STM32 USB IAP

　

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使用STM32 USB IAP

使用stm32的usb做IAP升级功能，利用stm32cubemx生成代码。参考http://www.51hei.com/bbs/dpj-40235-1.html http://www.51hei.com/bbs/dpj-40938-1.html http://www.stm32cube.com/question/500

关键操作：

1.配置应用程序起始地址:0x8008000.打算使用32k空间作为boot程序空间，所以应用程序地址=起始地址+32k(0x8000)=0x8008000;

2.flash属性设置：由于使用的stm32F103zet6的flash是2k一页，共256页。所以前16页只读，后面240页可读写擦除。所以设置为16*02Ka,240*02Kg

3.生成代码后需增加usbd_dfu_if.c各函数内容如下：

在MEM_If_erase_FS（）函数中需特殊注意擦除地址为应用程序起始地址0x8008000，页数为总页数-boot占用的页数。

/**
  ******************************************************************************
  * @file           : usbd_dfu_if.c
  * @brief          :
  ******************************************************************************
  *
  * Copyright (c) 2017 STMicroelectronics International N.V. 
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without 
  * modification, are permitted, provided that the following conditions are met:
  *
  * 1. Redistribution 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 other 
  *    contributors to this software may be used to endorse or promote products 
  *    derived from this software without specific written permission.
  * 4. This software, including modifications and/or derivative works of this 
  *    software, must execute solely and exclusively on microcontroller or
  *    microprocessor devices manufactured by or for STMicroelectronics.
  * 5. Redistribution and use of this software other than as permitted under 
  *    this license is void and will automatically terminate your rights under 
  *    this license. 
  *
  * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 
  * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 
  * limitED TO, THE IMPLIED WARRANTIES OF MERCHANTAbility, FITNESS FOR A 
  * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
  * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 
  * SHALL STMICROELECTRONICS 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 "usbd_dfu_if.h"
/* USER CODE BEGIN INCLUDE */
/* USER CODE END INCLUDE */

/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
  * @{
  */
/** @defgroup USBD_DFU 
  * @brief usbd core module
  * @{
  */ 

/** @defgroup USBD_DFU_Private_typesDefinitions
  * @{
  */ 
/* USER CODE BEGIN PRIVATE_TYPES */
/* USER CODE END PRIVATE_TYPES */ 
/**
  * @}
  */ 

/** @defgroup USBD_DFU_Private_defines
  * @{
  */ 
#define FLASH_DESC_STR      "@Internal Flash   /0x08000000/16*02Ka,240*02Kg"  
/* USER CODE BEGIN PRIVATE_DEFINES */
/* USER CODE END PRIVATE_DEFINES */

/**
  * @}
  */ 

/** @defgroup USBD_DFU_Private_Macros
  * @{
  */ 
/* USER CODE BEGIN PRIVATE_MACRO */
/* USER CODE END PRIVATE_MACRO */

/**
  * @}
  */ 

/** @defgroup USBD_AUDIO_IF_Private_Variables
  * @{
  */
/* USER CODE BEGIN PRIVATE_VARIABLES */
/* USER CODE END PRIVATE_VARIABLES */

/**
  * @}
  */ 

/** @defgroup USBD_DFU_IF_exported_Variables
  * @{
  */ 
  extern USBD_handleTypeDef hUsbDeviceFS;
/* USER CODE BEGIN EXPORTED_VARIABLES */
/* USER CODE END EXPORTED_VARIABLES */

/**
  * @}
  */ 

/** @defgroup USBD_DFU_Private_Functionprototypes
  * @{
  */
static uint16_t MEM_If_Init_FS(void);
static uint16_t MEM_If_Erase_FS (uint32_t Add);
static uint16_t MEM_If_Write_FS (uint8_t *src, uint8_t *dest, uint32_t Len);
static uint8_t *MEM_If_Read_FS  (uint8_t *src, uint8_t *dest, uint32_t Len);
static uint16_t MEM_If_DeInit_FS(void);
static uint16_t MEM_If_GetStatus_FS (uint32_t Add, uint8_t Cmd, uint8_t *buffer);

