mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-14 20:18:13 +00:00
120 lines
3.0 KiB
C++
120 lines
3.0 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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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, or (at your option)
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __JTAG_H__
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#define __JTAG_H__
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#include "jtag_target.hpp"
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#include <cstdint>
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#include <cstddef>
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#include <bitset>
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namespace jtag {
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class JTAG {
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public:
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constexpr JTAG(
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Target& target)
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: target(target) {
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}
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void reset() {
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/* ??? -> Test-Logic-Reset */
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for (size_t i = 0; i < 8; i++) {
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target.clock(1, 0);
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}
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}
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void run_test_idle() {
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/* Test-Logic-Reset -> Run-Test/Idle */
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target.clock(0, 0);
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}
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void runtest_tck(const size_t count) {
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target.delay(count);
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}
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uint32_t shift_ir(const size_t count, const uint32_t value) {
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/* Run-Test/Idle -> Select-DR-Scan -> Select-IR-Scan */
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target.clock(1, 0);
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target.clock(1, 0);
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/* Scan -> Capture -> Shift */
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target.clock(0, 0);
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target.clock(0, 0);
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const auto result = shift(count, value);
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/* Exit1 -> Update */
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target.clock(1, 0);
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/* Update -> Run-Test/Idle */
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target.clock(0, 0);
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return result;
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}
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uint32_t shift_dr(const size_t count, const uint32_t value) {
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/* Run-Test/Idle -> Select-DR-Scan */
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target.clock(1, 0);
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/* Scan -> Capture -> Shift */
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target.clock(0, 0);
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target.clock(0, 0);
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const auto result = shift(count, value);
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/* Exit1 -> Update */
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target.clock(1, 0);
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/* Update -> Run-Test/Idle */
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target.clock(0, 0);
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return result;
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}
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uint32_t shift_dr(const size_t count, const uint32_t address, const uint32_t value) {
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/* Run-Test/Idle -> Select-DR-Scan */
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target.clock(1, 0);
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/* Scan -> Capture -> Shift */
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target.clock(0, 0);
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target.clock(0, 0);
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shift_header(count, address);
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const auto result = shift(count, value);
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/* Exit1 -> Update */
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target.clock(1, 0);
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/* Update -> Run-Test/Idle */
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target.clock(0, 0);
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return result;
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}
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private:
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Target& target;
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uint32_t shift(const size_t count, uint32_t value);
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uint32_t shift_header(const size_t count, uint32_t value);
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};
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} /* namespace jtag */
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#endif /*__JTAG_H__*/
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