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

common/InterruptIn.cpp@10:3bc89ef62ce7, 2013-06-14 (annotated)

Committer:
emilmont
Date:
Fri Jun 14 17:49:17 2013 +0100
Revision:
10:3bc89ef62ce7
Parent:
9:0ce32e54c9a7
Child:
13:0645d8841f51
Unify mbed library sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
emilmont 10:3bc89ef62ce7 16 #include "InterruptIn.h"
emilmont 10:3bc89ef62ce7 17
emilmont 10:3bc89ef62ce7 18 #if DEVICE_INTERRUPTIN
emilmont 10:3bc89ef62ce7 19
emilmont 10:3bc89ef62ce7 20 namespace mbed {
emilmont 10:3bc89ef62ce7 21
emilmont 10:3bc89ef62ce7 22 InterruptIn::InterruptIn(PinName pin) {
emilmont 10:3bc89ef62ce7 23 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
emilmont 10:3bc89ef62ce7 24 gpio_init(&gpio, pin, PIN_INPUT);
emilmont 10:3bc89ef62ce7 25 }
emilmont 10:3bc89ef62ce7 26
emilmont 10:3bc89ef62ce7 27 InterruptIn::~InterruptIn() {
emilmont 10:3bc89ef62ce7 28 gpio_irq_free(&gpio_irq);
emilmont 10:3bc89ef62ce7 29 }
emilmont 10:3bc89ef62ce7 30
emilmont 10:3bc89ef62ce7 31 int InterruptIn::read() {
emilmont 10:3bc89ef62ce7 32 return gpio_read(&gpio);
emilmont 10:3bc89ef62ce7 33 }
emilmont 10:3bc89ef62ce7 34
emilmont 10:3bc89ef62ce7 35 void InterruptIn::mode(PinMode pull) {
emilmont 10:3bc89ef62ce7 36 gpio_mode(&gpio, pull);
emilmont 10:3bc89ef62ce7 37 }
emilmont 10:3bc89ef62ce7 38
emilmont 10:3bc89ef62ce7 39 void InterruptIn::rise(void (*fptr)(void)) {
emilmont 10:3bc89ef62ce7 40 if (fptr) {
emilmont 10:3bc89ef62ce7 41 _rise.attach(fptr);
emilmont 10:3bc89ef62ce7 42 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
emilmont 10:3bc89ef62ce7 43 } else {
emilmont 10:3bc89ef62ce7 44 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
emilmont 10:3bc89ef62ce7 45 }
emilmont 10:3bc89ef62ce7 46 }
emilmont 10:3bc89ef62ce7 47
emilmont 10:3bc89ef62ce7 48 void InterruptIn::fall(void (*fptr)(void)) {
emilmont 10:3bc89ef62ce7 49 if (fptr) {
emilmont 10:3bc89ef62ce7 50 _fall.attach(fptr);
emilmont 10:3bc89ef62ce7 51 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
emilmont 10:3bc89ef62ce7 52 } else {
emilmont 10:3bc89ef62ce7 53 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
emilmont 10:3bc89ef62ce7 54 }
emilmont 10:3bc89ef62ce7 55 }
emilmont 10:3bc89ef62ce7 56
emilmont 10:3bc89ef62ce7 57 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
emilmont 10:3bc89ef62ce7 58 InterruptIn *handler = (InterruptIn*)id;
emilmont 10:3bc89ef62ce7 59 switch (event) {
emilmont 10:3bc89ef62ce7 60 case IRQ_RISE: handler->_rise.call(); break;
emilmont 10:3bc89ef62ce7 61 case IRQ_FALL: handler->_fall.call(); break;
emilmont 10:3bc89ef62ce7 62 case IRQ_NONE: break;
emilmont 10:3bc89ef62ce7 63 }
emilmont 10:3bc89ef62ce7 64 }
emilmont 10:3bc89ef62ce7 65
emilmont 10:3bc89ef62ce7 66 #ifdef MBED_OPERATORS
emilmont 10:3bc89ef62ce7 67 InterruptIn::operator int() {
emilmont 10:3bc89ef62ce7 68 return read();
emilmont 10:3bc89ef62ce7 69 }
emilmont 10:3bc89ef62ce7 70 #endif
emilmont 10:3bc89ef62ce7 71
emilmont 10:3bc89ef62ce7 72 } // namespace mbed
emilmont 10:3bc89ef62ce7 73
emilmont 10:3bc89ef62ce7 74 #endif