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Diffstat (limited to 'stm/stmperiph/stm32f4xx_rng.c')
| -rw-r--r-- | stm/stmperiph/stm32f4xx_rng.c | 397 |
1 files changed, 0 insertions, 397 deletions
diff --git a/stm/stmperiph/stm32f4xx_rng.c b/stm/stmperiph/stm32f4xx_rng.c deleted file mode 100644 index 4746dd6bda..0000000000 --- a/stm/stmperiph/stm32f4xx_rng.c +++ /dev/null @@ -1,397 +0,0 @@ -/**
- ******************************************************************************
- * @file stm32f4xx_rng.c
- * @author MCD Application Team
- * @version V1.3.0
- * @date 08-November-2013
- * @brief This file provides firmware functions to manage the following
- * functionalities of the Random Number Generator (RNG) peripheral:
- * + Initialization and Configuration
- * + Get 32 bit Random number
- * + Interrupts and flags management
- *
-@verbatim
-
- ===================================================================
- ##### How to use this driver #####
- ===================================================================
- [..]
- (#) Enable The RNG controller clock using
- RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE) function.
-
- (#) Activate the RNG peripheral using RNG_Cmd() function.
-
- (#) Wait until the 32 bit Random number Generator contains a valid random data
- (using polling/interrupt mode). For more details, refer to "Interrupts and
- flags management functions" module description.
-
- (#) Get the 32 bit Random number using RNG_GetRandomNumber() function
-
- (#) To get another 32 bit Random number, go to step 3.
-
-
-@endverbatim
- *
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
- *
- * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
- * You may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.st.com/software_license_agreement_liberty_v2
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- ******************************************************************************
- */
-
-/* Includes ------------------------------------------------------------------*/
-#include "stm32f4xx_rng.h"
-#include "stm32f4xx_rcc.h"
-
-/** @addtogroup STM32F4xx_StdPeriph_Driver
- * @{
- */
-
-/** @defgroup RNG
- * @brief RNG driver modules
- * @{
- */
-
-/* Private typedef -----------------------------------------------------------*/
-/* Private define ------------------------------------------------------------*/
-/* Private macro -------------------------------------------------------------*/
-/* Private variables ---------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/** @defgroup RNG_Private_Functions
- * @{
- */
-
-/** @defgroup RNG_Group1 Initialization and Configuration functions
- * @brief Initialization and Configuration functions
- *
-@verbatim
- ===============================================================================
- ##### Initialization and Configuration functions #####
- ===============================================================================
- [..] This section provides functions allowing to
- (+) Initialize the RNG peripheral
- (+) Enable or disable the RNG peripheral
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief De-initializes the RNG peripheral registers to their default reset values.
- * @param None
- * @retval None
- */
-void RNG_DeInit(void)
-{
- /* Enable RNG reset state */
- RCC_AHB2PeriphResetCmd(RCC_AHB2Periph_RNG, ENABLE);
-
- /* Release RNG from reset state */
- RCC_AHB2PeriphResetCmd(RCC_AHB2Periph_RNG, DISABLE);
-}
-
-/**
- * @brief Enables or disables the RNG peripheral.
- * @param NewState: new state of the RNG peripheral.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void RNG_Cmd(FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the RNG */
- RNG->CR |= RNG_CR_RNGEN;
- }
- else
- {
- /* Disable the RNG */
- RNG->CR &= ~RNG_CR_RNGEN;
- }
-}
-/**
- * @}
- */
-
-/** @defgroup RNG_Group2 Get 32 bit Random number function
- * @brief Get 32 bit Random number function
- *
-
-@verbatim
- ===============================================================================
- ##### Get 32 bit Random number function #####
- ===============================================================================
- [..] This section provides a function allowing to get the 32 bit Random number
-
- (@) Before to call this function you have to wait till DRDY flag is set,
- using RNG_GetFlagStatus(RNG_FLAG_DRDY) function.
-
-@endverbatim
- * @{
- */
-
-
-/**
- * @brief Returns a 32-bit random number.
- *
- * @note Before to call this function you have to wait till DRDY (data ready)
- * flag is set, using RNG_GetFlagStatus(RNG_FLAG_DRDY) function.
