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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-08-08 balanceTWK the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
static rt_err_t rt_encoder_init(struct rt_device *dev)
{
struct rt_encoder_device *encoder;
encoder = (struct rt_encoder_device *)dev;
if (encoder->ops->init)
{
return encoder->ops->init(encoder);
}
else
{
return -RT_ENOSYS;
}
}
static rt_err_t rt_encoder_open(struct rt_device *dev, rt_uint16_t oflag)
{
struct rt_encoder_device *encoder;
encoder = (struct rt_encoder_device *)dev;
if (encoder->ops->control)
{
return encoder->ops->control(encoder, ENCODER_CMD_ENABLE, RT_NULL);
}
else
{
return -RT_ENOSYS;
}
}
static rt_err_t rt_encoder_close(struct rt_device *dev)
{
struct rt_encoder_device *encoder;
encoder = (struct rt_encoder_device *)dev;
if (encoder->ops->control)
{
return encoder->ops->control(encoder, ENCODER_CMD_DISABLE, RT_NULL);
}
else
{
return -RT_ENOSYS;
}
}
static rt_size_t rt_encoder_read(struct rt_device *dev, rt_off_t pos, void *buffer, rt_size_t size)
{
struct rt_encoder_device *encoder;
encoder = (struct rt_encoder_device *)dev;
if (encoder->ops->get_count)
{
*(rt_int32_t *)buffer = encoder->ops->get_count(encoder);
}
return 1;
}
static rt_err_t rt_encoder_control(struct rt_device *dev, int cmd, void *args)
{
rt_err_t result;
struct rt_encoder_device *encoder;
result = RT_EOK;
encoder = (struct rt_encoder_device *)dev;
switch (cmd)
{
case ENCODER_CMD_GET_TYPE:
*(enum rt_encoder_type *)args = encoder->type;
break;
case ENCODER_CMD_ENABLE:
case ENCODER_CMD_DISABLE:
case ENCODER_CMD_CLEAR_COUNT:
result = encoder->ops->control(encoder, cmd, args);
break;
default:
result = -RT_ENOSYS;
break;
}
return result;
}
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops encoder_ops =
{
rt_encoder_init,
rt_encoder_open,
rt_encoder_close,
rt_encoder_read,
RT_NULL,
rt_encoder_control
};
#endif
rt_err_t rt_device_encoder_register(struct rt_encoder_device *encoder, const char *name, void *user_data)
{
struct rt_device *device;
RT_ASSERT(encoder != RT_NULL);
RT_ASSERT(encoder->ops != RT_NULL);
device = &(encoder->parent);
device->type = RT_Device_Class_Miscellaneous;
device->rx_indicate = RT_NULL;
device->tx_complete = RT_NULL;
#ifdef RT_USING_DEVICE_OPS
device->ops = &encoder_ops;
#else
device->init = rt_encoder_init;
device->open = rt_encoder_open;
device->close = rt_encoder_close;
device->read = rt_encoder_read;
device->write = RT_NULL;
device->control = rt_encoder_control;
#endif
device->user_data = user_data;
return rt_device_register(device, name, RT_DEVICE_FLAG_RDONLY | RT_DEVICE_FLAG_STANDALONE);
}
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