mbed library sources. Supersedes mbed-src.
Dependents: Hobbyking_Cheetah_Compact Hobbyking_Cheetah_Compact_DRV8323_14bit Hobbyking_Cheetah_Compact_DRV8323_V51_201907 HKC_MiniCheetah ... more
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drivers/InterruptIn.cpp
- Committer:
- benkatz
- Date:
- 2018-07-30
- Revision:
- 181:36facd806e4a
- Parent:
- 175:af195413fb11
File content as of revision 181:36facd806e4a:
/* 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 "drivers/InterruptIn.h" #if DEVICE_INTERRUPTIN namespace mbed { InterruptIn::InterruptIn(PinName pin) : gpio(), gpio_irq(), _rise(NULL), _fall(NULL) { // No lock needed in the constructor gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this); gpio_init_in(&gpio, pin); } InterruptIn::~InterruptIn() { // No lock needed in the destructor gpio_irq_free(&gpio_irq); } int InterruptIn::read() { // Read only return gpio_read(&gpio); } void InterruptIn::mode(PinMode pull) { core_util_critical_section_enter(); gpio_mode(&gpio, pull); core_util_critical_section_exit(); } void InterruptIn::rise(Callback<void()> func) { core_util_critical_section_enter(); if (func) { _rise = func; gpio_irq_set(&gpio_irq, IRQ_RISE, 1); } else { _rise = NULL; gpio_irq_set(&gpio_irq, IRQ_RISE, 0); } core_util_critical_section_exit(); } void InterruptIn::fall(Callback<void()> func) { core_util_critical_section_enter(); if (func) { _fall = func; gpio_irq_set(&gpio_irq, IRQ_FALL, 1); } else { _fall = NULL; gpio_irq_set(&gpio_irq, IRQ_FALL, 0); } core_util_critical_section_exit(); } void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) { InterruptIn *handler = (InterruptIn*)id; switch (event) { case IRQ_RISE: if (handler->_rise) { handler->_rise(); } break; case IRQ_FALL: if (handler->_fall) { handler->_fall(); } break; case IRQ_NONE: break; } } void InterruptIn::enable_irq() { core_util_critical_section_enter(); gpio_irq_enable(&gpio_irq); core_util_critical_section_exit(); } void InterruptIn::disable_irq() { core_util_critical_section_enter(); gpio_irq_disable(&gpio_irq); core_util_critical_section_exit(); } InterruptIn::operator int() { // Underlying call is atomic return read(); } } // namespace mbed #endif