169 lines
4.4 KiB
C
169 lines
4.4 KiB
C
/*
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* Copyright (c) 2006-2018, 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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* 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, int 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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#ifdef RT_USING_DEVICE_OPS
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const static struct rt_device_ops pin_ops =
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{
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RT_NULL,
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RT_NULL,
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RT_NULL,
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_pin_read,
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_pin_write,
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_pin_control
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};
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#endif
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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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#ifdef RT_USING_DEVICE_OPS
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_hw_pin.parent.ops = &pin_ops;
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#else
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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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#endif
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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, name, RT_DEVICE_FLAG_RDWR);
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return 0;
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}
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rt_err_t rt_pin_attach_irq(rt_int32_t pin, rt_uint32_t mode,
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void (*hdr)(void *args), void *args)
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{
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RT_ASSERT(_hw_pin.ops != RT_NULL);
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if(_hw_pin.ops->pin_attach_irq)
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{
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return _hw_pin.ops->pin_attach_irq(&_hw_pin.parent, pin, mode, hdr, args);
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}
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return RT_ENOSYS;
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}
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rt_err_t rt_pin_detach_irq(rt_int32_t pin)
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{
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RT_ASSERT(_hw_pin.ops != RT_NULL);
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if(_hw_pin.ops->pin_detach_irq)
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{
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return _hw_pin.ops->pin_detach_irq(&_hw_pin.parent, pin);
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}
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return RT_ENOSYS;
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}
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rt_err_t rt_pin_irq_enable(rt_base_t pin, rt_uint32_t enabled)
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{
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RT_ASSERT(_hw_pin.ops != RT_NULL);
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if(_hw_pin.ops->pin_irq_enable)
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{
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return _hw_pin.ops->pin_irq_enable(&_hw_pin.parent, pin, enabled);
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}
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return RT_ENOSYS;
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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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RT_ASSERT(_hw_pin.ops != RT_NULL);
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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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RT_ASSERT(_hw_pin.ops != RT_NULL);
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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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RT_ASSERT(_hw_pin.ops != RT_NULL);
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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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rt_base_t rt_pin_get(const char *name)
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{
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RT_ASSERT(_hw_pin.ops != RT_NULL);
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RT_ASSERT(name[0] == 'P');
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if(_hw_pin.ops->pin_get == RT_NULL)
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{
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return -RT_ENOSYS;
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}
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return _hw_pin.ops->pin_get(name);
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}
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FINSH_FUNCTION_EXPORT_ALIAS(rt_pin_get, pinGet, get pin number from hardware pin);
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