amiro-blt / Target / Source / file.c @ 1446566f
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/************************************************************************************//** |
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* \file Source\file.c
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* \brief Bootloader file system interface source file.
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* \ingroup Core
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* \internal
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*----------------------------------------------------------------------------------------
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* C O P Y R I G H T
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*----------------------------------------------------------------------------------------
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* Copyright (c) 2013 by Feaser http://www.feaser.com All rights reserved
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*
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*----------------------------------------------------------------------------------------
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* L I C E N S E
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*----------------------------------------------------------------------------------------
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* This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with OpenBLT.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* A special exception to the GPL is included to allow you to distribute a combined work
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* that includes OpenBLT without being obliged to provide the source code for any
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* proprietary components. The exception text is included at the bottom of the license
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* file <license.html>.
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*
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* \endinternal
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****************************************************************************************/
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/****************************************************************************************
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* Include files
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****************************************************************************************/
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#include "boot.h" /* bootloader generic header */ |
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#include <string.h> /* for strcpy etc. */ |
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#include <ctype.h> /* for toupper() etc. */ |
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#if (BOOT_FILE_SYS_ENABLE > 0) |
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/****************************************************************************************
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* Type definitions
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****************************************************************************************/
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/** \brief Enumeration for the different internal module states. */
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typedef enum |
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{
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FIRMWARE_UPDATE_STATE_IDLE, /**< idle state */
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FIRMWARE_UPDATE_STATE_STARTING, /**< starting state */
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FIRMWARE_UPDATE_STATE_ERASING, /**< erasing state */
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FIRMWARE_UPDATE_STATE_PROGRAMMING /**< programming state */
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} tFirmwareUpdateState; |
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/** \brief Structure type with information for the memory erase opeartion. */
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typedef struct |
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{
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blt_addr start_address; /**< erase start address */
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blt_int32u total_size; /**< total number of bytes to erase */
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} tFileEraseInfo; |
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/** \brief Structure type for grouping FATFS related objects used by this module. */
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typedef struct |
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{
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FATFS fs; /**< file system object for mouting */
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FIL file; /**< file object for firmware file */
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} tFatFsObjects; |
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/****************************************************************************************
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* Function prototypes
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****************************************************************************************/
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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static blt_char FileLibByteNibbleToChar(blt_int8u nibble);
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static blt_char *FileLibByteToHexString(blt_int8u byte_val, blt_char *destination);
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static blt_char *FileLibLongToIntString(blt_int32u long_val, blt_char *destination);
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#endif
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static blt_int8u FileLibHexStringToByte(const blt_char *hexstring); |
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/****************************************************************************************
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* Hook functions
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****************************************************************************************/
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extern blt_bool FileIsFirmwareUpdateRequestedHook(void); |
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extern const blt_char *FileGetFirmwareFilenameHook(void); |
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extern void FileFirmwareUpdateStartedHook(void); |
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extern void FileFirmwareUpdateCompletedHook(void); |
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extern void FileFirmwareUpdateErrorHook(blt_int8u error_code); |
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extern void FileFirmwareUpdateLogHook(blt_char *info_string); |
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/****************************************************************************************
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* Local data declarations
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****************************************************************************************/
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/** \brief Local variable that holds the internal module state. */
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static tFirmwareUpdateState firmwareUpdateState;
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/** \brief Local variable for the used FATFS objects in this module. */
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static tFatFsObjects fatFsObjects;
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/** \brief Local variable for storing S-record line parsing results. */
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static tSrecLineParseObject lineParseObject;
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/** \brief Local variable for storing information regarding the memory erase operation.*/
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static tFileEraseInfo eraseInfo;
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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/** \brief Local character buffer for storing the string with log information. */
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static blt_char loggingStr[64]; |
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#endif
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/***********************************************************************************//** |
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** \brief Initializes the file system interface module. The initial firmware
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** update state is set to idle and the file system is mounted as
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** logical disk 0.
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** \return none
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**
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****************************************************************************************/
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void FileInit(void) |
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{
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FRESULT fresult; |
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/* set the initial state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
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/* mount the file system, using logical disk 0 */
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fresult = f_mount(0, &fatFsObjects.fs);
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/* mounting does not access the disk and should succeed unless misconfigured */
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ASSERT_RT(fresult == FR_OK); |
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} /*** end of FileInit ***/
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/***********************************************************************************//** |
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** \brief This function checks if a firmware update through the locally attached
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** storage is in progress or not (idle).
