163 lines
3.7 KiB
C
163 lines
3.7 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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* 2018-01-04 Sundm75 the first version
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include "ls1c_i2c.h"
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#include "../libraries/ls1c_pin.h"
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#ifdef RT_USING_I2C
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struct ls1c_i2c_bus
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{
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struct rt_i2c_bus_device parent;
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rt_uint32_t u32Module;
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};
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rt_size_t rt_i2c_master_xfer(struct rt_i2c_bus_device *bus,
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struct rt_i2c_msg *msgs,
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rt_uint32_t num)
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{
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struct ls1c_i2c_bus * i2c_bus = (struct ls1c_i2c_bus *)bus;
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ls1c_i2c_info_t i2c_info;
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struct rt_i2c_msg *msg;
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int i;
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rt_int32_t ret = RT_EOK;
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i2c_info.clock = 50000; // 50kb/s
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i2c_info.I2Cx = i2c_bus->u32Module;
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i2c_init(&i2c_info);
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for (i = 0; i < num; i++)
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{
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msg = &msgs[i];
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if (msg->flags == RT_I2C_RD)
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{
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i2c_send_start_and_addr(&i2c_info, msg->addr, LS1C_I2C_DIRECTION_READ);
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i2c_receive_ack(&i2c_info);
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i2c_receive_data(&i2c_info, (rt_uint8_t *)msg->buf, msg->len);
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i2c_send_stop(&i2c_info);
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}
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else if(msg->flags == RT_I2C_WR)
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{
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i2c_send_start_and_addr(&i2c_info, msg->addr, LS1C_I2C_DIRECTION_WRITE);
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i2c_receive_ack(&i2c_info);
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i2c_send_data(&i2c_info, (rt_uint8_t *)msg->buf, msg->len);
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i2c_send_stop(&i2c_info);
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}
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ret++;
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}
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return ret;
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}
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rt_err_t rt_i2c_bus_control(struct rt_i2c_bus_device *bus,
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rt_uint32_t cmd,
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rt_uint32_t arg)
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{
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struct ls1c_i2c_bus * i2c_bus = (struct ls1c_i2c_bus *)bus;
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RT_ASSERT(bus != RT_NULL);
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i2c_bus = (struct ls1c_i2c_bus *)bus->parent.user_data;
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RT_ASSERT(i2c_bus != RT_NULL);
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CONFIG :
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break;
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}
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return RT_EOK;
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}
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static const struct rt_i2c_bus_device_ops ls1c_i2c_ops =
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{
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rt_i2c_master_xfer,
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RT_NULL,
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rt_i2c_bus_control
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};
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#ifdef RT_USING_I2C0
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static struct ls1c_i2c_bus ls1c_i2c_bus_0 =
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{
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{1},
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LS1C_I2C_0,
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};
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#endif
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#ifdef RT_USING_I2C1
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static struct ls1c_i2c_bus ls1c_i2c_bus_1 =
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{
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{1},
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LS1C_I2C_1,
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};
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#endif
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#ifdef RT_USING_I2C2
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static struct ls1c_i2c_bus ls1c_i2c_bus_2 =
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{
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{1},
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LS1C_I2C_2,
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};
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#endif
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int ls1c_hw_i2c_init(void)
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{
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struct ls1c_i2c_bus* ls1c_i2c;
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#ifdef RT_USING_I2C0
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/*
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pin_set_purpose(2, PIN_PURPOSE_OTHER);
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pin_set_purpose(3, PIN_PURPOSE_OTHER);
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pin_set_remap(2, PIN_REMAP_SECOND);
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pin_set_remap(3, PIN_REMAP_SECOND);
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*/
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#endif
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#ifdef RT_USING_I2C1
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pin_set_purpose(2, PIN_PURPOSE_OTHER);
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pin_set_purpose(3, PIN_PURPOSE_OTHER);
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pin_set_remap(2, PIN_REMAP_SECOND);
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pin_set_remap(3, PIN_REMAP_SECOND);
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#endif
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#ifdef RT_USING_I2C2
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pin_set_purpose(51, PIN_PURPOSE_OTHER);
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pin_set_purpose(50, PIN_PURPOSE_OTHER);
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pin_set_remap(51, PIN_REMAP_FOURTH);
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pin_set_remap(50, PIN_REMAP_FOURTH);
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#endif
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#ifdef RT_USING_I2C0
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ls1c_i2c = &ls1c_i2c_bus_0;
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ls1c_i2c->parent.ops = &ls1c_i2c_ops;
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rt_i2c_bus_device_register(&ls1c_i2c->parent, "i2c0");
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rt_kprintf("i2c0_init!\n");
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#endif
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#ifdef RT_USING_I2C1
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ls1c_i2c = &ls1c_i2c_bus_1;
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ls1c_i2c->parent.ops = &ls1c_i2c_ops;
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rt_i2c_bus_device_register(&ls1c_i2c->parent, "i2c1");
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rt_kprintf("i2c1_init!\n");
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#endif
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#ifdef RT_USING_I2C2
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ls1c_i2c = &ls1c_i2c_bus_2;
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ls1c_i2c->parent.ops = &ls1c_i2c_ops;
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rt_i2c_bus_device_register(&ls1c_i2c->parent, "i2c2");
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rt_kprintf("i2c2_init!\n");
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#endif
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return RT_EOK;
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}
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INIT_BOARD_EXPORT(ls1c_hw_i2c_init);
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#endif
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