7556a93aed
XSVF improvements: - Layer parts of XSVF directly over SVF, calling svf_add_statemove() instead of expecting jtag_add_statemove() to conform to the SVF/XSVF requirements (which it doesn't). This should improve XSTATE handling a lot; it removes most users of jtag_add_statemove(), and the comments about how it should really do what svf_add_statemove() does. - Update XSTATE logic to be a closer match to the XSVF spec. The main open issue here is (still) that this implementation doesn't know how to build and submit paths from single-state transitions ... but now it will report that error case. - Update the User's Guide to mention the two utility scripts for working with XSVF, and to mention the five extension opcodes. Handling of state transition paths is, overall, still a mess. I think they should all be specified as paths not unlike SVF uses, and compiled to the bitstrings later ... so that we can actually make sense of the paths. (And see the extra clocks, detours through RUN, etc.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
49 lines
2.3 KiB
C
49 lines
2.3 KiB
C
/***************************************************************************
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* Copyright (C) 2009 by Simon Qian *
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* SimonQian@SimonQian.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifndef SVF_H
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#define SVF_H
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#include "command.h"
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extern int svf_register_commands(struct command_context_s *cmd_ctx);
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/**
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* svf_add_statemove() moves from the current state to @a goal_state.
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*
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* @param goal_state The final TAP state.
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* @return ERROR_OK on success, or an error code on failure.
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*
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* The current and goal states must satisfy svf_tap_state_is_stable().
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* State transition paths used by this routine are those given in the
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* SVF specification for single-argument STATE commands (and also used
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* for various other state transitions).
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*/
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extern int svf_add_statemove(tap_state_t goal_state);
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/**
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* svf_tap_state_is_stable() returns true for stable non-SHIFT states
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*
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* @param state The TAP state in question
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* @return true iff the state is stable and not a SHIFT state.
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*/
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extern bool svf_tap_state_is_stable(tap_state_t state);
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#endif /* SVF_H */
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