LPC11U24 の内臓EEPROMアクセス

Diff: main.cpp

Revision:

0:09bfe87fd66a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 11 00:40:02 2012 +0000
@@ -0,0 +1,63 @@
+/*    IAP demo : demo code for internal EEPROM memory access
+ *
+ *    LPC11U24FBD64/401 : EEPROM 4KB
+ *    Remark: The top 64 bytes of the EEPROM memory are reserved and cannot be written to.
+ *
+ *     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     MEM_SIZE        256
+#define     TARGET_ADDRESS   64
+
+void    memdump( char *p, char *b, int n );
+int     isprint( int c );
+
+IAP     iap;
+
+
+int main() {
+    char    mem[ MEM_SIZE ];    //  memory, it should be aligned to word boundary
+    char    mem2[ MEM_SIZE ];
+    int     r;
+
+    printf( "IAP: EEPROM writing test\n" );
+    printf( "  device-ID = 0x%08X, serial# = 0x%08X, CPU running %dkHz\n", iap.read_ID(), iap.read_serial(), SystemCoreClock / 1000 );
+
+    for ( int i = 0; i < MEM_SIZE; i++ )
+        mem[ i ]    = i & 0xFF;
+
+    r   = iap.write_eeprom( mem, (char*)TARGET_ADDRESS, MEM_SIZE );
+    printf( "copied: SRAM(0x%08X)->EEPROM(0x%08X) for %d bytes. (result=0x%08X)\n", mem, TARGET_ADDRESS, MEM_SIZE, r );
+
+    r   = iap.read_eeprom( (char*)TARGET_ADDRESS, mem2, MEM_SIZE );
+    printf( "copied: EEPROM(0x%08X)->SRAM(0x%08X) for %d bytes. (result=0x%08X)\n", TARGET_ADDRESS, mem, MEM_SIZE, r );
+
+    // compare
+    r = memcmp(mem, mem2, MEM_SIZE);
+    printf( "compare result     = \"%s\"\n", r ? "FAILED" : "OK" );
+
+    printf( "showing the EEPROM contents...\n" );
+    memdump( (char*)TARGET_ADDRESS, mem2, MEM_SIZE );
+}
+
+
+void memdump( char *base, char *buf, int n ) {
+    unsigned int    *p;
+
+    printf( "  memdump from 0x%08X for %d bytes", (unsigned long)base, n );
+
+    p   = (unsigned int *)((unsigned int)buf & ~(unsigned int)0x3);
+
+    for ( int i = 0; i < (n >> 2); i++, p++ ) {
+        if ( !(i % 4) )
+            printf( "\n  0x%08X :", (unsigned int)base + i * 4 );
+
+        printf( " 0x%08X", *p );
+    }
+
+    printf( "\n" );
+}