protected ReadE2Info HandleReadE2Frame(byte[] frame)
{
ReadE2Info info = new ReadE2Info(frame);
ReturnMessage returnCode = CheckFrame(info);
if (returnCode != ReturnMessage.Success)
{
info.ReturnValue = returnCode;
return(info);
}
if (frame[0] > 4)
{
Array.Copy(frame, 3, info.E2Data, 0, info.E2Data.Length); //拷贝返回的 EEPROM 中的数据
}
info.ReturnValue = ReturnMessage.Success;
return(info);
}
/// <summary>
/// 将指定地址开始的读写器内部EEPROM的数据读出。该起始地址必须
/// 小于0x80。从0x80地址开始是读写器密钥存储区，内容不能被读出。
/// </summary>
/// <param name="start">读操作的起始地址，必须小于0x80</param>
/// <param name="len">被读的数据长度（小于20个字节）</param>
/// <returns></returns>
public async Task <ReadE2Info> ReadE2Async(byte start, byte len)
{
byte[] frame = CreateReadE2Frame(start, len);
CommunicationReturnInfo cri = await com.SendAsync(frame);
if (cri.ReturnValue != ReturnMessage.Success)
{
ReadE2Info rei = new ReadE2Info();
rei.SendByte = frame;
rei.ReturnValue = cri.ReturnValue;
rei.ExceptionMessage = cri.ExceptionMessage;
return(rei);
}
ReadE2Info info = HandleReadE2Frame(cri.RecvByte);
info.SendByte = frame;
return(info);
}