杰发科技AC7840——真随机数和伪随机数

liu_endong2026-01-10 9:45

0. 真随机数和伪随机数

1. CSE_DRV_InitRNG

CSE_DRV_InitRNG****初始化真随机数生成器

2. CSE_DRV_GenerateRND

CSE_DRV_GenerateRND****生成一个128bit真随机数，即16bytes

3. 随机数的重复概率

实测非常小，至少1000w次不会出现同一个值

cpp 复制代码

unsigned int count = 0;
int main(void)
{
    status_t Res;
    uint8_t RNG[16] = {0x00};
    uint8_t OldRNG[16] = {0x00};

    SystemClock_Config();
    InitDebug();
    printf("demo start...\r\n");

    FLASH_DRV_Init(&Flash1_InitConfig, &flash_Config);

    if (flash_Config.flexRAMSize == 0)
    {
        FLASH_DRV_UnlockCtrl();
        Res = FLASH_DRV_Partition(&flash_Config, 0x00, 0x03, 0);
        printf("FLASH_DRV_Partition,Res = 0x%x \r\n", Res);
        NVIC_SystemReset();
    }

    /*initialize CSE*/
    CSE_DRV_Init(&cse_State);

    /*initialize RNG*/
    Res = CSE_DRV_InitRNG();
    printf("CSE_DRV_InitRNG,Res = 0x%x \r\n", Res);

    Res = CSE_DRV_GenerateRND(OldRNG);
    unsigned int countflag = 1000000;
		unsigned int addTimes = 0;
    while (1)
    {
        Res = CSE_DRV_GenerateRND(RNG);

        for (int i = 0; i < 16; i++)
        {

            if (OldRNG[i] == RNG[i])
            {
                count++;
            }
            if (count >= 15)
            {
								printf("RNG: ");
                Numpy_Put(RNG, 16);
            }
        }
        count = 0;
        countflag--;
        if (countflag == 0)
        {
						addTimes++;
						printf("RNG 1000000 times :  addTimes %d \r\n",addTimes);
            countflag = 1000000;
        }
    }
}