AM3352: EEPROM Read sector wise command

Hi Kemal,

Thanks i followed below commands to read

U-Boot# eeprom read 0 0x50 0x82000000 0 0x10

U-Boot# md 0x82000000

U-Boot# eeprom write 0 0x50 0x5455 0 0x4

i got following error

U-Boot# eeprom write 0 0x50 0x5544 0 0x4

EEPROM @0x50 write: addr 00005544 off 0000 count 4 ... data abort
pc : [<9ff7229e>] lr : [<9ff90781>]
reloc pc : [<8080129e>] lr : [<8081f781>]
sp : 9df46a34 ip : 00000002 fp : 9ffb9c34
r10: 9df51620 r9 : 9df50eb8 r8 : 9df46a48
r7 : 9df46a48 r6 : 9df51f90 r5 : 00005544 r4 : 00000004
r3 : 00000006 r2 : 00000000 r1 : 00005544 r0 : 9df46a42
Flags: nZCv IRQs off FIQs on Mode SVC_32 (T)
Code: bfc8 f811 3b01 bfa8 (f811) 4b01
Resetting CPU ...

Write is not happening is above command is correct to write eeprom.

Regards,

Subramanya

Hi Kemal,

Thanks. But data is not writing anything i need to write 12345. How to write

U-Boot# eeprom write 0 0x50 0x82000000 0 0x4

EEPROM @0x50 write: addr 82000000 off 0000 count 4 ... done
U-Boot# eeprom read 0 0x50 0x82000000 0 0x10

EEPROM @0x50 read: addr 82000000 off 0000 count 16 ... done
U-Boot# md 0x82000000
82000000: ffaa5511 00000000 9ff746a9 9ffd32c4 .U.......F...2..
82000010: ffffffff ffffffff ffffffff ffffffff ................
82000020: 00000424 29282c02 46040502 8a2882a0 $....,()...F..(.
82000030: 85415204 220242aa 42444404 022b282a .RA..B.".DDB*(+.
82000040: 51d54114 80a2200a 4c4505d9 206a8888 .A.Q. ....EL..j
82000050: 42071901 a88aaaa0 10040151 22aa2808 ...B....Q....(."
82000060: 03511040 a2e20a8a 03505404 888200a8 @.Q......TP.....
82000070: 53815055 8290a2aa 34500003 0efa8288 UP.S......P4....
82000080: 51201110 80890aa8 04115440 82a0a022 .. Q....@T.."...
82000090: 51150028 2b8a8ba2 41a02515 2880a800 (..Q...+.%.A...(
820000a0: 90010e20 e202aa82 8100c020 ee882820 ....... ... (..
820000b0: 05000404 0200c2aa 7cc10404 882a22a0 ...........|."*.
820000c0: 71309050 008a88a0 84124444 aa068086 P.0q....DD......
820000d0: 90504041 22a222a2 05444351 82a82aa8 A@P.."."QCD..*..
820000e0: 00a05111 028a84aa 5540224c 2aa020a3 .Q......L"@U. .*
820000f0: 17141111 06aee280 41001501 88822a2a ...........A**..

Please let me know how to write.

Regards,

Subramanya

Hi Kemal,

It worked only for 4bytes, i tried to write for 8byte it is not happening.

U-Boot# mw 0x82000000 56789

U-Boot# eeprom write 0 0x50 0x82000000 0 0x8

U-Boot# eeprom read 0 0x50 0x82000000 0 0x8

U-Boot# md 0x82000000
82000000: 00056789 bbbbbbbb bbbbbbbb bbbbbbbb .g..............
82000010: aaaabbbb aaaaaaaa aaaaaaaa aaaaaaaa ................
82000020: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
82000030: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
82000040: 00000000 00000000 00000000 00000000 ................
82000050: 00000000 00000000 00000000 00000000 ................
82000060: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
82000070: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
82000080: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
82000090: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
820000a0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
820000b0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
820000c0: 00000000 00000000 00000000 00000000 ................
820000d0: 00000000 00000000 00000000 00000000 ................
820000e0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................
820000f0: bbbbbbbb bbbbbbbb bbbbbbbb bbbbbbbb ................

Please let me know how to write to 32bytes.

Also i have seen that whether eeprom will write maximum of 32bytes at one time?.

OR we can give any bytes to write and read in eeprom.

Regards,

Subramanya

Hello Subramanya,

If you are done with this thread, please close it by clicking on "This resolved my issue" button.

Thanks,
Kemal