/** * Cricket v2 Ultrasound Control interface. * @author David Moore */interface UltrasoundControl{    async command result_t StartDetector(uint16_t timeout);    async command result_t StopDetector();    async event result_t PulseDetected(uint16_t time);    async event result_t DetectorTimeout();    command result_t SetGain(uint8_t val);    async command result_t SendPulse();}