77 lines
3.2 KiB
Plaintext
77 lines
3.2 KiB
Plaintext
/**
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@page HASH_SHA1MD5_DMA HASH digest calculation using SHA1 and MD5 example
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with DMA transfer.
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file HASH/HASH_SHA1MD5_DMA/Readme.txt
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* @author MCD Application Team
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* @brief Description of the HASH digest calculation using SHA1 and MD5 example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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How to use the HASH peripheral to hash data using SHA-1 and MD5 algorithms
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when data are fed to the HASH unit with DMA.
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For this example, DMA is used to transfer data from memory to the HASH processor.
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The message to hash is a 2048 bit data.
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The SHA-1 message digest result is a 160 bit data, and the MD5 message digest
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result is a 128 bit data.
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The expected HASH digests (for SHA1 and MD5) are already computed using an online
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HASH tool. Those values are compared to those computed by the HASH peripheral.
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In case there is a mismatch the red LED is turned ON.
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In case the SHA1 digest is computed correctly the green LED (LED1) is turned ON.
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In case the MD5 digest is computed correctly the blue LED (LED4) is turned ON.
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
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to have correct HAL operation.
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@par Directory contents
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- HASH/HASH_SHA1MD5_DMA/Inc/stm32f2xx_hal_conf.h HAL configuration file
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- HASH/HASH_SHA1MD5_DMA/Inc/stm32f2xx_it.h Interrupt handlers header file
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- HASH/HASH_SHA1MD5_DMA/Inc/main.h Main program header file
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- HASH/HASH_SHA1MD5_DMA/Src/stm32f2xx_it.c Interrupt handlers
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- HASH/HASH_SHA1MD5_DMA/Src/main.c Main program
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- HASH/HASH_SHA1MD5_DMA/Src/stm32f2xx_hal_msp.c HAL MSP module
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- HASH/HASH_SHA1MD5_DMA/Src/system_stm32f2xx.c STM32F2xx system clock configuration file
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@par Hardware and Software environment
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- This example runs on STM32F217xx devices.
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- This example has been tested with STMicroelectronics STM3221G-EVAL RevC
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evaluation boards and can be easily tailored to any other supported device
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and development board.
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@par How to use it ?
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In order to make the program work, you must do the following :
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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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*/
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