2.3 Read Ultrasonic Time-of-Flight

After the TUSS44x0 registers have been updated, the system can now continuously run a time-of-flight command and extract the resulting measurement data from the VOUT, O3, and O4 pins to compute and convert time-of-flight to distance or speed-of-sound. The SPI Interface Status Bits can be reviewed between each time-of-flight measurement to determine if the driver block is behaving as expected. The TUSS44x0 can be updated dynamically, so if any of the device settings are changed between time-of-flight cycles, the MCU is able to do so.

Figure 5. Read Ultrasonic Time-of-Flight