www.pudn.com > SerialGPS.zip > WritePacketHeader.m

function WritePacketHeader(gps, id, sz) 
global pid_dle_byte 
 
% Three byte header: (DLE, id, size) 
fwrite(gps, pid_dle_byte); 
fwrite(gps, id); 
fwrite(gps, sz); 
if (pid_dle_byte == sz) 
    fwrite(gps, pid_dle_byte); 
end