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/**
******************************************************************************
* @file USB_Device/DFU_Standalone/Src/usbd_dfu_flash.c
* @author MCD Application Team
* @brief Memory management layer
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------ */
#include "usbd_dfu_flash.h"
#include "stm32f4xx_hal_conf.h"
/* Private typedef ----------------------------------------------------------- */
/* Private define ------------------------------------------------------------ */
#define FLASH_DESC_STR "@Internal Flash /0x08000000/02*016Ka,02*016Kg,01*064Kg,07*128Kg,04*016Kg,01*064Kg,07*128Kg"
#define FLASH_ERASE_TIME (uint16_t)50
#define FLASH_PROGRAM_TIME (uint16_t)50
/* Private macro ------------------------------------------------------------- */
/* Private variables --------------------------------------------------------- */
/* Private function prototypes ----------------------------------------------- */
static uint32_t GetSector(uint32_t Address);
static uint32_t GetBank(uint32_t Addr);
/* Extern function prototypes ------------------------------------------------ */
uint16_t Flash_If_Init(void);
uint16_t Flash_If_Erase(uint32_t Add);
uint16_t Flash_If_Write(uint8_t * src, uint8_t * dest, uint32_t Len);
uint8_t *Flash_If_Read(uint8_t * src, uint8_t * dest, uint32_t Len);
uint16_t Flash_If_DeInit(void);
uint16_t Flash_If_GetStatus(uint32_t Add, uint8_t Cmd, uint8_t * buffer);
USBD_DFU_MediaTypeDef USBD_DFU_Flash_fops = {
(uint8_t *) FLASH_DESC_STR,
Flash_If_Init,
Flash_If_DeInit,
Flash_If_Erase,
Flash_If_Write,
Flash_If_Read,
Flash_If_GetStatus,
};
/* Private functions --------------------------------------------------------- */
/**
* @brief Initializes Memory.
* @param None
* @retval 0 if operation is successful, MAL_FAIL else.
*/
uint16_t Flash_If_Init(void)
{
/* Unlock the internal flash */
HAL_FLASH_Unlock();
return 0;
}
/**
* @brief De-Initializes Memory.
* @param None
* @retval 0 if operation is successful, MAL_FAIL else.
*/
uint16_t Flash_If_DeInit(void)
{
/* Lock the internal flash */
HAL_FLASH_Lock();
return 0;
}
/**
* @brief Erases sector.
* @param Add: Address of sector to be erased.
* @retval 0 if operation is successful, MAL_FAIL else.
*/
uint16_t Flash_If_Erase(uint32_t Add)
{
uint32_t startsector = 0, sectorerror = 0;
/* Variable contains Flash operation status */
HAL_StatusTypeDef status;
FLASH_EraseInitTypeDef eraseinitstruct;
/* Get the number of sector */
startsector = GetSector(Add);
eraseinitstruct.TypeErase = FLASH_TYPEERASE_SECTORS;
eraseinitstruct.Banks = GetBank(Add);
eraseinitstruct.Sector = startsector;
eraseinitstruct.NbSectors = 1;
eraseinitstruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;
status = HAL_FLASHEx_Erase(&eraseinitstruct, §orerror);
if (status != HAL_OK)
{
return 1;
}
return 0;
}
/**
* @brief Writes Data into Memory.
* @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 Flash_If_Write(uint8_t * src, uint8_t * dest, uint32_t Len)
{
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 0;
}
/**
* @brief Reads Data into Memory.
* @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 *Flash_If_Read(uint8_t * src, uint8_t * dest, uint32_t Len)
{
uint32_t i = 0;
uint8_t *psrc = src;
for (i = 0; i < Len; i++)
{
dest[i] = *psrc++;
}
/* Return a valid address to avoid HardFault */
return (uint8_t *) (dest);
}
/**
* @brief Gets Memory Status.
* @param Add: Address to be read from.
* @param Cmd: Number of data to be read (in bytes).
* @retval 0 if operation is successful
*/
uint16_t Flash_If_GetStatus(uint32_t Add, uint8_t Cmd, uint8_t * buffer)
{
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 0;
}
/**
* @brief Gets the sector of a given address
* @param Address Address of the FLASH Memory
* @retval The sector of a given address
*/
static uint32_t GetSector(uint32_t Address)
{
uint32_t sector = 0;
if ((Address < ADDR_FLASH_SECTOR_1) && (Address >= ADDR_FLASH_SECTOR_0))
{
sector = FLASH_SECTOR_0;
}
else if ((Address < ADDR_FLASH_SECTOR_2) && (Address >= ADDR_FLASH_SECTOR_1))
{
sector = FLASH_SECTOR_1;
}
else if ((Address < ADDR_FLASH_SECTOR_3) && (Address >= ADDR_FLASH_SECTOR_2))
{
sector = FLASH_SECTOR_2;
}
else if ((Address < ADDR_FLASH_SECTOR_4) && (Address >= ADDR_FLASH_SECTOR_3))
{
sector = FLASH_SECTOR_3;
}
else if ((Address < ADDR_FLASH_SECTOR_5) && (Address >= ADDR_FLASH_SECTOR_4))
{
sector = FLASH_SECTOR_4;
}
else if ((Address < ADDR_FLASH_SECTOR_6) && (Address >= ADDR_FLASH_SECTOR_5))
{
sector = FLASH_SECTOR_5;
}
else if ((Address < ADDR_FLASH_SECTOR_7) && (Address >= ADDR_FLASH_SECTOR_6))
{
sector = FLASH_SECTOR_6;
}
else
{
sector = FLASH_SECTOR_7;
}
return sector;
}
/**
* @brief Gets the bank of a given address
* @param Addr: Address of the FLASH Memory
* @retval The bank of a given address
*/
static uint32_t GetBank(uint32_t Addr)
{
uint32_t bank = 0;
/* Sector in bank 1 */
bank = FLASH_BANK_1;
return bank;
}