I am sorry for a late , but lastly I had really lot other problems so no time at all for any "flash" work .
However I made few lines of code to made possible communicate sending to OSD from any external devices , so from Ardupilot also - anyway that was the base reason . HappyKillmore already wrote about it - but here detailed descryption of message format .
So we can deliver information to display on OSD at location x,y looks like that :
[leading character][text… Continue