void ltc_decode_frame(){
  uint8_t nums[8];
  nums[0] = rptr[7] & 0b00000011; // Hours tens
  nums[1] = rptr[6] & 0b00001111; // Hours units
  nums[2] = rptr[5] & 0b00000111; // Minutes tens
  nums[3] = rptr[4] & 0b00001111; // Minutes units
  nums[4] = (rptr[3] & 0b00000111); // Seconds tens
  nums[5] = (rptr[2] & 0b00001111); // Seconds units
  nums[6] = (rptr[1] & 0b00000011); // Frames tens
  nums[7] = (rptr[0] & 0b00001111); // Frames units
  display_show(nums);
}