129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2006-2023, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2020-01-22 shelton first version
|
|
* 2021-11-10 breo.com porting to n32
|
|
*/
|
|
|
|
#include <board.h>
|
|
#include <drivers/watchdog.h>
|
|
|
|
#ifdef RT_USING_WDT
|
|
#ifdef BSP_USING_WDT
|
|
|
|
#define LSI_VALUE 40000
|
|
|
|
//#define DRV_DEBUG
|
|
#define LOG_TAG "drv.wdt"
|
|
#include <drv_log.h>
|
|
|
|
struct n32_wdt_obj
|
|
{
|
|
IWDG_Module *instance;
|
|
rt_uint32_t Prescaler;
|
|
rt_uint32_t Reload;
|
|
rt_uint16_t is_start;
|
|
};
|
|
static struct n32_wdt_obj n32_wdt;
|
|
static struct rt_watchdog_ops ops;
|
|
static rt_watchdog_t watchdog;
|
|
|
|
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:
|
|
IWDG_ReloadKey();
|
|
break;
|
|
/* set watchdog timeout */
|
|
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
|
|
#if defined(LSI_VALUE)
|
|
if (LSI_VALUE)
|
|
{
|
|
n32_wdt.Reload = (*((rt_uint32_t *)arg)) * LSI_VALUE / 256 ;
|
|
}
|
|
else
|
|
{
|
|
LOG_E("Please define the value of LSI_VALUE!");
|
|
}
|
|
if (n32_wdt.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 (n32_wdt.is_start)
|
|
{
|
|
IWDG_WriteConfig(IWDG_WRITE_ENABLE);
|
|
IWDG_SetPrescalerDiv(n32_wdt.Prescaler);
|
|
IWDG_CntReload(n32_wdt.Reload);
|
|
IWDG_WriteConfig(IWDG_WRITE_DISABLE);
|
|
IWDG_Enable();
|
|
}
|
|
break;
|
|
case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
|
|
#if defined(LSI_VALUE)
|
|
if (LSI_VALUE)
|
|
{
|
|
(*((rt_uint32_t *)arg)) = n32_wdt.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_WriteConfig(IWDG_WRITE_ENABLE);
|
|
IWDG_SetPrescalerDiv(n32_wdt.Prescaler);
|
|
IWDG_CntReload(n32_wdt.Reload);
|
|
IWDG_WriteConfig(IWDG_WRITE_DISABLE);
|
|
IWDG_Enable();
|
|
n32_wdt.is_start = 1;
|
|
break;
|
|
default:
|
|
LOG_W("This command is not supported.");
|
|
return -RT_ERROR;
|
|
}
|
|
return RT_EOK;
|
|
}
|
|
|
|
int rt_hw_wdt_init(void)
|
|
{
|
|
n32_wdt.instance = IWDG;
|
|
n32_wdt.Prescaler = IWDG_PRESCALER_DIV256;
|
|
n32_wdt.Reload = 0x00000FFF;
|
|
n32_wdt.is_start = 0;
|
|
|
|
ops.init = &wdt_init;
|
|
ops.control = &wdt_control;
|
|
watchdog.ops = &ops;
|
|
/* register watchdog device */
|
|
if (rt_hw_watchdog_register(&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_hw_wdt_init);
|
|
|
|
#endif /* BSP_USING_WDT */
|
|
#endif /* RT_USING_WDT */
|
|
|