/****************************************************************************************
| Description: bootloader flash driver source file
| File Name: flash.c
|
|----------------------------------------------------------------------------------------
| C O P Y R I G H T
|----------------------------------------------------------------------------------------
| Copyright (c) 2012 by Feaser http://www.feaser.com All rights reserved
|
|----------------------------------------------------------------------------------------
| L I C E N S E
|----------------------------------------------------------------------------------------
| This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
| modify it under the terms of the GNU General Public License as published by the Free
| Software Foundation, either version 3 of the License, or (at your option) any later
| version.
|
| OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
| without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
| PURPOSE. See the GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License along with OpenBLT.
| If not, see .
|
| A special exception to the GPL is included to allow you to distribute a combined work
| that includes OpenBLT without being obliged to provide the source code for any
| proprietary components. The exception text is included at the bottom of the license
| file .
|
****************************************************************************************/
/****************************************************************************************
* Include files
****************************************************************************************/
#include "boot.h" /* bootloader generic header */
#include "efm32_msc.h" /* MSC driver from EFM32 library */
/****************************************************************************************
* Macro definitions
****************************************************************************************/
#define FLASH_INVALID_SECTOR (0xff)
#define FLASH_INVALID_ADDRESS (0xffffffff)
#define FLASH_WRITE_BLOCK_SIZE (512)
#define FLASH_TOTAL_SECTORS (sizeof(flashLayout)/sizeof(flashLayout[0]))
#define FLASH_VECTOR_TABLE_CS_OFFSET (0x0B8)
/****************************************************************************************
* Type definitions
****************************************************************************************/
/* flash sector descriptor type */
typedef struct
{
blt_addr sector_start; /* sector start address */
blt_int32u sector_size; /* sector size in bytes */
blt_int8u sector_num; /* sector number */
} tFlashSector; /* flash sector description */
/* programming is done per block of max FLASH_WRITE_BLOCK_SIZE. for this a flash block
* manager is implemented in this driver. this flash block manager depends on this
* flash block info structure. It holds the base address of the flash block and the
* data that should be programmed into the flash block. The .base_addr must be a multiple
* of FLASH_WRITE_BLOCK_SIZE.
*/
typedef struct
{
blt_addr base_addr;
blt_int8u data[FLASH_WRITE_BLOCK_SIZE];
} tFlashBlockInfo;
/****************************************************************************************
* Function prototypes
****************************************************************************************/
static blt_bool FlashInitBlock(tFlashBlockInfo *block, blt_addr address);
static tFlashBlockInfo *FlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr);
static blt_bool FlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
blt_int8u *data, blt_int16u len);
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_addr FlashGetSectorBaseAddr(blt_int8u sector);
static blt_addr FlashGetSectorSize(blt_int8u sector);
static blt_int32u FlashCalcPageSize(void);
/****************************************************************************************
* Local constant declarations
****************************************************************************************/
/* The current flash layout does not reflect the minimum sector size of the physical
* flash (1 - 2kb), because this would make the table quit long and a waste of ROM. The
* minimum sector size is only really needed when erasing the flash. This can still be
* done in combination with macro FLASH_ERASE_BLOCK_SIZE.
