Diff: main.cpp

Revision:

0:b802bd2f4cc9

Child:

1:a85b51eeb446

diff -r 000000000000 -r b802bd2f4cc9 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Mar 12 10:24:57 2010 +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    29
+
+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" );
+}