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bsp/ls1cdev/drivers/hw_i2c.c

-/*
- * File      :hw_i2c.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Change Logs:
- * Date           Author       	Notes
- * 2018-01-04     Sundm75        the first version
- */
-
-#include <rtthread.h>
-#include <rtdevice.h>
-#include "ls1c_i2c.h"  
-
-struct ls1c_i2c_bus
-{
-    struct rt_i2c_bus_device parent;
-    rt_uint32_t u32Module;
-};
-
-rt_size_t rt_i2c_master_xfer(struct rt_i2c_bus_device *bus,
-                          struct rt_i2c_msg         *msgs,
-                          rt_uint32_t               num)
-{
-    struct ls1c_i2c_bus * i2c_bus = (struct ls1c_i2c_bus *)bus;
-	ls1c_i2c_info_t i2c_info;  
-    struct rt_i2c_msg *msg;
-    int i;
-    rt_int32_t ret = RT_EOK;
-    i2c_info.clock = 50000;       // 50kb/s  
-	i2c_info.I2Cx  = i2c_bus->u32Module;
-	i2c_init(&i2c_info);
-	
-    for (i = 0; i < num; i++)
-    {
-        msg = &msgs[i];
-        if (msg->flags == RT_I2C_RD)
-        {
-			i2c_send_start_and_addr(&i2c_info, msg->addr, LS1C_I2C_DIRECTION_READ);  
-			i2c_receive_ack(&i2c_info); 
-			i2c_receive_data(&i2c_info, (rt_uint8_t *)msg->buf, msg->len);  
-			i2c_send_stop(&i2c_info);   
-		 }
-        else if(msg->flags == RT_I2C_WR)
-        {
-			i2c_send_start_and_addr(&i2c_info, msg->addr, LS1C_I2C_DIRECTION_WRITE);  
-			i2c_receive_ack(&i2c_info);  
-			i2c_send_data(&i2c_info, (rt_uint8_t *)msg->buf, msg->len);  
-			i2c_send_stop(&i2c_info);  
-		}
-        ret++;
-    }
-    return ret;
-}
-
-rt_err_t rt_i2c_bus_control(struct rt_i2c_bus_device *bus,
-                          rt_uint32_t               cmd,
-                          rt_uint32_t               arg)
-{
-    struct ls1c_i2c_bus * i2c_bus = (struct ls1c_i2c_bus *)bus;
-
-    RT_ASSERT(bus != RT_NULL);
-    i2c_bus = (struct ls1c_i2c_bus *)bus->parent.user_data;
-
-    RT_ASSERT(i2c_bus != RT_NULL);
-
-    switch (cmd)
-    {
-        case RT_DEVICE_CTRL_CONFIG :
-            break;
-    }
-
-    return RT_EOK;
-}
-
-static const struct rt_i2c_bus_device_ops ls1c_i2c_ops =
-{
-    rt_i2c_master_xfer,
-    RT_NULL,
-    rt_i2c_bus_control
-};
-
-
-#ifdef RT_USING_I2C0
-static struct ls1c_i2c_bus ls1c_i2c_bus_0 = 
-{
-    {1},
-    LS1C_I2C_0,
-};
-#endif
-
-#ifdef RT_USING_I2C1
-static struct ls1c_i2c_bus ls1c_i2c_bus_1 = 
-{
-    {1},
-    LS1C_I2C_1,
-};
-#endif
-
-#ifdef RT_USING_I2C2
-static struct ls1c_i2c_bus ls1c_i2c_bus_2 = 
-{
-    {1},
-    LS1C_I2C_2,
-};
-#endif
-
-int rt_i2c_init(void)
-{
-    struct ls1c_i2c_bus* ls1c_i2c;
-
-#ifdef RT_USING_I2C0
-    ls1c_i2c = &ls1c_i2c_bus_0;
-    ls1c_i2c->parent.ops = &ls1c_i2c_ops;
-    rt_i2c_bus_device_register(&ls1c_i2c->parent, "i2c0");
-    rt_kprintf("i2c0_init!\n");
-#endif
-#ifdef RT_USING_I2C1
-    ls1c_i2c = &ls1c_i2c_bus_1;
-    ls1c_i2c->parent.ops = &ls1c_i2c_ops;
-    rt_i2c_bus_device_register(&ls1c_i2c->parent, "i2c1");
-    rt_kprintf("i2c1_init!\n");
-#endif
-
-#ifdef RT_USING_I2C2
-    ls1c_i2c = &ls1c_i2c_bus_2;
-    ls1c_i2c->parent.ops = &ls1c_i2c_ops;
-    rt_i2c_bus_device_register(&ls1c_i2c->parent, "i2c2");
-    rt_kprintf("i2c2_init!\n");
-#endif
-
-    return RT_EOK;
-}

bsp/ls1cdev/drivers/hw_i2c.h

-/*
- * File      : hw_i2c.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Change Logs:
- * Date           Author       Notes
- * 2018-01-04     Sundm75        the first version
- */
-
-#ifndef LS1C_I2C_H
-#define LS1C_I2C_H
-
-#include <rtthread.h>
-
-int rt_i2c_init(void);
-
-#endif