Tedd OKANO
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__IAP_sector28write
IAP program sample to write sector28 (address 0x00070000)
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IAP.cpp
00001 /** IAP : internal Flash memory access library 00002 * 00003 * The internal Flash memory access is described in the LPC1768 usermanual. 00004 * http://www.nxp.com/documents/user_manual/UM10360.pdf 00005 * 00006 * Chapter 2: "LPC17xx Memory map" 00007 * Chapter 32: "LPC17xx Flash memory interface and programming" 00008 * refering Rev. 01 - 4 January 2010 00009 * 00010 * Released under the MIT License: http://mbed.org/license/mit 00011 * 00012 * revision 1.0 09-Mar-2010 1st release 00013 * revision 1.1 12-Mar-2010 chaged: to make possible to reserve flash area for user 00014 * it can be set by USER_FLASH_AREA_START and USER_FLASH_AREA_SIZE in IAP.h 00015 */ 00016 00017 #include "mbed.h" 00018 #include "IAP.h" 00019 00020 #define USER_FLASH_AREA_START_STR( x ) STR( x ) 00021 #define STR( x ) #x 00022 00023 unsigned char user_area[ USER_FLASH_AREA_SIZE ] __attribute__((section( ".ARM.__at_" USER_FLASH_AREA_START_STR( USER_FLASH_AREA_START ) ), zero_init)); 00024 00025 00026 /* 00027 * Reserve of flash area is explained by Igor. Please refer next URL 00028 * http://mbed.org/users/okano/notebook/iap-in-application-programming-internal-flash-eras/?page=1#comment-271 00029 */ 00030 00031 //unsigned char user_area[ size ] __attribute__((section(".ARM.__at_0x78000"), zero_init)); 00032 00033 /* 00034 * IAP command codes 00035 * Table 589. "IAP Command Summary", Chapter 8. "IAP commands", usermanual 00036 */ 00037 00038 enum command_code 00039 { 00040 IAPCommand_Prepare_sector_for_write_operation = 50, 00041 IAPCommand_Copy_RAM_to_Flash, 00042 IAPCommand_Erase_sector, 00043 IAPCommand_Blank_check_sector, 00044 IAPCommand_Read_part_ID, 00045 IAPCommand_Read_Boot_Code_version, 00046 IAPCommand_Compare, 00047 IAPCommand_Reinvoke_ISP, 00048 IAPCommand_Read_device_serial_number 00049 }; 00050 00051 00052 /** Read part identification number 00053 * 00054 * @return device ID 00055 * @see read_serial() 00056 */ 00057 00058 int IAP::read_ID( void ) { 00059 IAP_command[ 0 ] = IAPCommand_Read_part_ID; 00060 00061 iap_entry( IAP_command, IAP_result ); 00062 00063 // return ( (int)IAP_result[ 0 ] ); 00064 return ( (int)IAP_result[ 1 ] ); // to return the number itself (this command always returns CMD_SUCCESS) 00065 } 00066 00067 00068 /** Read device serial number 00069 * 00070 * @return device serial number 00071 * @see read_ID() 00072 */ 00073 00074 int IAP::read_serial( void ) { 00075 IAP_command[ 0 ] = IAPCommand_Read_device_serial_number; 00076 00077 iap_entry( IAP_command, IAP_result ); 00078 00079 // return ( (int)IAP_result[ 0 ] ); 00080 return ( (int)IAP_result[ 1 ] ); // to return the number itself (this command always returns CMD_SUCCESS) 00081 } 00082 00083 00084 /** Blank check sector(s) 00085 * 00086 * @param start a Start Sector Number 00087 * @param end an End Sector Number (should be greater than or equal to start sector number). 00088 * @return error code: CMD_SUCCESS | BUSY | SECTOR_NOT_BLANK | INVALID_SECTOR 00089 */ 00090 00091 int IAP::blank_check( int start, int end ) { 00092 IAP_command[ 0 ] = IAPCommand_Blank_check_sector; 00093 IAP_command[ 1 ] = (unsigned int)start; // Start Sector Number 00094 IAP_command[ 2 ] = (unsigned int)end; // End Sector Number (should be greater than or equal to start sector number) 00095 00096 iap_entry( IAP_command, IAP_result ); 00097 00098 return ( (int)IAP_result[ 0 ] ); 00099 } 00100 00101 00102 /** Erase Sector(s) 00103 * 00104 * @param start a Start Sector Number 00105 * @param end an End Sector Number (should be greater than or equal to start sector number). 