*/
static const tFlashSector flashLayout[] =
{
/* { 0x00000000, 0x02000, 0}, flash sector 0 - reserved for bootloader */
{ 0x00002000, 0x02000, 1}, /* flash sector 1 - 8kb */
{ 0x00004000, 0x02000, 2}, /* flash sector 2 - 8kb */
{ 0x00006000, 0x02000, 3}, /* flash sector 3 - 8kb */
#if (BOOT_NVM_SIZE_KB > 32)
{ 0x00008000, 0x02000, 4}, /* flash sector 4 - 8kb */
{ 0x0000A000, 0x02000, 5}, /* flash sector 5 - 8kb */
{ 0x0000C000, 0x02000, 6}, /* flash sector 6 - 8kb */
{ 0x0000E000, 0x02000, 7}, /* flash sector 7 - 8kb */
#endif
#if (BOOT_NVM_SIZE_KB > 64)
{ 0x00010000, 0x02000, 8}, /* flash sector 8 - 8kb */
{ 0x00012000, 0x02000, 9}, /* flash sector 9 - 8kb */
{ 0x00014000, 0x02000, 10}, /* flash sector 10 - 8kb */
{ 0x00016000, 0x02000, 11}, /* flash sector 11 - 8kb */
{ 0x00018000, 0x02000, 12}, /* flash sector 12 - 8kb */
{ 0x0001A000, 0x02000, 13}, /* flash sector 13 - 8kb */
{ 0x0001C000, 0x02000, 14}, /* flash sector 14 - 8kb */
{ 0x0001E000, 0x02000, 15}, /* flash sector 15 - 8kb */
#endif
#if (BOOT_NVM_SIZE_KB > 128)
{ 0x00020000, 0x08000, 16}, /* flash sector 16 - 32kb */
{ 0x00028000, 0x08000, 17}, /* flash sector 17 - 32kb */
{ 0x00030000, 0x08000, 18}, /* flash sector 18 - 32kb */
{ 0x00038000, 0x08000, 19}, /* flash sector 19 - 32kb */
#endif
#if (BOOT_NVM_SIZE_KB > 256)
{ 0x00040000, 0x08000, 20}, /* flash sector 20 - 32kb */
{ 0x00048000, 0x08000, 21}, /* flash sector 21 - 32kb */
{ 0x00050000, 0x08000, 22}, /* flash sector 22 - 32kb */
{ 0x00058000, 0x08000, 23}, /* flash sector 23 - 32kb */
{ 0x00060000, 0x08000, 24}, /* flash sector 24 - 32kb */
{ 0x00068000, 0x08000, 25}, /* flash sector 25 - 32kb */
{ 0x00070000, 0x08000, 26}, /* flash sector 26 - 32kb */
{ 0x00078000, 0x08000, 27}, /* flash sector 27 - 32kb */
#endif
#if (BOOT_NVM_SIZE_KB > 512)
#error "BOOT_NVM_SIZE_KB > 512 is currently not supported."
#endif
};
/****************************************************************************************
* Local data declarations
****************************************************************************************/
/* The smallest amount of flash that can be programmed is FLASH_WRITE_BLOCK_SIZE. A flash
* block manager is implemented in this driver and stores info in this variable. Whenever
* new data should be flashed, it is first added to a RAM buffer, which is part of this
* variable. Whenever the RAM buffer, which has the size of a flash block, is full or
* data needs to be written to a different block, the contents of the RAM buffer are
* programmed to flash. The flash block manager requires some software overhead, yet
* results is faster flash programming because data is first harvested, ideally until
* there is enough to program an entire flash block, before the flash device is actually
* operated on.
*/
static tFlashBlockInfo blockInfo;
/* The first block of the user program holds the vector table, which on the STM32 is
* also the where the checksum is written to. Is it likely that the vector table is
* first flashed and then, at the end of the programming sequence, the checksum. This
* means that this flash block need to be written to twice. Normally this is not a
* problem with flash memory, as long as you write the same values to those bytes that
* are not supposed to be changed and the locations where you do write to are still in
* the erased 0xFF state. Unfortunately, writing twice to flash this way, does not work
* reliably on all micros. This is why we need to have an extra block, the bootblock,
* placed under the management of the block manager. This way is it possible to implement
* functionality so that the bootblock is only written to once at the end of the
* programming sequency.
*/
static tFlashBlockInfo bootBlockInfo;
/****************************************************************************************
** NAME: FlashInit
** PARAMETER: none
** RETURN VALUE: none
** DESCRIPTION: Initializes the flash driver.
**
****************************************************************************************/
void FlashInit(void)
{
/* enable the flash controller for writing */
MSC_Init();
/* init the flash block info structs by setting the address to an invalid address */
blockInfo.base_addr = FLASH_INVALID_ADDRESS;
bootBlockInfo.base_addr = FLASH_INVALID_ADDRESS;
} /*** end of FlashInit ***/
/****************************************************************************************
