142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2019-03-19 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
|