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/*
* Copyright (c) 2006-2026, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2026-02-04 Yixizhang first version
*/
#include <board.h>
#include <rtthread.h>
#ifdef RT_USING_WDT
#if defined(BSP_USING_FWDT)
#define HW_WDGT_DEV_NAME "fwdgt"
#elif defined(BSP_USING_WWDT)
#define HW_WDGT_DEV_NAME "wwdgt"
#endif
#define DBG_TAG "wdt"
#define DBG_LVL DBG_LOG
#include <rtdbg.h>
struct gd32_wdt_obj
{
rt_watchdog_t watchdog;
rt_uint16_t is_start;
};
static struct gd32_wdt_obj gd32_wdt;
static struct rt_watchdog_ops ops;
static rt_err_t wdt_init(rt_watchdog_t *wdt)
{
LOG_D("wdt init success.");
return RT_EOK;
}
static rt_err_t wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
{
rt_uint32_t time_sec;
rt_uint32_t time_msec;
rt_uint32_t wdgt_count;
rt_uint32_t window_value;
switch (cmd)
{
/* feed the watchdog */
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
#if defined(BSP_USING_FWDT)
fwdgt_counter_reload();
#elif defined(BSP_USING_WWDT)
wwdgt_counter_update(0x70);
LOG_D("wdt update success.");
#endif
break;
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
#if defined(BSP_USING_FWDT)
/* set timeout sec*/
time_sec = *(rt_uint32_t*)arg;
wdgt_count = 32*1000/32*time_sec;
ErrStatus res = fwdgt_prescaler_value_config(FWDGT_PSC_DIV32);
res = fwdgt_reload_value_config(wdgt_count);
LOG_D("timeout=%d sec,count=%d res=%d ", time_sec, wdgt_count, res);
#elif defined(BSP_USING_WWDT)
/* set timeout ms */
window_value = 0x7F;
time_msec = *(rt_uint32_t*)arg;
wdgt_count = (rt_uint32_t)((float)((float)1/0.78)*time_msec) + 0x3F;
wwdgt_config(wdgt_count, window_value, WWDGT_CFG_PSC_DIV8);
LOG_D("timeout=%d msec,count=%d ", time_msec, wdgt_count);
#endif
break;
case RT_DEVICE_CTRL_WDT_START:
#if defined(BSP_USING_FWDT)
fwdgt_enable();
#elif defined(BSP_USING_WWDT)
wwdgt_enable();
#endif
LOG_D("wdt control enable success.");
break;
default:
LOG_W("This command is not supported.");
return -RT_ERROR;
}
return RT_EOK;
}
int rt_wdt_init(void)
{
rcu_periph_clock_enable(RCU_WWDGT);
gd32_wdt.is_start = 0;
ops.init = &wdt_init;
ops.control = &wdt_control;
gd32_wdt.watchdog.ops = &ops;
/* register watchdog device */
if (rt_hw_watchdog_register(&gd32_wdt.watchdog, HW_WDGT_DEV_NAME, RT_DEVICE_FLAG_DEACTIVATE, RT_NULL) != RT_EOK)
{
LOG_E("wdt device register failed.");
return -RT_ERROR;
}
LOG_D(" wdt device register success.");
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_wdt_init);
#if defined(BSP_USING_FWDT)
int fwdt_test_sample()
{
rt_err_t ret = RT_EOK;
rt_device_t hw_dev = RT_NULL;
rt_ubase_t time_out_sec = 4;
hw_dev = rt_device_find(HW_WDGT_DEV_NAME);
LOG_D("find fwdt device success,device=%x",hw_dev);
if (hw_dev == RT_NULL)
{
LOG_D("fwdt sample run failed! can't find %s device!", HW_WDGT_DEV_NAME);
return -RT_ERROR;
}
ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
LOG_D("open fwdt device success");
if (ret != RT_EOK)
{
LOG_D("open %s device failed!", HW_WDGT_DEV_NAME);
return ret;
}
ret = rt_device_control(hw_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &time_out_sec);
if (ret != RT_EOK)
{
LOG_D("control %s device failed!", HW_WDGT_DEV_NAME);
return ret;
}
rt_device_control(hw_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
rt_device_control(hw_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, RT_NULL);
return ret;
}
MSH_CMD_EXPORT(fwdt_test_sample, fwdt timeout 4 sec reset)
#elif defined(BSP_USING_WWDT)
int wwdt_test_sample()
{
rt_err_t ret = RT_EOK;
rt_device_t hw_dev = RT_NULL;
rt_ubase_t time_out_msec = 40;
hw_dev = rt_device_find(HW_WDGT_DEV_NAME);
LOG_D("find wwdt device success,device=%x",hw_dev);
if (hw_dev == RT_NULL)
{
LOG_D("wwdt sample run failed! can't find %s device!", HW_WDGT_DEV_NAME);
return -RT_ERROR;
}
ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
LOG_D("open wwdt device success");
if (ret != RT_EOK)
{
LOG_D("open %s device failed!", HW_WDGT_DEV_NAME);
return ret;
}
ret = rt_device_control(hw_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &time_out_msec);
if (ret != RT_EOK)
{
LOG_D("control %s device failed!", HW_WDGT_DEV_NAME);
return ret;
}
rt_device_control(hw_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
rt_device_control(hw_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, RT_NULL);
return ret;
}
MSH_CMD_EXPORT(wwdt_test_sample, wwdt timeout 40 msec reset)
#endif
#endif /* RT_USING_WDT */
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