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@187:0387e8f68319, 2018-09-06 (annotated)

Committer:
AnnaBridge
Date:
Thu Sep 06 13:40:20 2018 +0100
Revision:
187:0387e8f68319
Parent:
186:707f6e361f3e
Child:
189:f392fc9709a3
mbed-dev library. Release version 163

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