sysfs-bus-iio-light-isl29018 963 B

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  1. What: /sys/bus/iio/devices/iio:deviceX/proximity_on_chip_ambient_infrared_suppression
  2. Date: January 2011
  3. KernelVersion: 2.6.37
  4. Contact: linux-iio@vger.kernel.org
  5. Description:
  6. From ISL29018 Data Sheet (FN6619.4, Oct 8, 2012) regarding the
  7. infrared suppression:
  8. Scheme 0, makes full n (4, 8, 12, 16) bits (unsigned) proximity
  9. detection. The range of Scheme 0 proximity count is from 0 to
  10. 2^n. Logic 1 of this bit, Scheme 1, makes n-1 (3, 7, 11, 15)
  11. bits (2's complementary) proximity_less_ambient detection. The
  12. range of Scheme 1 proximity count is from -2^(n-1) to 2^(n-1).
  13. The sign bit is extended for resolutions less than 16. While
  14. Scheme 0 has wider dynamic range, Scheme 1 proximity detection
  15. is less affected by the ambient IR noise variation.
  16. == =============================================
  17. 0 Sensing IR from LED and ambient
  18. 1 Sensing IR from LED with ambient IR rejection
  19. == =============================================