HI all iam working cygnal microcontrollers .From the console iam sending text file to the controller through uart transmission.The data in the text file is written into controller external memory. lets take an example the text file contains the below data 1111111111111111ffffffffff now i want to add 0203 to the above data that means i have to get in this format 020311111111111111110203ffffffffff0203 that means after every 8 bytes i have to add 0203 in the text file the 0203 values the user will enter as message overheads kindly provide me how to implement this regards john e