/* * 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 <rtthread.h> #include "board.h" #include <rtdevice.h> #include <rthw.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) { while (1) { } } 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