44 lines
997 B
C
44 lines
997 B
C
/*
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* Copyright (c) 2018 Karsten Koenig
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file Header where utility code can be found for CAN drivers
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*/
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#ifndef ZEPHYR_DRIVERS_CAN_CAN_UTILS_H_
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#define ZEPHYR_DRIVERS_CAN_CAN_UTILS_H_
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/**
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* @brief Check if a CAN filter matches a CAN frame
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*
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* @param frame CAN frame.
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* @param filter CAN filter.
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* @return true if the CAN filter matches the CAN frame, false otherwise
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*/
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static inline bool can_utils_filter_match(const struct can_frame *frame,
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struct can_filter *filter)
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{
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if (((frame->flags & CAN_FRAME_IDE) != 0) && ((filter->flags & CAN_FILTER_IDE) == 0)) {
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return false;
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}
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if (((frame->flags & CAN_FRAME_RTR) == 0) && (filter->flags & CAN_FILTER_DATA) == 0) {
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return false;
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}
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if (((frame->flags & CAN_FRAME_RTR) != 0) && (filter->flags & CAN_FILTER_RTR) == 0) {
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return false;
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}
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if ((frame->id ^ filter->id) & filter->mask) {
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return false;
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}
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return true;
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}
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#endif /* ZEPHYR_DRIVERS_CAN_CAN_UTILS_H_ */
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