static volatile uint8_t opp_age = 0;
static volatile int16_t opp_a = I2C_OPPONENT_NOT_THERE;
static volatile int16_t opp_d = I2C_OPPONENT_NOT_THERE;
static volatile uint8_t opp_age = 0;
static volatile int16_t opp_a = I2C_OPPONENT_NOT_THERE;
static volatile int16_t opp_d = I2C_OPPONENT_NOT_THERE;