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** \return BLT_TRUE when in idle state, BLT_FALSE otherwise.
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**
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****************************************************************************************/
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blt_bool FileIsIdle(void)
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{
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if (firmwareUpdateState == FIRMWARE_UPDATE_STATE_IDLE)
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{
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return BLT_TRUE;
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} |
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return BLT_FALSE;
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} /*** end of FileIsIdle ***/
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/***********************************************************************************//** |
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** \brief This function checks if a firmware update through the locally attached
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** storage is requested to be started and if so processes this request
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** by transitioning from the IDLE to the STARTING state.
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** \return BLT_TRUE when a firmware update is requested, BLT_FALSE otherwise.
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**
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****************************************************************************************/
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blt_bool FileHandleFirmwareUpdateRequest(void)
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{
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#if (BOOT_COM_ENABLE > 0) |
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/* make sure that there is no connection with a remote host to prevent two firmware
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* updates happening at the same time
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*/
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if (ComIsConnected() == BLT_TRUE)
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{
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return BLT_FALSE;
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} |
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#endif
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/* a new firmware update request can only be handled if not already busy with one */
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if (firmwareUpdateState != FIRMWARE_UPDATE_STATE_IDLE)
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{
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return BLT_FALSE;
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} |
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/* check if a firmware update is requested */
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if (FileIsFirmwareUpdateRequestedHook() == BLT_TRUE)
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{
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/* transition from IDLE to STARTING state, which kicks off the update sequence */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_STARTING; |
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return BLT_TRUE;
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} |
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/* still here so no update request pending */
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return BLT_FALSE;
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} /*** end of FileHandleFirmwareUpdateRequest ***/
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/***********************************************************************************//** |
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** \brief File system task function for managing the firmware updates from
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** locally attached storage.
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** \return none.
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**
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****************************************************************************************/
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void FileTask(void) |
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{
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blt_int16s parse_result; |
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blt_char *read_line_ptr; |
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/* ------------------------------- idle -------------------------------------------- */
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if (firmwareUpdateState == FIRMWARE_UPDATE_STATE_IDLE)
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{
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/* currently, nothings need to be done while idling */
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} |
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/* ------------------------------- starting ---------------------------------------- */
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else if (firmwareUpdateState == FIRMWARE_UPDATE_STATE_STARTING) |
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{
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#if (BOOT_FILE_STARTED_HOOK_ENABLE > 0) |
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/* inform application about update started event via hook function */
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FileFirmwareUpdateStartedHook(); |
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#endif
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("Firmware update request detected\n\r");
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FileFirmwareUpdateLogHook("Opening firmware file for reading...");
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#endif
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/* attempt to obtain a file object for the firmware file */
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if (f_open(&fatFsObjects.file, FileGetFirmwareFilenameHook(), FA_OPEN_EXISTING | FA_READ) != FR_OK)
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{
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/* can't open file */
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("ERROR\n\r");
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#endif
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#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
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FileFirmwareUpdateErrorHook(FILE_ERROR_CANNOT_OPEN_FIRMWARE_FILE); |
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#endif
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/* nothing left to do now */
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return;
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} |
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("OK\n\r");
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FileFirmwareUpdateLogHook("Starting the programming sequence\n\r");
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FileFirmwareUpdateLogHook("Parsing firmware file to obtain erase size...");
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#endif
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/* prepare data objects for the erasing state */
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eraseInfo.start_address = 0;
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eraseInfo.total_size = 0;
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/* transition from idle to erasing state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_ERASING; |
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} |
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/* ------------------------------- erasing ----------------------------------------- */
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else if (firmwareUpdateState == FIRMWARE_UPDATE_STATE_ERASING) |
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{
