32blit-stm32/Src/rng.c

/**
  ******************************************************************************
  * File Name          : RNG.c
  * Description        : This file provides code for the configuration
  *                      of the RNG instances.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under Ultimate Liberty license
  * SLA0044, the "License"; You may not use this file except in compliance with
  * the License. You may obtain a copy of the License at:
  *                             www.st.com/SLA0044
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "rng.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

RNG_HandleTypeDef hrng;

/* RNG init function */
void MX_RNG_Init(void)
{

  hrng.Instance = RNG;
  hrng.Init.ClockErrorDetection = RNG_CED_ENABLE;
  if (HAL_RNG_Init(&hrng) != HAL_OK)
  {
    Error_Handler();
  }

}

void HAL_RNG_MspInit(RNG_HandleTypeDef* rngHandle)
{

  if(rngHandle->Instance==RNG)
  {
  /* USER CODE BEGIN RNG_MspInit 0 */

  /* USER CODE END RNG_MspInit 0 */
    /* RNG clock enable */
    __HAL_RCC_RNG_CLK_ENABLE();
  /* USER CODE BEGIN RNG_MspInit 1 */

  /* USER CODE END RNG_MspInit 1 */
  }
}

void HAL_RNG_MspDeInit(RNG_HandleTypeDef* rngHandle)
{

  if(rngHandle->Instance==RNG)
  {
  /* USER CODE BEGIN RNG_MspDeInit 0 */

  /* USER CODE END RNG_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_RNG_CLK_DISABLE();
  /* USER CODE BEGIN RNG_MspDeInit 1 */

  /* USER CODE END RNG_MspDeInit 1 */
  }
} 

/* USER CODE BEGIN 1 */
uint32_t HAL_GetRandom(void) {
	uint32_t random = 0;

	// Wait for the generator to become ready to use
	while(HAL_RNG_GetState(&hrng) != HAL_RNG_STATE_READY);

	// Generate random 32 bit number and return it
	if(HAL_RNG_GenerateRandomNumber(&hrng, &random) != HAL_OK) {
        Error_Handler();
    }

	return random;
}
/* USER CODE END 1 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/