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117 lines
4.4 KiB
C++
117 lines
4.4 KiB
C++
/// @file
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/// @ingroup qs
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/// @brief Internal (package scope) QS/C++ interface.
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/// @cond
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///***************************************************************************
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/// Product: QEP/C++
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/// Last updated for version 5.5.0
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/// Last updated on 2015-09-23
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///
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/// Q u a n t u m L e a P s
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/// ---------------------------
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/// innovating embedded systems
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///
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/// Copyright (C) Quantum Leaps, LLC. All rights reserved.
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///
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/// This program is open source software: you can redistribute it and/or
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/// modify it under the terms of the GNU General Public License as published
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/// by 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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/// Alternatively, this program may be distributed and modified under the
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/// terms of Quantum Leaps commercial licenses, which expressly supersede
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/// the GNU General Public License and are specifically designed for
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/// licensees interested in retaining the proprietary status of their code.
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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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/// Contact information:
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/// http://www.state-machine.com
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/// mailto:info@state-machine.com
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///***************************************************************************
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/// @endcond
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#ifndef qs_pkg_h
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#define qs_pkg_h
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//! Internal QS macro to insert an un-escaped byte into the QS buffer
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#define QS_INSERT_BYTE(b_) \
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QS_PTR_AT_(buf_, head_) = (b_); \
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++head_; \
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if (head_ == end_) { \
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head_ = static_cast<QSCtr>(0); \
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}
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//! Internal QS macro to insert an escaped byte into the QS buffer
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#define QS_INSERT_ESC_BYTE(b_) \
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chksum_ += (b_); \
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if (((b_) != QS_FRAME) && ((b_) != QS_ESC)) { \
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QS_INSERT_BYTE(b_) \
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} \
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else { \
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QS_INSERT_BYTE(QS_ESC) \
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QS_INSERT_BYTE(static_cast<uint8_t>((b_) ^ QS_ESC_XOR)) \
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++priv_.used; \
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}
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//! Internal QS macro to increment the given pointer argument @a ptr_
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///
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/// @note Incrementing a pointer violates the MISRA-C 2004 Rule 17.4(req),
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/// pointer arithmetic other than array indexing. Encapsulating this violation
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/// in a macro allows to selectively suppress this specific deviation.
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#define QS_PTR_INC_(ptr_) (++(ptr_))
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//! Internal QS macro to cast enumerated QS record number to uint8_t
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///
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/// @note Casting from enum to unsigned char violates the MISRA-C++ 2008 rules
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/// 5-2-7, 5-2-8 and 5-2-9. Encapsulating this violation in a macro allows to
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/// selectively suppress this specific deviation.
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#define QS_REC_NUM_(enum_) (static_cast<uint_fast8_t>(enum_))
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#ifndef Q_ROM_BYTE
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//! Macro to access a byte allocated in ROM
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///
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/// Some compilers for Harvard-architecture MCUs, such as gcc for AVR, do
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/// not generate correct code for accessing data allocated in the program
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/// space (ROM). The workaround for such compilers is to explictly add
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/// assembly code to access each data element allocated in the program
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/// space. The macro Q_ROM_BYTE() retrieves a byte from the given ROM
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/// address.
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///
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/// The Q_ROM_BYTE() macro should be defined for the compilers that
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/// cannot handle correctly data allocated in ROM (such as the gcc).
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/// If the macro is left undefined, the default definition simply returns
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/// the argument and lets the compiler generate the correct code.
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#define Q_ROM_BYTE(x_) (x_)
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#endif
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namespace QP {
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/// @brief Frame character of the QS output protocol
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uint8_t const QS_FRAME = static_cast<uint8_t>(0x7E);
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/// @brief Escape character of the QS output protocol
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uint8_t const QS_ESC = static_cast<uint8_t>(0x7D);
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/// @brief Escape modifier of the QS output protocol
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///
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/// The escaped byte is XOR-ed with the escape modifier before it is inserted
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/// into the QS buffer.
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uint8_t const QS_ESC_XOR = static_cast<uint8_t>(0x20);
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/// @brief Escape character of the QS output protocol
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uint8_t const QS_GOOD_CHKSUM = static_cast<uint8_t>(0xFF);
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//! send the Target info (object sizes, build time-stamp, QP version)
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void QS_target_info_(uint8_t const isReset);
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} // namespace QP
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#endif // qs_pkg_h
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