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common/InterruptIn.cpp@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
30:748c8b6e75b1
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "InterruptIn.h"
bogdanm 0:9b334a45a8ff 17
bogdanm 0:9b334a45a8ff 18 #if DEVICE_INTERRUPTIN
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 namespace mbed {
bogdanm 0:9b334a45a8ff 21
bogdanm 0:9b334a45a8ff 22 InterruptIn::InterruptIn(PinName pin) : gpio(),
bogdanm 0:9b334a45a8ff 23 gpio_irq(),
bogdanm 0:9b334a45a8ff 24 _rise(),
bogdanm 0:9b334a45a8ff 25 _fall() {
bogdanm 0:9b334a45a8ff 26 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
bogdanm 0:9b334a45a8ff 27 gpio_init_in(&gpio, pin);
bogdanm 0:9b334a45a8ff 28 }
bogdanm 0:9b334a45a8ff 29
bogdanm 0:9b334a45a8ff 30 InterruptIn::~InterruptIn() {
bogdanm 0:9b334a45a8ff 31 gpio_irq_free(&gpio_irq);
bogdanm 0:9b334a45a8ff 32 }
bogdanm 0:9b334a45a8ff 33
bogdanm 0:9b334a45a8ff 34 int InterruptIn::read() {
bogdanm 0:9b334a45a8ff 35 return gpio_read(&gpio);
bogdanm 0:9b334a45a8ff 36 }
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 void InterruptIn::mode(PinMode pull) {
bogdanm 0:9b334a45a8ff 39 gpio_mode(&gpio, pull);
bogdanm 0:9b334a45a8ff 40 }
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 void InterruptIn::rise(void (*fptr)(void)) {
bogdanm 0:9b334a45a8ff 43 if (fptr) {
bogdanm 0:9b334a45a8ff 44 _rise.attach(fptr);
bogdanm 0:9b334a45a8ff 45 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
bogdanm 0:9b334a45a8ff 46 } else {
bogdanm 0:9b334a45a8ff 47 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
bogdanm 0:9b334a45a8ff 48 }
bogdanm 0:9b334a45a8ff 49 }
bogdanm 0:9b334a45a8ff 50
bogdanm 0:9b334a45a8ff 51 void InterruptIn::fall(void (*fptr)(void)) {
bogdanm 0:9b334a45a8ff 52 if (fptr) {
bogdanm 0:9b334a45a8ff 53 _fall.attach(fptr);
bogdanm 0:9b334a45a8ff 54 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
bogdanm 0:9b334a45a8ff 55 } else {
bogdanm 0:9b334a45a8ff 56 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
bogdanm 0:9b334a45a8ff 57 }
bogdanm 0:9b334a45a8ff 58 }
bogdanm 0:9b334a45a8ff 59
bogdanm 0:9b334a45a8ff 60 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
bogdanm 0:9b334a45a8ff 61 InterruptIn *handler = (InterruptIn*)id;
bogdanm 0:9b334a45a8ff 62 switch (event) {
bogdanm 0:9b334a45a8ff 63 case IRQ_RISE: handler->_rise.call(); break;
bogdanm 0:9b334a45a8ff 64 case IRQ_FALL: handler->_fall.call(); break;
bogdanm 0:9b334a45a8ff 65 case IRQ_NONE: break;
bogdanm 0:9b334a45a8ff 66 }
bogdanm 0:9b334a45a8ff 67 }
bogdanm 0:9b334a45a8ff 68
bogdanm 0:9b334a45a8ff 69 void InterruptIn::enable_irq() {
bogdanm 0:9b334a45a8ff 70 gpio_irq_enable(&gpio_irq);
bogdanm 0:9b334a45a8ff 71 }
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73 void InterruptIn::disable_irq() {
bogdanm 0:9b334a45a8ff 74 gpio_irq_disable(&gpio_irq);
bogdanm 0:9b334a45a8ff 75 }
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 #ifdef MBED_OPERATORS
bogdanm 0:9b334a45a8ff 78 InterruptIn::operator int() {
bogdanm 0:9b334a45a8ff 79 return read();
bogdanm 0:9b334a45a8ff 80 }
bogdanm 0:9b334a45a8ff 81 #endif
bogdanm 0:9b334a45a8ff 82
bogdanm 0:9b334a45a8ff 83 } // namespace mbed
bogdanm 0:9b334a45a8ff 84
bogdanm 0:9b334a45a8ff 85 #endif