applications: gesture_recognition: use BMI270 FIFO batch mode#67
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applications: gesture_recognition: use BMI270 FIFO batch mode#67
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Switch IMU sampling from per-sample timer polling to FIFO watermark streaming (sensor_stream / RTIO) when CONFIG_IMU_FIFO_BATCH is set. The SoC sleeps while the BMI270 fills its FIFO and wakes only every 33 samples at 100 Hz, reducing CPU wake-ups by ~33x. - Add IMU_FIFO_BATCH Kconfig. - imu.c: RTIO streaming thread, decoder-based Q31-to-float conversion, and ring buffer for batch handoff to main loop. Shared sensor_attr_set calls extracted to imu_configure_sensor(). - main.c: refactor sample processing into process_ready_imu_samples() to drain the ring buffer each wake; semaphore changed to K_SEM_MAX_LIMIT so no watermark events are lost. - DT overlays (LM20A, LM20B): add stream0 alias, irq-gpios, gpio1. - prj.conf (all LM20A/LM20B variants + Thingy53): enable BMI270 FIFO streaming, low-power filter mode, and RTIO dependencies. Jira: NCSDK-37898 Signed-off-by: Bartosz Meus <bartosz.meus@nordicsemi.no>
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Switch IMU sampling from per-sample timer polling to FIFO watermark streaming (sensor_stream / RTIO) when CONFIG_IMU_FIFO_BATCH is set. The SoC sleeps while the BMI270 fills its FIFO and wakes only every 33 samples at 100 Hz, reducing CPU wake-ups by ~33x.