app-starlock/star_lock/lib/blue/io_sender.dart

import 'dart:typed_data';

import 'io_tool/io_manager.dart';
import 'io_tool/io_tool.dart';
import 'io_type.dart';

abstract class IOData {
  List<int> messageDetail();
}

abstract class SenderProtocol extends IOData {
  // var uint8View1 = Uint8List(300);

  CommandType? commandType; //指令类型
  final List<int> header = [0XEF, 0X01, 0XEE, 0X02]; //帧头 固定取值 0XEF01EE02，长度 4 字节
  final int ask = 0X01 ; //  包类型：0X01 表示请求包，0X11 表示应答包，长度 1 字节
  int? _commandIndex = 1; //包序号

  int identifier = 0x20; //  高 4 位表示包版本，低 4 位用来指示后面数据的加密类型，长度为 1 字节，加密类型取值说明，0：明文，1：AES128，2：SM4（事先约定密钥），3：SM4（设备指定密钥）

  List<int>? commandData = []; //数据块
  // final int? tail = 0xFF; //用来校验包的完整性，采用 CRC 校验方法，长度为 2 个字节

  SenderProtocol(this.commandType) {
    _commandIndex = IoManager().commandIndex;
  }

  //TODO:拼装数据
  List<int> packageData() {
    commandData = messageDetail();
    List<int> commandList = [];

    // 帧头
    commandList.addAll(header);
    // print("header:$header");

    //包类型
    commandList.add(ask); //包类型
    // print("ask:$ask");

    // 包序号
    int commandIndexChange = _commandIndex!;
    double commandIndexChangeDouble = commandIndexChange/256;
    int commandIndexChang1 = commandIndexChangeDouble.toInt();
    int commandIndexChang2 = commandIndexChange%256;
    commandList.add(commandIndexChang1);
    commandList.add(commandIndexChang2);
    // print("_commandIndex:$_commandIndex commandIndexChang1$commandIndexChang1 commandIndexChang2:$commandIndexChang2");

    // 包标识
    // 指令类型 高 4 位表示包版本，低 4 位用来指示后面数据的加密类型，长度为 1 字节，加密类型取值说明，0：明文，1：AES128，2：SM4（事先约定密钥），3：SM4（设备指定密钥）
    commandList.add(commandType!.identifierValue);
    // print("commandType!.identifierValue:${commandType!.identifierValue}");

    // 数据长度
    int dataLen = dataSourceLength();
    // commandList.add(dataLength);
    // print("dataLen:$dataLen");
    // var dataLen = 42;
    double dataLength = dataLen/256;
    commandList.add(dataLength.toInt());
    commandList.add(dataLen%256);
    commandList.add(dataLength.toInt());
    commandList.add(dataLen%256);

    // 数据块
    commandList.addAll(commandData!); //数据块
    // print("commandData:$commandData");

    // 校验位
    var mcrc = crc_16(commandList);
    double mcrcDouble = mcrc/256;
    int mcrcDouble1 = mcrcDouble.toInt();
    int mcrcDouble2 = mcrc%256;
    commandList.add(mcrcDouble1); //帧尾
    commandList.add(mcrcDouble2);
    // print("mcrc:$mcrc");
    // print("mcrcDouble1:$mcrcDouble1");
    // print("mcrcDouble2:$mcrcDouble2");
    return commandList;
  }

  //TODO:长度
  int dataSourceLength() => commandData!.length;

  var crcTable =[
    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
    0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
    0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
    0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
    0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
    0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
    0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
    0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
    0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
    0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
    0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
    0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
    0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
    0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
    0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
    0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0];

  int crc_16(buffer) {
    var len = buffer.length;
    var value_ = 0x0000;//0xa635; //初始值，根据CRC类型设定
    var tmp;
    for (var i = 0; i < buffer.length; i++)
    {
      tmp = reverse8(buffer[i]);
      value_ = ((value_ << 8) ^ crcTable[((value_ >> 8) ^ tmp) & 0xFF]) & 0xFFFF;
    }
    value_ = reverse16(value_);
    return value_;
  }

  int reverse8(data) {
    var i;
    var temp=0;
    for(i=0;i<8;i++) {
      //字节反转
      temp |= ((data>>i) & 0x01)<<(7-i);
    }
    return temp;
  }

  int reverse16(data) {
    var i;
    var temp=0;
    for(i=0;i<16;i++) {
      //反转
      temp |= ((data>>i) & 0x0001)<<(15-i);
    }
    return temp;
  }

}