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/* read a line from the file */
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read_line_ptr = f_gets(lineParseObject.line, sizeof(lineParseObject.line), &fatFsObjects.file);
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/* check if an error occurred */
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if (f_error(&fatFsObjects.file) > 0) |
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("ERROR\n\r");
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#endif
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#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
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FileFirmwareUpdateErrorHook(FILE_ERROR_CANNOT_READ_FROM_FILE); |
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#endif
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/* close the file */
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f_close(&fatFsObjects.file); |
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/* cannot continue with firmware update so go back to idle state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
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return;
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} |
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/* parse the S-Record line without copying the data values if the line is not empty */
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if (read_line_ptr != BLT_NULL)
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{
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parse_result = FileSrecParseLine(lineParseObject.line, &lineParseObject.address, BLT_NULL); |
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/* check parsing result */
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if (parse_result == ERROR_SREC_INVALID_CHECKSUM)
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("ERROR\n\r");
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#endif
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#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
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FileFirmwareUpdateErrorHook(FILE_ERROR_INVALID_CHECKSUM_IN_FILE); |
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#endif
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/* close the file */
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f_close(&fatFsObjects.file); |
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/* cannot continue with firmware update so go back to idle state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
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return;
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} |
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} |
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/* only process parsing results if the line contained address/data info */
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if (parse_result > 0) |
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{
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/* is this the first address/data info we encountered? */
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if (eraseInfo.total_size == 0) |
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{
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/* store the start_address and byte count */
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eraseInfo.start_address = lineParseObject.address; |
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eraseInfo.total_size = parse_result; |
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} |
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else
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{
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/* update the start_address and byte count */
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if (lineParseObject.address < eraseInfo.start_address)
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{
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eraseInfo.start_address = lineParseObject.address; |
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} |
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eraseInfo.total_size += parse_result; |
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} |
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} |
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/* check if the end of the file was reached */
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if (f_eof(&fatFsObjects.file) > 0) |
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{
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/* rewind the file in preparation for the programming state */
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if (f_lseek(&fatFsObjects.file, 0) != FR_OK) |
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("ERROR\n\r");
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#endif
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#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
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FileFirmwareUpdateErrorHook(FILE_ERROR_REWINDING_FILE_READ_POINTER); |
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#endif
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/* close the file */
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f_close(&fatFsObjects.file); |
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/* cannot continue with firmware update so go back to idle state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
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return;
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} |
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("OK\n\r");
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FileFirmwareUpdateLogHook("Erasing ");
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/* convert size to string */
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FileLibLongToIntString(eraseInfo.total_size, loggingStr); |
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FileFirmwareUpdateLogHook(loggingStr); |
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FileFirmwareUpdateLogHook(" bytes from memory at 0x");
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/* convert address to hex-string */
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FileLibByteToHexString((blt_int8u)(eraseInfo.start_address >> 24), &loggingStr[0]); |
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FileLibByteToHexString((blt_int8u)(eraseInfo.start_address >> 16), &loggingStr[2]); |
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FileLibByteToHexString((blt_int8u)(eraseInfo.start_address >> 8), &loggingStr[4]); |
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FileLibByteToHexString((blt_int8u)eraseInfo.start_address, &loggingStr[6]);
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FileFirmwareUpdateLogHook(loggingStr); |
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FileFirmwareUpdateLogHook("...");
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#endif
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/* still here so we are ready to perform the memory erase operation */
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if (NvmErase(eraseInfo.start_address, eraseInfo.total_size) == BLT_FALSE)
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("ERROR\n\r");
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#endif
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#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
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FileFirmwareUpdateErrorHook(FILE_ERROR_CANNOT_ERASE_MEMORY); |
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#endif
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/* close the file */
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f_close(&fatFsObjects.file); |
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/* cannot continue with firmware update so go back to idle state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
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return;
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} |
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("OK\n\r");
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#endif
