118 lines
2.1 KiB
C
118 lines
2.1 KiB
C
/*
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* Copyright (c) 2018 Intel Corporation.
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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
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* @brief Public functions for the Precision Time Protocol time specification.
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*
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*/
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#ifndef ZEPHYR_INCLUDE_NET_PTP_TIME_H_
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#define ZEPHYR_INCLUDE_NET_PTP_TIME_H_
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/**
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* @brief Precision Time Protocol time specification
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* @defgroup ptp_time PTP time
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* @ingroup networking
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* @{
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*/
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#include <net/net_core.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Precision Time Protocol Timestamp format.
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*
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* This structure represents a timestamp according
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* to the Precision Time Protocol standard.
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*
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* Seconds are encoded as a 48 bits unsigned integer.
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* Nanoseconds are encoded as a 32 bits unsigned integer.
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*/
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struct net_ptp_time {
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/** Seconds encoded on 48 bits. */
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union {
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struct {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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u32_t low;
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u16_t high;
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u16_t unused;
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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u16_t unused;
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u16_t high;
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u32_t low;
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#else
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#error "Unknown byte order"
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#endif
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} _sec;
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u64_t second;
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};
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/** Nanoseconds. */
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u32_t nanosecond;
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};
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#ifdef __cplusplus
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}
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#endif
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/**
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* @brief Precision Time Protocol Extended Timestamp format.
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*
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* This structure represents an extended timestamp according
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* to the Precision Time Protocol standard.
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*
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* Seconds are encoded as 48 bits unsigned integer.
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* Fractional nanoseconds are encoded as 48 bits, their unit
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* is 2*(-16) ns.
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*/
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struct net_ptp_extended_time {
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/** Seconds encoded on 48 bits. */
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union {
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struct {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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u32_t low;
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u16_t high;
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u16_t unused;
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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u16_t unused;
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u16_t high;
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u32_t low;
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#else
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#error "Unknown byte order"
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#endif
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} _sec;
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u64_t second;
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};
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/** Fractional nanoseconds on 48 bits. */
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union {
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struct {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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u32_t low;
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u16_t high;
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u16_t unused;
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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u16_t unused;
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u16_t high;
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u32_t low;
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#else
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#error "Unknown byte order"
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#endif
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} _fns;
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u64_t fract_nsecond;
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};
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} __packed;
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/**
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* @}
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*/
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#endif /* ZEPHYR_INCLUDE_NET_PTP_TIME_H_ */
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