DAC

​

Handle

use lager::LagerBox;

let lager = LagerBox::from_env()?;
let dac = lager.dac("dac1");

​

Methods

​

Method Reference

​

name() -> &str

​

set(volts: f64) -> Result<()>

dac.set(1.8)?;

​

read() -> Result<f64>

let v = dac.read()?;

​

Examples

​

Sweep a reference and check the DUT tracks it

let dac = lager.dac("dac1");
let sense = lager.adc("adc1");

for target in [0.0_f64, 0.5, 1.0, 1.5, 2.0] {
    dac.set(target)?;
    std::thread::sleep(std::time::Duration::from_millis(50));
    let measured = sense.read()?;
    assert!((measured - target).abs() < 0.05,
            "set {target:.2} V, measured {measured:.4} V");
}
dac.set(0.0)?;

​

Supported Hardware

​

Notes

• Leave the output where the next test expects it. A DAC holds its last value after your test ends; setting it back to 0.0 in teardown is usually right.
• Output accuracy is the instrument’s, not the API’s. A LabJack T7 asked for 1.0 V reads back around 0.99995 V, which is the DAC’s resolution rather than an error.