/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */
/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */

/**
  * @}
  */ 

#if defined ( __ICCARM__ ) /*!< IAR Compiler */
  #pragma data_alignment=4   
#endif
__ALIGN_BEGIN USBD_DFU_MediaTypeDef USBD_DFU_fops_FS __ALIGN_END =
{
   (uint8_t*)FLASH_DESC_STR,
    MEM_If_Init_FS,
    MEM_If_DeInit_FS,
    MEM_If_Erase_FS,
    MEM_If_Write_FS,
    MEM_If_Read_FS,
    MEM_If_GetStatus_FS,   
};

/* Private functions ---------------------------------------------------------*/
/**
  * @brief  MEM_If_Init_FS
  *         Memory initialization routine.
  * @param  None
  * @retval 0 if operation is successful, MAL_FAIL else.
  */
uint16_t MEM_If_Init_FS(void)
{ 
  /* USER CODE BEGIN 0 */
    HAL_FLASH_Unlock();
  __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_BSY | FLASH_FLAG_WRPERR |FLASH_FLAG_PGERR);    
  return (USBD_OK);
  /* USER CODE END 0 */ 
}

/**
  * @brief  MEM_If_DeInit_FS
  *         De-Initializes Memory.
  * @param  None
  * @retval 0 if operation is successful, MAL_FAIL else.
  */
uint16_t MEM_If_DeInit_FS(void)
{ 
  /* USER CODE BEGIN 1 */ 
    HAL_FLASH_Lock();
  return (USBD_OK);
  /* USER CODE END 1 */ 
}

/**
  * @brief  MEM_If_Erase_FS
  *         Erase sector.
  * @param  Add: Address of sector to be erased.
  * @retval 0 if operation is successful, MAL_FAIL else.
  */
uint16_t MEM_If_Erase_FS(uint32_t Add)
{
  /* USER CODE BEGIN 2 */ 
//  uint32_t UserStartSector;
    uint32_t SectorERROR;
    FLASH_EraseInitTypeDef pEraseInit;

    /* Unlock the Flash to enable the flash control register access *************/
    MEM_If_Init_FS();

    /* Get the sector where start the user flash area */


    pEraseInit.TypeErase = FLASH_TYPEERASE_PAGES;
    pEraseInit.PageAddress = USBD_DFU_APP_DEFAULT_ADD;
    pEraseInit.NbPages = 240;

    if (HAL_FLASHEx_Erase(&pEraseInit, &SectorError) != HAL_OK)
    {
        /* error occurred while page erase */
        return (1);
    }
  return (USBD_OK);
  /* USER CODE END 2 */ 
}

/**
  * @brief  MEM_If_Write_FS
  *         Memory write routine.
  * @param  src: Pointer to the source buffer. Address to be written to.
  * @param  dest: Pointer to the destination buffer.
  * @param  Len: Number of data to be written (in bytes).
  * @retval 0 if operation is successful, MAL_FAIL else.
  */
uint16_t MEM_If_Write_FS(uint8_t *src, uint8_t *dest, uint32_t Len)
{
  /* USER CODE BEGIN 3 */ 
    uint32_t i = 0;

    for(i = 0; i < Len; i+=4)
    {
        /* Device voltage range supposed to be [2.7V to 3.6V], the operation will
           be done by byte */
        if(HAL_FLASH_Program(FLASH_TYPEPROGRAM_word, (uint32_t)(dest+i), *(uint32_t*)(src+i)) == HAL_OK)
        {
            /* Check the written value */
            if(*(uint32_t *)(src + i) != *(uint32_t*)(dest+i))
            {
                /* Flash content doesn't match SRAM content */
                return 2;
            }
        }
        else
        {
            /* Error occurred while writing data in Flash memory */
            return 1;
        }
    }