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/* all okay, then go to programming state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_PROGRAMMING; |
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} |
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} |
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/* ------------------------------- programming ------------------------------------- */
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else if (firmwareUpdateState == FIRMWARE_UPDATE_STATE_PROGRAMMING) |
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{
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/* read a line from the file */
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read_line_ptr = f_gets(lineParseObject.line, sizeof(lineParseObject.line), &fatFsObjects.file);
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/* check if an error occurred */
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if (f_error(&fatFsObjects.file) > 0) |
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("Reading line from file...ERROR\n\r");
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#endif
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#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
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FileFirmwareUpdateErrorHook(FILE_ERROR_CANNOT_READ_FROM_FILE); |
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#endif
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/* close the file */
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f_close(&fatFsObjects.file); |
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/* cannot continue with firmware update so go back to idle state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
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return;
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} |
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/* parse the S-Record line if the line is not empty */
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if (read_line_ptr != BLT_NULL)
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{
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parse_result = FileSrecParseLine(lineParseObject.line, &lineParseObject.address, lineParseObject.data); |
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/* check parsing result */
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if (parse_result == ERROR_SREC_INVALID_CHECKSUM)
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("Invalid checksum found...ERROR\n\r");
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#endif
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#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
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FileFirmwareUpdateErrorHook(FILE_ERROR_INVALID_CHECKSUM_IN_FILE); |
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#endif
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/* close the file */
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f_close(&fatFsObjects.file); |
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/* cannot continue with firmware update so go back to idle state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
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return;
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} |
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} |
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/* only process parsing results if the line contained address/data info */
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if (parse_result > 0) |
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("Programming ");
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/* convert size to string */
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FileLibLongToIntString(parse_result, loggingStr); |
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FileFirmwareUpdateLogHook(loggingStr); |
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FileFirmwareUpdateLogHook(" bytes to memory at 0x");
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/* convert address to hex-string */
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FileLibByteToHexString((blt_int8u)(lineParseObject.address >> 24), &loggingStr[0]); |
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FileLibByteToHexString((blt_int8u)(lineParseObject.address >> 16), &loggingStr[2]); |
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FileLibByteToHexString((blt_int8u)(lineParseObject.address >> 8), &loggingStr[4]); |
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FileLibByteToHexString((blt_int8u)lineParseObject.address, &loggingStr[6]);
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FileFirmwareUpdateLogHook(loggingStr); |
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FileFirmwareUpdateLogHook("...");
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#endif
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/* program the data */
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if (NvmWrite(lineParseObject.address, parse_result, lineParseObject.data) == BLT_FALSE)
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("ERROR\n\r");
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#endif
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#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
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FileFirmwareUpdateErrorHook(FILE_ERROR_CANNOT_PROGRAM_MEMORY); |
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#endif
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/* close the file */
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f_close(&fatFsObjects.file); |
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/* cannot continue with firmware update so go back to idle state */
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firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
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return;
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} |
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("OK\n\r");
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#endif
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} |
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/* check if the end of the file was reached */
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if (f_eof(&fatFsObjects.file) > 0) |
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("Writing program checksum...");
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#endif
|
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/* finish the programming by writing the checksum */
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if (NvmDone() == BLT_FALSE)
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{
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#if (BOOT_FILE_LOGGING_ENABLE > 0) |
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FileFirmwareUpdateLogHook("ERROR\n\r");
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#endif
|
| 433 |
#if (BOOT_FILE_ERROR_HOOK_ENABLE > 0) |
| 434 |
FileFirmwareUpdateErrorHook(FILE_ERROR_CANNOT_WRITE_CHECKSUM); |
| 435 |
#endif
|
| 436 |
/* close the file */
|
| 437 |
f_close(&fatFsObjects.file); |
| 438 |
/* cannot continue with firmware update so go back to idle state */
|
| 439 |
firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
| 440 |
return;
|
| 441 |
} |
| 442 |
#if (BOOT_FILE_LOGGING_ENABLE > 0) |
| 443 |
FileFirmwareUpdateLogHook("OK\n\r");
|
| 444 |
FileFirmwareUpdateLogHook("Closing firmware file\n\r");
|
| 445 |
#endif
|
| 446 |
/* close the file */
|
| 447 |
f_close(&fatFsObjects.file); |
| 448 |
#if (BOOT_FILE_LOGGING_ENABLE > 0) |
| 449 |
FileFirmwareUpdateLogHook("Firmware update successfully completed\n\r");
|
| 450 |
#endif
|
| 451 |
/* all done so transistion back to idle mode */
|
| 452 |
firmwareUpdateState = FIRMWARE_UPDATE_STATE_IDLE; |
| 453 |
#if (BOOT_FILE_COMPLETED_HOOK_ENABLE > 0) |
| 454 |
/* inform application about update completed event via hook function */
|
| 455 |
FileFirmwareUpdateCompletedHook(); |
| 456 |
#endif
|
| 457 |
/* attempt to start the user program now that programming is done. note that
|
| 458 |
* a call to CpuReset() won't work correctly here, because if the same firmware
|
| 459 |
* file is still on the locally attached storage, it will just restart the
|
| 460 |
* firmware update again and again..
