-uint16_t track_current_samples[16] = { 0 };
-uint8_t track_current_head = 0;
-volatile uint16_t track_current_sum = 0;
-uint16_t overcurrent_limit = 8796;
-uint8_t overcurrent_sent = 0;
+static uint16_t track_current_samples[16] = { 0 };
+static uint8_t track_current_head = 0;
+static volatile uint16_t track_current_sum = 0;
+static uint16_t overcurrent_limit = 8796;
+static uint8_t overcurrent_sent = 0;