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ErasingFlashFromUBootFails
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%SECTION0{name=ErasingFlashFails}% Erasing Flash Fails Question:: I tried to erase the flash memory like <verbatim> erase 40050000 40050100 </verbatim> It fails. What am I doing wrong? Answer:: Remember that flash memory cannot be erased in arbitrary areas, but only in so called "erase regions" or "sectors". If you have U-Boot running you can use the =flinfo= (Flash information, short =fli=) command to print information about the flash memory on your board, for instance: <verbatim> => fli Bank # 1: AMD AM29LV160B (16 Mbit, bottom boot sect) Size: 4 MB in 35 Sectors Sector Start Addresses: 40000000 (RO) 40008000 (RO) 4000C000 (RO) 40010000 (RO) 40020000 (RO) 40040000 40060000 40080000 400A0000 400C0000 400E0000 40100000 40120000 40140000 40160000 40180000 401A0000 401C0000 401E0000 40200000 40220000 40240000 40260000 40280000 402A0000 402C0000 402E0000 40300000 40320000 40340000 40360000 40380000 403A0000 403C0000 403E0000 </verbatim> In the example above, the area 40050000 ... 40050100 lies right in the middle of a erase unit (40040000 ... 4005FFFF), so you cannot erase it without erasing the whole sector, i. e. you have to type <verbatim> => erase 40040000 4005FFFF </verbatim> Also note that there are some sectors marked as read-only (=(RO)=); you cannot erase or overwrite these sectors without un-protecting the sectors first (see the U-Boot =protect= command).
14.2.11. How Can I Reduce The Image Size?
1. Abstract
14.2.13. Ethernet Does Not Work
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