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@9:0ce32e54c9a7, 2013-06-10 (annotated)

Committer:
emilmont
Date:
Mon Jun 10 16:03:00 2013 +0100
Revision:
9:0ce32e54c9a7
Parent:
cpp/InterruptIn.cpp@2:143cac498751
Child:
10:3bc89ef62ce7
Refactoring of the mbed SDK:

- Provide a well defined HAL and API

- Keep separated the HAL implementations for the different targets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
emilmont 2:143cac498751 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
emilmont 2:143cac498751 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 2:143cac498751 5 * you may not use this file except in compliance with the License.
emilmont 2:143cac498751 6 * You may obtain a copy of the License at
mbed_official 0:fd0d7bdfcdc2 7 *
emilmont 2:143cac498751 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:fd0d7bdfcdc2 9 *
emilmont 2:143cac498751 10 * Unless required by applicable law or agreed to in writing, software
emilmont 2:143cac498751 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 2:143cac498751 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 2:143cac498751 13 * See the License for the specific language governing permissions and
emilmont 2:143cac498751 14 * limitations under the License.
mbed_official 0:fd0d7bdfcdc2 15 */
mbed_official 0:fd0d7bdfcdc2 16 #include "InterruptIn.h"
mbed_official 0:fd0d7bdfcdc2 17
mbed_official 0:fd0d7bdfcdc2 18 #if DEVICE_INTERRUPTIN
mbed_official 0:fd0d7bdfcdc2 19
mbed_official 0:fd0d7bdfcdc2 20 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 21
mbed_official 0:fd0d7bdfcdc2 22 InterruptIn::InterruptIn(PinName pin) {
emilmont 2:143cac498751 23 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
mbed_official 0:fd0d7bdfcdc2 24 gpio_init(&gpio, pin, PIN_INPUT);
mbed_official 0:fd0d7bdfcdc2 25 }
mbed_official 0:fd0d7bdfcdc2 26
mbed_official 0:fd0d7bdfcdc2 27 InterruptIn::~InterruptIn() {
mbed_official 0:fd0d7bdfcdc2 28 gpio_irq_free(&gpio_irq);
mbed_official 0:fd0d7bdfcdc2 29 }
mbed_official 0:fd0d7bdfcdc2 30
emilmont 2:143cac498751 31 int InterruptIn::read() {
mbed_official 0:fd0d7bdfcdc2 32 return gpio_read(&gpio);
mbed_official 0:fd0d7bdfcdc2 33 }
mbed_official 0:fd0d7bdfcdc2 34
mbed_official 0:fd0d7bdfcdc2 35 void InterruptIn::mode(PinMode pull) {
mbed_official 0:fd0d7bdfcdc2 36 gpio_mode(&gpio, pull);
mbed_official 0:fd0d7bdfcdc2 37 }
mbed_official 0:fd0d7bdfcdc2 38
mbed_official 0:fd0d7bdfcdc2 39 void InterruptIn::rise(void (*fptr)(void)) {
mbed_official 0:fd0d7bdfcdc2 40 if (fptr) {
mbed_official 0:fd0d7bdfcdc2 41 _rise.attach(fptr);
mbed_official 0:fd0d7bdfcdc2 42 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
mbed_official 0:fd0d7bdfcdc2 43 } else {
mbed_official 0:fd0d7bdfcdc2 44 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
mbed_official 0:fd0d7bdfcdc2 45 }
mbed_official 0:fd0d7bdfcdc2 46 }
mbed_official 0:fd0d7bdfcdc2 47
mbed_official 0:fd0d7bdfcdc2 48 void InterruptIn::fall(void (*fptr)(void)) {
mbed_official 0:fd0d7bdfcdc2 49 if (fptr) {
mbed_official 0:fd0d7bdfcdc2 50 _fall.attach(fptr);
mbed_official 0:fd0d7bdfcdc2 51 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
mbed_official 0:fd0d7bdfcdc2 52 } else {
mbed_official 0:fd0d7bdfcdc2 53 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
mbed_official 0:fd0d7bdfcdc2 54 }
mbed_official 0:fd0d7bdfcdc2 55 }
mbed_official 0:fd0d7bdfcdc2 56
mbed_official 0:fd0d7bdfcdc2 57 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
mbed_official 0:fd0d7bdfcdc2 58 InterruptIn *handler = (InterruptIn*)id;
mbed_official 0:fd0d7bdfcdc2 59 switch (event) {
mbed_official 0:fd0d7bdfcdc2 60 case IRQ_RISE: handler->_rise.call(); break;
mbed_official 0:fd0d7bdfcdc2 61 case IRQ_FALL: handler->_fall.call(); break;
mbed_official 0:fd0d7bdfcdc2 62 case IRQ_NONE: break;
mbed_official 0:fd0d7bdfcdc2 63 }
mbed_official 0:fd0d7bdfcdc2 64 }
mbed_official 0:fd0d7bdfcdc2 65
mbed_official 0:fd0d7bdfcdc2 66 #ifdef MBED_OPERATORS
mbed_official 0:fd0d7bdfcdc2 67 InterruptIn::operator int() {
mbed_official 0:fd0d7bdfcdc2 68 return read();
mbed_official 0:fd0d7bdfcdc2 69 }
mbed_official 0:fd0d7bdfcdc2 70 #endif
mbed_official 0:fd0d7bdfcdc2 71
mbed_official 0:fd0d7bdfcdc2 72 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 73
mbed_official 0:fd0d7bdfcdc2 74 #endif