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?
User | Revision | Line number | New 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 |