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/******************************************************************************
*Copyright(C)2018, Huada Semiconductor Co.,Ltd All rights reserved.
*
* This software is owned and published by:
* Huada Semiconductor Co.,Ltd("HDSC").
*
* BY DOWNLOADING, INSTALLING OR USING THIS SOFTWARE, YOU AGREE TO BE BOUND
* BY ALL THE TERMS AND CONDITIONS OF THIS AGREEMENT.
*
* This software contains source code for use with HDSC
* components. This software is licensed by HDSC to be adapted only
* for use in systems utilizing HDSC components. HDSC shall not be
* responsible for misuse or illegal use of this software for devices not
* supported herein. HDSC is providing this software "AS IS" and will
* not be responsible for issues arising from incorrect user implementation
* of the software.
*
* Disclaimer:
* HDSC MAKES NO WARRANTY, EXPRESS OR IMPLIED, ARISING BY LAW OR OTHERWISE,
* REGARDING THE SOFTWARE (INCLUDING ANY ACOOMPANYING WRITTEN MATERIALS),
* ITS PERFORMANCE OR SUITABILITY FOR YOUR INTENDED USE, INCLUDING,
* WITHOUT LIMITATION, THE IMPLIED WARRANTY OF MERCHANTABILITY, THE IMPLIED
* WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR USE, AND THE IMPLIED
* WARRANTY OF NONINFRINGEMENT.
* HDSC SHALL HAVE NO LIABILITY (WHETHER IN CONTRACT, WARRANTY, TORT,
* NEGLIGENCE OR OTHERWISE) FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT
* LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION,
* LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS) ARISING FROM USE OR
* INABILITY TO USE THE SOFTWARE, INCLUDING, WITHOUT LIMITATION, ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES OR LOSS OF DATA,
* SAVINGS OR PROFITS,
* EVEN IF Disclaimer HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
* YOU ASSUME ALL RESPONSIBILITIES FOR SELECTION OF THE SOFTWARE TO ACHIEVE YOUR
* INTENDED RESULTS, AND FOR THE INSTALLATION OF, USE OF, AND RESULTS OBTAINED
* FROM, THE SOFTWARE.
*
* This software may be replicated in part or whole for the licensed use,
* with the restriction that this Disclaimer and Copyright notice must be
* included with each copy of this software, whether used in part or whole,
* at all times.
*/
/** \file rng.c
**
** Common API of rng.
** @link flashGroup Some description @endlink
**
** - 2018-05-08
**
******************************************************************************/
/*******************************************************************************
* Include files
******************************************************************************/
#include "hc32l196_trng.h"
/**
*******************************************************************************
** \addtogroup FlashGroup
******************************************************************************/
//@{
/*******************************************************************************
* Local pre-processor symbols/macros ('#define')
******************************************************************************/
/*******************************************************************************
* Global variable definitions (declared in header file with 'extern')
******************************************************************************/
/*******************************************************************************
* Local type definitions ('typedef')
******************************************************************************/
/*******************************************************************************
* Local variable definitions ('static')
******************************************************************************/
/*******************************************************************************
* Local function prototypes ('static')
******************************************************************************/
/*******************************************************************************
* Function implementation - global ('extern') and local ('static')
******************************************************************************/
/**
*****************************************************************************
** \brief 随机数初始化(上电第一次生成随机数）
**
**
** \retval TRUE or FALSE
*****************************************************************************/
en_result_t Trng_Init(void)
{
//==>>生成64bits随机数（上电第一次）
M0P_TRNG->CR_f.RNGCIR_EN = 1;
//模式配置0
M0P_TRNG->MODE_f.LOAD = 1;
M0P_TRNG->MODE_f.FDBK = 1;
M0P_TRNG->MODE_f.CNT = 6;
//生成随机数0
M0P_TRNG->CR_f.RNG_RUN = 1;
while(M0P_TRNG->CR_f.RNG_RUN)
{
;
}
//模式配置1
M0P_TRNG->MODE_f.LOAD = 0;
M0P_TRNG->MODE_f.FDBK = 0;
M0P_TRNG->MODE_f.CNT = 4;
//生成随机数1
M0P_TRNG->CR_f.RNG_RUN = 1;
while(M0P_TRNG->CR_f.RNG_RUN)
{
;
}
//关闭随机源电路，节省功耗
M0P_TRNG->CR_f.RNGCIR_EN = 0;
return Ok;
}
/**
*****************************************************************************
** \brief 生成随机数（非上电第一次生成随机数）
**
**
** \retval TRUE or FALSE
*****************************************************************************/
en_result_t Trng_Generate(void)
{
//==>>生成64bits随机数（非上电第一次生成）
M0P_TRNG->CR_f.RNGCIR_EN = 1;
//模式配置0
M0P_TRNG->MODE_f.LOAD = 0;
M0P_TRNG->MODE_f.FDBK = 1;
M0P_TRNG->MODE_f.CNT = 6;
//生成随机数0
M0P_TRNG->CR_f.RNG_RUN = 1;
while(M0P_TRNG->CR_f.RNG_RUN)
{
;
}
//模式配置1
M0P_TRNG->MODE_f.FDBK = 0;
M0P_TRNG->MODE_f.CNT = 4;
M0P_TRNG->MODE_f.CNT = 4;
//生成随机数1
M0P_TRNG->CR_f.RNG_RUN = 1;
while(M0P_TRNG->CR_f.RNG_RUN)
{
;
}
//关闭随机源电路，节省功耗
M0P_TRNG->CR_f.RNGCIR_EN = 0;
return Ok;
}
/**
*****************************************************************************
** \brief 随机数获取
**
** \retval data0
*****************************************************************************/
uint32_t Trng_GetData0(void)
{
return M0P_TRNG->DATA0;
}
/**
*****************************************************************************
** \brief 随机数获取
**
** \retval data1
*****************************************************************************/
uint32_t Trng_GetData1(void)
{
return M0P_TRNG->DATA1;
}
//@} // TrngGroup
/*******************************************************************************
* EOF (not truncated)
******************************************************************************/
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