** NAME: FlashWrite
** PARAMETER: addr start address
** len length in bytes
** data pointer to the data buffer.
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
** DESCRIPTION: Writes the data to flash through a flash block manager. Note that this
** function also checks that no data is programmed outside the flash
** memory region, so the bootloader can never be overwritten.
**
****************************************************************************************/
blt_bool FlashWrite(blt_addr addr, blt_int32u len, blt_int8u *data)
{
blt_addr base_addr;
/* make sure the addresses are within the flash device */
if ( (FlashGetSector(addr) == FLASH_INVALID_SECTOR) || \
(FlashGetSector(addr+len-1) == FLASH_INVALID_SECTOR) )
{
return BLT_FALSE;
}
/* if this is the bootblock, then let the boot block manager handle it */
base_addr = (addr/FLASH_WRITE_BLOCK_SIZE)*FLASH_WRITE_BLOCK_SIZE;
if (base_addr == flashLayout[0].sector_start)
{
/* let the boot block manager handle it */
return FlashAddToBlock(&bootBlockInfo, addr, data, len);
}
/* let the block manager handle it */
return FlashAddToBlock(&blockInfo, addr, data, len);
} /*** end of FlashWrite ***/
/****************************************************************************************
** NAME: FlashErase
** PARAMETER: addr start address
** len length in bytes
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
** DESCRIPTION: Erases the flash memory. Note that this function also checks that no
** data is erased outside the flash memory region, so the bootloader can
** never be erased.
**
****************************************************************************************/
blt_bool FlashErase(blt_addr addr, blt_int32u len)
{
blt_int8u first_sector;
blt_int8u last_sector;
/* obtain the first and last sector number */
first_sector = FlashGetSector(addr);
last_sector = FlashGetSector(addr+len-1);
/* check them */
if ( (first_sector == FLASH_INVALID_SECTOR) || (last_sector == FLASH_INVALID_SECTOR) )
{
return BLT_FALSE;
}
/* erase the sectors */
return FlashEraseSectors(first_sector, last_sector);
} /*** end of FlashErase ***/
/****************************************************************************************
** NAME: FlashWriteChecksum
** PARAMETER: none
** RETURN VALUE: BLT_TRUE is successful, BTL_FALSE otherwise.
** DESCRIPTION: Writes a checksum of the user program to non-volatile memory. This is
** performed once the entire user program has been programmed. Through
** the checksum, the bootloader can check if the programming session
** was completed, which indicates that a valid user programming is
** present and can be started.
**
****************************************************************************************/
blt_bool FlashWriteChecksum(void)
{
blt_int32u signature_checksum = 0;
/* for the STM32 target we defined the checksum as the Two's complement value of the
* sum of the first 7 exception addresses.
*
* Layout of the vector table:
* 0x00000000 Initial stack pointer
* 0x00000004 Reset Handler
* 0x00000008 NMI Handler
* 0x0000000C Hard Fault Handler
* 0x00000010 MPU Fault Handler
* 0x00000014 Bus Fault Handler
* 0x00000018 Usage Fault Handler
*
* signature_checksum = Two's complement of (SUM(exception address values))
*
* the bootloader writes this 32-bit checksum value right after the vector table
* of the user program. note that this means one extra dummy entry must be added
* at the end of the user program's vector table to reserve storage space for the
* checksum.
*/
/* first check that the bootblock contains valid data. if not, this means the
* bootblock is not part of the reprogramming this time and therefore no
* new checksum needs to be written
*/
if (bootBlockInfo.base_addr == FLASH_INVALID_ADDRESS)
{
return BLT_TRUE;
}
/* compute the checksum. note that the user program's vectors are not yet written
* to flash but are present in the bootblock data structure at this point.
*/
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x00]));
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x04]));
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x08]));
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x0C]));
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x10]));
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x14]));
signature_checksum += *((blt_int32u*)(&bootBlockInfo.data[0+0x18]));
signature_checksum = ~signature_checksum; /* one's complement */
signature_checksum += 1; /* two's complement */
/* write the checksum */
return FlashWrite(flashLayout[0].sector_start+FLASH_VECTOR_TABLE_CS_OFFSET,
sizeof(blt_addr), (blt_int8u*)&signature_checksum);
} /*** end of FlashWriteChecksum ***/
/****************************************************************************************
