4d4813de87
All source files include general.h first and before anything else. This inlcludes platform.h and platform_support.h No header file needs to include to include any of these, but should include any others needed for it's own declarations.
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/*
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* This file is part of the Black Magic Debug project.
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*
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* Copyright (C) 2011 Black Sphere Technologies Ltd.
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* Written by Gareth McMullin <gareth@blacksphere.co.nz>
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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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __JTAGTAP_H
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#define __JTAGTAP_H
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/* Note: Signal names are as for the device under test. */
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int jtagtap_init(void);
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void jtagtap_reset(void);
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void jtagtap_srst(bool assert);
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uint8_t jtagtap_next(const uint8_t TMS, const uint8_t TDI);
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/* tap_next executes one state transision in the JTAG TAP state machine:
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* - Ensure TCK is low
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* - Assert the values of TMS and TDI
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* - Assert TCK (TMS and TDO are latched on rising edge
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* - Caputure the value on TDO
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* - Release TCK.
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*/
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void jtagtap_tms_seq(uint32_t MS, int ticks);
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void jtagtap_tdi_tdo_seq(uint8_t *DO, const uint8_t final_tms, const uint8_t *DI, int ticks);
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void jtagtap_tdi_seq(const uint8_t final_tms, const uint8_t *DI, int ticks);
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/* Shift out a sequence on MS and DI, capture data to DO.
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* - This is not endian safe: First byte will always be first shifted out.
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* - DO may be NULL to ignore captured data.
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* - DO may be point to the same address as DI.
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*/
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/* generic soft reset: 1, 1, 1, 1, 1, 0 */
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#define jtagtap_soft_reset() \
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jtagtap_tms_seq(0x1F, 6)
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/* Goto Shift-IR: 1, 1, 0, 0 */
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#define jtagtap_shift_ir() \
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jtagtap_tms_seq(0x03, 4)
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/* Goto Shift-DR: 1, 0, 0 */
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#define jtagtap_shift_dr() \
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jtagtap_tms_seq(0x01, 3)
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/* Goto Run-test/Idle: 1, 1, 0 */
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#define jtagtap_return_idle() \
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jtagtap_tms_seq(0x01, 2)
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#endif
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