49 lines
1.6 KiB
Dart
49 lines
1.6 KiB
Dart
import '../io_tool/io_manager.dart';
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import '../io_tool/io_tool.dart';
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import 'io_type.dart';
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abstract class IOData {
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List<int> messageDetail();
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}
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abstract class SenderProtocol extends IOData {
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CommandType? commandType; //指令类型
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final int header = 0XEF01EE02; //帧头 固定取值 0XEF01EE02，长度 4 字节
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final int ask = 0X01 ; // 包类型：0X01 表示请求包，0X11 表示应答包，长度 1 字节
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int? _commandIndex; //帧序号
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final int identifier = 0x22 ; // 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）
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List<int>? commandData = []; //数据域
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final int? tail = 0xFF; //帧尾
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SenderProtocol(this.commandType) {
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_commandIndex = IoManager().commandIndex;
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}
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//TODO:拼装数据
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List<int> packageData() {
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commandData = messageDetail();
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List<int> commandList = [];
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commandList.add(header); //帧头
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commandList.add(_commandIndex!); //帧序号
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commandList.addAll(intToInt8List(dataSourceLength()));
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int type = commandType!.typeValue;
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commandList.addAll(intToInt8List(type)); //指令类型
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commandList.addAll(commandData!); //数据域
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commandList.add(checkSum(commandList)); //校验和
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commandList.add(tail!); //帧尾
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//帧头
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// commandList.add(0xEF);
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// commandList.add(0x01);
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// commandList.add(0xEE);
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// commandList.add(0x02);
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return commandList;
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}
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//TODO:校验和
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int dataSourceLength() => commandData!.length;
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} |