|
| 461 |
*/
|
| 462 |
CpuStartUserProgram(); |
| 463 |
} |
| 464 |
} |
| 465 |
} /*** end of FileTask ***/
|
| 466 |
|
| 467 |
|
| 468 |
/************************************************************************************//** |
| 469 |
** \brief Inspects a line from a Motorola S-Record file to determine its type.
|
| 470 |
** \param line A line from the S-Record.
|
| 471 |
** \return the S-Record line type.
|
| 472 |
**
|
| 473 |
****************************************************************************************/
|
| 474 |
tSrecLineType FileSrecGetLineType(const blt_char *line)
|
| 475 |
{
|
| 476 |
/* check if the line starts with the 'S' character, followed by a digit */
|
| 477 |
if ( (toupper(line[0]) != 'S') || (isdigit(line[1]) == 0) ) |
| 478 |
{
|
| 479 |
/* not a valid S-Record line type */
|
| 480 |
return LINE_TYPE_UNSUPPORTED;
|
| 481 |
} |
| 482 |
/* determine the line type */
|
| 483 |
if (line[1] == '1') |
| 484 |
{
|
| 485 |
return LINE_TYPE_S1;
|
| 486 |
} |
| 487 |
if (line[1] == '2') |
| 488 |
{
|
| 489 |
return LINE_TYPE_S2;
|
| 490 |
} |
| 491 |
if (line[1] == '3') |
| 492 |
{
|
| 493 |
return LINE_TYPE_S3;
|
| 494 |
} |
| 495 |
/* still here so not a supported line type found */
|
| 496 |
return LINE_TYPE_UNSUPPORTED;
|
| 497 |
} /*** end of FileSrecGetLineType ***/
|
| 498 |
|
| 499 |
|
| 500 |
/************************************************************************************//** |
| 501 |
** \brief Inspects an S1, S2 or S3 line from a Motorola S-Record file to
|
| 502 |
** determine if the checksum at the end is corrrect.
|
| 503 |
** \param line An S1, S2 or S3 line from the S-Record.
|
| 504 |
** \return BLT_TRUE if the checksum is correct, BLT_FALSE otherwise.
|
| 505 |
**
|
| 506 |
****************************************************************************************/
|
| 507 |
blt_bool FileSrecVerifyChecksum(const blt_char *line)
|
| 508 |
{
|
| 509 |
blt_int16u bytes_on_line; |
| 510 |
blt_int8u checksum = 0;
|
| 511 |
|
| 512 |
/* adjust pointer to point to byte count value */
|
| 513 |
line += 2;
|
| 514 |
/* read out the number of byte values that follow on the line */
|
| 515 |
bytes_on_line = FileLibHexStringToByte(line); |
| 516 |
/* byte count is part of checksum */
|
| 517 |
checksum += bytes_on_line; |
| 518 |
/* adjust pointer to the first byte of the address */
|
| 519 |
line += 2;
|
| 520 |
/* add byte values of address and data, but not the final checksum */
|
| 521 |
do
|
| 522 |
{
|
| 523 |
/* add the next byte value to the checksum */
|
| 524 |
checksum += FileLibHexStringToByte(line); |
| 525 |
/* update counter */
|
| 526 |
bytes_on_line--; |
| 527 |
/* point to next hex string in the line */
|
| 528 |
line += 2;
|
| 529 |
} |
| 530 |
while (bytes_on_line > 1); |
| 531 |
/* the checksum is calculated by summing up the values of the byte count, address and
|
| 532 |
* databytes and then taking the 1-complement of the sum's least signigicant byte */
|
| 533 |
checksum = ~checksum; |
| 534 |
/* finally verify the calculated checksum with the one at the end of the line */
|
| 535 |
if (checksum != FileLibHexStringToByte(line))
|
| 536 |
{
|
| 537 |
/* checksum incorrect */
|
| 538 |
return BLT_FALSE;
|
| 539 |
} |
| 540 |
/* still here so the checksum was correct */
|
| 541 |
return BLT_TRUE;
|
| 542 |
} /*** end of FileSrecVerifyChecksum ***/
|
| 543 |
|
| 544 |
|
| 545 |
/************************************************************************************//** |
