1 /*
2 * Copyright (c) 2022-2024, Xiaohua Semiconductor Co., Ltd.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2024-12-30 CDT first version
9 */
10
11 /*
12 * 程序清单：这是 WDT 设备使用例程
13 * 例程导出了 wdt_sample 命令到控制终端。
14 * 命令调用格式：wdt_sample set_timeout x
15 * 命令解释：x 对应的是超时时间，以实际计算的接近值为准
16 * 终端先打印N次设置的超时，然后依次递减等待N秒后复位系统(N等于设置的超时秒数)
17 */
18
19 #include <rtthread.h>
20 #include <rtdevice.h>
21 #include <stdlib.h>
22
23 #ifdef BSP_USING_WDT_TMR
24
25 #if defined(BSP_USING_WDT)
26 #define WDT_DEVICE_NAME "wdt"
27 #elif defined(BSP_USING_SWDT)
28 #define WDT_DEVICE_NAME "swdt"
29 #endif
30
31 static rt_device_t wdg_dev;
32 static rt_uint32_t valid_timeout = 0;
33 static rt_uint32_t wdt_cnt = 0;
34
idle_hook(void)35 static void idle_hook(void)
36 {
37 if (wdt_cnt < valid_timeout)
38 {
39 /* Feed watch dog */
40 rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, NULL);
41 }
42 }
43
_wdt_cmd_print_usage(void)44 static void _wdt_cmd_print_usage(void)
45 {
46 rt_kprintf("wdt_sample [option]\n");
47 rt_kprintf(" set_timeout: set wdt timeout(S)\n");
48 rt_kprintf(" e.g. MSH >wdt_sample set_timeout 10\n");
49 }
50
wdt_sample(int argc,char * argv[])51 static int wdt_sample(int argc, char *argv[])
52 {
53 rt_err_t ret = RT_EOK;
54 rt_uint32_t timeleft;
55 rt_uint32_t timeout = atoi(argv[2]);
56
57 if (argc != 3)
58 {
59 _wdt_cmd_print_usage();
60 return -RT_ERROR;
61 }
62
63 if (!rt_strcmp("set_timeout", argv[1]))
64 {
65 wdg_dev = rt_device_find(WDT_DEVICE_NAME);
66 if (!wdg_dev)
67 {
68 rt_kprintf("find %s failed!\n", WDT_DEVICE_NAME);
69 return -RT_ERROR;
70 }
71
72 ret = rt_device_init(wdg_dev);
73 if (ret != RT_EOK)
74 {
75 rt_kprintf("init %s failed!\n", WDT_DEVICE_NAME);
76 return -RT_ERROR;
77 }
78
79 /* Set timeout (Unit:S) */
80 ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
81 if (ret != RT_EOK)
82 {
83 rt_kprintf("set %s timeout failed!\n", WDT_DEVICE_NAME);
84 return -RT_ERROR;
85 }
86
87 /* Get the time when it real effective */
88 ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_GET_TIMEOUT, &valid_timeout);
89 if (ret != RT_EOK)
90 {
91 rt_kprintf("start %s failed!\n", WDT_DEVICE_NAME);
92 return -RT_ERROR;
93 }
94 rt_kprintf("valid_timeout = %d S\n", valid_timeout);
95
96 /* Start WDT */
97 ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
98 if (ret != RT_EOK)
99 {
100 rt_kprintf("start %s failed!\n", WDT_DEVICE_NAME);
101 return -RT_ERROR;
102 }
103
104 rt_thread_idle_sethook(idle_hook);
105
106 for (;;)
107 {
108 rt_thread_mdelay(1000);
109 rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_GET_TIMELEFT, &timeleft);
110 rt_kprintf("timeleft = %d S\n", timeleft);
111 wdt_cnt++;
112 }
113 }
114 else
115 {
116 _wdt_cmd_print_usage();
117 return -RT_ERROR;
118 }
119
120 return ret;
121 }
122
123 MSH_CMD_EXPORT(wdt_sample, wdt_sample [option]);
124
125 #endif
126