From 3e4f402c0f93f76535511fa7b6ec12d060430f34 Mon Sep 17 00:00:00 2001 From: Fredrik Thulin Date: Wed, 2 Sep 2015 16:35:31 +0200 Subject: import CMSIS 1.3.2 (from STM32Cube FW_F4 V1.7.0) --- .../STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rng.c | 946 +++++++++++---------- 1 file changed, 515 insertions(+), 431 deletions(-) (limited to 'Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rng.c') diff --git a/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rng.c b/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rng.c index d9372ed..a9873b6 100644 --- a/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rng.c +++ b/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rng.c @@ -1,431 +1,515 @@ -/** - ****************************************************************************** - * @file stm32f4xx_hal_rng.c - * @author MCD Application Team - * @version V1.1.0 - * @date 19-June-2014 - * @brief RNG HAL module driver. - * This file provides firmware functions to manage the following - * functionalities of the Random Number Generator (RNG) peripheral: - * + Initialization/de-initialization functions - * + Peripheral Control functions - * + Peripheral State functions - * - @verbatim - ============================================================================== - ##### How to use this driver ##### - ============================================================================== - [..] - The RNG HAL driver can be used as follows: - - (#) Enable the RNG controller clock using __RNG_CLK_ENABLE() macro. - (#) Activate the RNG peripheral using __HAL_RNG_ENABLE() macro. - (#) Wait until the 32 bit Random Number Generator contains a valid - random data using (polling/interrupt) mode. - (#) Get the 32 bit random number using HAL_RNG_GetRandomNumber() function. - - @endverbatim - ****************************************************************************** - * @attention - * - *

© COPYRIGHT(c) 2014 STMicroelectronics

- * - * Redistribution and use in source and binary forms, with or without modification, - * are permitted provided that the following conditions are met: - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * 3. Neither the name of STMicroelectronics nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER - * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************** - */ - -/* Includes ------------------------------------------------------------------*/ -#include "stm32f4xx_hal.h" - -/** @addtogroup STM32F4xx_HAL_Driver - * @{ - */ - -/** @defgroup RNG - * @brief RNG HAL module driver. - * @{ - */ - -#ifdef HAL_RNG_MODULE_ENABLED - -#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) ||\ - defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) - -/* Private typedef -----------------------------------------------------------*/ -/* Private define ------------------------------------------------------------*/ -#define RNG_TIMEOUT_VALUE 1000 -/* Private macro -------------------------------------------------------------*/ -/* Private variables ---------------------------------------------------------*/ -/* Private function prototypes -----------------------------------------------*/ -/* Private functions ---------------------------------------------------------*/ - -/** @defgroup RNG_Private_Functions - * @{ - */ - -/** @defgroup RNG_Group1 Initialization and de-initialization functions - * @brief Initialization and Configuration functions. - * -@verbatim - =============================================================================== - ##### Initialization and de-initialization functions ##### - =============================================================================== - [..] This section provides functions allowing to: - (+) Initialize the RNG according to the specified parameters - in the RNG_InitTypeDef and create the associated handle - (+) DeInitialize the RNG peripheral - (+) Initialize the RNG MSP - (+) DeInitialize RNG MSP - -@endverbatim - * @{ - */ - -/** - * @brief Initializes the RNG according to the specified - * parameters in the RNG_InitTypeDef and creates the associated handle. