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Aes encryption code
Dependencies: Crypto USBDevice mbed
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Diff: IAP.cpp
- Revision:
- 0:aaf22a04f350
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/IAP.cpp Thu Feb 04 03:42:24 2016 +0000 @@ -0,0 +1,248 @@ +/** IAP : internal Flash memory access library + * + * The internal Flash memory access is described in the LPC1768 usermanual. + * http://www.nxp.com/documents/user_manual/UM10360.pdf + * + * Chapter 2: "LPC17xx Memory map" + * Chapter 32: "LPC17xx Flash memory interface and programming" + * refering Rev. 01 - 4 January 2010 + * + * Released under the MIT License: http://mbed.org/license/mit + * + * revision 1.0 09-Mar-2010 1st release + * revision 1.1 12-Mar-2010 chaged: to make possible to reserve flash area for user + * it can be set by USER_FLASH_AREA_START and USER_FLASH_AREA_SIZE in IAP.h + * + * by Tedd OKANO http://mbed.org/users/okano/notebook/iap-in-application-programming-internal-flash-eras/ + * modified by Suga (supported to LPC11U24) + */ + +#include "mbed.h" +#include "IAP.h" + +#define USER_FLASH_AREA_START_STR( x ) STR( x ) +#define STR( x ) #x + +unsigned char user_area[ USER_FLASH_AREA_SIZE ] __attribute__((section( ".ARM.__at_" USER_FLASH_AREA_START_STR( USER_FLASH_AREA_START ) ), zero_init)); + + +/* + * Reserve of flash area is explained by Igor. Please refer next URL + * http://mbed.org/users/okano/notebook/iap-in-application-programming-internal-flash-eras/?page=1#comment-271 + */ + +//unsigned char user_area[ size ] __attribute__((section(".ARM.__at_0x78000"), zero_init)); + +/* + * IAP command codes + * Table 589. "IAP Command Summary", Chapter 8. "IAP commands", usermanual + */ + +enum command_code + { + IAPCommand_Prepare_sector_for_write_operation = 50, + IAPCommand_Copy_RAM_to_Flash, + IAPCommand_Erase_sector, + IAPCommand_Blank_check_sector, + IAPCommand_Read_part_ID, + IAPCommand_Read_Boot_Code_version, + IAPCommand_Compare, + IAPCommand_Reinvoke_ISP, + IAPCommand_Read_device_serial_number, + IAPCommand_EEPROM_Write = 61, + IAPCommand_EEPROM_Read, + }; + + +/** Read part identification number + * + * @return device ID + * @see read_serial() + */ + +int IAP::read_ID( void ) { + IAP_command[ 0 ] = IAPCommand_Read_part_ID; + + iap_entry( IAP_command, IAP_result ); + + // return ( (int)IAP_result[ 0 ] ); + return ( (int)IAP_result[ 1 ] ); // to return the number itself (this command always returns CMD_SUCCESS) +} + + +/** Read device serial number + * + * @return device serial number + * @see read_ID() + */ + +int IAP::read_serial( void ) { + IAP_command[ 0 ] = IAPCommand_Read_device_serial_number; + + iap_entry( IAP_command, IAP_result ); + + // return ( (int)IAP_result[ 0 ] ); + return ( (int)IAP_result[ 1 ] ); // to return the number itself (this command always returns CMD_SUCCESS) +} + + +/** Blank check sector(s) + * + * @param start a Start Sector Number + * @param end an End Sector Number (should be greater than or equal to start sector number). + * @return error code: CMD_SUCCESS | BUSY | SECTOR_NOT_BLANK | INVALID_SECTOR + */ + +int IAP::blank_check( int start, int end ) { + IAP_command[ 0 ] = IAPCommand_Blank_check_sector; + IAP_command[ 1 ] = (unsigned int)start; // Start Sector Number + IAP_command[ 2 ] = (unsigned int)end; // End Sector Number (should be greater than or equal to start sector number) + + iap_entry( IAP_command, IAP_result ); + + return ( (int)IAP_result[ 0 ] ); +} + + +/** Erase Sector(s) + * + * @param start a Start Sector Number + * @param end an End Sector Number (should be greater than or equal to start sector number). + * @return error code: CMD_SUCCESS | BUSY | SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION | INVALID_SECTOR + */ + +int IAP::erase( int start, int end ) { + IAP_command[ 0 ] = IAPCommand_Erase_sector; + IAP_command[ 1 ] = (unsigned int)start; // Start Sector Number + IAP_command[ 2 ] = (unsigned int)end; // End Sector Number (should be greater than or equal to start sector number) + IAP_command[ 3 ] = cclk_kHz; // CPU Clock Frequency (CCLK) in kHz + + iap_entry( IAP_command, IAP_result ); + + return ( (int)IAP_result[ 0 ] ); +} + + +/** Prepare sector(s) for write operation + * + * @param start a Start Sector Number + * @param end an End Sector Number (should be greater than or equal to start sector number). + * @return error code: CMD_SUCCESS | BUSY | INVALID_SECTOR + */ + +int IAP::prepare( int start, int end ) { + IAP_command[ 0 ] = IAPCommand_Prepare_sector_for_write_operation; + IAP_command[ 1 ] = (unsigned int)start; // Start Sector Number + IAP_command[ 2 ] = (unsigned int)end; // End Sector Number (should be greater than or equal to start sector number). + + iap_entry( IAP_command, IAP_result ); + + return ( (int)IAP_result[ 0 ] ); +} + + +/** Copy RAM to Flash + * + * @param source_addr Source RAM address from which data bytes are to be read. This address should be a word boundary. + * @param