TrainCamp_zhangyongpan_Modbus/ModbusDemo/Uitls/CheckData.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using ModbusDemo.ErrorCode;
namespace ModbusDemo.Uitls
{
    public static class CheckData
    {
        /// <summary>
        /// 检测返回的数据格式是否正确
        /// </summary>
        /// <param name="response"></param>
        /// <returns></returns>
        public static bool CheckResponse(byte[] response)
        {
            if (response == null || response.Length == 0)
            {
                MessageBox.Show("返回数据为空", "error", MessageBoxButton.OK, MessageBoxImage.Error);
                return false;
            }
            // 检查数组长度是否足够
            if (response.Length > 1)
            {
                byte secondByte = response[1]; // 获取第二个字节（索引为1）

                // 使用掩码0xF0获取高4位，并右移4位
                int highNibble = (secondByte & 0xF0) >> 4;

                // 判断高4位是否等于8
                if (highNibble == 8)
                {
                    var error = ErrorCode.ErrorCode.FromByte(response[2]);
                    
                    MessageBox.Show(error.ToString());
                    return false;
                }
            }
            

            if (!CRCUitl.ValidateCRC(response))
            {
                MessageBox.Show(ErrorCode.ErrorCode.CrcCheckError.ToString());
                return false;
            }

            return true;
        }
          
    }
}