Documentation/iio/ade9000.rst
.. SPDX-License-Identifier: GPL-2.0
This driver supports Analog Device's ADE9000 energy measurement IC on SPI bus.
ADE9000 <https://www.analog.com/media/en/technical-documentation/data-sheets/ADE9000.pdf>_The ADE9000 is a highly accurate, fully integrated, multiphase energy and power quality monitoring device. Superior analog performance and a digital signal processing (DSP) core enable accurate energy monitoring over a wide dynamic range. An integrated high end reference ensures low drift over temperature with a combined drift of less than ±25 ppm/°C maximum for the entire channel including a programmable gain amplifier (PGA) and an analog-to-digital converter (ADC).
Power and energy measurements are provided for voltage, current, active power, reactive power, apparent power, and power factor across three phases.
Each IIO device has a device folder under /sys/bus/iio/devices/iio:deviceX,
where X is the IIO index of the device. Under these folders reside a set of
device files, depending on the characteristics and features of the hardware
device in question. These files are consistently generalized and documented in
the IIO ABI documentation.
The following tables show the ADE9000 related device files, found in the
specific device folder path /sys/bus/iio/devices/iio:deviceX.
+---------------------------------------------------+----------------------------------------------------------+ | Current measurement related device files | Description | +---------------------------------------------------+----------------------------------------------------------+ | in_current[0-2]_raw | Raw current measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_current[0-2]_scale | Scale for current channels. | +---------------------------------------------------+----------------------------------------------------------+ | in_current[0-2]_calibscale | Calibration gain for current channels (AIGAIN reg). | +---------------------------------------------------+----------------------------------------------------------+ | in_altcurrent[0-2]_rms_raw | RMS current measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_altcurrent[0-2]_rms_scale | Scale for RMS current channels. | +---------------------------------------------------+----------------------------------------------------------+ | in_altcurrent[0-2]_rms_calibbias | RMS offset correction for current channels (IRMSOS reg). | +---------------------------------------------------+----------------------------------------------------------+
+---------------------------------------------------+----------------------------------------------------------+ | Voltage measurement related device files | Description | +---------------------------------------------------+----------------------------------------------------------+ | in_voltage[0-2]_raw | Raw voltage measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_voltage[0-2]_scale | Scale for voltage channels. | +---------------------------------------------------+----------------------------------------------------------+ | in_voltage[0-2]_calibscale | Calibration gain for voltage channels (AVGAIN reg). | +---------------------------------------------------+----------------------------------------------------------+ | in_voltage[0-2]_frequency | Measured line frequency from instantaneous voltage. | +---------------------------------------------------+----------------------------------------------------------+ | in_altvoltage[0-2]_rms_raw | RMS voltage measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_altvoltage[0-2]_rms_scale | Scale for RMS voltage channels. | +---------------------------------------------------+----------------------------------------------------------+ | in_altvoltage[0-2]_rms_calibbias | RMS offset correction for voltage channels (VRMSOS reg). | +---------------------------------------------------+----------------------------------------------------------+
+---------------------------------------------------+----------------------------------------------------------+ | Power measurement related device files | Description | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_active_raw | Active power measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_active_scale | Scale for active power channels. | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_active_calibbias | Calibration offset for active power (xWATTOS regs). | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_active_calibscale | Calibration gain for active power (APGAIN reg). | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_reactive_raw | Reactive power measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_reactive_scale | Scale for reactive power channels. | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_reactive_calibbias | Calibration offset for reactive power (xVAROS regs). | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_apparent_raw | Apparent power measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_apparent_scale | Scale for apparent power channels. | +---------------------------------------------------+----------------------------------------------------------+ | in_power[0-2]_powerfactor | Power factor for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+
+---------------------------------------------------+----------------------------------------------------------+ | Energy measurement related device files | Description | +---------------------------------------------------+----------------------------------------------------------+ | in_energy[0-2]_active_raw | Active energy measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_energy[0-2]_reactive_raw | Reactive energy measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+ | in_energy[0-2]_apparent_raw | Apparent energy measurement for phases A, B, C. | +---------------------------------------------------+----------------------------------------------------------+
+------------------------------+------------------------------------------------------------------+ | Shared device attributes | Description | +------------------------------+------------------------------------------------------------------+ | name | Name of the IIO device. | +------------------------------+------------------------------------------------------------------+ | filter_type | Waveform buffer filter type (sinc4, sinc4+lp). | +------------------------------+------------------------------------------------------------------+ | filter_type_available | Available filter types for waveform buffer. | +------------------------------+------------------------------------------------------------------+
The ADE9000 provides multiple levels of gain and offset correction:
Calibration Gain (per-channel)
Fine-tuning calibration gains applied in the digital domain for each channel type.
