Lancaster University / mbed-src

Lancaster University's (short term!) clone of mbed-src for micro:bit. This is a copy of the github branch https://github.com/lancaster-university/mbed-classic

Fork of mbed-src by mbed official

cpp/InterruptIn.cpp@0:fd0d7bdfcdc2, 2012-11-20 (annotated)

Committer:
mbed_official
Date:
Tue Nov 20 17:24:08 2012 +0000
Revision:
0:fd0d7bdfcdc2
Child:
2:143cac498751
mbed sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
mbed_official 0:fd0d7bdfcdc2 2 * Copyright (c) 2006-2012 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
mbed_official 0:fd0d7bdfcdc2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mbed_official 0:fd0d7bdfcdc2 5 * of this software and associated documentation files (the "Software"), to deal
mbed_official 0:fd0d7bdfcdc2 6 * in the Software without restriction, including without limitation the rights
mbed_official 0:fd0d7bdfcdc2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mbed_official 0:fd0d7bdfcdc2 8 * copies of the Software, and to permit persons to whom the Software is
mbed_official 0:fd0d7bdfcdc2 9 * furnished to do so, subject to the following conditions:
mbed_official 0:fd0d7bdfcdc2 10 *
mbed_official 0:fd0d7bdfcdc2 11 * The above copyright notice and this permission notice shall be included in
mbed_official 0:fd0d7bdfcdc2 12 * all copies or substantial portions of the Software.
mbed_official 0:fd0d7bdfcdc2 13 *
mbed_official 0:fd0d7bdfcdc2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mbed_official 0:fd0d7bdfcdc2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mbed_official 0:fd0d7bdfcdc2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mbed_official 0:fd0d7bdfcdc2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mbed_official 0:fd0d7bdfcdc2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:fd0d7bdfcdc2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mbed_official 0:fd0d7bdfcdc2 20 * SOFTWARE.
mbed_official 0:fd0d7bdfcdc2 21 */
mbed_official 0:fd0d7bdfcdc2 22 #include "InterruptIn.h"
mbed_official 0:fd0d7bdfcdc2 23
mbed_official 0:fd0d7bdfcdc2 24 #if DEVICE_INTERRUPTIN
mbed_official 0:fd0d7bdfcdc2 25
mbed_official 0:fd0d7bdfcdc2 26 #include "error.h"
mbed_official 0:fd0d7bdfcdc2 27
mbed_official 0:fd0d7bdfcdc2 28 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 29
mbed_official 0:fd0d7bdfcdc2 30 InterruptIn::InterruptIn(PinName pin) {
mbed_official 0:fd0d7bdfcdc2 31 if (gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this) != 0)
mbed_official 0:fd0d7bdfcdc2 32 error("[ERROR] InterruptIn init\n");
mbed_official 0:fd0d7bdfcdc2 33 gpio_init(&gpio, pin, PIN_INPUT);
mbed_official 0:fd0d7bdfcdc2 34 }
mbed_official 0:fd0d7bdfcdc2 35
mbed_official 0:fd0d7bdfcdc2 36 InterruptIn::~InterruptIn() {
mbed_official 0:fd0d7bdfcdc2 37 gpio_irq_free(&gpio_irq);
mbed_official 0:fd0d7bdfcdc2 38 }
mbed_official 0:fd0d7bdfcdc2 39
mbed_official 0:fd0d7bdfcdc2 40 int InterruptIn::read() {
mbed_official 0:fd0d7bdfcdc2 41 return gpio_read(&gpio);
mbed_official 0:fd0d7bdfcdc2 42 }
mbed_official 0:fd0d7bdfcdc2 43
mbed_official 0:fd0d7bdfcdc2 44 void InterruptIn::mode(PinMode pull) {
mbed_official 0:fd0d7bdfcdc2 45 gpio_mode(&gpio, pull);
mbed_official 0:fd0d7bdfcdc2 46 }
mbed_official 0:fd0d7bdfcdc2 47
mbed_official 0:fd0d7bdfcdc2 48 void InterruptIn::rise(void (*fptr)(void)) {
mbed_official 0:fd0d7bdfcdc2 49 if (fptr) {
mbed_official 0:fd0d7bdfcdc2 50 _rise.attach(fptr);
mbed_official 0:fd0d7bdfcdc2 51 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
mbed_official 0:fd0d7bdfcdc2 52 } else {
mbed_official 0:fd0d7bdfcdc2 53 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
mbed_official 0:fd0d7bdfcdc2 54 }
mbed_official 0:fd0d7bdfcdc2 55 }
mbed_official 0:fd0d7bdfcdc2 56
mbed_official 0:fd0d7bdfcdc2 57 void InterruptIn::fall(void (*fptr)(void)) {
mbed_official 0:fd0d7bdfcdc2 58 if (fptr) {
mbed_official 0:fd0d7bdfcdc2 59 _fall.attach(fptr);
mbed_official 0:fd0d7bdfcdc2 60 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
mbed_official 0:fd0d7bdfcdc2 61 } else {
mbed_official 0:fd0d7bdfcdc2 62 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
mbed_official 0:fd0d7bdfcdc2 63 }
mbed_official 0:fd0d7bdfcdc2 64 }
mbed_official 0:fd0d7bdfcdc2 65
mbed_official 0:fd0d7bdfcdc2 66 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
mbed_official 0:fd0d7bdfcdc2 67 InterruptIn *handler = (InterruptIn*)id;
mbed_official 0:fd0d7bdfcdc2 68 switch (event) {
mbed_official 0:fd0d7bdfcdc2 69 case IRQ_RISE: handler->_rise.call(); break;
mbed_official 0:fd0d7bdfcdc2 70 case IRQ_FALL: handler->_fall.call(); break;
mbed_official 0:fd0d7bdfcdc2 71 case IRQ_NONE: break;
mbed_official 0:fd0d7bdfcdc2 72 }
mbed_official 0:fd0d7bdfcdc2 73 }
mbed_official 0:fd0d7bdfcdc2 74
mbed_official 0:fd0d7bdfcdc2 75 #ifdef MBED_OPERATORS
mbed_official 0:fd0d7bdfcdc2 76 InterruptIn::operator int() {
mbed_official 0:fd0d7bdfcdc2 77 return read();
mbed_official 0:fd0d7bdfcdc2 78 }
mbed_official 0:fd0d7bdfcdc2 79 #endif
mbed_official 0:fd0d7bdfcdc2 80
mbed_official 0:fd0d7bdfcdc2 81 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 82
mbed_official 0:fd0d7bdfcdc2 83 #endif