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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
* Copyright (c) 2022, xiaoxiaolisunny
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-07-11 xiaoxiaolisunny first version
*/
#include <drv_config.h>
#include <board_config.h>
#include "drv_irq.h"
#ifdef RT_USING_WDT
#define LOG_TAG "drv.dwt"
#include <drv_log.h>
struct hc32_wdt_obj
{
rt_watchdog_t watchdog;
stc_wdt_init_t hiwdg;
rt_uint16_t is_start;
};
static struct hc32_wdt_obj hc32_wdt;
static struct rt_watchdog_ops ops;
static rt_err_t wdt_init(rt_watchdog_t *wdt)
{
return RT_EOK;
}
/* timeout(s) = PERI * CKS / PCLK3
16384 * 8192 / 50M = 2.68s
*/
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:
WDT_FeedDog();
break;
/* set watchdog timeout */
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
hc32_wdt.hiwdg.u32CountPeriod = WDT_CNT_PERIOD16384;
if(hc32_wdt.hiwdg.u32RefreshRange > 0xFFFF)
{
LOG_E("wdg set timeout parameter too large, please less than %ds", 0xFFFF);
return -RT_EINVAL;
}
if(hc32_wdt.is_start)
{
if (WDT_Init(&hc32_wdt.hiwdg) != LL_OK)
{
LOG_E("wdg set timeout failed.");
return -RT_ERROR;
}
}
break;
case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
(*((rt_uint32_t*)arg)) = 16384 * 8192 / 50000000;
break;
case RT_DEVICE_CTRL_WDT_START:
if (WDT_Init(&hc32_wdt.hiwdg) != LL_OK)
{
LOG_E("wdt start failed.");
return -RT_ERROR;
}
hc32_wdt.is_start = 1;
break;
default:
LOG_W("This command is not supported.");
return -RT_ERROR;
}
return RT_EOK;
}
int rt_wdt_init(void)
{
hc32_wdt.hiwdg.u32ClockDiv = WDT_CLK_DIV8192;
hc32_wdt.hiwdg.u32CountPeriod = WDT_CNT_PERIOD16384;
hc32_wdt.hiwdg.u32RefreshRange = WDT_RANGE_0TO100PCT;
hc32_wdt.hiwdg.u32LPMCount = WDT_LPM_CNT_STOP;
hc32_wdt.hiwdg.u32ExceptionType = WDT_EXP_TYPE_RST;
hc32_wdt.is_start = 0;
ops.init = &wdt_init;
ops.control = &wdt_control;
hc32_wdt.watchdog.ops = &ops;
/* register watchdog device */
if (rt_hw_watchdog_register(&hc32_wdt.watchdog, "wdt", 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);
#endif
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