** NAME: FlashVerifyChecksum
** PARAMETER: none
** RETURN VALUE: BLT_TRUE is successful, BTL_FALSE otherwise.
** DESCRIPTION: Verifies the checksum, which indicates that a valid user program is
** present and can be started.
**
****************************************************************************************/
blt_bool FlashVerifyChecksum(void)
{
blt_int32u signature_checksum = 0;
/* verify the checksum based on how it was written by CpuWriteChecksum() */
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start));
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x04));
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x08));
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x0C));
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x10));
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x14));
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+0x18));
signature_checksum += *((blt_int32u*)(flashLayout[0].sector_start+FLASH_VECTOR_TABLE_CS_OFFSET));
/* sum should add up to an unsigned 32-bit value of 0 */
if (signature_checksum == 0)
{
/* checksum okay */
return BLT_TRUE;
}
/* checksum incorrect */
return BLT_FALSE;
} /*** end of FlashVerifyChecksum ***/
/****************************************************************************************
** NAME: FlashDone
** PARAMETER: none
** RETURN VALUE: BLT_TRUE is succesful, BLT_FALSE otherwise.
** DESCRIPTION: Finilizes the flash driver operations. There could still be data in
** the currently active block that needs to be flashed.
**
****************************************************************************************/
blt_bool FlashDone(void)
{
/* check if there is still data waiting to be programmed in the boot block */
if (bootBlockInfo.base_addr != FLASH_INVALID_ADDRESS)
{
if (FlashWriteBlock(&bootBlockInfo) == BLT_FALSE)
{
return BLT_FALSE;
}
}
/* check if there is still data waiting to be programmed */
if (blockInfo.base_addr != FLASH_INVALID_ADDRESS)
{
if (FlashWriteBlock(&blockInfo) == BLT_FALSE)
{
return BLT_FALSE;
}
}
/* disable the flash controller for writing */
MSC_Deinit();
/* still here so all is okay */
return BLT_TRUE;
} /*** end of FlashDone ***/
/****************************************************************************************
** NAME: FlashInitBlock
** PARAMETER: block pointer to flash block info structure to operate on.
** address base address of the block data.
** RETURN VALUE: BLT_TRUE is succesful, BLT_FALSE otherwise.
** DESCRIPTION: Copies data currently in flash to the block->data and sets the
** base address.
**
****************************************************************************************/
static blt_bool FlashInitBlock(tFlashBlockInfo *block, blt_addr address)
{
/* check address alignment */
if ((address % FLASH_WRITE_BLOCK_SIZE) != 0)
{
return BLT_FALSE;
}
/* make sure that we are initializing a new block and not the same one */
if (block->base_addr == address)
{
/* block already initialized, so nothing to do */
return BLT_TRUE;
}
/* set the base address and copies the current data from flash */
block->base_addr = address;
CpuMemCopy((blt_addr)block->data, address, FLASH_WRITE_BLOCK_SIZE);
return BLT_TRUE;
} /*** end of FlashInitBlock ***/
/****************************************************************************************
** NAME: FlashSwitchBlock
** PARAMETER: block pointer to flash block info structure to operate on.
** base_addr base address for the next block
** RETURN VALUE: the pointer of the block info struct that is no being used, or a NULL
** pointer in case of error.
** DESCRIPTION: Switches blocks by programming the current one and initializing the
** next.
**
****************************************************************************************/
static tFlashBlockInfo *FlashSwitchBlock(tFlashBlockInfo *block, blt_addr base_addr)
{
/* check if a switch needs to be made away from the boot block. in this case the boot
* block shouldn't be written yet, because this is done at the end of the programming
* session by FlashDone(), this is right after the checksum was written.
*/
if (block == &bootBlockInfo)
{
/* switch from the boot block to the generic block info structure */
block = &blockInfo;
}
/* check if a switch back into the bootblock is needed. in this case the generic block
* doesn't need to be written here yet.
