34 lines
1013 B
C
34 lines
1013 B
C
#ifndef TIME_SYNC_PROTOCOL_H__
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#define TIME_SYNC_PROTOCOL_H__
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#include <stdint.h>
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#include <zephyr/sys/util.h>
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/*
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* 统一定义时间同步协议帧格式，方便 BLE/USB 两条链路共享：
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*
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* byte 0 : version
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* byte 1 : flags
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* byte 2-3 : timezone_min (little-endian, int16)
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* byte 4-11: utc_ms (little-endian, uint64)
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* byte 12-15: accuracy_ms (little-endian, uint32)
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*/
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#define TIME_SYNC_PROTOCOL_VERSION 1U
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#define TIME_SYNC_PROTOCOL_PAYLOAD_SIZE 16U
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#define TIME_SYNC_PROTOCOL_OFFSET_VERSION 0U
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#define TIME_SYNC_PROTOCOL_OFFSET_FLAGS 1U
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#define TIME_SYNC_PROTOCOL_OFFSET_TIMEZONE 2U
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#define TIME_SYNC_PROTOCOL_OFFSET_UTC_MS 4U
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#define TIME_SYNC_PROTOCOL_OFFSET_ACCURACY_MS 12U
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/*
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* 预留 flags 字段：
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* - 当前版本只要求时区字段有效；
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* - 后续如果要加 DST、闰秒或来源质量扩展，可以继续复用这个字节。
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*/
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#define TIME_SYNC_PROTOCOL_FLAG_TIMEZONE_VALID BIT(0)
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#endif /* TIME_SYNC_PROTOCOL_H__ */
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