mbed library sources
Fork of mbed-src by
common/InterruptIn.cpp
- Committer:
- bogdanm
- Date:
- 2013-08-07
- Revision:
- 15:4892fe388435
- Parent:
- 13:0645d8841f51
- Child:
- 35:371630885ad6
File content as of revision 15:4892fe388435:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "InterruptIn.h" #if DEVICE_INTERRUPTIN namespace mbed { InterruptIn::InterruptIn(PinName pin) { gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this); gpio_init(&gpio, pin, PIN_INPUT); } InterruptIn::~InterruptIn() { gpio_irq_free(&gpio_irq); } int InterruptIn::read() { return gpio_read(&gpio); } void InterruptIn::mode(PinMode pull) { gpio_mode(&gpio, pull); } pFunctionPointer_t InterruptIn::rise(void (*fptr)(void)) { pFunctionPointer_t pf = NULL; _rise.clear(); if (fptr) { pf = _rise.add(fptr); gpio_irq_set(&gpio_irq, IRQ_RISE, 1); } else { gpio_irq_set(&gpio_irq, IRQ_RISE, 0); } return pf; } pFunctionPointer_t InterruptIn::rise_add_common(void (*fptr)(void), bool front) { if (NULL == fptr) return NULL; pFunctionPointer_t pf = front ? _rise.add_front(fptr) : _rise.add(fptr); gpio_irq_set(&gpio_irq, IRQ_RISE, 1); return pf; } bool InterruptIn::rise_remove(pFunctionPointer_t pf) { bool res = _rise.remove(pf); if (res && _rise.size() == 0) gpio_irq_set(&gpio_irq, IRQ_RISE, 0); return res; } pFunctionPointer_t InterruptIn::fall(void (*fptr)(void)) { pFunctionPointer_t pf = NULL; _fall.clear(); if (fptr) { pf = _fall.add(fptr); gpio_irq_set(&gpio_irq, IRQ_FALL, 1); } else { gpio_irq_set(&gpio_irq, IRQ_FALL, 0); } return pf; } pFunctionPointer_t InterruptIn::fall_add_common(void (*fptr)(void), bool front) { if (NULL == fptr) return NULL; pFunctionPointer_t pf = front ? _fall.add_front(fptr) : _fall.add(fptr); gpio_irq_set(&gpio_irq, IRQ_FALL, 1); return pf; } bool InterruptIn::fall_remove(pFunctionPointer_t pf) { bool res = _fall.remove(pf); if (res && _fall.size() == 0) gpio_irq_set(&gpio_irq, IRQ_FALL, 0); return res; } void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) { InterruptIn *handler = (InterruptIn*)id; switch (event) { case IRQ_RISE: handler->_rise.call(); break; case IRQ_FALL: handler->_fall.call(); break; case IRQ_NONE: break; } } #ifdef MBED_OPERATORS InterruptIn::operator int() { return read(); } #endif } // namespace mbed #endif