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/*
* File : drv_iwg.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2015, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2017-11-08 ZYH the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#ifdef RT_USING_WDT
IWDG_HandleTypeDef hiwdg;
static rt_err_t drv_init(rt_watchdog_t *wdt)
{
hiwdg.Instance = IWDG;
hiwdg.Init.Prescaler = IWDG_PRESCALER_16; //1s
hiwdg.Init.Reload = 4095;
if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
{
RT_ASSERT(0);
}
return RT_EOK;
}
static rt_err_t drv_control(rt_watchdog_t *wdt, int cmd, void *arg)
{
switch (cmd)
{
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
hiwdg.Init.Reload = (rt_uint32_t)arg;
if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
{
return RT_ERROR;
}
break;
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
HAL_IWDG_Refresh(&hiwdg);
break;
default:
return RT_ERROR;
}
return RT_EOK;
}
static struct rt_watchdog_ops _ops =
{
drv_init,
drv_control
};
static rt_watchdog_t _iwg =
{
.ops = &_ops
};
int rt_iwg_init(void)
{
return rt_hw_watchdog_register(&_iwg, "iwg", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL);
}
INIT_BOARD_EXPORT(rt_iwg_init);
#endif
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