- int16_t accel_along_up, accel_along_down;
- int16_t accel_across_up, accel_across_down;
- int16_t accel_through_up, accel_through_down;
+ int16_t accel_along_up = 0, accel_along_down = 0;
+ int16_t accel_across_up = 0, accel_across_down = 0;
+ int16_t accel_through_up = 0, accel_through_down = 0;