Programmable digital load

This page documents the config keys and various other info needed to write a libsigrok frontend for controlling programmable digital loads.

TODO

• Missing key/function SR_CONF_UNDER_VOLTAGE_CONDITION_THRESHOLD.
• Rename keys SR_CONF_UNDER_VOLTAGE_CONDITION and SR_CONF_OVER_TEMPERATURE_PROTECTION for consistency?

Notes

• All supported loads contain one channel group ("1") with two channels (actual measured voltage and current).
• Each data packet of one measurement of a voltage and a current is surrounded by a frame.

Config keys

A libsigrok driver for a programmable electronic digital load implements all or some subset of the following config keys.

SR_CONF_ELECTRONIC_LOAD

Denotes a device that provides a power sink via one or more input channels, typically with a current set via the sigrok driver.

SR_CONF_ENABLED

• boolean
• get: Actual state of input.
• set: Turn input on or off.
• list: NA

SR_CONF_REGULATION

• string ("CC", "CV", "UR", ...)
• get: Actual mode of operation (e.g. constant current, constant voltage, constant power, ...)
• set: Set the mode of operation.
• list: NA, TODO?

SR_CONF_VOLTAGE

• double, representing voltage.
• get: Actual input voltage. This may not be the same as what was set -- the input may be disabled, or can change depending on the source.
• set: NA
• list: NA

SR_CONF_VOLTAGE_TARGET

• double, representing voltage.
• get: Current set input voltage for constant voltage mode.
• set: Set the input voltage for constant voltage mode.
• list: Supported voltage range as (low, high, step).

SR_CONF_CURRENT

• double, representing current.
• get: Actual input current. This may not be the same as what was set -- the input may be disabled, or can change depending on the source.
• set: NA
• list: NA

SR_CONF_CURRENT_LIMIT

• double, representing current.
• get: Actual set input current for constant current mode.
• set: Set the input current for constant current mode.
• list: Supported current range as (low, high, step).

SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED

• boolean
• get: TRUE, when the over voltage protection is enabled.
• set: NA
• list: NA

SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE

• boolean
• get: TRUE, when the over voltage protection threshold was reached.
• set: NA
• list: NA

SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD

• double, representing voltage.
• get: Actual over voltage protection threshold.
• set: Set over voltage protection threshold.
• list: NA, TODO?

SR_CONF_OVER_CURRENT_PROTECTION_ENABLED

• boolean
• get: TRUE, when the over current protection is enabled.
• set: NA
• list: NA

SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE

• boolen
• get: TRUE, when the over current protection threshold was reached.
• set: NA
• list: NA

SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD

• double, representing current.
• get: Actual over current protection threshold.
• set: Set over current protection threshold.
• list: NA, TODO?

SR_CONF_UNDER_VOLTAGE_CONDITION

TODO: Rename to SR_CONF_UNDER_VOLTAGE_CONDITION_ENABLED for consistency?

• boolean
• get: TRUE, when the under voltage protection is enabled.
• set: NA
• list: NA

SR_CONF_UNDER_VOLTAGE_CONDITION_ACTIVE

• boolen
• get: TRUE, when the under voltage protection threshold was reached.
• set: NA
• list: NA

SR_CONF_UNDER_VOLTAGE_CONDITION_THRESHOLD

TODO: Key is missing, but can be set for various loads (e.g Arachnid Labs Re:load Pro).

• double, representing voltage.
• get: Actual under voltage protection threshold.
• set: Set under voltage protection threshold.
• list: NA, TODO?

SR_CONF_OVER_TEMPERATURE_PROTECTION

TODO: Rename to SR_CONF_OVER_TEMPERATURE_PROTECTION_ENABLED for consistency?

• boolean
• get: TRUE, when the over temperature protection is enabled.
• set: NA
• list: NA

SR_CONF_OVER_TEMPERATURE_PROTECTION_ACTIVE

• boolean
• get: TRUE, when the over temperature protection threshold was reached.
• set: NA
• list: NA