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/*
* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-01-24 wangyq the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "drv_i2c.h"
#include <ald_i2c.h>
#include <ald_gpio.h>
#ifdef RT_USING_I2C
#define TIMEOUT 0x0FFF
/* I2C struct definition */
static i2c_handle_t _h_i2c0, _h_i2c1;
static void _i2c_init(void)
{
gpio_init_t gpio_instruct;
/* Initialize I2C Pin */
gpio_instruct.mode = GPIO_MODE_OUTPUT;
gpio_instruct.odos = GPIO_PUSH_PULL;
gpio_instruct.pupd = GPIO_PUSH_UP;
gpio_instruct.odrv = GPIO_OUT_DRIVE_NORMAL;
gpio_instruct.flt = GPIO_FILTER_DISABLE;
gpio_instruct.type = GPIO_TYPE_CMOS;
gpio_instruct.func = GPIO_FUNC_5;
#ifdef BSP_USING_I2C0
/* Initialize I2C Function */
_h_i2c0.perh = I2C0;
_h_i2c0.init.clk_speed = 100000;
_h_i2c0.init.duty = I2C_DUTYCYCLE_2;
_h_i2c0.init.own_addr1 = 0x0A;
_h_i2c0.init.addr_mode = I2C_ADDR_7BIT;
_h_i2c0.init.general_call = I2C_GENERALCALL_DISABLE;
_h_i2c0.init.no_stretch = I2C_NOSTRETCH_ENABLE;
i2c_reset(&_h_i2c0);
i2c_init(&_h_i2c0);
/* I2C0_SCL->PB8, I2C0_SDA->PB9 */
gpio_init(GPIOB, GPIO_PIN_8 | GPIO_PIN_9, &gpio_instruct);
#endif
#ifdef BSP_USING_I2C1
/* Initialize i2c function */
_h_i2c1.perh = I2C1;
_h_i2c1.init.clk_speed = 100000;
_h_i2c1.init.duty = I2C_DUTYCYCLE_2;
_h_i2c1.init.own_addr1 = 0xA0;
_h_i2c1.init.addr_mode = I2C_ADDR_7BIT;
_h_i2c1.init.general_call = I2C_GENERALCALL_DISABLE;
_h_i2c1.init.no_stretch = I2C_NOSTRETCH_ENABLE;
i2c_reset(&_h_i2c1);
i2c_init(&_h_i2c1);
/* I2C1_SCL->PB10, I2C1_SDA->PB11 */
gpio_init(GPIOB, GPIO_PIN_10 | GPIO_PIN_11, &gpio_instruct);
#endif
}
static rt_size_t es32f0_master_xfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num)
{
struct rt_i2c_msg *msg;
rt_uint32_t i;
rt_err_t ret = RT_ERROR;
for (i = 0; i < num; i++)
{
msg = &msgs[i];
if (msg->flags & RT_I2C_RD)
{
if (i2c_master_recv(bus->priv, msg->addr << 1, msg->buf, msg->len, TIMEOUT) != 0)
{
i2c_dbg("i2c bus write failed,i2c bus stop!\n");
goto out;
}
}
else
{
if (i2c_master_send(bus->priv, msg->addr << 1, msg->buf, msg->len, TIMEOUT) != 0)
{
i2c_dbg("i2c bus write failed,i2c bus stop!\n");
goto out;
}
}
}
ret = i;
out:
i2c_dbg("send stop condition\n");
return ret;
}
const struct rt_i2c_bus_device_ops es32f0_i2c_ops =
{
es32f0_master_xfer,
RT_NULL,
RT_NULL,
};
int rt_hw_i2c_init(void)
{
_i2c_init();
#ifdef BSP_USING_I2C0
/* define i2c Instance */
static struct rt_i2c_bus_device _i2c_device0;
rt_memset((void *)&_i2c_device0, 0, sizeof(struct rt_i2c_bus_device));
_i2c_device0.ops = &es32f0_i2c_ops;
_i2c_device0.priv = &_h_i2c0;
rt_i2c_bus_device_register(&_i2c_device0, "i2c0");
#endif
#ifdef BSP_USING_I2C1
/* define i2c Instance */
static struct rt_i2c_bus_device _i2c_device1;
rt_memset((void *)&_i2c_device1, 0, sizeof(struct rt_i2c_bus_device));
_i2c_device1.ops = &es32f0_i2c_ops;
_i2c_device1.priv = &_h_i2c1;
rt_i2c_bus_device_register(&_i2c_device1, "i2c1");
#endif
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_i2c_init);
#endif
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