| 546 |
** \brief Parses a line from a Motorola S-Record file and looks for S1, S2 or S3
|
| 547 |
** lines with data. Note that if a null pointer is passed as the data
|
| 548 |
** parameter, then no data is extracted from the line.
|
| 549 |
** \param line A line from the S-Record.
|
| 550 |
** \param address Address found in the S-Record data line.
|
| 551 |
** \param data Byte array where the data bytes from the S-Record data line
|
| 552 |
** are stored.
|
| 553 |
** \return The number of data bytes found on the S-record data line, 0 in case
|
| 554 |
** the line is not an S1, S2 or S3 line or ERROR_SREC_INVALID_CHECKSUM
|
| 555 |
** in case the checksum validation failed.
|
| 556 |
**
|
| 557 |
****************************************************************************************/
|
| 558 |
blt_int16s FileSrecParseLine(const blt_char *line, blt_addr *address, blt_int8u *data)
|
| 559 |
{
|
| 560 |
tSrecLineType lineType; |
| 561 |
blt_int16s data_byte_count = 0;
|
| 562 |
blt_int16u bytes_on_line; |
| 563 |
blt_int16u i; |
| 564 |
|
| 565 |
/* check pointers and not that data can be a null pointer */
|
| 566 |
ASSERT_RT((address != BLT_NULL) && (line != BLT_NULL)); |
| 567 |
/* figure out what type of line we are dealing with */
|
| 568 |
lineType = FileSrecGetLineType(line); |
| 569 |
/* make sure it is one that we can parse */
|
| 570 |
if (lineType == LINE_TYPE_UNSUPPORTED)
|
| 571 |
{
|
| 572 |
/* not a parsing error, but simply no data on this line */
|
| 573 |
return 0; |
| 574 |
} |
| 575 |
/* verify the checksum */
|
| 576 |
if (FileSrecVerifyChecksum(line) == BLT_FALSE)
|
| 577 |
{
|
| 578 |
/* error on data line encountered */
|
| 579 |
return ERROR_SREC_INVALID_CHECKSUM;
|
| 580 |
} |
| 581 |
/* all good so far, now read out the address and databytes for the line */
|
| 582 |
switch (lineType)
|
| 583 |
{
|
| 584 |
/* ---------------------------- S1 line type ------------------------------------- */
|
| 585 |
case LINE_TYPE_S1:
|
| 586 |
/* adjust pointer to point to byte count value */
|
| 587 |
line += 2;
|
| 588 |
/* read out the number of byte values that follow on the line */
|
| 589 |
bytes_on_line = FileLibHexStringToByte(line); |
| 590 |
/* read out the 16-bit address */
|
| 591 |
line += 2;
|
| 592 |
*address = FileLibHexStringToByte(line) << 8;
|
| 593 |
line += 2;
|
| 594 |
*address += FileLibHexStringToByte(line); |
| 595 |
/* adjust pointer to point to the first data byte after the address */
|
| 596 |
line += 2;
|
| 597 |
/* determine how many data bytes are on the line */
|
| 598 |
data_byte_count = bytes_on_line - 3; /* -2 bytes address, -1 byte checksum */ |
| 599 |
/* read and store data bytes if requested */
|
| 600 |
if (data != BLT_NULL)
|
| 601 |
{
|
| 602 |
for (i=0; i<data_byte_count; i++) |
| 603 |
{
|
| 604 |
data[i] = FileLibHexStringToByte(line); |
| 605 |
line += 2;
|
| 606 |
} |
| 607 |
} |
| 608 |
break;
|
| 609 |
|
| 610 |
/* ---------------------------- S2 line type ------------------------------------- */
|
| 611 |
case LINE_TYPE_S2:
|
| 612 |
/* adjust pointer to point to byte count value */
|
| 613 |
line += 2;
|
| 614 |
/* read out the number of byte values that follow on the line */
|
| 615 |
bytes_on_line = FileLibHexStringToByte(line); |
| 616 |
/* read out the 32-bit address */
|
| 617 |
line += 2;
|
| 618 |
*address = FileLibHexStringToByte(line) << 16;
|
| 619 |
line += 2;
|
| 620 |
*address += FileLibHexStringToByte(line) << 8;
|
| 621 |
line += 2;
|
| 622 |
*address += FileLibHexStringToByte(line); |
| 623 |
/* adjust pointer to point to the first data byte after the address */
|
| 624 |
line += 2;
|
| 625 |
/* determine how many data bytes are on the line */
|
| 626 |
data_byte_count = bytes_on_line - 4; /* -3 bytes address, -1 byte checksum */ |
| 627 |
/* read and store data bytes if requested */
|
| 628 |
if (data != BLT_NULL)
