44 lines
795 B
C
44 lines
795 B
C
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/*
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* stm32f4_rng.c
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*
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* Created on: Aug 30, 2016
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* Author: tkl
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*/
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#include <stddef.h>
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#include "board.h"
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int stm32f4_rng_open(const void *this)
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{
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if(NULL == this)
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return -1;
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struct stm32f4_rng *dev = (struct stm32f4_rng *)this;
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__HAL_RCC_RNG_CLK_ENABLE();
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HAL_RNG_DeInit(dev->rng_handle);
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HAL_RNG_Init(dev->rng_handle);
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return 0;
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}
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int stm32f4_rng_close(const void *this)
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{
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if(NULL == this)
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return -1;
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struct stm32f4_rng *dev = (struct stm32f4_rng *)this;
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__HAL_RCC_RNG_CLK_DISABLE();
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HAL_RNG_DeInit(dev->rng_handle);
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return 0;
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}
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unsigned int stm32f4_rng_read(const void *this)
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{
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if(NULL == this)
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return -1;
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struct stm32f4_rng *dev = (struct stm32f4_rng *)this;
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uint32_t random = 0;
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HAL_RNG_GenerateRandomNumber(dev->rng_handle, &random);
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return random;
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}
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