Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/drivers/InterruptIn.cpp@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 * Copyright (c) 2006-2013 ARM Limited
lypinator 0:bb348c97df44 3 *
lypinator 0:bb348c97df44 4 * Licensed under the Apache License, Version 2.0 (the "License");
lypinator 0:bb348c97df44 5 * you may not use this file except in compliance with the License.
lypinator 0:bb348c97df44 6 * You may obtain a copy of the License at
lypinator 0:bb348c97df44 7 *
lypinator 0:bb348c97df44 8 * http://www.apache.org/licenses/LICENSE-2.0
lypinator 0:bb348c97df44 9 *
lypinator 0:bb348c97df44 10 * Unless required by applicable law or agreed to in writing, software
lypinator 0:bb348c97df44 11 * distributed under the License is distributed on an "AS IS" BASIS,
lypinator 0:bb348c97df44 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
lypinator 0:bb348c97df44 13 * See the License for the specific language governing permissions and
lypinator 0:bb348c97df44 14 * limitations under the License.
lypinator 0:bb348c97df44 15 */
lypinator 0:bb348c97df44 16 #include "drivers/InterruptIn.h"
lypinator 0:bb348c97df44 17
lypinator 0:bb348c97df44 18 #if DEVICE_INTERRUPTIN
lypinator 0:bb348c97df44 19
lypinator 0:bb348c97df44 20 namespace mbed {
lypinator 0:bb348c97df44 21
lypinator 0:bb348c97df44 22 // Note: This single-parameter constructor exists to maintain binary
lypinator 0:bb348c97df44 23 // compatibility.
lypinator 0:bb348c97df44 24 // If not for that, we could simplify by having only the 2-param
lypinator 0:bb348c97df44 25 // constructor, with a default value for the PinMode.
lypinator 0:bb348c97df44 26 InterruptIn::InterruptIn(PinName pin) : gpio(),
lypinator 0:bb348c97df44 27 gpio_irq(),
lypinator 0:bb348c97df44 28 _rise(NULL),
lypinator 0:bb348c97df44 29 _fall(NULL)
lypinator 0:bb348c97df44 30 {
lypinator 0:bb348c97df44 31 // No lock needed in the constructor
lypinator 0:bb348c97df44 32 irq_init(pin);
lypinator 0:bb348c97df44 33 gpio_init_in(&gpio, pin);
lypinator 0:bb348c97df44 34 }
lypinator 0:bb348c97df44 35
lypinator 0:bb348c97df44 36 InterruptIn::InterruptIn(PinName pin, PinMode mode) :
lypinator 0:bb348c97df44 37 gpio(),
lypinator 0:bb348c97df44 38 gpio_irq(),
lypinator 0:bb348c97df44 39 _rise(NULL),
lypinator 0:bb348c97df44 40 _fall(NULL)
lypinator 0:bb348c97df44 41 {
lypinator 0:bb348c97df44 42 // No lock needed in the constructor
lypinator 0:bb348c97df44 43 irq_init(pin);
lypinator 0:bb348c97df44 44 gpio_init_in_ex(&gpio, pin, mode);
lypinator 0:bb348c97df44 45 }
lypinator 0:bb348c97df44 46
lypinator 0:bb348c97df44 47 void InterruptIn::irq_init(PinName pin)
lypinator 0:bb348c97df44 48 {
lypinator 0:bb348c97df44 49 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
lypinator 0:bb348c97df44 50 }
lypinator 0:bb348c97df44 51
lypinator 0:bb348c97df44 52 InterruptIn::~InterruptIn()
lypinator 0:bb348c97df44 53 {
lypinator 0:bb348c97df44 54 // No lock needed in the destructor
lypinator 0:bb348c97df44 55 gpio_irq_free(&gpio_irq);
lypinator 0:bb348c97df44 56 }
lypinator 0:bb348c97df44 57
lypinator 0:bb348c97df44 58 int InterruptIn::read()
lypinator 0:bb348c97df44 59 {
lypinator 0:bb348c97df44 60 // Read only
lypinator 0:bb348c97df44 61 return gpio_read(&gpio);
lypinator 0:bb348c97df44 62 }
lypinator 0:bb348c97df44 63
lypinator 0:bb348c97df44 64 void InterruptIn::mode(PinMode pull)
lypinator 0:bb348c97df44 65 {