|
| 629 |
{
|
| 630 |
for (i=0; i<data_byte_count; i++) |
| 631 |
{
|
| 632 |
data[i] = FileLibHexStringToByte(line); |
| 633 |
line += 2;
|
| 634 |
} |
| 635 |
} |
| 636 |
break;
|
| 637 |
|
| 638 |
/* ---------------------------- S3 line type ------------------------------------- */
|
| 639 |
case LINE_TYPE_S3:
|
| 640 |
/* adjust pointer to point to byte count value */
|
| 641 |
line += 2;
|
| 642 |
/* read out the number of byte values that follow on the line */
|
| 643 |
bytes_on_line = FileLibHexStringToByte(line); |
| 644 |
/* read out the 32-bit address */
|
| 645 |
line += 2;
|
| 646 |
*address = FileLibHexStringToByte(line) << 24;
|
| 647 |
line += 2;
|
| 648 |
*address += FileLibHexStringToByte(line) << 16;
|
| 649 |
line += 2;
|
| 650 |
*address += FileLibHexStringToByte(line) << 8;
|
| 651 |
line += 2;
|
| 652 |
*address += FileLibHexStringToByte(line); |
| 653 |
/* adjust pointer to point to the first data byte after the address */
|
| 654 |
line += 2;
|
| 655 |
/* determine how many data bytes are on the line */
|
| 656 |
data_byte_count = bytes_on_line - 5; /* -4 bytes address, -1 byte checksum */ |
| 657 |
/* read and store data bytes if requested */
|
| 658 |
if (data != BLT_NULL)
|
| 659 |
{
|
| 660 |
for (i=0; i<data_byte_count; i++) |
| 661 |
{
|
| 662 |
data[i] = FileLibHexStringToByte(line); |
| 663 |
line += 2;
|
| 664 |
} |
| 665 |
} |
| 666 |
break;
|
| 667 |
|
| 668 |
default:
|
| 669 |
break;
|
| 670 |
} |
| 671 |
|
| 672 |
return data_byte_count;
|
| 673 |
} /*** end of FileSrecParseLine ***/
|
| 674 |
|
| 675 |
|
| 676 |
#if (BOOT_FILE_LOGGING_ENABLE > 0) |
| 677 |
/************************************************************************************//** |
| 678 |
** \brief Helper function to convert a 4-bit value to a character that represents its
|
| 679 |
** value in hexadecimal format.
|
| 680 |
** Example: FileLibByteNibbleToChar(11) --> returns 'B'.
|
| 681 |
** \param nibble 4-bit value to convert.
|
| 682 |
** \return The resulting byte value.
|
| 683 |
**
|
| 684 |
****************************************************************************************/
|
| 685 |
static blt_char FileLibByteNibbleToChar(blt_int8u nibble)
|
| 686 |
{
|
| 687 |
blt_char c; |
| 688 |
|
| 689 |
/* convert to ASCII value */
|
| 690 |
c = (nibble & 0x0f) + '0'; |
| 691 |
if (nibble > 9) |
| 692 |
{
|
| 693 |
c += 7;
|
| 694 |
} |
| 695 |
else
|
| 696 |
{
|
| 697 |
c = toupper(c); |
| 698 |
} |
| 699 |
/* return the character */
|
| 700 |
return c;
|
| 701 |
} /*** end of FileLibByteNibbleToChar ***/
|
| 702 |
|
| 703 |
|
| 704 |
/************************************************************************************//** |
| 705 |
** \brief Helper function to convert a byte value to a string representing the
|
| 706 |
** value in hexadecimal format.
|
| 707 |
** Example: FileLibByteToHexString(28, strBuffer) --> returns "1C".
|
| 708 |
** \param byte_val 8-bit value to convert.
|
| 709 |
** \param destination Pointer to character buffer for storing the results.
|
| 710 |
** \return The resulting string.
|
| 711 |
**
|
| 712 |
****************************************************************************************/
|
| 713 |
static blt_char *FileLibByteToHexString(blt_int8u byte_val, blt_char *destination)
|
| 714 |
{
|
| 715 |
/* first the most significant n-bit nibble */
|
| 716 |
destination[0] = FileLibByteNibbleToChar(byte_val >> 4); |
| 717 |
/* next the least significant n-bit nibble */
|
| 718 |
destination[1] = FileLibByteNibbleToChar(byte_val & 0x0f); |
| 719 |
/* add string termination */
|
| 720 |
destination[2] = '\0'; |
| 721 |
/* return pointer to resulting string */
|
| 722 |
return destination;
|
| 723 |
} /*** end of FileLibByteToHexString ***/
|
| 724 |
|
| 725 |
|
| 726 |
/************************************************************************************//** |
