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Posted: Nov 08, 2005 - 03:54 PM
I am having trouble putting code into the last page of flash (0xFE00 to 0xFFFF). I am working on a boot loader that would have the page write protected. I tried:
SEGMENTS Z_RAM = READ_WRITE 0x0080 TO 0x00FF; RAM = READ_WRITE 0x0100 TO 0x103F; STK_AREA = READ_WRITE 0x1040 TO 0x107F; ROM1 = READ_ONLY 0x1080 TO 0x17FF; ROM2 = READ_ONLY 0x182C TO 0xFDFF; BOOT_LOADER = READ_ONLY 0xFE00 TO 0xFEFF; BOARD_PARAMS = READ_ONLY 0xFFB0 TO 0xFFB7; END
DEFAULT_ROM INTO ROM1,ROM2,BOARD_PARAMS, BOOT_LOADER; DEFAULT_RAM INTO RAM; SSTACK INTO STK_AREA; _DATA_ZEROPAGE, MY_ZEROPAGE INTO Z_RAM; END
But it does not seem to put it into the proper flash location. Any suggestions. I am also trying to put the Securtiy key into flash (0xFFB0 to 0xFFB7) using somewhat the same technique. Any help on Segments and Placements would be appreciated.
Posted: Nov 09, 2005 - 04:00 PM
OK, I figured this out with the help of AN2295 and AN2295SW. These were a great help and cover a lot of the details I was curious about.