HS550/Src/id.c

/*******************************************************************
* id.c
*
********************************************************************/

/* Includes ------------------------------------------------------------------*/
#include <includes.h>

#define ID_BASE_ADDR (0x1FFFF7E8ul)


/***********************************************************
* 函数：GetSTM32ID
* 参数：1、*pID 读取的ID存放指针，12字节ID
* 功能：获取本芯片内部出厂绑定的ID
***********************************************************/
void GetSTM32ID(unsigned char *pID)
{
    unsigned char i = 0;
	u32 addr = ID_BASE_ADDR; 
	for(i = 0; i < 12; i++)
	{
	    *pID = *(u32 *)addr;   
		pID++;
		addr++; 
	}    
}
/************************************************************
*
*************************************************************/
unsigned char GetRandBySTM32ID(void)
{
	unsigned char id[12];
	unsigned char rand=0x58;//种子
	int i;
	GetSTM32ID(id);
	for(i=0;i<12;i++){
		rand^=id[i];	
	}
	if(rand==0x00)rand=0x58;
	if(rand==0xff)rand=0x85;
	return rand;
}





















/*********************************************************************/