(window.webpackJsonp=window.webpackJsonp||[]).push([[263],{581:function(t,e,a){"use strict";a.r(e);var l=a(10),_=Object(l.a)({},(function(){var t=this,e=t._self._c;return e("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[e("h1",{attrs:{id:"nmea-2000"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#nmea-2000"}},[t._v("#")]),t._v(" NMEA 2000")]),t._v(" "),e("p",[e("strong",[t._v("FDI_NMEA 2000 接口用户使用手册")])]),t._v(" "),e("fdi-img",{attrs:{width:"80%",alt:"NMEA 2000 接口",src:"/developers/03-fdilinksdk/NMEA 2000/图片26.png",caption:""}}),t._v(" "),e("h2",{attrs:{id:"_1-简介"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#_1-简介"}},[t._v("#")]),t._v(" 1. 简介")]),t._v(" "),e("p",[t._v("NMEA 2000 是用于船舶与航海设备间数据通信的标准化接口协议，经串行网络传输位置、速度、状态等信息，广泛应用于船舶电子设备互联与数据共享。")]),t._v(" "),e("p",[t._v("FDISYSTEMS 产品兼容国际 NMEA 2000 协议，可与各类 NMEA 2000 设备互通，便于集成到船舶与海洋应用中，提供可靠、高效的数据通信。")]),t._v(" "),e("fdi-img",{attrs:{width:"100%",alt:"NMEA 2000 应用示意",src:"/developers/03-fdilinksdk/NMEA 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扩展帧")]),t._v("。除 PGN 外，CAN 帧头还包含设备源地址、目标地址与优先级等信息。")]),t._v(" "),e("h3",{attrs:{id:"_3-nmea-2000-与-can-通信的关系"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#_3-nmea-2000-与-can-通信的关系"}},[t._v("#")]),t._v(" (3) NMEA 2000 与 CAN 通信的关系")]),t._v(" "),e("p",[t._v("NMEA 2000 是基于 CAN 电气与硬件基础的高层软件协议，规定了基于 CAN 帧头与数据帧的编码与交换格式。")]),t._v(" "),e("h3",{attrs:{id:"_4-什么是多帧快速包发送方式"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#_4-什么是多帧快速包发送方式"}},[t._v("#")]),t._v(" (4) 什么是多帧快速包发送方式？")]),t._v(" "),e("p",[t._v("当有效载荷总长度超过 8 字节时，需按多帧快速包格式在 CAN 总线上安全、连续地发送。格式示意如下：")]),t._v(" "),e("table",[e("thead",[e("tr",[e("th",{staticStyle:{"text-align":"left"}},[t._v("帧")]),t._v(" "),e("th",{staticStyle:{"text-align":"center"}},[t._v("Byte[0]（序号）")]),t._v(" "),e("th",{staticStyle:{"text-align":"left"}},[t._v("其余字节")])])]),t._v(" "),e("tbody",[e("tr",[e("td",{staticStyle:{"text-align":"left"}},[t._v("Packet_1")]),t._v(" "),e("td",{staticStyle:{"text-align":"center"}},[t._v("0")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Byte[1]=有效数据长度（示例为 28）；Byte[2]～Byte[8]=Data[1]～Data[7]")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"left"}},[t._v("Packet_2")]),t._v(" "),e("td",{staticStyle:{"text-align":"center"}},[t._v("1")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Data[8]～Data[15]")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"left"}},[t._v("Packet_3")]),t._v(" "),e("td",{staticStyle:{"text-align":"center"}},[t._v("2")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Data[16]～Data[24]")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"left"}},[t._v("Packet_4")]),t._v(" "),e("td",{staticStyle:{"text-align":"center"}},[t._v("3")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Data[25]～Data[28]；不足字节填 "),e("code",[t._v("0xFF")])])])])]),t._v(" "),e("p",[t._v("说明：")]),t._v(" "),e("ol",[e("li",[t._v("首帧 "),e("code",[t._v("Byte[1]")]),t._v(" 为实际有效数据字节长度。")]),t._v(" "),e("li",[t._v("各帧 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