72d1d465 10 * Unless required by applicable law or agreed to in writing, software
borlanic 0:02dd72d1d465 11 * distributed under the License is distributed on an "AS IS" BASIS,
borlanic 0:02dd72d1d465 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
borlanic 0:02dd72d1d465 13 * See the License for the specific language governing permissions and
borlanic 0:02dd72d1d465 14 * limitations under the License.
borlanic 0:02dd72d1d465 15 */
borlanic 0:02dd72d1d465 16 #include "drivers/InterruptIn.h"
borlanic 0:02dd72d1d465 17
borlanic 0:02dd72d1d465 18 #if DEVICE_INTERRUPTIN
borlanic 0:02dd72d1d465 19
borlanic 0:02dd72d1d465 20 namespace mbed {
borlanic 0:02dd72d1d465 21
borlanic 0:02dd72d1d465 22 // Note: This single-parameter constructor exists to maintain binary
borlanic 0:02dd72d1d465 23 // compatibility.
borlanic 0:02dd72d1d465 24 // If not for that, we could simplify by having only the 2-param
borlanic 0:02dd72d1d465 25 // constructor, with a default value for the PinMode.
borlanic 0:02dd72d1d465 26 InterruptIn::InterruptIn(PinName pin) : gpio(),
borlanic 0:02dd72d1d465 27 gpio_irq(),
borlanic 0:02dd72d1d465 28 _rise(NULL),
borlanic 0:02dd72d1d465 29 _fall(NULL) {
borlanic 0:02dd72d1d465 30 // No lock needed in the constructor
borlanic 0:02dd72d1d465 31 irq_init(pin);
borlanic 0:02dd72d1d465 32 gpio_init_in(&gpio, pin);
borlanic 0:02dd72d1d465 33 }
borlanic 0:02dd72d1d465 34
borlanic 0:02dd72d1d465 35 InterruptIn::InterruptIn(PinName pin, PinMode mode) :
borlanic 0:02dd72d1d465 36 gpio(),
borlanic 0:02dd72d1d465 37 gpio_irq(),
borlanic 0:02dd72d1d465 38 _rise(NULL),
borlanic 0:02dd72d1d465 39 _fall(NULL) {
borlanic 0:02dd72d1d465 40 // No lock needed in the constructor
borlanic 0:02dd72d1d465 41 irq_init(pin);
borlanic 0:02dd72d1d465 42 gpio_init_in_ex(&gpio, pin, mode);
borlanic 0:02dd72d1d465 43 }
borlanic 0:02dd72d1d465 44
borlanic 0:02dd72d1d465 45 void InterruptIn::irq_init(PinName pin) {
borlanic 0:02dd72d1d465 46 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
borlanic 0:02dd72d1d465 47 }
borlanic 0:02dd72d1d465 48
borlanic 0:02dd72d1d465 49 InterruptIn::~InterruptIn() {
borlanic 0:02dd72d1d465 50 // No lock needed in the destructor
borlanic 0:02dd72d1d465 51 gpio_irq_free(&gpio_irq);
borlanic 0:02dd72d1d465 52 }
borlanic 0:02dd72d1d465 53
borlanic 0:02dd72d1d465 54 int InterruptIn::read() {
borlanic 0:02dd72d1d465 55 // Read only
borlanic 0:02dd72d1d465 56 return gpio_read(&gpio);
borlanic 0:02dd72d1d465 57 }
borlanic 0:02dd72d1d465 58
borlanic 0:02dd72d1d465 59 void InterruptIn::mode(PinMode pull) {
borlanic 0:02dd72d1d465 60 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 61 gpio_mode(&gpio, pull);
borlanic 0:02dd72d1d465 62 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 63 }
borlanic 0:02dd72d1d465 64
borlanic 0:02dd72d1d465 65 void InterruptIn::rise(Callback<void()> func) {
borlanic 0:02dd72d1d465 66 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 67 if (func) {
borlanic 0:02dd72d1d465 68 _rise = func;
borlanic 0:02dd72d1d465 69 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
borlanic 0:02dd72d1d465 70 } else {
borlanic 0:02dd72d1d465 71 _rise = NULL;
borlanic 0:02dd72d1d465 72 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
borlanic 0:02dd72d1d465 73 }
borlanic 0:02dd72d1d465 74 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 75 }
borlanic 0:02dd72d1d465 76
borlanic 0:02dd72d1d465 77 void InterruptIn::fall(Callback<void()> func) {
borlanic 0:02dd72d1d465 78 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 79 if (func) {
borlanic 0:02dd72d1d465 80 _fall = func;
borlanic 0:02dd72d1d465 81 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
borlanic 0:02dd72d1d465 82 } else {
borlanic 0:02dd72d1d465 83 _fall = NULL;
borlanic 0:02dd72d1d465 84 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
borlanic 0:02dd72d1d465 85 }
borlanic 0:02dd72d1d465 86 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 87 }
borlanic 0:02dd72d1d465 88
borlanic 0:02dd72d1d465 89 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
borlanic 0:02dd72d1d465 90 InterruptIn *handler = (InterruptIn*)id;
borlanic 0:02dd72d1d465 91 switch (event) {
borlanic 0:02dd72d1d465 92 case IRQ_RISE:
borlanic 0:02dd72d1d465 93 if (handler->_rise) {
borlanic 0:02dd72d1d465 94 handler->_rise();
borlanic 0:02dd72d1d465 95 }
borlanic 0:02dd72d1d465 96 break;
borlanic 0:02dd72d1d465 97 case IRQ_FALL:
borlanic 0:02dd72d1d465 98 if (handler->_fall) {
borlanic 0:02dd72d1d465 99 handler->_fall();
borlanic 0:02dd72d1d465 100 }
borlanic 0:02dd72d1d465 101 break;
borlanic 0:02dd72d1d465 102 case IRQ_NONE: break;
borlanic 0:02dd72d1d465 103 }
borlanic 0:02dd72d1d465 104 }
borlanic 0:02dd72d1d465 105
borlanic 0:02dd72d1d465 106 void InterruptIn::enable_irq() {
borlanic 0:02dd72d1d465 107 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 108 gpio_irq_enable(&gpio_irq);
borlanic 0:02dd72d1d465 109 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 110 }
borlanic 0:02dd72d1d465 111
borlanic 0:02dd72d1d465 112 void InterruptIn::disable_irq() {
borlanic 0:02dd72d1d465 113 core_util_critical_section_enter();
borlanic 0:02dd72d1d465 114 gpio_irq_disable(&gpio_irq);
borlanic 0:02dd72d1d465 115 core_util_critical_section_exit();
borlanic 0:02dd72d1d465 116 }
borlanic 0:02dd72d1d465 117
borlanic 0:02dd72d1d465 118 InterruptIn::operator int() {
borlanic 0:02dd72d1d465 119 // Underlying call is atomic
borlanic 0:02dd72d1d465 120 return read();
borlanic 0:02dd72d1d465 121 }
borlanic 0:02dd72d1d465 122
borlanic 0:02dd72d1d465 123 } // namespace mbed
borlanic 0:02dd72d1d465 124
borlanic 0:02dd72d1d465 125 #endif