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@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Parent:
10:3bc89ef62ce7
Child:
15:4892fe388435
Update mbed sources to revision 64

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #include "InterruptIn.h"
bogdanm 13:0645d8841f51 17
bogdanm 13:0645d8841f51 18 #if DEVICE_INTERRUPTIN
bogdanm 13:0645d8841f51 19
bogdanm 13:0645d8841f51 20 namespace mbed {
bogdanm 13:0645d8841f51 21
bogdanm 13:0645d8841f51 22 InterruptIn::InterruptIn(PinName pin) {
bogdanm 13:0645d8841f51 23 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
bogdanm 13:0645d8841f51 24 gpio_init(&gpio, pin, PIN_INPUT);
bogdanm 13:0645d8841f51 25 }
bogdanm 13:0645d8841f51 26
bogdanm 13:0645d8841f51 27 InterruptIn::~InterruptIn() {
bogdanm 13:0645d8841f51 28 gpio_irq_free(&gpio_irq);
bogdanm 13:0645d8841f51 29 }
bogdanm 13:0645d8841f51 30
bogdanm 13:0645d8841f51 31 int InterruptIn::read() {
bogdanm 13:0645d8841f51 32 return gpio_read(&gpio);
bogdanm 13:0645d8841f51 33 }
bogdanm 13:0645d8841f51 34
bogdanm 13:0645d8841f51 35 void InterruptIn::mode(PinMode pull) {
bogdanm 13:0645d8841f51 36 gpio_mode(&gpio, pull);
bogdanm 13:0645d8841f51 37 }
bogdanm 13:0645d8841f51 38
bogdanm 13:0645d8841f51 39 void InterruptIn::rise(void (*fptr)(void)) {
bogdanm 13:0645d8841f51 40 if (fptr) {
bogdanm 13:0645d8841f51 41 _rise.attach(fptr);
bogdanm 13:0645d8841f51 42 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
bogdanm 13:0645d8841f51 43 } else {
bogdanm 13:0645d8841f51 44 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
bogdanm 13:0645d8841f51 45 }
bogdanm 13:0645d8841f51 46 }
bogdanm 13:0645d8841f51 47
bogdanm 13:0645d8841f51 48 void InterruptIn::fall(void (*fptr)(void)) {
bogdanm 13:0645d8841f51 49 if (fptr) {
bogdanm 13:0645d8841f51 50 _fall.attach(fptr);
bogdanm 13:0645d8841f51 51 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
bogdanm 13:0645d8841f51 52 } else {
bogdanm 13:0645d8841f51 53 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
bogdanm 13:0645d8841f51 54 }
bogdanm 13:0645d8841f51 55 }
bogdanm 13:0645d8841f51 56
bogdanm 13:0645d8841f51 57 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
bogdanm 13:0645d8841f51 58 InterruptIn *handler = (InterruptIn*)id;
bogdanm 13:0645d8841f51 59 switch (event) {
bogdanm 13:0645d8841f51 60 case IRQ_RISE: handler->_rise.call(); break;
bogdanm 13:0645d8841f51 61 case IRQ_FALL: handler->_fall.call(); break;
bogdanm 13:0645d8841f51 62 case IRQ_NONE: break;
bogdanm 13:0645d8841f51 63 }
bogdanm 13:0645d8841f51 64 }
bogdanm 13:0645d8841f51 65
bogdanm 13:0645d8841f51 66 #ifdef MBED_OPERATORS
bogdanm 13:0645d8841f51 67 InterruptIn::operator int() {
bogdanm 13:0645d8841f51 68 return read();
bogdanm 13:0645d8841f51 69 }
bogdanm 13:0645d8841f51 70 #endif
bogdanm 13:0645d8841f51 71
bogdanm 13:0645d8841f51 72 } // namespace mbed
bogdanm 13:0645d8841f51 73
bogdanm 13:0645d8841f51 74 #endif