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//! Electronic-load nets (Rigol DL3000 family).
use super::net_handle;
pub use crate::wire::EloadState;
/// E-load operating mode.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum EloadMode {
/// Constant current (A).
Cc,
/// Constant voltage (V).
Cv,
/// Constant resistance (ohm).
Cr,
/// Constant power (W).
Cp,
}
impl EloadMode {
/// Wire encoding (the `/net/command` action name).
pub fn as_str(&self) -> &'static str {
match self {
EloadMode::Cc => "cc",
EloadMode::Cv => "cv",
EloadMode::Cr => "cr",
EloadMode::Cp => "cp",
}
}
}
pub(crate) mod ops {
use serde_json::json;
use super::EloadMode;
use crate::wire::{net_command, unit, value_as, value_f64, EloadState, Op, Timeout};
const ROLE: &str = "eload";
pub(crate) fn state(name: &str) -> Op<EloadState> {
Op {
req: net_command(name, ROLE, "state", json!({}), Timeout::Default),
parse: value_as::<EloadState>,
}
}
pub(crate) fn set(name: &str, mode: EloadMode, value: f64) -> Op<()> {
// Mode + setpoint is one composite /invoke box-side, so it applies
// atomically under the instrument lock.
Op {
req: net_command(
name,
ROLE,
mode.as_str(),
json!({ "value": value }),
Timeout::Default,
),
parse: unit,
}
}
pub(crate) fn setpoint(name: &str, mode: EloadMode) -> Op<f64> {
Op {
req: net_command(name, ROLE, mode.as_str(), json!({}), Timeout::Default),
parse: value_f64,
}
}
}
net_handle! {
/// Handle for an electronic-load net.
sync: Eload,
async: AsyncEload,
methods: {
/// Read the full load state (mode, input enable, measurements).
fn state() -> EloadState = ops::state;
/// Switch to `mode` and apply `value` as its setpoint, atomically.
fn set(mode: EloadMode, value: f64) -> () = ops::set;
/// Read the stored setpoint for `mode`.
fn setpoint(mode: EloadMode) -> f64 = ops::setpoint;
}
}