  return (USBD_OK);
  /* USER CODE END 3 */ 
}

/**
  * @brief  MEM_If_Read_FS
  *         Memory read routine.
  * @param  src: Pointer to the source buffer. Address to be written to.
  * @param  dest: Pointer to the destination buffer.
  * @param  Len: Number of data to be read (in bytes).
  * @retval Pointer to the physical address where data should be read.
  */
uint8_t *MEM_If_Read_FS (uint8_t *src, uint8_t *dest, uint32_t Len)
{
  /* Return a valid address to avoid HardFault */
  /* USER CODE BEGIN 4 */ 
       uint32_t i = 0;
    uint8_t *psrc = src;

    for(i = 0; i < Len; i++)
    {
        dest[i] = *psrc++;
    }
    return (uint8_t*)(dest);
//  return (uint8_t*)(USBD_OK);
  /* USER CODE END 4 */ 
}

/**
  * @brief  Flash_If_GetStatus_FS
  *         Get status routine.
  * @param  Add: Address to be read from.
  * @param  Cmd: Number of data to be read (in bytes).
  * @param  buffer: used for returning the time necessary for a program or an erase operation
  * @retval 0 if operation is successful
  */
uint16_t MEM_If_GetStatus_FS (uint32_t Add, uint8_t Cmd, uint8_t *buffer)
{
  /* USER CODE BEGIN 5 */ 
    uint16_t FLASH_PROGRAM_TIME = 50;
    uint16_t FLASH_ERASE_TIME = 50;

  switch (Cmd)
  {
  case DFU_MEDIA_PROGRAM:
                buffer[1] = (uint8_t)FLASH_PROGRAM_TIME;
        buffer[2] = (uint8_t)(FLASH_PROGRAM_TIME << 8);
        buffer[3] = 0;
    break;

  case DFU_MEDIA_ERASE:
  default:
                buffer[1] = (uint8_t)FLASH_ERASE_TIME;
        buffer[2] = (uint8_t)(FLASH_ERASE_TIME << 8);
        buffer[3] = 0;
    break;
  }                             
  return  (USBD_OK);
  /* USER CODE END 5 */  
}

/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */
/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */

/**
  * @}
  */ 

/**
  * @}
  */  
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

在main.c中加入：

int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();

  /* USER CODE BEGIN 2 */
    if(HAL_GPIO_ReadPin( KEY0_GPIO_Port , KEY0_Pin ) != GPIO_PIN_RESET)
  {
      /* Test if user code is programmed starting from USBD_DFU_APP_DEFAULT_ADD address */
      if(((*(__IO uint32_t*)USBD_DFU_APP_DEFAULT_ADD) & 0x2FFE0000 ) == 0x20000000)
      {
          /* Jump to user application */
          JumpAddress = *(__IO uint32_t*) (USBD_DFU_APP_DEFAULT_ADD + 4);
          JumpToApplication = (pFunction) JumpAddress;

          /* Initialize user application's Stack Pointer */
          __set_MSP(*(__IO uint32_t*) USBD_DFU_APP_DEFAULT_ADD);
          JumpToApplication();
      }
  }

  MX_USB_DEVICE_Init();
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

  }
  /* USER CODE END 3 */

}

编译烧录ok。

再生成app，需修改成这样:

并且修改宏#define VECT_TAB_offset 0x8000，将应用程序中断向量表重映射到正确地址。

再使用DfuFileMgr转为dfu文件，然后使用DfuSeDemo升级即可；

以上是STM32F103zet6的操作，在STM32F0系列中有所不同。

由于M0并没有SCB->VTOR，所以无法直接在应用程序中直接修改VECT_TAB_OFFSET 来改变中断表。所以采用将表放入ram中。

关键操作：

1.将中断表复制到ram起始地址0x20000000,共48*4字节

2.配置存储地址的映射，存储地址的映射，即把SRAM映射到代码执行区的地址0X00处。SYSCFG_CFGR1|=3;

3.在工程设置中将已占用的ram让出来。其他操作与F103相同。

附F103zet6工程，http://pan.baidu.com/s/1hsBVCjU 3mfx

官方文档 http://pan.baidu.com/s/1kViJp1H, xki6

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