joy2key
joy2key for rg351v's dos games
git clone https://github.com/guangmingwan/joy2key-RG351V
make
make upload
then modify /emuelec/scripts/emuelecRunEmu.sh
. /etc/profile
#add tow line
killall joy2key
/storage/joy2key
now,you can play dos game use joystick,;-)