Permalink
Fetching contributors…
Cannot retrieve contributors at this time
86 lines (71 sloc) 2.09 KB
/* 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(),
gpio_irq(),
_rise(),
_fall() {
gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
gpio_init_in(&gpio, pin);
}
InterruptIn::~InterruptIn() {
gpio_irq_free(&gpio_irq);
}
int InterruptIn::read() {
return gpio_read(&gpio);
}
void InterruptIn::mode(PinMode pull) {
gpio_mode(&gpio, pull);
}
void InterruptIn::rise(void (*fptr)(void)) {
if (fptr) {
_rise.attach(fptr);
gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
} else {
gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
}
}
void InterruptIn::fall(void (*fptr)(void)) {
if (fptr) {
_fall.attach(fptr);
gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
} else {
gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
}
}
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;
}
}
void InterruptIn::enable_irq() {
gpio_irq_enable(&gpio_irq);
}
void InterruptIn::disable_irq() {
gpio_irq_disable(&gpio_irq);
}
#ifdef MBED_OPERATORS
InterruptIn::operator int() {
return read();
}
#endif
} // namespace mbed
#endif