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