177 lines
4.4 KiB
C
177 lines
4.4 KiB
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"
|
|
#include "../libraries/ls1c_pin.h"
|
|
|
|
#ifdef RT_USING_I2C
|
|
|
|
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 ls1c_hw_i2c_init(void)
|
|
{
|
|
struct ls1c_i2c_bus* ls1c_i2c;
|
|
|
|
#ifdef RT_USING_I2C0
|
|
/*
|
|
pin_set_purpose(2, PIN_PURPOSE_OTHER);
|
|
pin_set_purpose(3, PIN_PURPOSE_OTHER);
|
|
pin_set_remap(2, PIN_REMAP_SECOND);
|
|
pin_set_remap(3, PIN_REMAP_SECOND);
|
|
*/
|
|
#endif
|
|
#ifdef RT_USING_I2C1
|
|
pin_set_purpose(2, PIN_PURPOSE_OTHER);
|
|
pin_set_purpose(3, PIN_PURPOSE_OTHER);
|
|
pin_set_remap(2, PIN_REMAP_SECOND);
|
|
pin_set_remap(3, PIN_REMAP_SECOND);
|
|
#endif
|
|
#ifdef RT_USING_I2C2
|
|
pin_set_purpose(51, PIN_PURPOSE_OTHER);
|
|
pin_set_purpose(50, PIN_PURPOSE_OTHER);
|
|
pin_set_remap(51, PIN_REMAP_FOURTH);
|
|
pin_set_remap(50, PIN_REMAP_FOURTH);
|
|
#endif
|
|
|
|
|
|
#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;
|
|
}
|
|
|
|
INIT_BOARD_EXPORT(ls1c_hw_i2c_init);
|
|
|
|
#endif
|