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