....we were doing fine at getting readings from the VEX SONAR sensor until the robot brain crashed and the robot crashed into a wall--we had aluminum extensions fixed to the front of the robot as bumper protection, but as the result of a freak accident they managed to slide between the partitions of the wall and failed to work. After spending about 15 minutes or so troubleshooting our software and hardware for faults, we determined that the VEX CPU had simply crashed for unexplainable reasons, as it wasn't responding to any changes in the software and RobotC debugger began posting static values for all pids.
When the brain was finally rebooted, the SONAR sensor appeared to have suffered a critical failure, thought possibly due to physical damage as a result of the robot running into the wall at full speed. However, we soon realized that the CPU was posting a static value of "16" (inches interpreted) even without the SONAR sensor plugged in.
So...it remains to be determined exactly what has happened and whether the situation is permanent or can be rectified.
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