target_addr Destination flash address where data bytes are to be written. This address should be a 256 byte boundary. + * @param size Number of bytes to be written. Should be 256 | 512 | 1024 | 4096. + * @return error code: CMD_SUCCESS | SRC_ADDR_ERROR (Address not a word boundary) | DST_ADDR_ERROR (Address not on correct boundary) | SRC_ADDR_NOT_MAPPED | DST_ADDR_NOT_MAPPED | COUNT_ERROR (Byte count is not 256 | 512 | 1024 | 4096) | SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION | BUSY + */ + +int IAP::write( char *source_addr, char *target_addr, int size ) { + IAP_command[ 0 ] = IAPCommand_Copy_RAM_to_Flash; + IAP_command[ 1 ] = (unsigned int)target_addr; // Destination flash address where data bytes are to be written. This address should be a 256 byte boundary. + IAP_command[ 2 ] = (unsigned int)source_addr; // Source RAM address from which data bytes are to be read. This address should be a word boundary. + IAP_command[ 3 ] = size; // Number of bytes to be written. Should be 256 | 512 | 1024 | 4096. + IAP_command[ 4 ] = cclk_kHz; // CPU Clock Frequency (CCLK) in kHz. + + iap_entry( IAP_command, IAP_result ); + + return ( (int)IAP_result[ 0 ] ); +} + + +/** Compare <address1> <address2> <no of bytes> + * + * @param source_addr Starting flash or RAM address of data bytes to be compared. This address should be a word boundary. + * @param target_addr Starting flash or RAM address of data bytes to be compared. This address should be a word boundary. + * @param size Number of bytes to be compared; should be a multiple of 4. + * @return error code: CMD_SUCCESS | COMPARE_ERROR | COUNT_ERROR (Byte count is not a multiple of 4) | ADDR_ERROR | ADDR_NOT_MAPPED + */ + +int IAP::compare( char *source_addr, char *target_addr, int size ) { + IAP_command[ 0 ] = IAPCommand_Compare; + IAP_command[ 1 ] = (unsigned int)target_addr; // Starting flash or RAM address of data bytes to be compared. This address should be a word boundary. + IAP_command[ 2 ] = (unsigned int)source_addr; // Starting flash or RAM address of data bytes to be compared. This address should be a word boundary. + IAP_command[ 3 ] = size; // Number of bytes to be compared; should be a multiple of 4. + + iap_entry( IAP_command, IAP_result ); + + return ( (int)IAP_result[ 0 ] ); +} + + +/** Get user reserved flash start address + * + * @return start address of user reserved flash memory + * @see reserved_flash_area_size() + */ + +char * IAP::reserved_flash_area_start( void ) +{ + return ( (char *)USER_FLASH_AREA_START ); +} + + +/** Get user reserved flash size + * + * @return size of user reserved flash memory + * @see reserved_flash_area_start() + */ + +int IAP::reserved_flash_area_size( void ) +{ + return ( USER_FLASH_AREA_SIZE ); +} + +#if defined(TARGET_LPC11U24) +/** Copy RAM to EEPROM (LPC11U24) + * + * @param source_addr Source RAM address from which data bytes are to be read. + * @param target_addr Destination EEPROM address where data bytes are to be written. + * @param size Number of bytes to be written. + * @return error code: CMD_SUCCESS | SRC_ADDR_NOT_MAPPED | DST_ADDR_NOT_MAPPED + * Remark: The top 64 bytes of the EEPROM memory are reserved and cannot be written to. + */ +int IAP::write_eeprom( char *source_addr, char *target_addr, int size ) { + IAP_command[ 0 ] = IAPCommand_EEPROM_Write; + IAP_command[ 1 ] = (unsigned int)target_addr; // Destination EEPROM address where data bytes are to be written. This address should be a 256 byte boundary. + IAP_command[ 2 ] = (unsigned int)source_addr; // Source RAM address from which data bytes are to be read. This address should be a word boundary. + IAP_command[ 3 ] = size; // Number of bytes to be written. Should be 256 | 512 | 1024 | 4096. + IAP_command[ 4 ] = cclk_kHz; // CPU Clock Frequency (CCLK) in kHz. + + iap_entry( IAP_command, IAP_result ); + + return ( (int)IAP_result[ 0 ] ); +} + +/** Copy EEPROM to RAM (LPC11U24) + * + * @param source_addr Source EEPROM address from which data bytes are to be read. + * @param target_addr Destination RAM address where data bytes are to be written. + * @param size Number of bytes to be written. + * @return error code: CMD_SUCCESS | SRC_ADDR_NOT_MAPPED | DST_ADDR_NOT_MAPPED + * Remark: The top 64 bytes of the EEPROM memory are reserved and cannot be written to. + */ +int IAP::read_eeprom( char *source_addr, char *target_addr, int size ) { + IAP_command[ 0 ] = IAPCommand_EEPROM_Read; + IAP_command[ 1 ] = (unsigned int)source_addr; // Source EEPROM address from which data bytes are to be read. This address should be a word boundary. + IAP_command[ 2 ] = (unsigned int)target_addr; // Destination RAM address where data bytes are to be written. This address should be a 256 byte boundary. + IAP_command[ 3 ] = size; // Number of bytes to be written. Should be 256 | 512 | 1024 | 4096. + IAP_command[ 4 ] = cclk_kHz; // CPU Clock Frequency (CCLK) in kHz. + + iap_entry( IAP_command, IAP_result ); + + return ( (int)IAP_result[ 0 ] ); +} +#endif