41 lines
448 B
C
41 lines
448 B
C
#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;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|