mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

drivers/InterruptIn.cpp@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
187:0387e8f68319 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2006-2013 ARM Limited
AnnaBridge 189:f392fc9709a3 3 * SPDX-License-Identifier: Apache-2.0
<> 149:156823d33999 4 *
<> 149:156823d33999 5 * Licensed under the Apache License, Version 2.0 (the "License");
<> 149:156823d33999 6 * you may not use this file except in compliance with the License.
<> 149:156823d33999 7 * You may obtain a copy of the License at
<> 149:156823d33999 8 *
<> 149:156823d33999 9 * http://www.apache.org/licenses/LICENSE-2.0
<> 149:156823d33999 10 *
<> 149:156823d33999 11 * Unless required by applicable law or agreed to in writing, software
<> 149:156823d33999 12 * distributed under the License is distributed on an "AS IS" BASIS,
<> 149:156823d33999 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 149:156823d33999 14 * See the License for the specific language governing permissions and
<> 149:156823d33999 15 * limitations under the License.
<> 149:156823d33999 16 */
<> 149:156823d33999 17 #include "drivers/InterruptIn.h"
<> 149:156823d33999 18
<> 149:156823d33999 19 #if DEVICE_INTERRUPTIN
<> 149:156823d33999 20
<> 149:156823d33999 21 namespace mbed {
<> 149:156823d33999 22
Anna Bridge 186:707f6e361f3e 23 // Note: This single-parameter constructor exists to maintain binary
Anna Bridge 186:707f6e361f3e 24 // compatibility.
Anna Bridge 186:707f6e361f3e 25 // If not for that, we could simplify by having only the 2-param
Anna Bridge 186:707f6e361f3e 26 // constructor, with a default value for the PinMode.
<> 149:156823d33999 27 InterruptIn::InterruptIn(PinName pin) : gpio(),
AnnaBridge 187:0387e8f68319 28 gpio_irq(),
AnnaBridge 187:0387e8f68319 29 _rise(NULL),
AnnaBridge 187:0387e8f68319 30 _fall(NULL)
AnnaBridge 187:0387e8f68319 31 {
<> 149:156823d33999 32 // No lock needed in the constructor
Anna Bridge 186:707f6e361f3e 33 irq_init(pin);
Anna Bridge 186:707f6e361f3e 34 gpio_init_in(&gpio, pin);
Anna Bridge 186:707f6e361f3e 35 }
<> 149:156823d33999 36
Anna Bridge 186:707f6e361f3e 37 InterruptIn::InterruptIn(PinName pin, PinMode mode) :
AnnaBridge 187:0387e8f68319 38 gpio(),
AnnaBridge 187:0387e8f68319 39 gpio_irq(),
AnnaBridge 187:0387e8f68319 40 _rise(NULL),
AnnaBridge 187:0387e8f68319 41 _fall(NULL)
AnnaBridge 187:0387e8f68319 42 {
Anna Bridge 186:707f6e361f3e 43 // No lock needed in the constructor
Anna Bridge 186:707f6e361f3e 44 irq_init(pin);
Anna Bridge 186:707f6e361f3e 45 gpio_init_in_ex(&gpio, pin, mode);
Anna Bridge 186:707f6e361f3e 46 }
Anna Bridge 186:707f6e361f3e 47
AnnaBridge 187:0387e8f68319 48 void InterruptIn::irq_init(PinName pin)
AnnaBridge 187:0387e8f68319 49 {
AnnaBridge 187:0387e8f68319 50 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
<> 149:156823d33999 51 }
<> 149:156823d33999 52
AnnaBridge 187:0387e8f68319 53 InterruptIn::~InterruptIn()
AnnaBridge 187:0387e8f68319 54 {
<> 149:156823d33999 55 // No lock needed in the destructor
<> 149:156823d33999 56 gpio_irq_free(&gpio_irq);
<> 149:156823d33999 57 }
<> 149:156823d33999 58
AnnaBridge 187:0387e8f68319 59 int InterruptIn::read()
AnnaBridge 187:0387e8f68319 60 {
<> 149:156823d33999 61 // Read only
<> 149:156823d33999 62 return gpio_read(&gpio);
<> 149:156823d33999 63 }
<> 149:156823d33999 64