Controlled via calibscale attributes (AIGAIN, AVGAIN, APGAIN registers).
Calibration Bias (per-channel) Hardware calibration offsets applied by the device internally:
calibbias attributes for power channels (xWATTOS, xVAROS registers).calibbias attributes for RMS channels (IRMSOS, VRMSOS registers).These are internal chip calibrations, not userspace-applied offsets.
The ADE9000 provides various interrupts that are mapped to IIO events. Event functionality is only available if the corresponding interrupts are connected in the device tree.
+---------------------------------------------------+----------------------------------------------------------+ | IIO Event Attribute | ADE9000 Datasheet Equivalent | +---------------------------------------------------+----------------------------------------------------------+ | in_voltage[0-2]_thresh_either_en | Zero crossing detection interrupt (ZXVx) | +---------------------------------------------------+----------------------------------------------------------+ | in_altvoltage[0-2]_rms_thresh_rising_en | RMS swell detection interrupt (SWELLx) | +---------------------------------------------------+----------------------------------------------------------+ | in_altvoltage[0-2]_rms_thresh_rising_value | RMS swell threshold (SWELL_LVL register) | +---------------------------------------------------+----------------------------------------------------------+ | in_altvoltage[0-2]_rms_thresh_falling_en | RMS sag/dip detection interrupt (DIPx) | +---------------------------------------------------+----------------------------------------------------------+ | in_altvoltage[0-2]_rms_thresh_falling_value | RMS sag/dip threshold (DIP_LVL register) | +---------------------------------------------------+----------------------------------------------------------+ | in_current[0-2]_thresh_either_en | Current zero crossing detection interrupt (ZXIx) | +---------------------------------------------------+----------------------------------------------------------+
Event directions:
rising: Upper threshold crossing (swell detection)falling: Lower threshold crossing (sag/dip detection)either: Any threshold crossing (zero crossing detection)none: Timeout or non-directional eventsNote: Event attributes are only available if the corresponding interrupts (irq0, irq1, dready) are specified in the device tree. The driver works without interrupts but with reduced functionality.
This driver supports IIO buffers for waveform capture. Buffer functionality requires the dready interrupt to be connected.
The device supports capturing voltage and current waveforms for power quality analysis. The waveform buffer can be configured to capture data from different channel combinations.
Supported channel combinations for buffered capture:
Enable waveform capture for Phase A:
.. code-block:: bash
root:/sys/bus/iio/devices/iio:device0> echo 1 > scan_elements/in_current0_en
root:/sys/bus/iio/devices/iio:device0> echo 1 > scan_elements/in_voltage0_en
Set buffer length and enable:
.. code-block:: bash
root:/sys/bus/iio/devices/iio:device0> echo 100 > buffer/length
root:/sys/bus/iio/devices/iio:device0> echo 1 > buffer/enable
The ADE9000 can provide a clock output via the CLKOUT pin when using an external
crystal/clock source. This feature is enabled by specifying #clock-cells = <0>
in the device tree. The output clock will be registered as "clkout" and can be
referenced by other devices.
Show device name:
.. code-block:: bash
root:/sys/bus/iio/devices/iio:device0> cat name
ade9000
Read voltage measurements:
.. code-block:: bash
root:/sys/bus/iio/devices/iio:device0> cat in_voltage0_raw
12345
root:/sys/bus/iio/devices/iio:device0> cat in_voltage0_scale
0.000030517
Read power measurements:
.. code-block:: bash
root:/sys/bus/iio/devices/iio:device0> cat in_power0_active_raw
5678
root:/sys/bus/iio/devices/iio:device0> cat in_power0_scale
0.000244140
Configure calibration gains:
.. code-block:: bash
# Set current channel 0 calibration gain
root:/sys/bus/iio/devices/iio:device0> echo 0x800000 > in_current0_calibscale
# Set voltage channel 0 calibration gain
root:/sys/bus/iio/devices/iio:device0> echo 0x7FFFFF > in_voltage0_calibscale
Configure RMS voltage event thresholds (requires interrupts):
.. code-block:: bash
# Set RMS sag detection threshold
root:/sys/bus/iio/devices/iio:device0> echo 180000 > events/in_altvoltage0_rms_thresh_falling_value
# Enable RMS sag detection
root:/sys/bus/iio/devices/iio:device0> echo 1 > events/in_altvoltage0_rms_thresh_falling_en
# Set RMS swell detection threshold
root:/sys/bus/iio/devices/iio:device0> echo 260000 > events/in_altvoltage0_rms_thresh_rising_value
# Enable RMS swell detection
root:/sys/bus/iio/devices/iio:device0> echo 1 > events/in_altvoltage0_rms_thresh_rising_en
See Documentation/iio/iio_tools.rst for the description of the available IIO interfacing tools.