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval HAL status - */ -HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng) -{ - /* Check the RNG handle allocation */ - if(hrng == NULL) - { - return HAL_ERROR; - } - - if(hrng->State == HAL_RNG_STATE_RESET) - { - /* Init the low level hardware */ - HAL_RNG_MspInit(hrng); - } - /* Change RNG peripheral state */ - hrng->State = HAL_RNG_STATE_BUSY; - - /* Enable the RNG Peripheral */ - __HAL_RNG_ENABLE(hrng); - - /* Initialize the RNG state */ - hrng->State = HAL_RNG_STATE_READY; - - /* Return function status */ - return HAL_OK; -} - -/** - * @brief DeInitializes the RNG peripheral. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval HAL status - */ -HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng) -{ - /* Check the RNG peripheral state */ - if(hrng->State == HAL_RNG_STATE_BUSY) - { - return HAL_BUSY; - } - - /* Update the RNG state */ - hrng->State = HAL_RNG_STATE_BUSY; - - /* Disable the RNG Peripheral */ - __HAL_RNG_DISABLE(hrng); - - /* Set the RNG registers to their reset values */ - hrng->Instance->CR &= 0xFFFFFFF3; - hrng->Instance->SR &= 0xFFFFFF98; - hrng->Instance->DR &= 0x0; - - /* DeInit the low level hardware */ - HAL_RNG_MspDeInit(hrng); - - /* Update the RNG state */ - hrng->State = HAL_RNG_STATE_RESET; - - /* Release Lock */ - __HAL_UNLOCK(hrng); - - /* Return the function status */ - return HAL_OK; -} - -/** - * @brief Initializes the RNG MSP. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval None - */ -__weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng) -{ - /* NOTE : This function Should not be modified, when the callback is needed, - the HAL_RNG_MspInit could be implemented in the user file - */ -} - -/** - * @brief DeInitializes the RNG MSP. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval None - */ -__weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng) -{ - /* NOTE : This function Should not be modified, when the callback is needed, - the HAL_RNG_MspDeInit could be implemented in the user file - */ -} - -/** - * @} - */ - -/** @defgroup RNG_Group2 Peripheral Control functions - * @brief management functions. - * -@verbatim - =============================================================================== - ##### Peripheral Control functions ##### - =============================================================================== - [..] This section provides functions allowing to: - (+) Get the 32 bit Random number - (+) Get the 32 bit Random number with interrupt enabled - (+) Handle RNG interrupt request - - -@endverbatim - * @{ - */ - -/** - * @brief Returns a 32-bit random number. - * @note Each time the random number data is read the RNG_FLAG_DRDY flag - * is automatically cleared. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval 32-bit random number - */ -uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng) -{ - uint32_t random32bit = 0; - uint32_t tickstart = 0; - - /* Process Locked */ - __HAL_LOCK(hrng); - - /* Get tick */ - tickstart = HAL_GetTick(); - - /* Check if data register contains valid random data */ - while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET) - { - if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE) - { - return HAL_TIMEOUT; - } - } - - /* Get a 32bit Random number */ - random32bit = hrng->Instance->DR; - - /* Process Unlocked */ - __HAL_UNLOCK(hrng); - - /* Return the 32 bit random number */ - return random32bit; -} - -/** - * @brief Returns a 32-bit random number with interrupt enabled. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval 32-bit random number - */ -uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng) -{ - uint32_t random32bit = 0; - - /* Process Locked */ - __HAL_LOCK(hrng); - - /* Change RNG peripheral state */ - hrng->State = HAL_RNG_STATE_BUSY; - - /* Get a 32bit Random number */ - random32bit = hrng->Instance->DR; - - /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */ - __HAL_RNG_ENABLE_IT(hrng); - - /* Return the 32 bit random number */ - return random32bit; -} - -/** - * @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_FLAG(). - * 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_FLAG(), then disable and enable - * the RNG peripheral to reinitialize and restart the RNG. - * @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_FLAG(hrng, RNG_IT_CEI) != RESET) - { - HAL_RNG_ErrorCallback(hrng); - - /* Clear the clock error flag */ - __HAL_RNG_CLEAR_FLAG(hrng, RNG_IT_CEI); - - /* Change RNG peripheral state */ - hrng->State = HAL_RNG_STATE_ERROR; - - /* Process Unlocked */ - __HAL_UNLOCK(hrng); - } - - /* RNG seed error interrupt occurred */ - if(__HAL_RNG_GET_FLAG(hrng, RNG_IT_SEI) != RESET) - { - HAL_RNG_ErrorCallback(hrng); - - /* Clear the seed error flag */ - __HAL_RNG_CLEAR_FLAG(hrng, RNG_IT_SEI); - - /* Change RNG peripheral state */ - hrng->State = HAL_RNG_STATE_ERROR; - - /* Process Unlocked */ - __HAL_UNLOCK(hrng); - } - - /* Check RNG data ready flag */ - if(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) != RESET) - { - /* Data Ready callback */ - HAL_RNG_ReadyCallback(hrng); - - /* Change RNG peripheral state */ - hrng->State = HAL_RNG_STATE_READY; - - /* Clear the RNG Data Ready flag */ - __HAL_RNG_CLEAR_FLAG(hrng, RNG_FLAG_DRDY); - - /* Process Unlocked */ - __HAL_UNLOCK(hrng); - } -} - -/** - * @brief Data Ready callback in non-blocking mode. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval None - */ - -__weak void HAL_RNG_ReadyCallback(RNG_HandleTypeDef* hrng) -{ - /* NOTE : This function Should not be modified, when the callback is needed, - the HAL_RNG_ReadyCallback could be implemented in the user file - */ -} - -/** - * @brief RNG error callbacks. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval None - */ -__weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng) -{ - /* NOTE : This function Should not be modified, when the callback is needed, - the HAL_RNG_ErrorCallback could be implemented in the user file - */ -} - -/** - * @} - */ - -/** @defgroup RNG_Group3 Peripheral State functions - * @brief Peripheral State functions. - * -@verbatim - =============================================================================== - ##### Peripheral State functions ##### - =============================================================================== - [..] - This subsection permits to get in run-time the status of the peripheral - and the data flow. - -@endverbatim - * @{ - */ - -/** - * @brief Returns the RNG state. - * @param hrng: pointer to a RNG_HandleTypeDef structure that contains - * the configuration information for RNG. - * @retval HAL state - */ -HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng) -{ - return hrng->State; -} - -/** - * @} - */ - -/** - * @} - */ - -#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ - -#endif /* HAL_RNG_MODULE_ENABLED */ -/** - * @} - */ - -/** - * @} - */ - -/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ +/** + ****************************************************************************** + * @file stm32f4xx_hal_rng.c + * @author MCD Application Team + * @version V1.3.2 + * @date 26-June-2015 + * @brief RNG HAL module driver. + * This file provides firmware functions to manage the following + * functionalities of the Random Number Generator (RNG) peripheral: + * + Initialization/de-initialization functions + * + Peripheral Control functions + * + Peripheral State functions + * + @verbatim + ============================================================================== + ##### How to use this driver ##### + ============================================================================== + [..] + The RNG HAL driver can be used as follows: + + (#) Enable the RNG controller clock using __HAL_RCC_RNG_CLK_ENABLE() macro + in HAL_RNG_MspInit(). + (#) Activate the RNG peripheral using HAL_RNG_Init() function. + (#) Wait until the 32 bit Random Number Generator contains a valid + random data using (polling/interrupt) mode. + (#) Get the 32 bit random number using HAL_RNG_GenerateRandomNumber() function. + + @endverbatim + ****************************************************************************** + * @attention + * + *

© COPYRIGHT(c) 2015 STMicroelectronics

+ * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f4xx_hal.h" + +/** @addtogroup STM32F4xx_HAL_Driver + * @{ + */ + +/** @addtogroup RNG + * @{ + */ + +#ifdef HAL_RNG_MODULE_ENABLED + +#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) ||\ + defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) + + +/* Private types -------------------------------------------------------------*/ +/* Private defines -----------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private constants ---------------------------------------------------------*/ +/** @addtogroup RNG_Private_Constants + * @{ + */ +#define RNG_TIMEOUT_VALUE 2 +/** + * @} + */ +/* Private macros ------------------------------------------------------------*/ +/* Private functions prototypes ----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ +/* Exported functions --------------------------------------------------------*/ + +/** @addtogroup RNG_Exported_Functions + * @{ + */ + +/** @addtogroup RNG_Exported_Functions_Group1 + * @brief Initialization and de-initialization functions + * +@verbatim + =============================================================================== + ##### Initialization and de-initialization functions ##### + =============================================================================== + [..] This section provides functions allowing to: + (+) Initialize the RNG according to the specified parameters + in the RNG_InitTypeDef and create the associated handle + (+) DeInitialize the RNG peripheral + (+) Initialize the RNG MSP + (+) DeInitialize RNG MSP + +@endverbatim + * @{ + */ + +/** + * @brief Initializes the RNG peripheral and creates the associated handle. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_RNG_Init(RNG_HandleTypeDef *hrng) +{ + /* Check the RNG handle allocation */ + if(hrng == NULL) + { + return HAL_ERROR; + } + + __HAL_LOCK(hrng); + + if(hrng->State == HAL_RNG_STATE_RESET) + { + /* Allocate lock resource and initialize it */ + hrng->Lock = HAL_UNLOCKED; + /* Init the low level hardware */ + HAL_RNG_MspInit(hrng); + } + + /* Change RNG peripheral state */ + hrng->State = HAL_RNG_STATE_BUSY; + + /* Enable the RNG Peripheral */ + __HAL_RNG_ENABLE(hrng); + + /* Initialize the RNG state */ + hrng->State = HAL_RNG_STATE_READY; + + __HAL_UNLOCK(hrng); + + /* Return function status */ + return HAL_OK; +} + +/** + * @brief DeInitializes the RNG peripheral. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_RNG_DeInit(RNG_HandleTypeDef *hrng) +{ + /* Check the RNG handle allocation */ + if(hrng == NULL) + { + return HAL_ERROR; + } + /* Disable the RNG Peripheral */ + CLEAR_BIT(hrng->Instance->CR, RNG_CR_IE | RNG_CR_RNGEN); + + /* Clear RNG interrupt status flags */ + CLEAR_BIT(hrng->Instance->SR, RNG_SR_CEIS | RNG_SR_SEIS); + + /* DeInit the low level hardware */ + HAL_RNG_MspDeInit(hrng); + + /* Update the RNG state */ + hrng->State = HAL_RNG_STATE_RESET; + + /* Release Lock */ + __HAL_UNLOCK(hrng); + + /* Return the function status */ + return HAL_OK; +} + +/** + * @brief Initializes the RNG MSP. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval None + */ +__weak void HAL_RNG_MspInit(RNG_HandleTypeDef *hrng) +{ + /* NOTE : This function should not be modified. When the callback is needed, + function HAL_RNG_MspInit must be implemented in the user file. + */ +} + +/** + * @brief DeInitializes the RNG MSP. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval None + */ +__weak void HAL_RNG_MspDeInit(RNG_HandleTypeDef *hrng) +{ + /* NOTE : This function should not be modified. When the callback is needed, + function HAL_RNG_MspDeInit must be implemented in the user file. + */ +} + +/** + * @} + */ + +/** @addtogroup RNG_Exported_Functions_Group2 + * @brief Peripheral Control functions + * +@verbatim + =============================================================================== + ##### Peripheral Control functions ##### + =============================================================================== + [..] This section provides functions allowing to: + (+) Get the 32 bit Random number + (+) Get the 32 bit Random number with interrupt enabled + (+) Handle RNG interrupt request + +@endverbatim + * @{ + */ + +/** + * @brief Generates a 32-bit random number. + * @note Each time the random number data is read the RNG_FLAG_DRDY flag + * is automatically cleared. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @param random32bit: pointer to generated random number variable if successful. + * @retval HAL status + */ + +HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber(RNG_HandleTypeDef *hrng, uint32_t *random32bit) +{ + uint32_t tickstart = 0; + HAL_StatusTypeDef status = HAL_OK; + + /* Process Locked */ + __HAL_LOCK(hrng); + + /* Check RNG peripheral state */ + if(hrng->State == HAL_RNG_STATE_READY) + { + /* Change RNG peripheral state */ + hrng->State = HAL_RNG_STATE_BUSY; + + /* Get tick */ + tickstart = HAL_GetTick(); + + /* Check if data register contains valid random data */ + while(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) == RESET) + { + if((HAL_GetTick() - tickstart ) > RNG_TIMEOUT_VALUE) + { + hrng->State = HAL_RNG_STATE_ERROR; + + /* Process Unlocked */ + __HAL_UNLOCK(hrng); + + return HAL_TIMEOUT; + } + } + + /* Get a 32bit Random number */ + hrng->RandomNumber = hrng->Instance->DR; + *random32bit = hrng->RandomNumber; + + hrng->State = HAL_RNG_STATE_READY; + } + else + { + status = HAL_ERROR; + } + + /* Process Unlocked */ + __HAL_UNLOCK(hrng); + + return status; +} + +/** + * @brief Generates a 32-bit random number in interrupt mode. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval HAL status + */ +HAL_StatusTypeDef HAL_RNG_GenerateRandomNumber_IT(RNG_HandleTypeDef *hrng) +{ + HAL_StatusTypeDef status = HAL_OK; + + /* Process Locked */ + __HAL_LOCK(hrng); + + /* Check RNG peripheral state */ + if(hrng->State == HAL_RNG_STATE_READY) + { + /* Change RNG peripheral state */ + hrng->State = HAL_RNG_STATE_BUSY; + + /* Process Unlocked */ + __HAL_UNLOCK(hrng); + + /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */ + __HAL_RNG_ENABLE_IT(hrng); + } + else + { + /* Process Unlocked */ + __HAL_UNLOCK(hrng); + + status = HAL_ERROR; + } + + return status; +} + +/** + * @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 Returns generated random number in polling mode (Obsolete) + * Use HAL_RNG_GenerateRandomNumber() API instead. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval Random value + */ +uint32_t HAL_RNG_GetRandomNumber(RNG_HandleTypeDef *hrng) +{ + if(HAL_RNG_GenerateRandomNumber(hrng, &(hrng->RandomNumber)) == HAL_OK) + { + return hrng->RandomNumber; + } + else + { + return 0; + } +} + +/** + * @brief Returns a 32-bit random number with interrupt enabled (Obsolete), + * Use HAL_RNG_GenerateRandomNumber_IT() API instead. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval 32-bit random number + */ +uint32_t HAL_RNG_GetRandomNumber_IT(RNG_HandleTypeDef *hrng) +{ + uint32_t random32bit = 0; + + /* Process locked */ + __HAL_LOCK(hrng); + + /* Change RNG peripheral state */ + hrng->State = HAL_RNG_STATE_BUSY; + + /* Get a 32bit Random number */ + random32bit = hrng->Instance->DR; + + /* Enable the RNG Interrupts: Data Ready, Clock error, Seed error */ + __HAL_RNG_ENABLE_IT(hrng); + + /* Return the 32 bit random number */ + return random32bit; +} + +/** + * @brief Read latest generated random number. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval random value + */ +uint32_t HAL_RNG_ReadLastRandomNumber(RNG_HandleTypeDef *hrng) +{ + return(hrng->RandomNumber); +} + +/** + * @brief Data Ready callback in non-blocking mode. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @param random32bit: generated random number. + * @retval None + */ +__weak void HAL_RNG_ReadyDataCallback(RNG_HandleTypeDef *hrng, uint32_t random32bit) +{ + /* NOTE : This function should not be modified. When the callback is needed, + function HAL_RNG_ReadyDataCallback must be implemented in the user file. + */ +} + +/** + * @brief RNG error callbacks. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval None + */ +__weak void HAL_RNG_ErrorCallback(RNG_HandleTypeDef *hrng) +{ + /* NOTE : This function should not be modified. When the callback is needed, + function HAL_RNG_ErrorCallback must be implemented in the user file. + */ +} +/** + * @} + */ + + +/** @addtogroup RNG_Exported_Functions_Group3 + * @brief Peripheral State functions + * +@verbatim + =============================================================================== + ##### Peripheral State functions ##### + =============================================================================== + [..] + This subsection permits to get in run-time the status of the peripheral + and the data flow. + +@endverbatim + * @{ + */ + +/** + * @brief Returns the RNG state. + * @param hrng: pointer to a RNG_HandleTypeDef structure that contains + * the configuration information for RNG. + * @retval HAL state + */ +HAL_RNG_StateTypeDef HAL_RNG_GetState(RNG_HandleTypeDef *hrng) +{ + return hrng->State; +} + +/** + * @} + */ + +/** + * @} + */ + +#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */ + +#endif /* HAL_RNG_MODULE_ENABLED */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ -- cgit v1.2.3