*/
else if (base_addr == flashLayout[0].sector_start)
{
/* switch from the generic block to the boot block info structure */
block = &bootBlockInfo;
base_addr = flashLayout[0].sector_start;
}
else
{
/* need to switch to a new block, so program the current one and init the next */
if (FlashWriteBlock(block) == BLT_FALSE)
{
return BLT_NULL;
}
}
/* initialize tne new block when necessary */
if (FlashInitBlock(block, base_addr) == BLT_FALSE)
{
return BLT_NULL;
}
/* still here to all is okay */
return block;
} /*** end of FlashSwitchBlock ***/
/****************************************************************************************
** NAME: FlashAddToBlock
** PARAMETER: block pointer to flash block info structure to operate on.
** address flash destination address
** data pointer to the byte array with data
** len number of bytes to add to the block
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
** DESCRIPTION: Programming is done per block. This function adds data to the block
** that is currently collecting data to be written to flash. If the
** address is outside of the current block, the current block is written
** to flash an a new block is initialized.
**
****************************************************************************************/
static blt_bool FlashAddToBlock(tFlashBlockInfo *block, blt_addr address,
blt_int8u *data, blt_int16u len)
{
blt_addr current_base_addr;
blt_int8u *dst;
blt_int8u *src;
/* determine the current base address */
current_base_addr = (address/FLASH_WRITE_BLOCK_SIZE)*FLASH_WRITE_BLOCK_SIZE;
/* make sure the blockInfo is not uninitialized */
if (block->base_addr == FLASH_INVALID_ADDRESS)
{
/* initialize the blockInfo struct for the current block */
if (FlashInitBlock(block, current_base_addr) == BLT_FALSE)
{
return BLT_FALSE;
}
}
/* check if the new data fits in the current block */
if (block->base_addr != current_base_addr)
{
/* need to switch to a new block, so program the current one and init the next */
block = FlashSwitchBlock(block, current_base_addr);
if (block == BLT_NULL)
{
return BLT_FALSE;
}
}
/* add the data to the current block, but check for block overflow */
dst = &(block->data[address - block->base_addr]);
src = data;
do
{
/* keep the watchdog happy */
CopService();
/* buffer overflow? */
if ((blt_addr)(dst-&(block->data[0])) >= FLASH_WRITE_BLOCK_SIZE)
{
/* need to switch to a new block, so program the current one and init the next */
block = FlashSwitchBlock(block, current_base_addr+FLASH_WRITE_BLOCK_SIZE);
if (block == BLT_NULL)
{
return BLT_FALSE;
}
/* reset destination pointer */
dst = &(block->data[0]);
}
/* write the data to the buffer */
*dst = *src;
/* update pointers */
dst++;
src++;
/* decrement byte counter */
len--;
}
while (len > 0);
/* still here so all is good */
return BLT_TRUE;
} /*** end of FlashAddToBlock ***/
/****************************************************************************************
** NAME: FlashWriteBlock
** PARAMETER: block pointer to flash block info structure to operate on.
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
** DESCRIPTION: Programs FLASH_WRITE_BLOCK_SIZE bytes to flash from the block->data
** array.
**
****************************************************************************************/
static blt_bool FlashWriteBlock(tFlashBlockInfo *block)
{
blt_int8u sector_num;
blt_bool result = BLT_TRUE;
blt_addr prog_addr;
blt_int32u prog_data;
blt_int32u word_cnt;
/* check that address is actually within flash */
sector_num = FlashGetSector(block->base_addr);
if (sector_num == FLASH_INVALID_SECTOR)
{
return BLT_FALSE;
}
/* program all words in the block one by one */
for (word_cnt=0; word_cnt<(FLASH_WRITE_BLOCK_SIZE/sizeof(blt_int32u)); word_cnt++)
{
prog_addr = block->base_addr + (word_cnt * sizeof(blt_int32u));
prog_data = *(volatile blt_int32u*)(&block->data[word_cnt * sizeof(blt_int32u)]);
/* keep the watchdog happy */
CopService();
/* program a word */
if (MSC_WriteWord((uint32_t *)prog_addr, &prog_data, sizeof(blt_int32u)) != mscReturnOk)
{
result = BLT_FALSE;
break;
}
/* verify that the written data is actually there */
if (*(volatile blt_int32u*)prog_addr != prog_data)
{
result = BLT_FALSE;
break;
}
}
/* still here so all is okay */
return result;
} /*** end of FlashWriteBlock ***/
/****************************************************************************************
