136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-08-08 balanceTWK the first version
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*/
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#include <rtdevice.h>
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static rt_err_t rt_pulse_encoder_init(struct rt_device *dev)
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{
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struct rt_pulse_encoder_device *pulse_encoder;
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pulse_encoder = (struct rt_pulse_encoder_device *)dev;
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if (pulse_encoder->ops->init)
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{
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return pulse_encoder->ops->init(pulse_encoder);
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}
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else
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{
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return -RT_ENOSYS;
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}
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}
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static rt_err_t rt_pulse_encoder_open(struct rt_device *dev, rt_uint16_t oflag)
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{
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struct rt_pulse_encoder_device *pulse_encoder;
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pulse_encoder = (struct rt_pulse_encoder_device *)dev;
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if (pulse_encoder->ops->control)
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{
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return pulse_encoder->ops->control(pulse_encoder, PULSE_ENCODER_CMD_ENABLE, RT_NULL);
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}
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else
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{
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return -RT_ENOSYS;
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}
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}
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static rt_err_t rt_pulse_encoder_close(struct rt_device *dev)
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{
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struct rt_pulse_encoder_device *pulse_encoder;
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pulse_encoder = (struct rt_pulse_encoder_device *)dev;
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if (pulse_encoder->ops->control)
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{
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return pulse_encoder->ops->control(pulse_encoder, PULSE_ENCODER_CMD_DISABLE, RT_NULL);
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}
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else
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{
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return -RT_ENOSYS;
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}
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}
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static rt_ssize_t rt_pulse_encoder_read(struct rt_device *dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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struct rt_pulse_encoder_device *pulse_encoder;
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pulse_encoder = (struct rt_pulse_encoder_device *)dev;
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if (pulse_encoder->ops->get_count)
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{
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*(rt_int32_t *)buffer = pulse_encoder->ops->get_count(pulse_encoder);
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}
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return 1;
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}
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static rt_err_t rt_pulse_encoder_control(struct rt_device *dev, int cmd, void *args)
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{
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rt_err_t result;
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struct rt_pulse_encoder_device *pulse_encoder;
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result = RT_EOK;
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pulse_encoder = (struct rt_pulse_encoder_device *)dev;
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switch (cmd)
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{
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case PULSE_ENCODER_CMD_CLEAR_COUNT:
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result = pulse_encoder->ops->clear_count(pulse_encoder);
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break;
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case PULSE_ENCODER_CMD_GET_TYPE:
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*(enum rt_pulse_encoder_type *)args = pulse_encoder->type;
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break;
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case PULSE_ENCODER_CMD_ENABLE:
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case PULSE_ENCODER_CMD_DISABLE:
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result = pulse_encoder->ops->control(pulse_encoder, cmd, args);
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break;
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default:
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result = -RT_ENOSYS;
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break;
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}
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return result;
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}
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#ifdef RT_USING_DEVICE_OPS
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const static struct rt_device_ops pulse_encoder_ops =
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{
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rt_pulse_encoder_init,
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rt_pulse_encoder_open,
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rt_pulse_encoder_close,
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rt_pulse_encoder_read,
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RT_NULL,
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rt_pulse_encoder_control
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};
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#endif
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rt_err_t rt_device_pulse_encoder_register(struct rt_pulse_encoder_device *pulse_encoder, const char *name, void *user_data)
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{
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struct rt_device *device;
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RT_ASSERT(pulse_encoder != RT_NULL);
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RT_ASSERT(pulse_encoder->ops != RT_NULL);
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device = &(pulse_encoder->parent);
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device->type = RT_Device_Class_Miscellaneous;
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device->rx_indicate = RT_NULL;
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device->tx_complete = RT_NULL;
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#ifdef RT_USING_DEVICE_OPS
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device->ops = &pulse_encoder_ops;
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#else
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device->init = rt_pulse_encoder_init;
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device->open = rt_pulse_encoder_open;
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device->close = rt_pulse_encoder_close;
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device->read = rt_pulse_encoder_read;
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device->write = RT_NULL;
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device->control = rt_pulse_encoder_control;
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#endif
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device->user_data = user_data;
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return rt_device_register(device, name, RT_DEVICE_FLAG_RDONLY | RT_DEVICE_FLAG_STANDALONE);
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}
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