1 /*
2 * Copyright (c) 2006-2025, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2020-08-18 ylz0923 first version
9 * 2021-08-12 chenyingchun optimize wdt_control arg usage
10 */
11
12 #include <board.h>
13 #include <rtdevice.h>
14 #include <nrfx_wdt.h>
15
16 #ifdef RT_USING_WDT
17
18 struct nrf5x_wdt_obj
19 {
20 rt_watchdog_t watchdog;
21 nrfx_wdt_t wdt;
22 nrfx_wdt_channel_id ch;
23 rt_uint16_t is_start;
24 };
25 static struct nrf5x_wdt_obj nrf5x_wdt = {
26 .wdt = NRFX_WDT_INSTANCE(0),
27 };
28 static nrfx_wdt_config_t nrf5x_wdt_cfg = NRFX_WDT_DEFAULT_CONFIG;
29 static struct rt_watchdog_ops ops;
30
wdt_init(rt_watchdog_t * wdt)31 static rt_err_t wdt_init(rt_watchdog_t *wdt)
32 {
33 return RT_EOK;
34 }
35
wdt_control(rt_watchdog_t * wdt,int cmd,void * arg)36 static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
37 {
38 switch (cmd)
39 {
40 /* feed the watchdog */
41 case RT_DEVICE_CTRL_WDT_KEEPALIVE:
42 nrfx_wdt_feed(&nrf5x_wdt.wdt);
43 break;
44 /* set watchdog timeout */
45 case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
46 nrf5x_wdt_cfg.reload_value = (*((rt_uint32_t*)arg)) * 1000;
47 break;
48 case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
49 *((rt_uint32_t*)arg) = nrf5x_wdt_cfg.reload_value;
50 break;
51 case RT_DEVICE_CTRL_WDT_START:
52 if (nrf5x_wdt.is_start != 1)
53 {
54 nrfx_wdt_init(&nrf5x_wdt.wdt, &nrf5x_wdt_cfg, RT_NULL);
55 nrfx_wdt_channel_alloc(&nrf5x_wdt.wdt, &nrf5x_wdt.ch);
56 nrfx_wdt_enable(&nrf5x_wdt.wdt);
57 nrf5x_wdt.is_start = 1;
58 }
59 break;
60 default:
61 return -RT_ERROR;
62 }
63 return RT_EOK;
64 }
65
rt_wdt_init(void)66 int rt_wdt_init(void)
67 {
68 nrf5x_wdt.is_start = 0;
69 ops.init = &wdt_init;
70 ops.control = &wdt_control;
71 nrf5x_wdt.watchdog.ops = &ops;
72 /* register watchdog device */
73 if (rt_hw_watchdog_register(&nrf5x_wdt.watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
74 {
75 return -RT_ERROR;
76 }
77 return RT_EOK;
78 }
79 INIT_BOARD_EXPORT(rt_wdt_init);
80
wdt_sample(int argc,char * argv[])81 static int wdt_sample(int argc, char *argv[])
82 {
83 rt_uint32_t timeout = 2; /* 溢出时间，单位：秒*/
84 rt_device_t wdt = rt_device_find("wdt");
85 rt_device_init(wdt);
86 rt_device_control(wdt, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
87 rt_device_control(wdt, RT_DEVICE_CTRL_WDT_START, RT_NULL);
88 }
89 MSH_CMD_EXPORT(wdt_sample, wdt sample);
90
91 #endif /* RT_USING_WDT */
92
93