rt-thread-official/bsp/stm32/stm32f767-atk-apollo/board/ports/phy_reset.c

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/*
2021-03-14 15:33:55 +08:00
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-11-21 SummerGift add port file
*/
#include <rtthread.h>
#include "pcf8574.h"
//#define DRV_DEBUG
#define LOG_TAG "drv.pcf8574_port"
#include <drv_log.h>
#define ETH_RESET_IO 7 //PHY RESET PIN
#define I2C_BUS_NAME "i2c2"
#define PCF8574_ADDR 0x20
/* pcf8574 hardware init */
pcf8574_device_t pcf8574_hw_init(char * dev_name, int addr)
{
static pcf8574_device_t dev;
if (dev == RT_NULL)
{
dev = pcf8574_init(dev_name, addr);
if (dev == RT_NULL)
{
LOG_E("i2c_bus %s for PCF8574 not found!", dev_name);
return RT_NULL;
} else {
return dev;
}
} else
{
return dev;
}
}
/* phy reset */
void phy_reset(void)
{
pcf8574_device_t dev = pcf8574_hw_init(I2C_BUS_NAME, PCF8574_ADDR);
if (dev == RT_NULL)
{
LOG_E("can't get pcf8574 device");
return;
}
pcf8574_pin_write(dev, ETH_RESET_IO, 1);
rt_thread_mdelay(100);
pcf8574_pin_write(dev, ETH_RESET_IO, 0);
rt_thread_mdelay(100);
}