mirror of https://github.com/rusefi/ChibiOS.git
176 lines
5.8 KiB
C
176 lines
5.8 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2019 Giovanni Di Sirio.
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This file is part of ChibiOS.
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ChibiOS 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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ChibiOS 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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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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/**
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* @file seregs.h
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* @brief Safety Extensions Registers module macros and structures.
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*
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* @addtogroup SEREGS
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* @{
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*/
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#ifndef SEREGS_H
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#define SEREGS_H
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/*===========================================================================*/
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/* Module constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module pre-compile time settings. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module data structures and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module macros. */
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/*===========================================================================*/
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/**
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* @name Function variants
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* @{
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*/
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#define seRegSet8X(p, s, v) seRegModify8X(p, s, (uint8_t)0, v)
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#define seRegSet16X(p, s, v) seRegModify16X(p, s, (uint16_t)0, v)
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#define seRegSet32X(p, s, v) seRegModify32X(p, s, (uint32_t)0, v)
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#define seRegClear8X(p, c, v) seRegModify8X(p, (uint8_t)0, c, v)
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#define seRegClear16X(p, c, v) seRegModify16X(p, (uint16_t)0, c, v)
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#define seRegClear32X(p, c, v) seRegModify32X(p, (uint32_t)0, c, v)
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/** @} */
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef __cplusplus
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}
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#endif
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/*===========================================================================*/
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/* Module inline functions. */
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/*===========================================================================*/
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/**
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* @brief Modifies a 8 bits register.
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* @note This code relies on compiler optimizations, the constant
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* operations that cause no change to the final value are
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* optimized out.
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*
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* @param[in] p address of the register
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* @param[in] setmask mask of bits to be set
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* @param[in] clrmask mask of bits to be cleared
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* @param[in] verify comparison flag
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* @return The check result.
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* @retval false if the comparison succeeded.
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* @retval true if the comparison failed.
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*
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* @xclass
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*/
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static inline bool seRegModify8X(volatile uint8_t *p,
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uint8_t setmask,
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uint8_t clrmask,
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bool verify) {
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uint8_t v = *p;
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v |= setmask;
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v &= ~clrmask;
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*p = v;
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if (verify) {
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return (*p & (uint8_t)(setmask | clrmask)) != setmask;
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}
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return false;
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}
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/**
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* @brief Modifies a 16 bits register.
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* @note This code relies on compiler optimizations, the constant
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* operations that cause no change to the final value are
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* optimized out.
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*
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* @param[in] p address of the register
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* @param[in] setmask mask of bits to be set
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* @param[in] clrmask mask of bits to be cleared
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* @param[in] verify comparison flag
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* @return The check result.
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* @retval false if the comparison succeeded.
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* @retval true if the comparison failed.
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*
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* @xclass
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*/
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static inline bool seRegModify16X(volatile uint16_t *p,
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uint16_t setmask,
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uint16_t clrmask,
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bool verify) {
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uint16_t v = *p;
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v |= setmask;
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v &= ~clrmask;
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*p = v;
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if (verify) {
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return (*p & (uint16_t)(setmask | clrmask)) != setmask;
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}
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return false;
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}
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/**
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* @brief Modifies a 32 bits register.
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* @note This code relies on compiler optimizations, the constant
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* operations that cause no change to the final value are
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* optimized out.
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*
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* @param[in] p address of the register
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* @param[in] setmask mask of bits to be set
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* @param[in] clrmask mask of bits to be cleared
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* @param[in] verify comparison flag
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* @return The check result.
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* @retval false if the comparison succeeded.
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* @retval true if the comparison failed.
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*
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* @xclass
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*/
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static inline bool seRegModify32X(volatile uint32_t *p,
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uint32_t setmask,
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uint32_t clrmask,
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bool verify) {
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uint32_t v = *p;
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v |= setmask;
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v &= ~clrmask;
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*p = v;
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if (verify) {
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return (*p & (uint32_t)(setmask | clrmask)) != setmask;
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}
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return false;
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}
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#endif /* SEREGS_H */
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/** @} */
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