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Author Topic: unexpected Feroceon EICE version signature  (Read 3007 times)
tjoe
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« on: August 11, 2010, 09:55:16 PM »

I have bricked my sheevaplug and I am trying to bring it back to live,
so far I tried on two different computers linux and windows,
but I get the same error messages on both platform:
Quote
Error: 79 305 core.c:865 jtag_examine_chain_check(): JTAG communication failure: check connection, JTAG interface, target power etc.
Error: 80 305 core.c:1176 jtag_init_inner(): trying to validate configured JTAG chain anyway...
Error: 81 310 core.c:1071 jtag_validate_chain(): Could not validate JTAG scan chain, IR mismatch, scan returned 0x00. tap=feroceon.cpu pos=0 expected 0x1 got 0
Error: 87 320 feroceon.c:699 feroceon_examine(): unexpected Feroceon EICE version signature
Error: 108 552 feroceon.c:699 feroceon_examine(): unexpected Feroceon EICE version signature
Error: 139 6000 target.c:1945 target_wait_state(): timed out while waiting for target halted
  Error:  Burn process failed !
I have attached the full log to this post.

I would appreciate any clue on how to solve this.

Thanks



* runme_nand.txt (12.99 KB - downloaded 265 times.)
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guidol
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« Reply #1 on: August 12, 2010, 01:14:29 AM »

I would appreciate any clue on how to solve this.

Try the idea from
http://www.newit.co.uk/forum/index.php?topic=202.25;wap2

Code:
NewIT_Marcus:
Try changing the 2000 Hz setting to 500 Hz, in installer/uboot/openocd/config/interface/sheevaplug.cfg

Since the error appears on the JTAG connection, check whether both tty ports are recognised. (You know one works, since the serial connection is apparently working).
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tjoe
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« Reply #2 on: August 12, 2010, 03:07:59 AM »

Thanks, I have updated the sheevaplug.cfg and now I can get a bit further:
Quote
Error: 190 1002 core.c:921 jtag_examine_chain_check(): JTAG scan chain interrogation failed: all zeroes
Error: 191 1002 core.c:922 jtag_examine_chain_check(): Check JTAG interface, timings, target power, etc.
Error: 209 1418 core.c:921 jtag_examine_chain_check(): JTAG scan chain interrogation failed: all zeroes
Error: 210 1418 core.c:922 jtag_examine_chain_check(): Check JTAG interface, timings, target power, etc.
Error: 262 1427 feroceon.c:657 feroceon_examine(): unexpected Feroceon EICE version signature
Error: 293 6649 target.c:2119 target_wait_state(): timed out while waiting for target halted
  Error:  Burn process failed !

Does the JTAG scan chain interrogation failed: all zeroes message means that the plug is bricked
or does it means there is a problem with the JTAG interface ?

I am trying to use the sheevaplug-installer-v1.0 to unbrick the plug, is this the right method ?

* runme.log (26.36 KB - downloaded 149 times.)
« Last Edit: August 12, 2010, 03:09:32 AM by tjoe » Logged

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