485使用DMA完成不定长字节输入输出

/** ****************************************************************************** * @file stm32f7xx_hal_cryp_ex.c * @author MCD Application Team * @brief Extended CRYP HAL module driver * This file provides firmware functions to manage the following * functionalities of CRYP extension peripheral: * + Extended AES processing functions * @verbatim ============================================================================== ##### How to use this driver ##### ============================================================================== [..] The CRYP Extension HAL driver can be used as follows: (#)Initialize the CRYP low level resources by implementing the HAL_CRYP_MspInit(): (##) Enable the CRYP interface clock using __HAL_RCC_CRYP_CLK_ENABLE() (##) In case of using interrupts (e.g. HAL_CRYPEx_AESGCM_Encrypt_IT()) (+++) Configure the CRYP interrupt priority using HAL_NVIC_SetPriority() (+++) Enable the CRYP IRQ handler using HAL_NVIC_EnableIRQ() (+++) In CRYP IRQ handler, call HAL_CRYP_IRQHandler() (##) In case of using DMA to control data transfer (e.g. HAL_AES_ECB_Encrypt_DMA()) (+++) Enable the DMAx interface clock using __DMAx_CLK_ENABLE() (+++) Configure and enable two DMA streams one for managing data transfer from memory to peripheral (input stream) and another stream for managing data transfer from peripheral to memory (output stream) (+++) Associate the initialized DMA handle to the CRYP DMA handle using __HAL_LINKDMA() (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the two DMA Streams. The output stream should have higher priority than the input stream HAL_NVIC_SetPriority() and HAL_NVIC_EnableIRQ() (#)Initialize the CRYP HAL using HAL_CRYP_Init(). This function configures mainly: (##) The data type: 1-bit, 8-bit, 16-bit and 32-bit (##) The key size: 128, 192 and 256. This parameter is relevant only for AES (##) The encryption/decryption key. Its size depends on the algorithm used for encryption/decryption (##) The initialization vector (counter). It is not used ECB mode. (#)Three processing (encryption/decryption) functions are available: (##) Polling mode: encryption and decryption APIs are blocking functions i.e. they process the data and wait till the processing is finished e.g. HAL_CRYPEx_AESGCM_Encrypt() (##) Interrupt mode: encryption and decryption APIs are not blocking functions i.e. they process the data under interrupt e.g. HAL_CRYPEx_AESGCM_Encrypt_IT() (##) DMA mode: encryption and decryption APIs are not blocking functions i.e. the data transfer is ensured by DMA e.g. HAL_CRYPEx_AESGCM_Encrypt_DMA() (#)When the processing function is called at first time after HAL_CRYP_Init() the CRYP peripheral is initialized and processes the buffer in input. At second call, the processing function performs an append of the already processed buffer. When a new data block is to be processed, call HAL_CRYP_Init() then the processing function. (#)In AES-GCM and AES-CCM modes are an authenticated encryption algorithms which provide authentication messages. HAL_AES_GCM_Finish() and HAL_AES_CCM_Finish() are used to provide those authentication messages. Call those functions after the processing ones (polling, interrupt or DMA). e.g. in AES-CCM mode call HAL_CRYPEx_AESCCM_Encrypt() to encrypt the plain data then call HAL_CRYPEx_AESCCM_Finish() to get the authentication message -@- For CCM Encrypt/Decrypt API's, only DataType = 8-bit is supported by this version. -@- The HAL_CRYPEx_AESGCM_xxxx() implementation is limited to 32bits inputs data length (Plain/Cyphertext, Header) compared with GCM standards specifications (800-38D). (#)Call HAL_CRYP_DeInit() to deinitialize the CRYP peripheral. @endverbatim ****************************************************************************** * @attention * * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2> * * 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 "stm32f7xx_hal.h" /** @addtogroup STM32F7xx_HAL_Driver * @{ */ /** @defgroup CRYPEx CRYPEx * @brief CRYP Extension HAL module driver. * @{ */ #ifdef HAL_CRYP_MODULE_ENABLED #if defined (CRYP) /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /** @addtogroup CRYPEx_Private_define * @{ */ #define CRYPEx_TIMEOUT_VALUE 1 /** * @} */ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /** @defgroup CRYPEx_Private_Functions_prototypes CRYP Private Functions Prototypes * @{ */ static void CRYPEx_GCMCCM_SetInitVector(CRYP_HandleTypeDef *hcryp, uint8_t *InitVector); static void CRYPEx_GCMCCM_SetKey(CRYP_HandleTypeDef *hcryp, uint8_t *Key, uint32_t KeySize); static HAL_StatusTypeDef CRYPEx_GCMCCM_ProcessData(CRYP_HandleTypeDef *hcryp, uint8_t *Input, uint16_t Ilength, uint8_t *Output, uint32_t Timeout); static HAL_StatusTypeDef CRYPEx_GCMCCM_SetHeaderPhase(CRYP_HandleTypeDef *hcryp, uint8_t* Input, uint16_t Ilength, uint32_t Timeout); static void CRYPEx_GCMCCM_DMAInCplt(DMA_HandleTypeDef *hdma); static void CRYPEx_GCMCCM_DMAOutCplt(DMA_HandleTypeDef *hdma); static void CRYPEx_GCMCCM_DMAError(DMA_HandleTypeDef *hdma); static void CRYPEx_GCMCCM_SetDMAConfig(CRYP_HandleTypeDef *hcryp, uint32_t inputaddr, uint16_t Size, uint32_t outputaddr); /** * @} */ /* Private functions ---------------------------------------------