140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2021-08-10 charlown first version
|
|
*/
|
|
|
|
#include <rtthread.h>
|
|
#include <rtdevice.h>
|
|
#include <board.h>
|
|
#include "ch32f10x_iwdg.h"
|
|
|
|
#ifdef BSP_USING_IWDT
|
|
|
|
#define LOG_TAG "drv.wdt"
|
|
#include "drv_log.h"
|
|
|
|
struct watchdog_device
|
|
{
|
|
rt_watchdog_t parent;
|
|
IWDG_TypeDef *instance;
|
|
rt_uint32_t Prescaler;
|
|
rt_uint32_t Reload;
|
|
rt_uint16_t is_start;
|
|
};
|
|
static struct watchdog_device watchdog_dev;
|
|
|
|
static rt_err_t ch32_wdt_init(rt_watchdog_t *wdt)
|
|
{
|
|
return RT_EOK;
|
|
}
|
|
|
|
static rt_err_t ch32_wdt_control(rt_watchdog_t *wdt, int cmd, void *arg)
|
|
{
|
|
|
|
struct watchdog_device *wdt_dev;
|
|
|
|
wdt_dev = (struct watchdog_device *)wdt;
|
|
|
|
switch (cmd)
|
|
{
|
|
/* feed the watchdog */
|
|
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
|
|
|
|
IWDG_ReloadCounter();
|
|
|
|
break;
|
|
/* set watchdog timeout */
|
|
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
|
|
|
|
#if defined(LSI_VALUE)
|
|
if (LSI_VALUE)
|
|
{
|
|
wdt_dev->Reload = (*((rt_uint32_t *)arg)) * LSI_VALUE / 256;
|
|
}
|
|
else
|
|
{
|
|
LOG_E("Please define the value of LSI_VALUE!");
|
|
}
|
|
if (wdt_dev->Reload > 0xFFF)
|
|
{
|
|
LOG_E("wdg set timeout parameter too large, please less than %ds", 0xFFF * 256 / LSI_VALUE);
|
|
return -RT_EINVAL;
|
|
}
|
|
#else
|
|
#error "Please define the value of LSI_VALUE!"
|
|
#endif
|
|
if (wdt_dev->is_start)
|
|
{
|
|
IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
|
|
IWDG_SetPrescaler(wdt_dev->Prescaler);
|
|
IWDG_SetReload(wdt_dev->Reload);
|
|
IWDG_WriteAccessCmd(IWDG_WriteAccess_Disable);
|
|
IWDG_Enable();
|
|
}
|
|
break;
|
|
case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
|
|
|
|
#if defined(LSI_VALUE)
|
|
if (LSI_VALUE)
|
|
{
|
|
(*((rt_uint32_t *)arg)) = wdt_dev->Reload * 256 / LSI_VALUE;
|
|
}
|
|
else
|
|
{
|
|
LOG_E("Please define the value of LSI_VALUE!");
|
|
}
|
|
#else
|
|
#error "Please define the value of LSI_VALUE!"
|
|
#endif
|
|
break;
|
|
case RT_DEVICE_CTRL_WDT_START:
|
|
|
|
IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
|
|
IWDG_SetPrescaler(wdt_dev->Prescaler);
|
|
IWDG_SetReload(wdt_dev->Reload);
|
|
IWDG_WriteAccessCmd(IWDG_WriteAccess_Disable);
|
|
IWDG_Enable();
|
|
wdt_dev->is_start = 1;
|
|
|
|
break;
|
|
default:
|
|
LOG_W("This command is not supported.");
|
|
return -RT_ERROR;
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
static struct rt_watchdog_ops watchdog_ops =
|
|
{
|
|
.init = ch32_wdt_init,
|
|
.control = ch32_wdt_control,
|
|
};
|
|
|
|
int rt_hw_wdt_init(void)
|
|
{
|
|
watchdog_dev.instance = IWDG;
|
|
watchdog_dev.Prescaler = IWDG_Prescaler_256;
|
|
watchdog_dev.Reload = 0x0000FFF;
|
|
watchdog_dev.is_start = 0;
|
|
watchdog_dev.parent.ops = &watchdog_ops;
|
|
|
|
/* register watchdog device */
|
|
if (rt_hw_watchdog_register(&watchdog_dev.parent, "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_hw_wdt_init);
|
|
|
|
#endif /* BSP_USING_IWDT */
|