| 727 |
** \brief Helper function to convert a 32-bit unsigned number to a string that
|
| 728 |
** represents its decimal value.
|
| 729 |
** Example: FileLibLongToIntString(1234, strBuffer) --> returns "1234".
|
| 730 |
** \param long_val 32-bit value to convert.
|
| 731 |
** \param destination Pointer to character buffer for storing the results.
|
| 732 |
** \return The resulting string.
|
| 733 |
**
|
| 734 |
****************************************************************************************/
|
| 735 |
static blt_char *FileLibLongToIntString(blt_int32u long_val, blt_char *destination)
|
| 736 |
{
|
| 737 |
blt_int32u long_val_cpy = long_val; |
| 738 |
|
| 739 |
/* first determine how many digits there will be */
|
| 740 |
do
|
| 741 |
{
|
| 742 |
destination++; |
| 743 |
long_val_cpy /= 10;
|
| 744 |
} |
| 745 |
while (long_val_cpy > 0); |
| 746 |
/* add space for the string termination and add it */
|
| 747 |
*destination = '\0';
|
| 748 |
/* now add the digits from right to left */
|
| 749 |
long_val_cpy = long_val; |
| 750 |
do
|
| 751 |
{
|
| 752 |
/* set write pointer to where the next character should go */
|
| 753 |
destination--; |
| 754 |
/* write digit in ASCII format */
|
| 755 |
*destination = long_val_cpy % 10 + '0'; |
| 756 |
/* move on to the next digit */
|
| 757 |
long_val_cpy /= 10;
|
| 758 |
} |
| 759 |
while (long_val_cpy > 0); |
| 760 |
|
| 761 |
return destination;
|
| 762 |
} /*** end of FileLibLongToIntString ***/
|
| 763 |
#endif /* (BOOT_FILE_LOGGING_ENABLE > 0) */ |
| 764 |
|
| 765 |
|
| 766 |
/************************************************************************************//** |
| 767 |
** \brief Helper function to convert a sequence of 2 characters that represent
|
| 768 |
** a hexadecimal value to the actual byte value.
|
| 769 |
** Example: FileLibHexStringToByte("2f") --> returns 47.
|
| 770 |
** \param hexstring String beginning with 2 characters that represent a hexa-
|
| 771 |
** decimal value.
|
| 772 |
** \return The resulting byte value.
|
| 773 |
**
|
| 774 |
****************************************************************************************/
|
| 775 |
static blt_int8u FileLibHexStringToByte(const blt_char *hexstring) |
| 776 |
{
|
| 777 |
blt_int8u result = 0;
|
| 778 |
blt_char c; |
| 779 |
blt_int8u counter; |
| 780 |
|
| 781 |
/* a hexadecimal character is 2 characters long (i.e 0x4F minus the 0x part) */
|
| 782 |
for (counter=0; counter < 2; counter++) |
| 783 |
{
|
| 784 |
/* read out the character */
|
| 785 |
c = toupper(hexstring[counter]); |
| 786 |
/* check that the character is 0..9 or A..F */
|
| 787 |
if ( (c < '0') || (c > 'F') || ( (c > '9') && (c < 'A') ) ) |
| 788 |
{
|
| 789 |
/* character not valid */
|
| 790 |
return 0; |
| 791 |
} |
| 792 |
/* convert character to 4-bit value (check ASCII table for more info) */
|
| 793 |
c -= '0';
|
| 794 |
if (c > 9) |
| 795 |
{
|
| 796 |
c -= 7;
|
| 797 |
} |
| 798 |
/* add it to the result */
|
| 799 |
result = (result << 4) + c;
|
| 800 |
} |
| 801 |
/* return the results */
|
| 802 |
return result;
|
| 803 |
} /*** end of FileLibHexStringToByte ***/
|
| 804 |
|
| 805 |
#endif /* BOOT_FILE_SYS_ENABLE > 0 */ |
| 806 |
|
| 807 |
|
| 808 |
/*********************************** end of file.c *************************************/
|