- * @note Each time the the Random number data is read (using RNG_GetRandomNumber()
- * function), the RNG_FLAG_DRDY flag is automatically cleared.
- * @note In the case of a seed error, the generation of random numbers is
- * interrupted for 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 RNG_ClearFlag(RNG_FLAG_SECS) function), then disable
- * and enable the RNG peripheral (using RNG_Cmd() function) to
- * reinitialize and restart the RNG.
- * @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 have
- * to check that the clock controller is correctly configured to provide
- * the RNG clock and clear the CEIS bit (using RNG_ClearFlag(RNG_FLAG_CECS)
- * function) . The clock error has no impact on the previously generated
- * random numbers, and the RNG_DR register contents can be used.
- *
- * @param None
- * @retval 32-bit random number.
- */
-uint32_t RNG_GetRandomNumber(void)
-{
- /* Return the 32 bit random number from the DR register */
- return RNG->DR;
-}
-
-
-/**
- * @}
- */
-
-/** @defgroup RNG_Group3 Interrupts and flags management functions
- * @brief Interrupts and flags management functions
- *
-@verbatim
- ===============================================================================
- ##### Interrupts and flags management functions #####
- ===============================================================================
-
- [..] This section provides functions allowing to configure the RNG Interrupts and
- to get the status and clear flags and Interrupts pending bits.
-
- [..] The RNG provides 3 Interrupts sources and 3 Flags:
-
- *** Flags : ***
- ===============
- [..]
- (#) RNG_FLAG_DRDY : In the case of the RNG_DR register contains valid
- random data. it is cleared by reading the valid data(using
- RNG_GetRandomNumber() function).
-
- (#) RNG_FLAG_CECS : In the case of a seed error detection.
-
- (#) RNG_FLAG_SECS : In the case of a clock error detection.
-
- *** Interrupts ***
- ==================
- [..] If enabled, an RNG interrupt is pending :
-
- (#) In the case of the RNG_DR register contains valid random data.
- This interrupt source is cleared once the RNG_DR register has been read
- (using RNG_GetRandomNumber() function) until a new valid value is
- computed; or
- (#) In the case of a seed error : One of the following faulty sequences has
- been detected:
- (++) More than 64 consecutive bits at the same value (0 or 1)
- (++) More than 32 consecutive alternance of 0 and 1 (0101010101...01)
- This interrupt source is cleared using RNG_ClearITPendingBit(RNG_IT_SEI)
- function; or
- (#) In the case of a clock error : the PLL48CLK (RNG peripheral clock source)
- was not correctly detected (fPLL48CLK< fHCLK/16). This interrupt source is
- cleared using RNG_ClearITPendingBit(RNG_IT_CEI) function.
- -@- note In this case, User have to check that the clock controller is
- correctly configured to provide the RNG clock.
-
- *** Managing the RNG controller events : ***
- ============================================
- [..] The user should identify which mode will be used in his application to manage
- the RNG controller events: Polling mode or Interrupt mode.
-
- (#) In the Polling Mode it is advised to use the following functions:
- (++) RNG_GetFlagStatus() : to check if flags events occur.
- (++) RNG_ClearFlag() : to clear the flags events.
-
- -@@- RNG_FLAG_DRDY can not be cleared by RNG_ClearFlag(). it is cleared only
- by reading the Random number data.
-
- (#) In the Interrupt Mode it is advised to use the following functions:
- (++) RNG_ITConfig() : to enable or disable the interrupt source.
- (++) RNG_GetITStatus() : to check if Interrupt occurs.
- (++) RNG_ClearITPendingBit() : to clear the Interrupt pending Bit
- (corresponding Flag).
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables the RNG interrupt.
- * @note The RNG provides 3 interrupt sources,
- * - Computed data is ready event (DRDY), and
- * - Seed error Interrupt (SEI) and
- * - Clock error Interrupt (CEI),
- * all these interrupts sources are enabled by setting the IE bit in
- * CR register. However, each interrupt have its specific status bit
- * (see RNG_GetITStatus() function) and clear bit except the DRDY event
- * (see RNG_ClearITPendingBit() function).
- * @param NewState: new state of the RNG interrupt.
