Asynchronous data multiplexing method and device

An asynchronous data multiplexing method, comprising the following steps:

• acquiring status flag, serial number, and data information of each branch data;
• the status flag at least comprising valid identification information and invalid identification information;
• performing asynchronous data buffering processing on the data information of each branch data according to preset channel transmission bit-serial number to obtain buffered data of each branch;
• performing polling detection on each branch data according to the serial number, and selecting the status flag according to a detection result;
• then determining each branch data according to the status flag, performing multiplexing processing on each branch data according to a determination result to generate a data frame, and the data frame at least comprising a frame header and a data part;
• wherein if the status flag is the valid identification information, a flag bit corresponding to the frame header is set according to the valid identification information, and the buffered data of current branch data is added to a corresponding position of the data part in a bitwise manner;
• and
• wherein if the status flag is the invalid identification information, the flag bit corresponding to the frame header is kept unchanged.