00106 * @return error code: CMD_SUCCESS | BUSY | SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION | INVALID_SECTOR 00107 */ 00108 00109 int IAP::erase( int start, int end ) { 00110 IAP_command[ 0 ] = IAPCommand_Erase_sector; 00111 IAP_command[ 1 ] = (unsigned int)start; // Start Sector Number 00112 IAP_command[ 2 ] = (unsigned int)end; // End Sector Number (should be greater than or equal to start sector number) 00113 IAP_command[ 3 ] = cclk_kHz; // CPU Clock Frequency (CCLK) in kHz 00114 00115 iap_entry( IAP_command, IAP_result ); 00116 00117 return ( (int)IAP_result[ 0 ] ); 00118 } 00119 00120 00121 /** Prepare sector(s) for write operation 00122 * 00123 * @param start a Start Sector Number 00124 * @param end an End Sector Number (should be greater than or equal to start sector number). 00125 * @return error code: CMD_SUCCESS | BUSY | INVALID_SECTOR 00126 */ 00127 00128 int IAP::prepare( int start, int end ) { 00129 IAP_command[ 0 ] = IAPCommand_Prepare_sector_for_write_operation; 00130 IAP_command[ 1 ] = (unsigned int)start; // Start Sector Number 00131 IAP_command[ 2 ] = (unsigned int)end; // End Sector Number (should be greater than or equal to start sector number). 00132 00133 iap_entry( IAP_command, IAP_result ); 00134 00135 return ( (int)IAP_result[ 0 ] ); 00136 } 00137 00138 00139 /** Copy RAM to Flash 00140 * 00141 * @param source_addr Source RAM address from which data bytes are to be read. This address should be a word boundary. 00142 * @param target_addr Destination flash address where data bytes are to be written. This address should be a 256 byte boundary. 00143 * @param size Number of bytes to be written. Should be 256 | 512 | 1024 | 4096. 00144 * @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 00145 */ 00146 00147 int IAP::write( char *source_addr, char *target_addr, int size ) { 00148 IAP_command[ 0 ] = IAPCommand_Copy_RAM_to_Flash; 00149 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. 00150 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. 00151 IAP_command[ 3 ] = size; // Number of bytes to be written. Should be 256 | 512 | 1024 | 4096. 00152 IAP_command[ 4 ] = cclk_kHz; // CPU Clock Frequency (CCLK) in kHz. 00153 00154 iap_entry( IAP_command, IAP_result ); 00155 00156 return ( (int)IAP_result[ 0 ] ); 00157 } 00158 00159 00160 /** Compare <address1> <address2> <no of bytes> 00161 * 00162 * @param source_addr Starting flash or RAM address of data bytes to be compared. This address should be a word boundary. 00163 * @param target_addr Starting flash or RAM address of data bytes to be compared. This address should be a word boundary. 00164 * @param size Number of bytes to be compared; should be a multiple of 4. 00165 * @return error code: CMD_SUCCESS | COMPARE_ERROR | COUNT_ERROR (Byte count is not a multiple of 4) | ADDR_ERROR | ADDR_NOT_MAPPED 00166 */ 00167 00168 int IAP::compare( char *source_addr, char *target_addr, int size ) { 00169 IAP_command[ 0 ] = IAPCommand_Compare; 00170 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. 00171 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. 00172 IAP_command[ 3 ] = size; // Number of bytes to be compared; should be a multiple of 4. 00173 00174 iap_entry( IAP_command, IAP_result ); 00175 00176 return ( (int)IAP_result[ 0 ] ); 00177 } 00178 00179 00180 /** Get user reserved flash start address 00181 * 00182 * @return start address of user reserved flash memory 00183 * @see reserved_flash_area_size() 00184 */ 00185 00186 char * IAP::reserved_flash_area_start( void ) 00187 { 00188 return ( (char *)USER_FLASH_AREA_START ); 00189 } 00190 00191 00192 /** Get user reserved flash size 00193 * 00194 * @return size of user reserved flash memory 00195 * @see reserved_flash_area_start() 00196 */ 00197 00198 int IAP::reserved_flash_area_size( void ) 00199 { 00200 return ( USER_FLASH_AREA_SIZE ); 00201 } 00202
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