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added random number generator driver and stuff

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This commit is contained in:
Thomas Klaehn
2016-08-30 17:04:22 +02:00
parent b777ab9e6f
commit d7e6f8b0ee
11 changed files with 233 additions and 6 deletions
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25
source/firmware/arch/stm32f4xx/driver/include/stm32f4_rng.h Normal file
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/*
* stm32f4_rng.h
*
* Created on: Aug 30, 2016
* Author: tkl
*/
#ifndef SOURCE_FIRMWARE_ARCH_STM32F4XX_INCLUDE_STM32F4_RNG_H_
#define SOURCE_FIRMWARE_ARCH_STM32F4XX_INCLUDE_STM32F4_RNG_H_
struct stm32f4_rng {
RNG_HandleTypeDef *rng_handle;
};
int stm32f4_rng_open(const void *this);
int stm32f4_rng_close(const void *this);
unsigned int stm32f4_rng_read(const void *this);
static const struct rng_fp rng_fp = {
.open = stm32f4_rng_open,
.close = stm32f4_rng_close,
.read = stm32f4_rng_read,
};
#endif /* SOURCE_FIRMWARE_ARCH_STM32F4XX_INCLUDE_STM32F4_RNG_H_ */

43
source/firmware/arch/stm32f4xx/driver/stm32f4_rng.c Normal file
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/*
* stm32f4_rng.c
*
* Created on: Aug 30, 2016
* Author: tkl
*/
#include <stddef.h>
#include "board.h"
int stm32f4_rng_open(const void *this)
{
if(NULL == this)
return -1;
struct stm32f4_rng *dev = (struct stm32f4_rng *)this;
__HAL_RCC_RNG_CLK_ENABLE();
HAL_RNG_DeInit(dev->rng_handle);
HAL_RNG_Init(dev->rng_handle);
return 0;
}
int stm32f4_rng_close(const void *this)
{
if(NULL == this)
return -1;
struct stm32f4_rng *dev = (struct stm32f4_rng *)this;
__HAL_RCC_RNG_CLK_DISABLE();
HAL_RNG_DeInit(dev->rng_handle);
return 0;
}
unsigned int stm32f4_rng_read(const void *this)
{
if(NULL == this)
return -1;
struct stm32f4_rng *dev = (struct stm32f4_rng *)this;
uint32_t random = 0;
HAL_RNG_GenerateRandomNumber(dev->rng_handle, &random);
return random;
}