mirror of https://github.com/ARMmbed/mbed-os.git
111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "InterruptIn.h"
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#if DEVICE_INTERRUPTIN
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namespace mbed {
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InterruptIn::InterruptIn(PinName pin) {
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gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
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gpio_init(&gpio, pin, PIN_INPUT);
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}
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InterruptIn::~InterruptIn() {
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gpio_irq_free(&gpio_irq);
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}
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int InterruptIn::read() {
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return gpio_read(&gpio);
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}
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void InterruptIn::mode(PinMode pull) {
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gpio_mode(&gpio, pull);
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}
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pFunctionPointer_t InterruptIn::rise(void (*fptr)(void)) {
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pFunctionPointer_t pf = NULL;
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_rise.clear();
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if (fptr) {
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pf = _rise.add(fptr);
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gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
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} else {
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gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
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}
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return pf;
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}
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pFunctionPointer_t InterruptIn::rise_add_common(void (*fptr)(void), bool front) {
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if (NULL == fptr)
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return NULL;
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pFunctionPointer_t pf = front ? _rise.add_front(fptr) : _rise.add(fptr);
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gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
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return pf;
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}
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bool InterruptIn::rise_remove(pFunctionPointer_t pf) {
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bool res = _rise.remove(pf);
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if (res && _rise.size() == 0)
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gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
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return res;
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}
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pFunctionPointer_t InterruptIn::fall(void (*fptr)(void)) {
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pFunctionPointer_t pf = NULL;
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_fall.clear();
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if (fptr) {
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pf = _fall.add(fptr);
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gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
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} else {
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gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
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}
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return pf;
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}
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pFunctionPointer_t InterruptIn::fall_add_common(void (*fptr)(void), bool front) {
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if (NULL == fptr)
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return NULL;
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pFunctionPointer_t pf = front ? _fall.add_front(fptr) : _fall.add(fptr);
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gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
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return pf;
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}
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bool InterruptIn::fall_remove(pFunctionPointer_t pf) {
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bool res = _fall.remove(pf);
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if (res && _fall.size() == 0)
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gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
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return res;
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}
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void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
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InterruptIn *handler = (InterruptIn*)id;
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switch (event) {
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case IRQ_RISE: handler->_rise.call(); break;
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case IRQ_FALL: handler->_fall.call(); break;
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case IRQ_NONE: break;
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}
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}
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#ifdef MBED_OPERATORS
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InterruptIn::operator int() {
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return read();
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}
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#endif
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} // namespace mbed
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#endif
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