/******************************************************************************
*Copyright(C)2018, Huada Semiconductor Co.,Ltd All rights reserved.
*
* This software is owned and published by:
* Huada Semiconductor Co.,Ltd("HDSC").
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* 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.
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* REGARDING THE SOFTWARE (INCLUDING ANY ACOOMPANYING WRITTEN MATERIALS),
* ITS PERFORMANCE OR SUITABILITY FOR YOUR INTENDED USE, INCLUDING,
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*/

/** \file rng.c
 **
 ** Common API of rng.
 ** @link flashGroup Some description @endlink
 **
 **   - 2018-05-08
 **
 ******************************************************************************/

/*******************************************************************************
 * Include files
 ******************************************************************************/
#include "rng.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 Rng_Init(void)
{
    //==>>生成64bits随机数（上电第一次）
    M0P_RNG->CR_f.RNGCIR_EN = 1;
    //模式配置0
    M0P_RNG->MODE_f.LOAD    = 1;
    M0P_RNG->MODE_f.FDBK    = 1;
    M0P_RNG->MODE_f.CNT     = 6;
    //生成随机数0
    M0P_RNG->CR_f.RNG_RUN  = 1;
    while(M0P_RNG->CR_f.RNG_RUN)
    {
        ;
    }
    
    //模式配置1
    M0P_RNG->MODE_f.LOAD    = 0;
    M0P_RNG->MODE_f.FDBK    = 0;
    M0P_RNG->MODE_f.CNT     = 4;
    //生成随机数1
    M0P_RNG->CR_f.RNG_RUN  = 1;
    while(M0P_RNG->CR_f.RNG_RUN)
    {
        ;
    }

    //关闭随机源电路，节省功耗
    M0P_RNG->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 Rng_Generate(void)
{
    //==>>生成64bits随机数（非上电第一次生成）
    M0P_RNG->CR_f.RNGCIR_EN = 1;
    
    //模式配置0
    M0P_RNG->MODE_f.LOAD    = 0;
    M0P_RNG->MODE_f.FDBK    = 1;
    M0P_RNG->MODE_f.CNT     = 6;
    //生成随机数0
    M0P_RNG->CR_f.RNG_RUN  = 1;
    while(M0P_RNG->CR_f.RNG_RUN)
    {
        ;
    }
    
    //模式配置1
    M0P_RNG->MODE_f.FDBK    = 0;
    M0P_RNG->MODE_f.CNT     = 4;
    M0P_RNG->MODE_f.CNT     = 4;
    //生成随机数1
    M0P_RNG->CR_f.RNG_RUN  = 1;
    while(M0P_RNG->CR_f.RNG_RUN)
    {
        ;
    }

    //关闭随机源电路，节省功耗
    M0P_RNG->CR_f.RNGCIR_EN = 0;    
    
    return Ok;
}

/**
 *****************************************************************************
 ** \brief 随机数获取
 ** 
 ** \retval data0                                     
 *****************************************************************************/
uint32_t Rng_GetData0(void)
{
    return M0P_RNG->DATA0;
}

/**
 *****************************************************************************
 ** \brief 随机数获取
 ** 
 ** \retval data1                                     
 *****************************************************************************/
uint32_t Rng_GetData1(void)
{
    return M0P_RNG->DATA1;
}

//@} // RngGroup

/*******************************************************************************
 * EOF (not truncated)
 ******************************************************************************/