** NAME: FlashCalcPageSize
** PARAMETER: none
** RETURN VALUE: The flash page size
** DESCRIPTION: Determines the flash page size for the specific EFM32 derivative. This
** is the minimum erase size.
**
****************************************************************************************/
static blt_int32u FlashCalcPageSize(void)
{
blt_int8u family = *(blt_int8u*)0x0FE081FE;
if ( ( family == 71 ) || ( family == 73 ) )
{
/* Gecko and Tiny, 'G' or 'I' */
return 512;
}
else if ( family == 72 )
{
/* Giant, 'H' */
return 4096;
}
else
{
/* Leopard, 'J' */
return 2048;
}
} /*** end of FlashCalcPageSize ***/
/****************************************************************************************
** NAME: FlashEraseSectors
** PARAMETER: first_sector first flash sector number
** last_sector last flash sector number
** RETURN VALUE: BLT_TRUE if successful, BLT_FALSE otherwise.
** DESCRIPTION: Erases the flash sectors from first_sector up until last_sector
**
****************************************************************************************/
static blt_bool FlashEraseSectors(blt_int8u first_sector, blt_int8u last_sector)
{
blt_int16u nr_of_blocks;
blt_int16u block_cnt;
blt_addr start_addr;
blt_addr end_addr;
blt_int32u erase_block_size;
/* validate the sector numbers */
if (first_sector > last_sector)
{
return BLT_FALSE;
}
if ( (first_sector < flashLayout[0].sector_num) || \
(last_sector > flashLayout[FLASH_TOTAL_SECTORS-1].sector_num) )
{
return BLT_FALSE;
}
/* determine the minimum erase size */
erase_block_size = FlashCalcPageSize();
/* determine how many blocks need to be erased */
start_addr = FlashGetSectorBaseAddr(first_sector);
end_addr = FlashGetSectorBaseAddr(last_sector) + FlashGetSectorSize(last_sector) - 1;
nr_of_blocks = (end_addr - start_addr + 1) / erase_block_size;
/* erase all blocks one by one */
for (block_cnt=0; block_cnt= flashLayout[sectorIdx].sector_start) && \
(address < (flashLayout[sectorIdx].sector_start + \
flashLayout[sectorIdx].sector_size)) )
{
/* return the sector number */
return flashLayout[sectorIdx].sector_num;
}
}
/* still here so no valid sector found */
return FLASH_INVALID_SECTOR;
} /*** end of FlashGetSector ***/
/****************************************************************************************
** NAME: FlashGetSectorBaseAddr
** PARAMETER: sector sector to get the base address of.
** RETURN VALUE: flash sector base address or FLASH_INVALID_ADDRESS
** DESCRIPTION: Determines the flash sector base address.
**
****************************************************************************************/
static blt_addr FlashGetSectorBaseAddr(blt_int8u sector)
{
blt_int8u sectorIdx;
/* search through the sectors to find the right one */
for (sectorIdx = 0; sectorIdx < FLASH_TOTAL_SECTORS; sectorIdx++)
{
/* keep the watchdog happy */
CopService();
if (flashLayout[sectorIdx].sector_num == sector)
{
return flashLayout[sectorIdx].sector_start;
}
}
/* still here so no valid sector found */
return FLASH_INVALID_ADDRESS;
} /*** end of FlashGetSectorBaseAddr ***/
/****************************************************************************************
** NAME: FlashGetSectorSize
** PARAMETER: sector sector to get the size of.
** RETURN VALUE: flash sector size or 0
** DESCRIPTION: Determines the flash sector size.
**
****************************************************************************************/
static blt_addr FlashGetSectorSize(blt_int8u sector)
{
blt_int8u sectorIdx;
/* search through the sectors to find the right one */
for (sectorIdx = 0; sectorIdx < FLASH_TOTAL_SECTORS; sectorIdx++)
{
/* keep the watchdog happy */
CopService();
if (flashLayout[sectorIdx].sector_num == sector)
{
return flashLayout[sectorIdx].sector_size;
}
}
/* still here so no valid sector found */
return 0;
} /*** end of FlashGetSectorSize ***/
/*********************************** end of flash.c ************************************/