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/*
* File : pin.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2015, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2015-01-20 Bernard the first version
*/
#include <drivers/pin.h>
#ifdef RT_USING_FINSH
#include <finsh.h>
#endif
static struct rt_device_pin _hw_pin;
static rt_size_t _pin_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{
struct rt_device_pin_status *status;
struct rt_device_pin *pin = (struct rt_device_pin *)dev;
/* check parameters */
RT_ASSERT(pin != RT_NULL);
status = (struct rt_device_pin_status *) buffer;
if (status == RT_NULL || size != sizeof(*status)) return 0;
status->status = pin->ops->pin_read(dev, status->pin);
return size;
}
static rt_size_t _pin_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
struct rt_device_pin_status *status;
struct rt_device_pin *pin = (struct rt_device_pin *)dev;
/* check parameters */
RT_ASSERT(pin != RT_NULL);
status = (struct rt_device_pin_status *) buffer;
if (status == RT_NULL || size != sizeof(*status)) return 0;
pin->ops->pin_write(dev, (rt_base_t)status->pin, (rt_base_t)status->status);
return size;
}
static rt_err_t _pin_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
struct rt_device_pin_mode *mode;
struct rt_device_pin *pin = (struct rt_device_pin *)dev;
/* check parameters */
RT_ASSERT(pin != RT_NULL);
mode = (struct rt_device_pin_mode *) args;
if (mode == RT_NULL) return -RT_ERROR;
pin->ops->pin_mode(dev, (rt_base_t)mode->pin, (rt_base_t)mode->mode);
return 0;
}
int rt_device_pin_register(const char *name, const struct rt_pin_ops *ops, void *user_data)
{
_hw_pin.parent.type = RT_Device_Class_Miscellaneous;
_hw_pin.parent.rx_indicate = RT_NULL;
_hw_pin.parent.tx_complete = RT_NULL;
_hw_pin.parent.init = RT_NULL;
_hw_pin.parent.open = RT_NULL;
_hw_pin.parent.close = RT_NULL;
_hw_pin.parent.read = _pin_read;
_hw_pin.parent.write = _pin_write;
_hw_pin.parent.control = _pin_control;
_hw_pin.ops = ops;
_hw_pin.parent.user_data = user_data;
/* register a character device */
rt_device_register(&_hw_pin.parent, "pin", RT_DEVICE_FLAG_RDWR);
return 0;
}
/* RT-Thread Hardware PIN APIs */
void rt_pin_mode(rt_base_t pin, rt_base_t mode)
{
_hw_pin.ops->pin_mode(&_hw_pin.parent, pin, mode);
}
FINSH_FUNCTION_EXPORT_ALIAS(rt_pin_mode, pinMode, set hardware pin mode);
void rt_pin_write(rt_base_t pin, rt_base_t value)
{
_hw_pin.ops->pin_write(&_hw_pin.parent, pin, value);
}
FINSH_FUNCTION_EXPORT_ALIAS(rt_pin_write, pinWrite, write value to hardware pin);
int rt_pin_read(rt_base_t pin)
{
return _hw_pin.ops->pin_read(&_hw_pin.parent, pin);
}
FINSH_FUNCTION_EXPORT_ALIAS(rt_pin_read, pinRead, read status from hardware pin);
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