ld: Fix unable to save & load ld_i flash settings

src/laser_diode/laser_diode.rs

@@ -118,7 +118,7 @@ impl LdDrive{
     }
 
     pub fn power_up(&mut self){
-        let prev_i_set = LdCurrentOutCtrlTimer::get_target_i();
+        let prev_i_set = self.settings.ld_drive_current;
         LdCurrentOutCtrlTimer::reset();        
         let _ = self.ctrl.set_i(ElectricCurrent::new::<milliampere>(0.0), Settings::LD_DRIVE_TRANSIMPEDANCE, Settings::DAC_OUT_V_MAX);
         LdPwrExcProtector::pwr_on_and_arm_protection();
@@ -142,14 +142,14 @@ impl LdDrive{
     }
 
     pub fn ld_set_i(&mut self, i: ElectricCurrent){
-        LdCurrentOutCtrlTimer::set_target_i_and_listen_irq(i, self.settings.ld_drive_current);
+        self.settings.ld_drive_current = i;
+        LdCurrentOutCtrlTimer::set_target_i_and_listen_irq(i, self.ctrl.get_i_set());
     }
 
     pub fn poll_and_update_output_current(&mut self) -> ElectricCurrent {
         match LdCurrentOutCtrlTimer::get_irq_status() {
             Some(i_set) => {
                 let i_set = self.ctrl.set_i(i_set, Settings::LD_DRIVE_TRANSIMPEDANCE, Settings::DAC_OUT_V_MAX);
-                self.settings.ld_drive_current = i_set;
                 LdCurrentOutCtrlTimer::clear_alarm_and_resume_listening();
                 i_set
             }
@@ -195,10 +195,15 @@ impl LdDrive{
     }
 
     pub fn get_status_report(&mut self) -> StatusReport {
+        let ld_i_set = if LdPwrExcProtector::get_status().pwr_engaged {
+            self.ctrl.get_i_set()
+        } else {
+            ElectricCurrent::new::<ampere>(0.0)
+        };
         StatusReport {
             pwr_on: LdPwrExcProtector::get_status().pwr_engaged,
             pwr_excursion: LdPwrExcProtector::get_status().pwr_excursion,
-            ld_i_set: self.settings.ld_drive_current,
+            ld_i_set: ld_i_set,
             pd_i: self.get_pd_i(),
             pd_pwr: self.get_pd_pwr(),
             term_status: self.get_term_status(),

src/laser_diode/ld_ctrl.rs

@@ -9,6 +9,7 @@ use stm32f4xx_hal::{
 use uom::si::{
     ratio::ratio,
     f32::{ElectricPotential, ElectricCurrent}, 
+    electric_current::ampere, 
 };
 
 use crate::laser_diode::max5719::{self, Dac};
@@ -49,12 +50,14 @@ type DacLoad = PB14<Output<PushPull>>;
 
 pub struct LdCtrl{
     pub phy: LdCtrlPhy<Channel0>,
+    i_set: ElectricCurrent,
 }
 
 impl LdCtrl {
     pub fn new(phy_ch0: LdCtrlPhy<Channel0>) -> Self {
         LdCtrl {
             phy: phy_ch0,
+            i_set: ElectricCurrent::new::<ampere>(0.0)
         }
     }
 
@@ -85,6 +88,11 @@ impl LdCtrl {
     }
 
     pub fn set_i(&mut self, current: ElectricCurrent, transimpedance: TransimpedanceUnit, dac_out_v_max: ElectricPotential) -> ElectricCurrent {
-        self.set_dac(current * transimpedance, dac_out_v_max) / transimpedance
+        self.i_set = self.set_dac(current * transimpedance, dac_out_v_max) / transimpedance;
+        self.i_set
+    }
+
+    pub fn get_i_set(&mut self) -> ElectricCurrent{
+        self.i_set
     }
 }

src/laser_diode/ld_current_out_ctrl_timer.rs

@@ -63,13 +63,6 @@ impl LdCurrentOutCtrlTimer {
         }
     }
 
-    pub fn get_target_i() -> ElectricCurrent {
-        if let Some(ref mut ld_current_out_ctrl_timer ) = LdCurrentOutCtrlTimer::get() {
-            return ld_current_out_ctrl_timer.target_i
-        }
-        ElectricCurrent::new::<ampere>(0.0)
-    }
-
     pub fn set_alarm() {
         if let Some(ref mut ld_current_out_ctrl_timer ) = LdCurrentOutCtrlTimer::get() {
             ld_current_out_ctrl_timer.timeout = true;