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/*******************************************************************************
* Copyright (C) 2020, Huada Semiconductor Co., Ltd. All rights reserved.
*
* This software component is licensed by HDSC under BSD 3-Clause license
* (the "License"); You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*/
/******************************************************************************/
/** \file hc32f460_swdt.c
**
** A detailed description is available at
** @link SwdtGroup Special Watchdog Counter description @endlink
**
** - 2018-10-16 CDT First version for Device Driver Library of SWDT.
**
******************************************************************************/
/*******************************************************************************
* Include files
******************************************************************************/
#include "hc32f460_swdt.h"
#include "hc32f460_utility.h"
/**
*******************************************************************************
** \addtogroup SwdtGroup
******************************************************************************/
//@{
/*******************************************************************************
* Local type definitions ('typedef')
******************************************************************************/
/*******************************************************************************
* Local pre-processor symbols/macros ('#define')
******************************************************************************/
/*!< Parameter valid check for flag type */
#define IS_VALID_FLAG_TYPE(x) \
( (SwdtFlagCountUnderflow == (x)) || \
(SwdtFlagRefreshError == (x)))
/*!< SWDT_RR register refresh key */
#define SWDT_REFRESH_START_KEY ((uint16_t)0x0123)
#define SWDT_REFRESH_END_KEY_ ((uint16_t)0x3210)
/*******************************************************************************
* Global variable definitions (declared in header file with 'extern')
******************************************************************************/
/*******************************************************************************
* Local function prototypes ('static')
******************************************************************************/
/*******************************************************************************
* Local variable definitions ('static')
******************************************************************************/
/*******************************************************************************
* Function implementation - global ('extern') and local ('static')
******************************************************************************/
/**
*******************************************************************************
** \brief SWDT refresh counter
**
** \param [in] None
**
** \retval Ok Process successfully done
**
******************************************************************************/
en_result_t SWDT_RefreshCounter(void)
{
en_result_t enRet = Ok;
M4_SWDT->RR = SWDT_REFRESH_START_KEY;
M4_SWDT->RR = SWDT_REFRESH_END_KEY_;
return enRet;
}
/**
*******************************************************************************
** \brief Get SWDT counter current count value
**
** \param [in] None
**
** \retval uint16_t SWDT counter current count value
**
******************************************************************************/
uint16_t SWDT_GetCountValue(void)
{
return ((uint16_t)M4_SWDT->SR_f.CNT);
}
/**
*******************************************************************************
** \brief Get SWDT flag status
**
** \param [in] enFlag SWDT flag type
** \arg SwdtFlagCountUnderflow Count underflow flag
** \arg SwdtFlagRefreshError Refresh error flag
**
** \retval Set Flag is set
** \retval Reset Flag is reset
**
******************************************************************************/
en_flag_status_t SWDT_GetFlag(en_swdt_flag_type_t enFlag)
{
en_flag_status_t enFlagSta = Reset;
/* Check parameters */
DDL_ASSERT(IS_VALID_FLAG_TYPE(enFlag));
switch (enFlag)
{
case SwdtFlagCountUnderflow:
enFlagSta = (en_flag_status_t)M4_SWDT->SR_f.UDF;
break;
case SwdtFlagRefreshError:
enFlagSta = (en_flag_status_t)M4_SWDT->SR_f.REF;
break;
default:
break;
}
return enFlagSta;
}
/**
*******************************************************************************
** \brief Clear SWDT flag status
**
** \param [in] enFlag SWDT flag type
** \arg SwdtFlagCountUnderflow Count underflow flag
** \arg SwdtFlagRefreshError Refresh error flag
**
** \retval Ok Process successfully done
**
******************************************************************************/
en_result_t SWDT_ClearFlag(en_swdt_flag_type_t enFlag)
{
en_result_t enRet = Ok;
/* Check parameters */
DDL_ASSERT(IS_VALID_FLAG_TYPE(enFlag));
switch (enFlag)
{
case SwdtFlagCountUnderflow:
M4_SWDT->SR_f.UDF = 0u;
break;
case SwdtFlagRefreshError:
M4_SWDT->SR_f.REF = 0u;
break;
default:
break;
}
return enRet;
}
//@} // SwdtGroup
/******************************************************************************
* EOF (not truncated)
*****************************************************************************/
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