lypinator 0:bb348c97df44 66 core_util_critical_section_enter();
lypinator 0:bb348c97df44 67 gpio_mode(&gpio, pull);
lypinator 0:bb348c97df44 68 core_util_critical_section_exit();
lypinator 0:bb348c97df44 69 }
lypinator 0:bb348c97df44 70
lypinator 0:bb348c97df44 71 void InterruptIn::rise(Callback<void()> func)
lypinator 0:bb348c97df44 72 {
lypinator 0:bb348c97df44 73 core_util_critical_section_enter();
lypinator 0:bb348c97df44 74 if (func) {
lypinator 0:bb348c97df44 75 _rise = func;
lypinator 0:bb348c97df44 76 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
lypinator 0:bb348c97df44 77 } else {
lypinator 0:bb348c97df44 78 _rise = NULL;
lypinator 0:bb348c97df44 79 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
lypinator 0:bb348c97df44 80 }
lypinator 0:bb348c97df44 81 core_util_critical_section_exit();
lypinator 0:bb348c97df44 82 }
lypinator 0:bb348c97df44 83
lypinator 0:bb348c97df44 84 void InterruptIn::fall(Callback<void()> func)
lypinator 0:bb348c97df44 85 {
lypinator 0:bb348c97df44 86 core_util_critical_section_enter();
lypinator 0:bb348c97df44 87 if (func) {
lypinator 0:bb348c97df44 88 _fall = func;
lypinator 0:bb348c97df44 89 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
lypinator 0:bb348c97df44 90 } else {
lypinator 0:bb348c97df44 91 _fall = NULL;
lypinator 0:bb348c97df44 92 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
lypinator 0:bb348c97df44 93 }
lypinator 0:bb348c97df44 94 core_util_critical_section_exit();
lypinator 0:bb348c97df44 95 }
lypinator 0:bb348c97df44 96
lypinator 0:bb348c97df44 97 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event)
lypinator 0:bb348c97df44 98 {
lypinator 0:bb348c97df44 99 InterruptIn *handler = (InterruptIn *)id;
lypinator 0:bb348c97df44 100 switch (event) {
lypinator 0:bb348c97df44 101 case IRQ_RISE:
lypinator 0:bb348c97df44 102 if (handler->_rise) {
lypinator 0:bb348c97df44 103 handler->_rise();
lypinator 0:bb348c97df44 104 }
lypinator 0:bb348c97df44 105 break;
lypinator 0:bb348c97df44 106 case IRQ_FALL:
lypinator 0:bb348c97df44 107 if (handler->_fall) {
lypinator 0:bb348c97df44 108 handler->_fall();
lypinator 0:bb348c97df44 109 }
lypinator 0:bb348c97df44 110 break;
lypinator 0:bb348c97df44 111 case IRQ_NONE:
lypinator 0:bb348c97df44 112 break;
lypinator 0:bb348c97df44 113 }
lypinator 0:bb348c97df44 114 }
lypinator 0:bb348c97df44 115
lypinator 0:bb348c97df44 116 void InterruptIn::enable_irq()
lypinator 0:bb348c97df44 117 {
lypinator 0:bb348c97df44 118 core_util_critical_section_enter();
lypinator 0:bb348c97df44 119 gpio_irq_enable(&gpio_irq);
lypinator 0:bb348c97df44 120 core_util_critical_section_exit();
lypinator 0:bb348c97df44 121 }
lypinator 0:bb348c97df44 122
lypinator 0:bb348c97df44 123 void InterruptIn::disable_irq()
lypinator 0:bb348c97df44 124 {
lypinator 0:bb348c97df44 125 core_util_critical_section_enter();
lypinator 0:bb348c97df44 126 gpio_irq_disable(&gpio_irq);
lypinator 0:bb348c97df44 127 core_util_critical_section_exit();
lypinator 0:bb348c97df44 128 }
lypinator 0:bb348c97df44 129
lypinator 0:bb348c97df44 130 InterruptIn::operator int()
lypinator 0:bb348c97df44 131 {
lypinator 0:bb348c97df44 132 // Underlying call is atomic
lypinator 0:bb348c97df44 133 return read();
lypinator 0:bb348c97df44 134 }
lypinator 0:bb348c97df44 135
lypinator 0:bb348c97df44 136 } // namespace mbed
lypinator 0:bb348c97df44 137
lypinator 0:bb348c97df44 138 #endif