/**
* @brief Handles RNG interrupt request.
* @note In the case of a clock error, the RNG is no more able to generate
* random numbers because the PLL48CLK clock is not correct. User has
* to check that the clock controller is correctly configured to provide
* the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
* The clock error has no impact on the previously generated
* random numbers, and the RNG_DR register contents can be used.
* @note In the case of a seed error, the generation of random numbers is
* interrupted as long as the SECS bit is '1'. If a number is
* available in the RNG_DR register, it must not be used because it may
* not have enough entropy. In this case, it is recommended to clear the
* SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
* the RNG peripheral to reinitialize and restart the RNG.
* @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
* or CEIS are set.
* @param hrng: pointer to a RNG_HandleTypeDef structure that contains
* the configuration information for RNG.
* @retval None
*/
void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
{
/* RNG clock error interrupt occurred */
if((__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET) || (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET))
{
/* Change RNG peripheral state */
hrng->State = HAL_RNG_STATE_ERROR;
HAL_RNG_ErrorCallback(hrng);
/* Clear the clock error flag */
__HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI|RNG_IT_SEI);
}
/* Check RNG data ready interrupt occurred */
if(__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
{
/* Generate random number once, so disable the IT */
__HAL_RNG_DISABLE_IT(hrng);
/* Get the 32bit Random number (DRDY flag automatically cleared) */
hrng->RandomNumber = hrng->Instance->DR;
if(hrng->State != HAL_RNG_STATE_ERROR)
{
/* Change RNG peripheral state */
hrng->State = HAL_RNG_STATE_READY;
/* Data Ready callback */
HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
}
}
}
/**
* @brief Handles RNG interrupt request.
* @note In the case of a clock error, the RNG is no more able to generate
* random numbers because the PLL48CLK clock is not correct. User has
* to check that the clock controller is correctly configured to provide
* the RNG clock and clear the CEIS bit using __HAL_RNG_CLEAR_IT().
* The clock error has no impact on the previously generated
* random numbers, and the RNG_DR register contents can be used.
* @note In the case of a seed error, the generation of random numbers is
* interrupted as long as the SECS bit is '1'. If a number is
* available in the RNG_DR register, it must not be used because it may
* not have enough entropy. In this case, it is recommended to clear the
* SEIS bit using __HAL_RNG_CLEAR_IT(), then disable and enable
* the RNG peripheral to reinitialize and restart the RNG.
* @note User-written HAL_RNG_ErrorCallback() API is called once whether SEIS
* or CEIS are set.
* @param hrng pointer to a RNG_HandleTypeDef structure that contains
* the configuration information for RNG.
* @retval None
*/
void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
{
uint32_t rngclockerror = 0U;
/* RNG clock error interrupt occurred */
if (__HAL_RNG_GET_IT(hrng, RNG_IT_CEI) != RESET)
{
rngclockerror = 1U;
}
else if (__HAL_RNG_GET_IT(hrng, RNG_IT_SEI) != RESET)
{
rngclockerror = 1U;
}
else
{
/* Nothing to do */
}
if (rngclockerror == 1U)
{
/* Change RNG peripheral state */
hrng->State = HAL_RNG_STATE_ERROR;
#if (USE_HAL_RNG_REGISTER_CALLBACKS == 1)
/* Call registered Error callback */
hrng->ErrorCallback(hrng);
#else
/* Call legacy weak Error callback */
HAL_RNG_ErrorCallback(hrng);
#endif /* USE_HAL_RNG_REGISTER_CALLBACKS */
/* Clear the clock error flag */
__HAL_RNG_CLEAR_IT(hrng, RNG_IT_CEI | RNG_IT_SEI);
}
/* Check RNG data ready interrupt occurred */
if (__HAL_RNG_GET_IT(hrng, RNG_IT_DRDY) != RESET)
{
/* Generate random number once, so disable the IT */
__HAL_RNG_DISABLE_IT(hrng);
/* Get the 32bit Random number (DRDY flag automatically cleared) */
hrng->RandomNumber = hrng->Instance->DR;
if (hrng->State != HAL_RNG_STATE_ERROR)
{
/* Change RNG peripheral state */
hrng->State = HAL_RNG_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hrng);
#if (USE_HAL_RNG_REGISTER_CALLBACKS == 1)
/* Call registered Data Ready callback */
hrng->ReadyDataCallback(hrng, hrng->RandomNumber);
#else
/* Call legacy weak Data Ready callback */
HAL_RNG_ReadyDataCallback(hrng, hrng->RandomNumber);
#endif /* USE_HAL_RNG_REGISTER_CALLBACKS */
}
}
}