41 lines
448 B
C
41 lines
448 B
C
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#include "stm32f4xx.h"
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#include "base.h"
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#include "random.h"
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static int g_inited=0;
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void RANDOM_Init (void)
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{
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if(g_inited==0)
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{
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RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
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RNG_Cmd(ENABLE);
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RANDOM_Get();
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g_inited=1;
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}
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}
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u32 RANDOM_Get (void)
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{
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if (RNG->CR & RNG_CR_RNGEN)
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{
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while (RNG_GetFlagStatus(RNG_FLAG_DRDY)!=SET);
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return RNG_GetRandomNumber();
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}
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else
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return 0;
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}
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