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Refs #1294. Added checks to the STM32F7 flash driver to make sure flash operations are only performed when configured in single bank mode. 

git-svn-id: https://svn.code.sf.net/p/openblt/code/trunk@879 5dc33758-31d5-4daf-9ae8-b24bf3d40d73
This commit is contained in:
Frank Voorburg 2021-06-29 10:45:51 +00:00
parent 307ed14b00
commit 77631561d1
1 changed files with 47 additions and 1 deletions
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48
Target/Source/ARMCM7_STM32F7/flash.c
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@ -114,6 +114,7 @@ static blt_bool FlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
static blt_bool FlashWriteBlock(tFlashBlockInfo *block);
static blt_bool FlashEraseSectors(blt_int8u first_sector, blt_int8u last_sector);
static blt_int8u FlashGetSector(blt_addr address);
static blt_bool FlashIsSingleBankMode(void);
/****************************************************************************************
@ -628,6 +629,15 @@ static blt_bool FlashWriteBlock(tFlashBlockInfo *block)
}
}
#endif
/* this flash driver currently supports single bank mode. report an error if it is
* configured in dual bank mode. otherwise a tricky to debug hard fault might happen.
*/
if (FlashIsSingleBankMode() == BLT_FALSE)
{
/* cannot perform flash operation, because it is configured in dual bank mode. */
return BLT_FALSE;
}
/* unlock the flash peripheral to enable the flash control register access. */
HAL_FLASH_Unlock();
@ -685,7 +695,16 @@ static blt_bool FlashEraseSectors(blt_int8u first_sector, blt_int8u last_sector)
{
result = BLT_FALSE;
}
/* this flash driver currently supports single bank mode. report an error if it is
* configured in dual bank mode. otherwise a tricky to debug hard fault might happen.
*/
if (FlashIsSingleBankMode() == BLT_FALSE)
{
/* cannot perform flash operation, because it is configured in dual bank mode. */
result = BLT_FALSE;
}
/* only move forward with the erase operation if all is okay so far */
if (result == BLT_TRUE)
{
@ -755,4 +774,31 @@ static blt_int8u FlashGetSector(blt_addr address)
} /*** end of FlashGetSector ***/
/************************************************************************************//**
** \brief Determines the flash is configured in single bank mode, which is required
** by this flash driver.
** \return BLT_TRUE if the flash is in single bank mode, BLT_FALSE otherwise.
**
****************************************************************************************/
static blt_bool FlashIsSingleBankMode(void)
{
blt_bool result = BLT_TRUE;
/* dual bank mode is only available on certain STM32F7 variants. for these variants,
* macro FLASH_OPTCR_nDBANK is defined in the HAL.
*/
#if defined (FLASH_OPTCR_nDBANK)
/* check if the flash is NOT in single bank mode. */
if ((FLASH->OPTCR & FLASH_OPTCR_nDBANK) == 0)
{
/* update the result to indicate that the flash is not in single bank mode. */
result = BLT_FALSE;
}
#endif /* FLASH_OPTCR_nDBANK */
/* give the result back to the caller. */
return result;
} /*** end of FlashIsSingleBankMode ***/
/*********************************** end of flash.c ************************************/