105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/*
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* File : console.c
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* This file is part of Device File System in RT-Thread RTOS
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* COPYRIGHT (C) 2004-2011, 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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*/
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#include <rtthread.h>
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struct console_device
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{
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struct rt_device parent;
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rt_device_t device; /* the actual device */
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};
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struct console_device _console;
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/* common device interface */
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static rt_err_t console_init(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_err_t console_open(rt_device_t dev, rt_uint16_t oflag)
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{
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return RT_EOK;
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}
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static rt_err_t console_close(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_size_t console_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
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{
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struct console_device* device;
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device = (struct console_device*)dev;
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RT_ASSERT(device != RT_NULL);
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return rt_device_read(device->device, pos, buffer, size);
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}
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static rt_size_t console_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 console_device* device;
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device = (struct console_device*)dev;
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RT_ASSERT(device != RT_NULL);
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return rt_device_write(device->device, pos, buffer, size);
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}
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static rt_err_t console_control(rt_device_t dev, rt_uint8_t cmd, void *args)
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{
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return rt_device_control(_console.device, cmd, args);
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}
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void rt_console_init(const char* device_name)
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{
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rt_device_t device;
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/* register to device framework */
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device = rt_device_find(device_name);
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if (device != RT_NULL)
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{
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struct console_device* console;
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/* get console device */
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console = &_console;
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rt_memset(console, 0, sizeof(_console));
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/* device initialization */
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console->parent.type = RT_Device_Class_Char;
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/* set device interface */
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console->parent.init = console_init;
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console->parent.open = console_open;
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console->parent.close = console_close;
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console->parent.read = console_read;
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console->parent.write = console_write;
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console->parent.control = console_control;
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console->parent.user_data = RT_NULL;
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console->device = device;
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rt_device_register(&console->parent, "console", RT_DEVICE_FLAG_RDWR);
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}
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}
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