default you buy this rf board is gpio mode for raspberry,for now you can change to
usb mode for win7 /ubuntu work with blue dv or mmdvmhost +mmdvm .ini file
upgrade usb fw need raspberry and login in ssh mode in pi-star system
working for USB mode :
sudo service mmdvmhost stop
sudo pkill MMDVMHost
cd /tmp
sudo rm gpio.bin
sudo wget http://www.taozhengbo.com/usb.bin
sudo chmod 664 usb.bin
sleep 2
sudo pkill MMDVMHost
sudo pkill mmdvmhost.service
sudo stm32flash -v -w usb.bin -g 0x0 -R -i 20,-21,21:-20,21 /dev/ttyAMA0
echo "Rebooting Pi"
sleep 30
sudo reboot
working for GPIO mode :
sudo service mmdvmhost stop
sudo pkill MMDVMHost
cd /tmp
sudo rm gpio.bin
sudo wget http://www.taozhengbo.com/gpio.bin
sudo chmod 664 gpio.bin
sleep 2
sudo pkill MMDVMHost
sudo pkill mmdvmhost.service
sudo stm32flash -v -w gpio.bin -g 0x0 -R -i 20,-21,21:-20,21 /dev/ttyAMA0
echo "Rebooting Pi"
sleep 30
sudo reboot