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