Update LED L3 after applying config

PID may be engaged or disengaged after loading config, so make sure LED
L3 updates to match.

src/command_handler.rs

@@ -278,12 +278,12 @@ impl Handler {
         Ok(Handler::Handled)
     }
 
-    fn load_channel (socket: &mut TcpSocket, channels: &mut Channels, store: &mut FlashStore, channel: Option<usize>) -> Result<Handler, Error> {
+    fn load_channel (socket: &mut TcpSocket, channels: &mut Channels, leds: &mut Leds, store: &mut FlashStore, channel: Option<usize>) -> Result<Handler, Error> {
         for c in 0..CHANNELS {
             if channel.is_none() || channel == Some(c) {
                 match store.read_value::<ChannelConfig>(CHANNEL_CONFIG_KEY[c]) {
                     Ok(Some(config)) => {
-                        config.apply(channels, c);
+                        config.apply(channels, c, leds);
                         send_line(socket, b"{}");
                     }
                     Ok(None) => {
@@ -436,7 +436,7 @@ impl Handler {
             Command::SteinhartHart { channel, parameter, value } => Handler::set_steinhart_hart(socket, channels, channel, parameter, value),
             Command::PostFilter { channel, rate: None } => Handler::reset_post_filter(socket, channels, channel),
             Command::PostFilter { channel, rate: Some(rate) } => Handler::set_post_filter(socket, channels, channel, rate),
-            Command::Load { channel } => Handler::load_channel(socket, channels, store, channel),
+            Command::Load { channel } => Handler::load_channel(socket, channels, leds, store, channel),
             Command::Save { channel } => Handler::save_channel(socket, channels, channel, store),
             Command::Ipv4(config) => Handler::set_ipv4(socket, store, config),
             Command::Reset => Handler::reset(channels),

src/config.rs

@@ -10,6 +10,7 @@ use crate::{
     command_parser::CenterPoint,
     pid,
     steinhart_hart,
+    leds::Leds,
 };
 
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
@@ -44,7 +45,7 @@ impl ChannelConfig {
         }
     }
 
-    pub fn apply(&self, channels: &mut Channels, channel: usize) {
+    pub fn apply(&self, channels: &mut Channels, channel: usize, leds: &mut Leds) {
         let state = channels.channel_state(channel);
         state.center = self.center.clone();
         state.pid.parameters = self.pid.clone();
@@ -59,6 +60,13 @@ impl ChannelConfig {
             adc_postfilter => Some(adc_postfilter),
         };
         let _ = channels.adc.set_postfilter(channel as u8, adc_postfilter);
+
+        // Update L3 if PID status changed
+        if channels.pid_engaged() {
+            leds.g3.on();
+        } else {
+            leds.g3.off();
+        }
     }
 }
 

src/main.rs

@@ -143,7 +143,7 @@ fn main() -> ! {
     for c in 0..CHANNELS {
         match store.read_value::<ChannelConfig>(CHANNEL_CONFIG_KEY[c]) {
             Ok(Some(config)) =>
-                config.apply(&mut channels, c),
+                config.apply(&mut channels, c, &mut leds),
             Ok(None) =>
                 error!("flash config not found for channel {}", c),
             Err(e) =>