LL01/code_boot_out/qm/algorithmic/random_pseudo.c

/** ##########################################################################
**     Filename  :
**     Project   :
**     Module    :
**     Processor :
**     Version   :
**     Compiler  :
**     Date/Time :
**     Abstract  :
**     Contents  :
**     Note      :
**
**     (c) Copyright dmdz Co.,Ltd
**  --------------------------------------------------------------------------
**               R E V I S I O N   H I S T O R Y
**  --------------------------------------------------------------------------
**  Date       Ver   Author             Description

**  -20230602-  --V1.0--  --mingyea---  --修改--

** #########################################################################*/

/*---------------------------------------------------------------------------
- I N C L U D E   F I L E S
----------------------------------------------------------------------------*/
#include "common_types.h"
//#include "error.h"
#include "crc.h"

#include "random_pseudo.h"
//#include "adc_manage.h"

/*---------------------------------------------------------------------------
- D E F I N E S / M A C R O S
----------------------------------------------------------------------------*/
#define  RAND_SEED_INIT_VAL                                1u   /* See Note #1a.                                        */

#define  RAND_LCG_PARAM_M                         0x7FFFFFFFu   /* See Note #1b2B.                                      */
#define  RAND_LCG_PARAM_A                         1103515245u   /* See Note #1b1A2.                                     */
#define  RAND_LCG_PARAM_B                              12345u   /* See Note #1b1A3.   */

/*---------------------------------------------------------------------------
- T Y P E   D E F I N I T I O N S
----------------------------------------------------------------------------*/


/*---------------------------------------------------------------------------
- S T A T I C   V A R I A B L E S
----------------------------------------------------------------------------*/
static u32 random_seed_cur=0;		//当前随机数值
static u32 random_seed_pre=0;		//上次随机数值
static u32 random_input1_count=0;

/*---------------------------------------------------------------------------
* G L O B A L   V A R I A B L E S
----------------------------------------------------------------------------*/


/*---------------------------------------------------------------------------
- C O N S T A N T S
----------------------------------------------------------------------------*/

/*---------------------------------------------------------------------------
- F U N C T I O N   P R O T O T Y P E
----------------------------------------------------------------------------*/
static void random_set_seed(u32 seed);
static u32 random_seed(u32 seed);
static u32 random_generate_seed(void);


/*---------------------------------------------------------------------------
|Prototype			:
|Called by			:
|Preconditions		:
|Input parameters	:
|Output parameters	:
|Return value		:
|Description		:注意，不能初始值为一个固定值，应考虙每个单片机的不同；在定时器初始化之后
----------------------------------------------------------------------------*/
void random_init(void)
{
	u32 l_random;
	#if 0
	random_set_seed(RAND_SEED_INIT_VAL);	//第一次
	#else
	l_random = 0;   //adc_get_voltage_value(ADC_CHANNEL_SBAT);	//定时器0寄存器的计数值
	random_set_seed(l_random);	//第一次
	#endif
}


/*---------------------------------------------------------------------------
|Prototype			:
|Called by			:
|Preconditions		:
|Input parameters	:
|Output parameters	:
|Return value		:
|Description		:
----------------------------------------------------------------------------*/
static void random_set_seed(u32 seed)
{
	random_seed_cur = seed;
}

/*---------------------------------------------------------------------------
|Prototype			:
|Called by			:
|Preconditions		:
|Input parameters	:
|Output parameters	:
|Return value		:
|Description		:  算法
----------------------------------------------------------------------------*/
static u32 random_seed(u32 seed)
{
	u32 l_random;
	l_random = ( ( (u32)RAND_LCG_PARAM_A * seed) + (u32)RAND_LCG_PARAM_B)  %  ((u32)RAND_LCG_PARAM_M + 1u);
	return l_random;
}


/*---------------------------------------------------------------------------
|Prototype			:
|Called by			:
|Preconditions		:
|Input parameters	:
|Output parameters	:
|Return value		:
|Description		: 产生随机数
----------------------------------------------------------------------------*/
static u32 random_generate_seed(void)
{
	u32 l_random;
	l_random = random_seed_cur;
	random_seed_cur = random_seed(l_random  + random_input1_count);
	return random_seed_cur;
}



/*---------------------------------------------------------------------------
|Prototype			:
|Called by			:
|Preconditions		:
|Input parameters	:
|Output parameters	:
|Return value		:
|Description		: 启动一次随机数的产生； 防止连续两次不重复
----------------------------------------------------------------------------*/
void random_start(void)
{
	random_generate_seed();
	if( random_seed_cur == random_seed_pre)
	 {
	 		random_seed_cur++;
	 }
	 else
	 {

	 }
	random_seed_pre = random_seed_cur;
}


/*---------------------------------------------------------------------------
|Prototype			:
|Called by			:
|Preconditions		:
|Input parameters	:
|Output parameters	:
|Return value		:
|Description		:  返回当前随机数
----------------------------------------------------------------------------*/
void random_get(u8 *random_data,u8 random_len)
{
	//u8  i;
	u8 l_len = random_len;
	//if(l_len > SERVICE_SEED_LEN_VALID)
	{
	    //l_len =SERVICE_SEED_LEN_VALID;
	}
	random_data[0] = (u8)(random_seed_cur >> 24);
	random_data[1] = (u8)(random_seed_cur >> 16);
	random_data[2] = (u8)(random_seed_cur >> 8);
	random_data[3] = (u8)(random_seed_cur);
}






/*---------------------------------------------------------------------------
|Prototype			:
|Called by			:
|Preconditions		:
|Input parameters	:
|Output parameters	:
|Return value		:
|Description		:
----------------------------------------------------------------------------*/
void random_input_count(void)
{
	random_input1_count++;
}