#include "stm32f4xx.h"
#include "base.h"
#include "random.h"







static int g_inited=0;
void RANDOM_Init (void)
{
    if(g_inited==0)
    {
        RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
        RNG_Cmd(ENABLE);
        RANDOM_Get(); 
        g_inited=1;
    }
}


u32 RANDOM_Get (void)
{
	if (RNG->CR & RNG_CR_RNGEN)
	{
		while (RNG_GetFlagStatus(RNG_FLAG_DRDY)!=SET);
		return RNG_GetRandomNumber();
	}
	else
		return 0;
}