Revision 0:34dda9d8ed01, committed 2012-01-20

Comitter:

okano

Date:

Fri Jan 20 08:56:34 2012 +0000

Commit message:

Just a sample to confirm the behavior

Changed in this revision

diff -r 000000000000 -r 34dda9d8ed01 IAP.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/IAP.cpp	Fri Jan 20 08:56:34 2012 +0000
@@ -0,0 +1,202 @@
+/**    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
+ */
+
+#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
+        };
+
+
+/** 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 );
+}
+

diff -r 000000000000 -r 34dda9d8ed01 IAP.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/IAP.h	Fri Jan 20 08:56:34 2012 +0000
@@ -0,0 +1,222 @@
+/**    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
+ */
+
+#ifndef        MBED_IAP
+#define        MBED_IAP
+
+#include    "mbed.h"
+
+#define     USER_FLASH_AREA_START   FLASH_SECTOR_29
+#define     USER_FLASH_AREA_SIZE    (FLASH_SECTOR_SIZE_16_TO_29 * 1)
+
+/*
+ *  memory map information is available in next URL also.
+ *    http://mbed.org/projects/libraries/svn/mbed/trunk/LPC1768/LPC17xx.h
+ */
+ 
+/**    Table for start adress of sectors
+ *    
+ *        LPC1768 internal flash memory sector numbers and addresses
+ *
+ *        LPC1768 flash memory are and sector number/size
+ *        Table 568 "Sectors in a LPC17xx device", Section 5. "Sector numbers", usermanual
+ *
+ *        0x00000000 - 0x0007FFFF        flash (29 sectors)
+ *
+ *      Sector0:     0x00000000 - 0x00000FFF        4K
+ *      Sector1:     0x00001000 - 0x00001FFF        4K
+ *      Sector2:     0x00002000 - 0x00002FFF        4K
+ *      Sector3:     0x00003000 - 0x00003FFF        4K
+ *      Sector4:     0x00004000 - 0x00004FFF        4K
+ *      Sector5:     0x00005000 - 0x00005FFF        4K
+ *      Sector6:     0x00006000 - 0x00006FFF        4K
+ *      Sector7:     0x00007000 - 0x00007FFF        4K
+ *      Sector8:     0x00008000 - 0x00008FFF        4K
+ *      Sector9:     0x00009000 - 0x00009FFF        4K
+ *      Sector10:    0x0000A000 - 0x0000AFFF        4K
+ *      Sector11:    0x0000B000 - 0x0000BFFF        4K
+ *      Sector12:    0x0000C000 - 0x0000CFFF        4K
+ *      Sector13:    0x0000D000 - 0x0000DFFF        4K
+ *      Sector14:    0x0000E000 - 0x0000EFFF        4K
+ *      Sector15:    0x0000F000 - 0x0000FFFF        4K
+ *
+ *      Sector16:    0x00010000 - 0x00017FFF        32K
+ *      Sector17:    0x00018000 - 0x0001FFFF        32K
+ *      Sector18:    0x00020000 - 0x00027FFF        32K
+ *      Sector19:    0x00028000 - 0x0002FFFF        32K
+ *      Sector20:    0x00030000 - 0x00037FFF        32K
+ *      Sector21:    0x00038000 - 0x0003FFFF        32K
+ *      Sector22:    0x00040000 - 0x00047FFF        32K
+ *      Sector23:    0x00048000 - 0x0004FFFF        32K
+ *      Sector24:    0x00050000 - 0x00057FFF        32K
+ *      Sector25:    0x00058000 - 0x0005FFFF        32K
+ *      Sector26:    0x00060000 - 0x00067FFF        32K
+ *      Sector27:    0x00068000 - 0x0006FFFF        32K
+ *      Sector28:    0x00070000 - 0x00077FFF        32K
+ *      Sector29:    0x00078000 - 0x0007FFFF        32K
+ */
+ 
+#define     FLASH_SECTOR_0       0x00000000
+#define     FLASH_SECTOR_1       0x00001000
+#define     FLASH_SECTOR_2       0x00002000
+#define     FLASH_SECTOR_3       0x00003000
+#define     FLASH_SECTOR_4       0x00004000
+#define     FLASH_SECTOR_5       0x00005000
+#define     FLASH_SECTOR_6       0x00006000
+#define     FLASH_SECTOR_7       0x00007000
+#define     FLASH_SECTOR_8       0x00008000
+#define     FLASH_SECTOR_9       0x00009000
+#define     FLASH_SECTOR_10      0x0000A000
+#define     FLASH_SECTOR_11      0x0000B000
+#define     FLASH_SECTOR_12      0x0000C000
+#define     FLASH_SECTOR_13      0x0000D000
+#define     FLASH_SECTOR_14      0x0000E000
+#define     FLASH_SECTOR_15      0x0000F000
+#define     FLASH_SECTOR_16      0x00010000
+#define     FLASH_SECTOR_17      0x00018000
+#define     FLASH_SECTOR_18      0x00020000
+#define     FLASH_SECTOR_19      0x00028000
+#define     FLASH_SECTOR_20      0x00030000
+#define     FLASH_SECTOR_21      0x00038000
+#define     FLASH_SECTOR_22      0x00040000
+#define     FLASH_SECTOR_23      0x00048000
+#define     FLASH_SECTOR_24      0x00050000
+#define     FLASH_SECTOR_25      0x00058000
+#define     FLASH_SECTOR_26      0x00060000
+#define     FLASH_SECTOR_27      0x00068000
+#define     FLASH_SECTOR_28      0x00070000
