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LD: Setting LD output current now ramps up slowly

This commit is contained in:
linuswck 2024-01-26 16:36:28 +08:00
parent edd30e94a0
commit d391e3a1fb
1 changed files with 33 additions and 5 deletions
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38
src/laser_diode/laser_diode.rs
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@ -1,16 +1,19 @@
use miniconf::Miniconf; use miniconf::Miniconf;
use stm32f4xx_hal::pac::ADC2; use stm32f4xx_hal::pac::ADC2;
use uom::si::electric_current::ampere;
use crate::laser_diode::ld_ctrl::LdCtrl; use crate::laser_diode::ld_ctrl::LdCtrl;
use crate::laser_diode::ld_pwr_exc_protector::{LdPwrExcProtector, self}; use crate::laser_diode::ld_pwr_exc_protector::{LdPwrExcProtector, self};
use crate::laser_diode::pd_responsitivity; use crate::laser_diode::pd_responsitivity;
use core::marker::PhantomData; use core::marker::PhantomData;
use crate::device::sys_timer::sleep;
use uom::si::{ use uom::si::{
electric_current::milliampere, electric_current::milliampere,
f64::{ElectricPotential, ElectricCurrent, Power}, f64::{ElectricPotential, ElectricCurrent, Power},
}; };
use num_traits::Float;
use uom::{si::{ISQ, SI, Quantity}, typenum::*}; use uom::{si::{ISQ, SI, Quantity, ratio::ratio}, typenum::*};
// Volt / Ampere // Volt / Ampere
pub type TransimpedanceUnit = Quantity<ISQ<P2, P1, N3, N2, Z0, Z0, Z0>, SI<f64>, f64>; pub type TransimpedanceUnit = Quantity<ISQ<P2, P1, N3, N2, Z0, Z0, Z0>, SI<f64>, f64>;
@ -36,6 +39,14 @@ impl Settings{
units: PhantomData, units: PhantomData,
value: 10.0 / 0.75, value: 10.0 / 0.75,
}; };
const LD_CURRENT_STEP_SIZE: ElectricCurrent = ElectricCurrent {
dimension: PhantomData,
units: PhantomData,
value: 0.0001,
};
const LD_CURRENT_TIME_STEP_MS: u32 = 1;
} }
#[derive(Clone, Debug, Miniconf)] #[derive(Clone, Debug, Miniconf)]
@ -105,11 +116,28 @@ impl LdDrive{
LdPwrExcProtector::get_status().v * Settings::PD_MON_TRANSCONDUCTANCE LdPwrExcProtector::get_status().v * Settings::PD_MON_TRANSCONDUCTANCE
} }
// Ramping up or down laser diode current according to preset current step size and time step.
pub fn ld_set_i(&mut self, i: ElectricCurrent) -> ElectricCurrent { pub fn ld_set_i(&mut self, i: ElectricCurrent) -> ElectricCurrent {
let ld_i_set = i.min(self.settings.ld_drive_current_limit); let mut prev_i_set = self.settings.ld_drive_current;
let ld_i_set = self.ctrl.set_i(ld_i_set, Settings::LD_DRIVE_TRANSIMPEDANCE, Settings::DAC_OUT_V_MAX); let final_i_set = i.min(self.settings.ld_drive_current_limit).max(ElectricCurrent::new::<ampere>(0.0));
self.settings.ld_drive_current = ld_i_set;
ld_i_set let num_of_step = ((final_i_set - prev_i_set)/Settings::LD_CURRENT_STEP_SIZE).get::<ratio>().floor() as i32;
let current_step = if num_of_step.is_positive() {
Settings::LD_CURRENT_STEP_SIZE
} else {
-Settings::LD_CURRENT_STEP_SIZE
};
for _ in (0..num_of_step.abs()).rev() {
prev_i_set = prev_i_set + current_step;
let _ = self.ctrl.set_i(prev_i_set, Settings::LD_DRIVE_TRANSIMPEDANCE, Settings::DAC_OUT_V_MAX);
sleep(Settings::LD_CURRENT_TIME_STEP_MS);
}
let prev_i_set = self.ctrl.set_i(final_i_set, Settings::LD_DRIVE_TRANSIMPEDANCE, Settings::DAC_OUT_V_MAX);
self.settings.ld_drive_current = prev_i_set;
prev_i_set
} }
// Set the calibrated VDDA value obtained from ADC1 calibration // Set the calibrated VDDA value obtained from ADC1 calibration