APM's light was blinking when gps locked?

[surfingbboy]

I have followed and been interested in ardurover for a long time. But recently it drived me crazy that when GPS lock, the light A and C on APM always blinking . it seemed that some loop failed, and jump to entry point to initialize in setup() loop. I wonder if you have same problem like me, cuz i have no idea to solve it.

Any help would be appreciated.

terminal output message:

initializing debug line initializing gps initializing baro initializing compass initializing imu initializing ins setup completed initializing car controller initializing autopilot free ram: 3043 bytes initializing radio Init Gyro*****Init Accel***** ground pressure: 1204098557 ground temperature: 26214 G MTK1.6 OK

home before load lat: 22.995337 deg, lon: 120.223340 deg, cmd: 16

home after load lat: 22.995337 deg, lon: 120.223340 deg, cmd: 16 index ctor ++ index: 0 key: 200 ++ index ctor ++ index: 0 key: 200 ++ attaching loops running initializing debug line initializing gps initializing baro initializing compass initializing imu initializing ins setup completed initializing car controller initializing autopilot free ram: 3043 bytes initializing radio Init Gyro*****Init Accel***** ground pressure: 1204105344 ground temperature: 0 G MTK1.6 OK . . . . .