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/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-08-18 ylz0923 first version
* 2021-08-12 chenyingchun optimize wdt_control arg usage
*/
#include <board.h>
#include <rtdevice.h>
#include <nrfx_wdt.h>
#ifdef RT_USING_WDT
struct nrf5x_wdt_obj
{
rt_watchdog_t watchdog;
nrfx_wdt_t wdt;
nrfx_wdt_channel_id ch;
rt_uint16_t is_start;
};
static struct nrf5x_wdt_obj nrf5x_wdt = {
.wdt = NRFX_WDT_INSTANCE(0),
};
static nrfx_wdt_config_t nrf5x_wdt_cfg = NRFX_WDT_DEFAULT_CONFIG;
static struct rt_watchdog_ops ops;
static rt_err_t wdt_init(rt_watchdog_t *wdt)
{
return RT_EOK;
}
static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
{
switch (cmd)
{
/* feed the watchdog */
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
nrfx_wdt_feed(&nrf5x_wdt.wdt);
break;
/* set watchdog timeout */
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
nrf5x_wdt_cfg.reload_value = (*((rt_uint32_t*)arg)) * 1000;
break;
case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
*((rt_uint32_t*)arg) = nrf5x_wdt_cfg.reload_value;
break;
case RT_DEVICE_CTRL_WDT_START:
if (nrf5x_wdt.is_start != 1)
{
nrfx_wdt_init(&nrf5x_wdt.wdt, &nrf5x_wdt_cfg, RT_NULL);
nrfx_wdt_channel_alloc(&nrf5x_wdt.wdt, &nrf5x_wdt.ch);
nrfx_wdt_enable(&nrf5x_wdt.wdt);
nrf5x_wdt.is_start = 1;
}
break;
default:
return -RT_ERROR;
}
return RT_EOK;
}
int rt_wdt_init(void)
{
nrf5x_wdt.is_start = 0;
ops.init = &wdt_init;
ops.control = &wdt_control;
nrf5x_wdt.watchdog.ops = &ops;
/* register watchdog device */
if (rt_hw_watchdog_register(&nrf5x_wdt.watchdog, "wdt", RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
{
return -RT_ERROR;
}
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_wdt_init);
static int wdt_sample(int argc, char *argv[])
{
rt_uint32_t timeout = 2; /* 溢出时间，单位：秒*/
rt_device_t wdt = rt_device_find("wdt");
rt_device_init(wdt);
rt_device_control(wdt, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
rt_device_control(wdt, RT_DEVICE_CTRL_WDT_START, RT_NULL);
}
MSH_CMD_EXPORT(wdt_sample, wdt sample);
#endif /* RT_USING_WDT */
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