- * This parameter can be: ENABLE or DISABLE.
- * @retval None
- */
-void RNG_ITConfig(FunctionalState NewState)
-{
- /* Check the parameters */
- assert_param(IS_FUNCTIONAL_STATE(NewState));
-
- if (NewState != DISABLE)
- {
- /* Enable the RNG interrupt */
- RNG->CR |= RNG_CR_IE;
- }
- else
- {
- /* Disable the RNG interrupt */
- RNG->CR &= ~RNG_CR_IE;
- }
-}
-
-/**
- * @brief Checks whether the specified RNG flag is set or not.
- * @param RNG_FLAG: specifies the RNG flag to check.
- * This parameter can be one of the following values:
- * @arg RNG_FLAG_DRDY: Data Ready flag.
- * @arg RNG_FLAG_CECS: Clock Error Current flag.
- * @arg RNG_FLAG_SECS: Seed Error Current flag.
- * @retval The new state of RNG_FLAG (SET or RESET).
- */
-FlagStatus RNG_GetFlagStatus(uint8_t RNG_FLAG)
-{
- FlagStatus bitstatus = RESET;
- /* Check the parameters */
- assert_param(IS_RNG_GET_FLAG(RNG_FLAG));
-
- /* Check the status of the specified RNG flag */
- if ((RNG->SR & RNG_FLAG) != (uint8_t)RESET)
- {
- /* RNG_FLAG is set */
- bitstatus = SET;
- }
- else
- {
- /* RNG_FLAG is reset */
- bitstatus = RESET;
- }
- /* Return the RNG_FLAG status */
- return bitstatus;
-}
-
-
-/**
- * @brief Clears the RNG flags.
- * @param RNG_FLAG: specifies the flag to clear.
- * This parameter can be any combination of the following values:
- * @arg RNG_FLAG_CECS: Clock Error Current flag.
- * @arg RNG_FLAG_SECS: Seed Error Current flag.
- * @note RNG_FLAG_DRDY can not be cleared by RNG_ClearFlag() function.
- * This flag is cleared only by reading the Random number data (using
- * RNG_GetRandomNumber() function).
- * @retval None
- */
-void RNG_ClearFlag(uint8_t RNG_FLAG)
-{
- /* Check the parameters */
- assert_param(IS_RNG_CLEAR_FLAG(RNG_FLAG));
- /* Clear the selected RNG flags */
- RNG->SR = ~(uint32_t)(((uint32_t)RNG_FLAG) << 4);
-}
-
-/**
- * @brief Checks whether the specified RNG interrupt has occurred or not.
- * @param RNG_IT: specifies the RNG interrupt source to check.
- * This parameter can be one of the following values:
- * @arg RNG_IT_CEI: Clock Error Interrupt.
- * @arg RNG_IT_SEI: Seed Error Interrupt.
- * @retval The new state of RNG_IT (SET or RESET).
- */
-ITStatus RNG_GetITStatus(uint8_t RNG_IT)
-{
- ITStatus bitstatus = RESET;
- /* Check the parameters */
- assert_param(IS_RNG_GET_IT(RNG_IT));
-
- /* Check the status of the specified RNG interrupt */
- if ((RNG->SR & RNG_IT) != (uint8_t)RESET)
- {
- /* RNG_IT is set */
- bitstatus = SET;
- }
- else
- {
- /* RNG_IT is reset */
- bitstatus = RESET;
- }
- /* Return the RNG_IT status */
- return bitstatus;
-}
-
-
-/**
- * @brief Clears the RNG interrupt pending bit(s).
- * @param RNG_IT: specifies the RNG interrupt pending bit(s) to clear.
- * This parameter can be any combination of the following values:
- * @arg RNG_IT_CEI: Clock Error Interrupt.
- * @arg RNG_IT_SEI: Seed Error Interrupt.
- * @retval None
- */
-void RNG_ClearITPendingBit(uint8_t RNG_IT)
-{
- /* Check the parameters */
- assert_param(IS_RNG_IT(RNG_IT));
-
- /* Clear the selected RNG interrupt pending bit */
- RNG->SR = (uint8_t)~RNG_IT;
-}
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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