+#define     FLASH_SECTOR_29      0x00078000
+
+#define     FLASH_SECTOR_SIZE_0_TO_15    ( 4 * 1024)
+#define     FLASH_SECTOR_SIZE_16_TO_29   (32 * 1024)
+
+static char * sector_start_adress[]    = {
+    (char *)FLASH_SECTOR_0,
+    (char *)FLASH_SECTOR_1,
+    (char *)FLASH_SECTOR_2,
+    (char *)FLASH_SECTOR_3,
+    (char *)FLASH_SECTOR_4,
+    (char *)FLASH_SECTOR_5,
+    (char *)FLASH_SECTOR_6,
+    (char *)FLASH_SECTOR_7,
+    (char *)FLASH_SECTOR_8,
+    (char *)FLASH_SECTOR_9,
+    (char *)FLASH_SECTOR_10,
+    (char *)FLASH_SECTOR_11,
+    (char *)FLASH_SECTOR_12,
+    (char *)FLASH_SECTOR_13,
+    (char *)FLASH_SECTOR_14,
+    (char *)FLASH_SECTOR_15,
+    (char *)FLASH_SECTOR_16,
+    (char *)FLASH_SECTOR_17,
+    (char *)FLASH_SECTOR_18,
+    (char *)FLASH_SECTOR_19,
+    (char *)FLASH_SECTOR_20,
+    (char *)FLASH_SECTOR_21,
+    (char *)FLASH_SECTOR_22,
+    (char *)FLASH_SECTOR_23,
+    (char *)FLASH_SECTOR_24,
+    (char *)FLASH_SECTOR_25,
+    (char *)FLASH_SECTOR_26,
+    (char *)FLASH_SECTOR_27,
+    (char *)FLASH_SECTOR_28,
+    (char *)FLASH_SECTOR_29    
+};
+
+
+/**    Error code by IAP routine
+ *  
+ *        Table 588 "ISP Return Codes Summary", Section 7.15 "ISP Return Codes", usermanual
+ */
+
+enum error_code
+    {
+            CMD_SUCCESS,
+            INVALID_COMMAND,
+            SRC_ADDR_ERROR,
+            DST_ADDR_ERROR,
+            SRC_ADDR_NOT_MAPPED,
+            DST_ADDR_NOT_MAPPED,
+            COUNT_ERROR,
+            INVALID_SECTOR,
+            SECTOR_NOT_BLANK,
+            SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION,
+            COMPARE_ERROR,
+            BUSY,
+            PARAM_ERROR,
+            ADDR_ERROR,
+            ADDR_NOT_MAPPED,
+            CMD_LOCKED,
+            INVALID_CODE,
+            INVALID_BAUD_RATE,
+            INVALID_STOP_BIT,
+            CODE_READ_PROTECTION_ENABLED
+    };
+
+
+
+/*
+ *  IAP routine entry
+ *
+ *        Chapter 8. "IAP commands", usermanual
+ */
+
+#define     IAP_LOCATION    0x1fff1ff1
+typedef     void (*IAP_call)(unsigned int [], unsigned int []);
+
+/**    IAP class
+ *  
+ *        Interface for internal flash memory access
+ */
+
+
+class IAP {
+public:
+
+    /*
+     *  SystemCoreClock ??? :  
+     *    http://mbed.org/forum/mbed/topic/229/
+     *    http://mbed.org/users/simon/programs/SystemCoreClock/16mhsh/
+     */
+
+    
+    /**    Constructor for IAP
+     *
+     */
+
+    IAP() : iap_entry( reinterpret_cast<IAP_call>(IAP_LOCATION) ), cclk_kHz( SystemCoreClock / 1000 ) {}
+    int read_ID( void );
+    int read_serial( void );
+    int blank_check( int start, int end );
+    int erase( int start, int end );
+    int prepare( int start, int end );
+    int write( char *source_addr, char *target_addr, int size );
+    int compare( char *source_addr, char *target_addr, int size );
+    
+    char *reserved_flash_area_start( void );
+    int   reserved_flash_area_size( void );
+
+private:
+    IAP_call        iap_entry;
+    unsigned int    IAP_command[ 5 ];
+    unsigned int    IAP_result[ 5 ];
+    int             cclk_kHz;
+    
+    //int cpu_clock( void );
+}
+;
+
+#endif    //  #ifndef  MBED_IAP

diff -r 000000000000 -r 34dda9d8ed01 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jan 20 08:56:34 2012 +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    28
+
+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( "\r\n\r\n\r\nIAP: Flash memory writing test\r\n" );
+    printf( "  device-ID = 0x%08X, serial# = 0x%08X, CPU running %dkHz\r\n", iap.read_ID(), iap.read_serial(), SystemCoreClock / 1000 );
+    printf( "  user reserved flash area: start_address=0x%08X, size=%d bytes\r\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\r\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\r\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)\r\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\"\r\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\"\r\n", r ? "FAILED" : "OK" );
+
+#endif
+
+    printf( "showing the flash contents...\n" );
+    memdump( sector_start_adress[ TARGET_SECTOR ], MEM_SIZE );
+}
+
+
+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( "\r\n  0x%08X :", (unsigned int)p );
+
+        printf( " 0x%08X", *p );
+    }
+
+    printf( "\r\n" );
+}

diff -r 000000000000 -r 34dda9d8ed01 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Jan 20 08:56:34 2012 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/49a220cc26e0