Data communication method, communication frame generating method, and medium on which program for carrying out the methods are recorded

A recording medium on which a program executed in a communication device in an asynchronous communication system and for generating a communication frame used in communication is recorded, the program being computer-readable and for realizing on the communication device an operational environment comprising:

• generating a start flag indicating the beginning of the communication frame and an end flag indicating the end of the communication frame;
• generating particular information stored between the start flag and the end flag by converting only a code identical to the flag codes of the start or end flags, which is included in information which the communication device can arbitrarily set in the particular information, to a code different from the flag codes;
• and
• forming the communication frame based on the start flag, the end flag and the particular information.

A communication frame generating method for generating a communication frame used for communication in a communication device in an asynchronous communication system, said method comprising:

• generating a start flag indicating the beginning of the communication frame and an end flag indicating the end of the communication frame;
• generating particular information stored between the start flag and the end flag in such a way that information which the communication device can arbitrarily set in the particular information does not contain any code identical to the flag codes of the start or end flags;
• and
• forming the communication frame based on the start flag, the end flag and the particular information.

A recording medium on which a program executed in a communication device in an asynchronous communication system and for generating a communication frame used in communication is recorded, the program being computer-readable and for realizing on the communication device an operational environment comprising:

• generating a start flag indicating the beginning of the communication frame and an end flag indicating the end of the communication frame;
• generating particular information stored between the start flag and the end flag in such a way that information which the communication device can arbitrarily set in the particular information does not contain any code identical to the flag codes of the start or end flags;
• and
• forming the communication frame on the basis of the start flag, the end flag, and the particular information.