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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-12-07 balanceTWK first version
*/
#include <board.h>
#ifdef RT_USING_WDT
//#define DRV_DEBUG
#define LOG_TAG "drv.wdt"
#include <drv_log.h>
static IWDG_HandleTypeDef hiwdg;
static struct rt_watchdog_ops ops;
static rt_watchdog_t watchdog;
static rt_err_t wdt_init(rt_watchdog_t *wdt)
{
hiwdg.Instance = IWDG;
hiwdg.Init.Prescaler = IWDG_PRESCALER_32;
hiwdg.Init.Reload = 0x00000FFE;
#if defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F7)
hiwdg.Init.Window = 0x00000FFF;
#endif
if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
{
LOG_E("wdt init failed.");
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
{
switch (cmd)
{
/* feed the watchdog */
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
HAL_IWDG_Refresh(&hiwdg);
break;
/* set watchdog timeout */
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
hiwdg.Init.Reload = *((rt_uint32_t*)arg);
if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
{
LOG_E("wdg set timeout failed.");
return -RT_ERROR;
}
break;
default:
return -RT_ERROR;
}
return RT_EOK;
}
int rt_wdt_init(void)
{
ops.init = &wdt_init;
ops.control = &wdt_control;
watchdog.ops = &ops;
/* register watchdog device */
if (rt_hw_watchdog_register(&watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
{
LOG_E("wdt device register failed.");
return -RT_ERROR;
}
LOG_D("wdt device register success.");
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_wdt_init);
#endif /* RT_USING_WDT */
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