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In Application Programming with support for both LPC1768 and LPC2368. Original library here http://mbed.org/users/okano/notebook/iap-in-application-programming-internal-flash-eras/
Diff: main.cpp
- Revision:
- 0:406ffaf4d93c
diff -r 000000000000 -r 406ffaf4d93c main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Jul 11 01:53:18 2011 +0000 @@ -0,0 +1,118 @@ +/** IAP demo : demo code for 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 + * + * This main.cpp demonstrates how the flash can be erased and wrote. + * + * This program tries to... + * 0. read device ID and serial# + * 1. check if the targat sector blank + * 2. erase the sector if it was not blank + * 3. write into the flash (prepare before write) + * 4. verify the data by IAP command + * 5. show the content of the flash + * + * The Flash must be erased as sectors. No overwrite can be done like SRAM. + * So erase should be done in size of 4K or 32K. + * + * Writing sector can be done with size of 256, 512, 1024 or 4096. + * If other size is used, the IAP returns an error. + * The SRAM memory should be allocated in + * + * + * 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 + */ + +#include "mbed.h" +#include "IAP.h" + +#define MEM_SIZE 256 +#define TARGET_SECTOR 26 + +void memdump( char *p, int n ); +int isprint( int c ); + +IAP iap; + + +int main() { + char mem[ MEM_SIZE ]; // memory, it should be aligned to word boundary + int r; + + printf( "IAP: Flash memory writing test\n" ); + printf( " device-ID = 0x%08X, serial# = 0x%08X, CPU running %dkHz\n", iap.read_ID(), iap.read_serial(), SystemCoreClock / 1000 ); + printf( " user reserved flash area: start_address=0x%08X, size=%d bytes\n", iap.reserved_flash_area_start(), iap.reserved_flash_area_size() ); + + for ( int i = 0; i < MEM_SIZE; i++ ) + mem[ i ] = i & 0xFF; + + // blank check: The mbed will erase all flash contents after downloading new executable + + r = iap.blank_check( TARGET_SECTOR, TARGET_SECTOR ); + printf( "blank check result = 0x%08X\n", r ); + + // erase sector, if required + + // if ( r == SECTOR_NOT_BLANK ) { + iap.prepare( TARGET_SECTOR, TARGET_SECTOR ); + r = iap.erase( TARGET_SECTOR, TARGET_SECTOR ); + printf( "erase result = 0x%08X\n", r ); + //} + + // copy RAM to Flash + + iap.prepare( TARGET_SECTOR, TARGET_SECTOR ); + r = iap.write( mem, sector_start_adress[ TARGET_SECTOR ], MEM_SIZE ); + printf( "copied: SRAM(0x%08X)->Flash(0x%08X) for %d bytes. (result=0x%08X)\n", mem, sector_start_adress[ TARGET_SECTOR ], MEM_SIZE, r ); + + // compare + + r = iap.compare( mem, sector_start_adress[ TARGET_SECTOR ], MEM_SIZE ); + printf( "compare result = \"%s\"\n", r ? "FAILED" : "OK" ); + +//#define WRITE_NEXT_BLOCK +#ifdef WRITE_NEXT_BLOCK + + // copy RAM to Flash + + iap.prepare( TARGET_SECTOR, TARGET_SECTOR ); + r = iap.write( mem, sector_start_adress[ TARGET_SECTOR ] + 256, MEM_SIZE ); + printf( "copied: SRAM(0x%08X)->Flash(0x%08X) for %d bytes. (result=0x%08X)\n", mem, sector_start_adress[ TARGET_SECTOR ], MEM_SIZE, r ); + + // compare + + r = iap.compare( mem, sector_start_adress[ TARGET_SECTOR ] + 256, MEM_SIZE ); + printf( "compare result = \"%s\"\n", r ? "FAILED" : "OK" ); + +#endif + + printf( "showing the flash contents...\n" ); + memdump( sector_start_adress[ TARGET_SECTOR ], MEM_SIZE * 3 ); +} + + +void memdump( char *base, int n ) { + unsigned int *p; + + printf( " memdump from 0x%08X for %d bytes", (unsigned long)base, n ); + + p = (unsigned int *)((unsigned int)base & ~(unsigned int)0x3); + + for ( int i = 0; i < (n >> 2); i++, p++ ) { + if ( !(i % 4) ) + printf( "\n 0x%08X :", (unsigned int)p ); + + printf( " 0x%08X", *p ); + } + + printf( "\n" ); +}