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| author | David Brownell <dbrownell@users.sourceforge.net> | 2009-10-19 22:50:51 -0700 |
|---|---|---|
| committer | David Brownell <dbrownell@users.sourceforge.net> | 2009-10-19 22:50:51 -0700 |
| commit | d243e641d3169674082f3cdae2d9a7242b96f2c2 (patch) | |
| tree | 716365f00a5ea1565ae1dfcce67e0e25a2ad00ef /src | |
| parent | 3cc147efd95502bd4d873596b60c3c6d8e92ab71 (diff) | |
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jtag_add_statemove() always uses TLR to get to RESET
As decided a while back, this isn't a transition we want to chance.
Whenever someone wants to got to RESET, force it.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Diffstat (limited to 'src')
| -rw-r--r-- | src/jtag/core.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/jtag/core.c b/src/jtag/core.c index 415d1e82..7c85839b 100644 --- a/src/jtag/core.c +++ b/src/jtag/core.c @@ -567,12 +567,14 @@ int jtag_add_statemove(tap_state_t goal_state) tap_state_name(goal_state)); - if (goal_state == cur_state) - ; /* nothing to do */ - else if (goal_state == TAP_RESET) - { + /* If goal is RESET, be paranoid and force that that transition + * (e.g. five TCK cycles, TMS high). Else trust "cur_state". + */ + if (goal_state == TAP_RESET) jtag_add_tlr(); - } + else if (goal_state == cur_state) + /* nothing to do */ ; + else if (tap_is_state_stable(cur_state) && tap_is_state_stable(goal_state)) { unsigned tms_bits = tap_get_tms_path(cur_state, goal_state); |