AnnaBridge 187:0387e8f68319 65 void InterruptIn::mode(PinMode pull)
AnnaBridge 187:0387e8f68319 66 {
<> 149:156823d33999 67 core_util_critical_section_enter();
<> 149:156823d33999 68 gpio_mode(&gpio, pull);
<> 149:156823d33999 69 core_util_critical_section_exit();
<> 149:156823d33999 70 }
<> 149:156823d33999 71
AnnaBridge 187:0387e8f68319 72 void InterruptIn::rise(Callback<void()> func)
AnnaBridge 187:0387e8f68319 73 {
<> 149:156823d33999 74 core_util_critical_section_enter();
<> 149:156823d33999 75 if (func) {
<> 160:d5399cc887bb 76 _rise = func;
<> 149:156823d33999 77 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
<> 149:156823d33999 78 } else {
AnnaBridge 175:af195413fb11 79 _rise = NULL;
<> 149:156823d33999 80 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
<> 149:156823d33999 81 }
<> 149:156823d33999 82 core_util_critical_section_exit();
<> 149:156823d33999 83 }
<> 149:156823d33999 84
AnnaBridge 187:0387e8f68319 85 void InterruptIn::fall(Callback<void()> func)
AnnaBridge 187:0387e8f68319 86 {
<> 149:156823d33999 87 core_util_critical_section_enter();
<> 149:156823d33999 88 if (func) {
<> 160:d5399cc887bb 89 _fall = func;
<> 149:156823d33999 90 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
<> 149:156823d33999 91 } else {
AnnaBridge 175:af195413fb11 92 _fall = NULL;
<> 149:156823d33999 93 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
<> 149:156823d33999 94 }
<> 149:156823d33999 95 core_util_critical_section_exit();
<> 149:156823d33999 96 }
<> 149:156823d33999 97
AnnaBridge 187:0387e8f68319 98 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event)
AnnaBridge 187:0387e8f68319 99 {
AnnaBridge 187:0387e8f68319 100 InterruptIn *handler = (InterruptIn *)id;
<> 149:156823d33999 101 switch (event) {
AnnaBridge 187:0387e8f68319 102 case IRQ_RISE:
AnnaBridge 175:af195413fb11 103 if (handler->_rise) {
AnnaBridge 175:af195413fb11 104 handler->_rise();
AnnaBridge 175:af195413fb11 105 }
AnnaBridge 175:af195413fb11 106 break;
AnnaBridge 187:0387e8f68319 107 case IRQ_FALL:
AnnaBridge 175:af195413fb11 108 if (handler->_fall) {
AnnaBridge 187:0387e8f68319 109 handler->_fall();
AnnaBridge 175:af195413fb11 110 }
AnnaBridge 175:af195413fb11 111 break;
AnnaBridge 187:0387e8f68319 112 case IRQ_NONE:
AnnaBridge 187:0387e8f68319 113 break;
<> 149:156823d33999 114 }
<> 149:156823d33999 115 }
<> 149:156823d33999 116
AnnaBridge 187:0387e8f68319 117 void InterruptIn::enable_irq()
AnnaBridge 187:0387e8f68319 118 {
<> 149:156823d33999 119 core_util_critical_section_enter();
<> 149:156823d33999 120 gpio_irq_enable(&gpio_irq);
<> 149:156823d33999 121 core_util_critical_section_exit();
<> 149:156823d33999 122 }
<> 149:156823d33999 123
AnnaBridge 187:0387e8f68319 124 void InterruptIn::disable_irq()
AnnaBridge 187:0387e8f68319 125 {
<> 149:156823d33999 126 core_util_critical_section_enter();
<> 149:156823d33999 127 gpio_irq_disable(&gpio_irq);
<> 149:156823d33999 128 core_util_critical_section_exit();
<> 149:156823d33999 129 }
<> 149:156823d33999 130
AnnaBridge 187:0387e8f68319 131 InterruptIn::operator int()
AnnaBridge 187:0387e8f68319 132 {
<> 149:156823d33999 133 // Underlying call is atomic
<> 149:156823d33999 134 return read();
<> 149:156823d33999 135 }
<> 149:156823d33999 136
<> 149:156823d33999 137 } // namespace mbed
<> 149:156823d33999 138
<> 149:156823d33999 139 #endif