Rahul Dahiya / Mbed OS STM32F7 Ethernet

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mbed-os/drivers/InterruptIn.cpp@0:fb8047b156bb, 2020-01-15 (annotated)

Committer:
rahul_dahiya
Date:
Wed Jan 15 15:57:15 2020 +0530
Revision:
0:fb8047b156bb
STM32F7 LWIP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rahul_dahiya 0:fb8047b156bb 1 /* mbed Microcontroller Library
rahul_dahiya 0:fb8047b156bb 2 * Copyright (c) 2006-2013 ARM Limited
rahul_dahiya 0:fb8047b156bb 3 *
rahul_dahiya 0:fb8047b156bb 4 * Licensed under the Apache License, Version 2.0 (the "License");
rahul_dahiya 0:fb8047b156bb 5 * you may not use this file except in compliance with the License.
rahul_dahiya 0:fb8047b156bb 6 * You may obtain a copy of the License at
rahul_dahiya 0:fb8047b156bb 7 *
rahul_dahiya 0:fb8047b156bb 8 * http://www.apache.org/licenses/LICENSE-2.0
rahul_dahiya 0:fb8047b156bb 9 *
rahul_dahiya 0:fb8047b156bb 10 * Unless required by applicable law or agreed to in writing, software
rahul_dahiya 0:fb8047b156bb 11 * distributed under the License is distributed on an "AS IS" BASIS,
rahul_dahiya 0:fb8047b156bb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rahul_dahiya 0:fb8047b156bb 13 * See the License for the specific language governing permissions and
rahul_dahiya 0:fb8047b156bb 14 * limitations under the License.
rahul_dahiya 0:fb8047b156bb 15 */
rahul_dahiya 0:fb8047b156bb 16 #include "drivers/InterruptIn.h"
rahul_dahiya 0:fb8047b156bb 17
rahul_dahiya 0:fb8047b156bb 18 #if DEVICE_INTERRUPTIN
rahul_dahiya 0:fb8047b156bb 19
rahul_dahiya 0:fb8047b156bb 20 namespace mbed {
rahul_dahiya 0:fb8047b156bb 21
rahul_dahiya 0:fb8047b156bb 22 InterruptIn::InterruptIn(PinName pin) : gpio(),
rahul_dahiya 0:fb8047b156bb 23 gpio_irq(),
rahul_dahiya 0:fb8047b156bb 24 _rise(NULL),
rahul_dahiya 0:fb8047b156bb 25 _fall(NULL) {
rahul_dahiya 0:fb8047b156bb 26 // No lock needed in the constructor
rahul_dahiya 0:fb8047b156bb 27
rahul_dahiya 0:fb8047b156bb 28 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
rahul_dahiya 0:fb8047b156bb 29 gpio_init_in(&gpio, pin);
rahul_dahiya 0:fb8047b156bb 30 }
rahul_dahiya 0:fb8047b156bb 31
rahul_dahiya 0:fb8047b156bb 32 InterruptIn::~InterruptIn() {
rahul_dahiya 0:fb8047b156bb 33 // No lock needed in the destructor
rahul_dahiya 0:fb8047b156bb 34 gpio_irq_free(&gpio_irq);
rahul_dahiya 0:fb8047b156bb 35 }
rahul_dahiya 0:fb8047b156bb 36
rahul_dahiya 0:fb8047b156bb 37 int InterruptIn::read() {
rahul_dahiya 0:fb8047b156bb 38 // Read only
rahul_dahiya 0:fb8047b156bb 39 return gpio_read(&gpio);
rahul_dahiya 0:fb8047b156bb 40 }
rahul_dahiya 0:fb8047b156bb 41
rahul_dahiya 0:fb8047b156bb 42 void InterruptIn::mode(PinMode pull) {
rahul_dahiya 0:fb8047b156bb 43 core_util_critical_section_enter();
rahul_dahiya 0:fb8047b156bb 44 gpio_mode(&gpio, pull);
rahul_dahiya 0:fb8047b156bb 45 core_util_critical_section_exit();
rahul_dahiya 0:fb8047b156bb 46 }
rahul_dahiya 0:fb8047b156bb 47
rahul_dahiya 0:fb8047b156bb 48 void InterruptIn::rise(Callback<void()> func) {
