84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
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* Copyright (c) 2006-2022, 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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* 2018-09-25 misonyo first edition.
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*/
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/*
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* 程序清单：这是一个独立看门狗设备使用例程
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* 例程导出了 iwdg_sample 命令到控制终端
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* 命令调用格式：iwdg_sample iwg
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* 命令解释：命令第二个参数是要使用的看门狗设备名称，为空则使用例程默认的看门狗设备。
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* 程序功能：程序通过设备名称查找看门狗设备，然后初始化设备并设置看门狗设备溢出时间。
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* 然后设置空闲线程回调函数，在回调函数里会喂狗。
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#define IWDG_DEVICE_NAME "wdt" /* 看门狗设备名称 */
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static rt_device_t wdg_dev; /* 看门狗设备句柄 */
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static void idle_hook(void)
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{
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/* 在空闲线程的回调函数里喂狗 */
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rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, NULL);
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// rt_kprintf("feed the dog!\n ");
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}
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static int iwdg_sample(int argc, char *argv[])
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{
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rt_err_t ret = RT_EOK;
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rt_uint32_t timeout = 10; /* 溢出时间 10 秒 */
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char device_name[RT_NAME_MAX];
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/* 判断命令行参数是否给定了设备名称 */
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if (argc == 2)
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{
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rt_strncpy(device_name, argv[1], RT_NAME_MAX);
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}
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else
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{
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rt_strncpy(device_name, IWDG_DEVICE_NAME, RT_NAME_MAX);
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}
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/* 根据设备名称查找看门狗设备，获取设备句柄 */
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wdg_dev = rt_device_find(device_name);
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if (!wdg_dev)
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{
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rt_kprintf("find %s failed!\n", device_name);
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return -RT_ERROR;
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}
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/* 初始化设备 */
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ret = rt_device_init(wdg_dev);
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if (ret != RT_EOK)
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{
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rt_kprintf("initialize %s failed!\n", device_name);
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return -RT_ERROR;
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}
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/* 设置看门狗溢出时间 */
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ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
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if (ret != RT_EOK)
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{
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rt_kprintf("set %s timeout failed!\n", device_name);
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return -RT_ERROR;
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}
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ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
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if (ret != RT_EOK)
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{
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rt_kprintf("start %s failed!\n", device_name);
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return -RT_ERROR;
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}
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/* 设置空闲线程回调函数 */
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rt_thread_idle_sethook(idle_hook);
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return ret;
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}
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/* 导出到 msh 命令列表中 */
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//MSH_CMD_EXPORT(iwdg_sample, iwdg sample);
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/* 导出到自动初始化 */
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//INIT_DEVICE_EXPORT(iwdg_sample);
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