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jtag: add '-ignore-version' option

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Add a "-ignore-version" to "jtag newtap" which makes the IDCODE
comparison logic optionally ignore version differences.

Update the "scan_chain" command to illustrate this by showing
the "*" character instead of the (ignored) version nibble.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell
2009-12-14 15:55:51 -08:00
parent 6f929dbd93
commit af79925eb1
4 changed files with 44 additions and 6 deletions
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doc/openocd.texi
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@@ -2763,6 +2763,12 @@ are provided in vendors' chip documentation, usually a technical
reference manual. Sometimes you may need to probe the JTAG
hardware to find these values.
@xref{Autoprobing}.
@item @code{-ignore-version}
@*Specify this to ignore the JTAG version field in the @code{-expected-id}
option. When vendors put out multiple versions of a chip, or use the same
JTAG-level ID for several largely-compatible chips, it may be more practical
to ignore the version field than to update config files to handle all of
the various chip IDs.
@item @code{-ircapture} @var{NUMBER}
@*The bit pattern loaded by the TAP into the JTAG shift register
on entry to the @sc{ircapture} state, such as 0x01.