mirror of https://github.com/ARMmbed/mbed-os.git
139 lines
3.2 KiB
C++
139 lines
3.2 KiB
C++
/* 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 {
|
|
|
|
// Note: This single-parameter constructor exists to maintain binary
|
|
// compatibility.
|
|
// If not for that, we could simplify by having only the 2-param
|
|
// constructor, with a default value for the PinMode.
|
|
InterruptIn::InterruptIn(PinName pin) : gpio(),
|
|
gpio_irq(),
|
|
_rise(NULL),
|
|
_fall(NULL)
|
|
{
|
|
// No lock needed in the constructor
|
|
irq_init(pin);
|
|
gpio_init_in(&gpio, pin);
|
|
}
|
|
|
|
InterruptIn::InterruptIn(PinName pin, PinMode mode) :
|
|
gpio(),
|
|
gpio_irq(),
|
|
_rise(NULL),
|
|
_fall(NULL)
|
|
{
|
|
// No lock needed in the constructor
|
|
irq_init(pin);
|
|
gpio_init_in_ex(&gpio, pin, mode);
|
|
}
|
|
|
|
void InterruptIn::irq_init(PinName pin)
|
|
{
|
|
gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
|
|
}
|
|
|
|
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
|