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-What: /sys/bus/iio/devices/iio:deviceX/in_count0_preset
-KernelVersion: 4.13
-Contact: fabrice.gasnier@st.com
-Description:
- Reading returns the current preset value. Writing sets the
- preset value. Encoder counts continuously from 0 to preset
- value, depending on direction (up/down).
-
-What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
-KernelVersion: 4.13
-Contact: fabrice.gasnier@st.com
-Description:
- Reading returns the list possible quadrature modes.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode
-KernelVersion: 4.13
-Contact: fabrice.gasnier@st.com
-Description:
- Configure the device counter quadrature modes:
-
- - non-quadrature:
- Encoder IN1 input servers as the count input (up
- direction).
-
- - quadrature:
- Encoder IN1 and IN2 inputs are mixed to get direction
- and count.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_count_polarity_available
-KernelVersion: 4.13
-Contact: fabrice.gasnier@st.com
-Description:
- Reading returns the list possible active edges.
-
-What: /sys/bus/iio/devices/iio:deviceX/in_count0_polarity
-KernelVersion: 4.13
-Contact: fabrice.gasnier@st.com
-Description:
- Configure the device encoder/counter active edge:
-
- - rising-edge
- - falling-edge
- - both-edges
-
- In non-quadrature mode, device counts up on active edge.
-
- In quadrature mode, encoder counting scenarios are as follows:
-
- +---------+----------+--------------------+--------------------+
- | Active | Level on | IN1 signal | IN2 signal |
- | edge | opposite +----------+---------+----------+---------+
- | | signal | Rising | Falling | Rising | Falling |
- +---------+----------+----------+---------+----------+---------+
- | Rising | High -> | Down | - | Up | - |
- | edge | Low -> | Up | - | Down | - |
- +---------+----------+----------+---------+----------+---------+
- | Falling | High -> | - | Up | - | Down |
- | edge | Low -> | - | Down | - | Up |
- +---------+----------+----------+---------+----------+---------+
- | Both | High -> | Down | Up | Up | Down |
- | edges | Low -> | Up | Down | Down | Up |
- +---------+----------+----------+---------+----------+---------+