rahul_dahiya 0:fb8047b156bb 49 core_util_critical_section_enter();
rahul_dahiya 0:fb8047b156bb 50 if (func) {
rahul_dahiya 0:fb8047b156bb 51 _rise = func;
rahul_dahiya 0:fb8047b156bb 52 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
rahul_dahiya 0:fb8047b156bb 53 } else {
rahul_dahiya 0:fb8047b156bb 54 _rise = NULL;
rahul_dahiya 0:fb8047b156bb 55 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
rahul_dahiya 0:fb8047b156bb 56 }
rahul_dahiya 0:fb8047b156bb 57 core_util_critical_section_exit();
rahul_dahiya 0:fb8047b156bb 58 }
rahul_dahiya 0:fb8047b156bb 59
rahul_dahiya 0:fb8047b156bb 60 void InterruptIn::fall(Callback<void()> func) {
rahul_dahiya 0:fb8047b156bb 61 core_util_critical_section_enter();
rahul_dahiya 0:fb8047b156bb 62 if (func) {
rahul_dahiya 0:fb8047b156bb 63 _fall = func;
rahul_dahiya 0:fb8047b156bb 64 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
rahul_dahiya 0:fb8047b156bb 65 } else {
rahul_dahiya 0:fb8047b156bb 66 _fall = NULL;
rahul_dahiya 0:fb8047b156bb 67 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
rahul_dahiya 0:fb8047b156bb 68 }
rahul_dahiya 0:fb8047b156bb 69 core_util_critical_section_exit();
rahul_dahiya 0:fb8047b156bb 70 }
rahul_dahiya 0:fb8047b156bb 71
rahul_dahiya 0:fb8047b156bb 72 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
rahul_dahiya 0:fb8047b156bb 73 InterruptIn *handler = (InterruptIn*)id;
rahul_dahiya 0:fb8047b156bb 74 switch (event) {
rahul_dahiya 0:fb8047b156bb 75 case IRQ_RISE:
rahul_dahiya 0:fb8047b156bb 76 if (handler->_rise) {
rahul_dahiya 0:fb8047b156bb 77 handler->_rise();
rahul_dahiya 0:fb8047b156bb 78 }
rahul_dahiya 0:fb8047b156bb 79 break;
rahul_dahiya 0:fb8047b156bb 80 case IRQ_FALL:
rahul_dahiya 0:fb8047b156bb 81 if (handler->_fall) {
rahul_dahiya 0:fb8047b156bb 82 handler->_fall();
rahul_dahiya 0:fb8047b156bb 83 }
rahul_dahiya 0:fb8047b156bb 84 break;
rahul_dahiya 0:fb8047b156bb 85 case IRQ_NONE: break;
rahul_dahiya 0:fb8047b156bb 86 }
rahul_dahiya 0:fb8047b156bb 87 }
rahul_dahiya 0:fb8047b156bb 88
rahul_dahiya 0:fb8047b156bb 89 void InterruptIn::enable_irq() {
rahul_dahiya 0:fb8047b156bb 90 core_util_critical_section_enter();
rahul_dahiya 0:fb8047b156bb 91 gpio_irq_enable(&gpio_irq);
rahul_dahiya 0:fb8047b156bb 92 core_util_critical_section_exit();
rahul_dahiya 0:fb8047b156bb 93 }
rahul_dahiya 0:fb8047b156bb 94
rahul_dahiya 0:fb8047b156bb 95 void InterruptIn::disable_irq() {
rahul_dahiya 0:fb8047b156bb 96 core_util_critical_section_enter();
rahul_dahiya 0:fb8047b156bb 97 gpio_irq_disable(&gpio_irq);
rahul_dahiya 0:fb8047b156bb 98 core_util_critical_section_exit();
rahul_dahiya 0:fb8047b156bb 99 }
rahul_dahiya 0:fb8047b156bb 100
rahul_dahiya 0:fb8047b156bb 101 InterruptIn::operator int() {
rahul_dahiya 0:fb8047b156bb 102 // Underlying call is atomic
rahul_dahiya 0:fb8047b156bb 103 return read();
rahul_dahiya 0:fb8047b156bb 104 }
rahul_dahiya 0:fb8047b156bb 105
rahul_dahiya 0:fb8047b156bb 106 } // namespace mbed
rahul_dahiya 0:fb8047b156bb 107
rahul_dahiya 0:fb8047b156bb 108 #endif