"Thanks very much ,I had tried as you ,but it did'nt work.
At the end ,i pulled th tf card out ,and it can be connected to the computer,then I update a new firmware to it ,It works well,"
I had changed some code from Copter3.3.3, built it using "make px4-v2". After uploading it to a pixhawk using missionplanner, the pix can not connected to the computer by usb cabel ,it continuous restart after 2 or 3 seconds again and…