Merge pull request #314 from quartiq/feature/phy-reset

Adding support for PHY reset detection

Cargo.lock

@@ -710,7 +710,7 @@ dependencies = [
 [[package]]
 name = "smoltcp-nal"
 version = "0.1.0"
-source = "git+https://github.com/quartiq/smoltcp-nal.git?rev=56519012d7#56519012d7c6a382eaa0d7ecb26f2701771d9ce8"
+source = "git+https://github.com/quartiq/smoltcp-nal.git?rev=7572183#757218316620e074405bc38ff5502ef17a8a3499"
 dependencies = [
  "embedded-nal",
  "heapless 0.6.1",

Cargo.toml

@@ -60,7 +60,7 @@ rev = "314fa5587d"
 
 [dependencies.smoltcp-nal]
 git = "https://github.com/quartiq/smoltcp-nal.git"
-rev = "56519012d7"
+rev = "7572183"
 
 [patch.crates-io.minimq]
 git = "https://github.com/quartiq/minimq.git"

src/bin/dual-iir.rs

@@ -2,17 +2,19 @@
 #![no_std]
 #![no_main]
 
-use stabilizer::hardware;
+use stabilizer::{hardware, net};
 
-use miniconf::{minimq, Miniconf, MqttInterface};
+use miniconf::Miniconf;
 use serde::Deserialize;
 
 use dsp::iir;
 use hardware::{
-    Adc0Input, Adc1Input, AfeGain, CycleCounter, Dac0Output, Dac1Output,
-    DigitalInput1, InputPin, NetworkStack, AFE0, AFE1,
+    Adc0Input, Adc1Input, AfeGain, Dac0Output, Dac1Output, DigitalInput1,
+    InputPin, AFE0, AFE1,
 };
 
+use net::{Action, MiniconfInterface};
+
 const SCALE: f32 = i16::MAX as _;
 
 // The number of cascaded IIR biquads per channel. Select 1 or 2!
@@ -44,9 +46,7 @@ const APP: () = {
         digital_input1: DigitalInput1,
         adcs: (Adc0Input, Adc1Input),
         dacs: (Dac0Output, Dac1Output),
-        mqtt_interface:
-            MqttInterface<Settings, NetworkStack, minimq::consts::U256>,
-        clock: CycleCounter,
+        mqtt_config: MiniconfInterface<Settings>,
 
         // Format: iir_state[ch][cascade-no][coeff]
         #[init([[[0.; 5]; IIR_CASCADE_LENGTH]; 2])]
@@ -59,23 +59,13 @@ const APP: () = {
         // Configure the microcontroller
         let (mut stabilizer, _pounder) = hardware::setup(c.core, c.device);
 
-        let mqtt_interface = {
-            let mqtt_client = {
-                minimq::MqttClient::new(
-                    hardware::design_parameters::MQTT_BROKER.into(),
-                    "",
+        let mqtt_config = MiniconfInterface::new(
             stabilizer.net.stack,
-                )
-                .unwrap()
-            };
-
-            MqttInterface::new(
-                mqtt_client,
+            "",
             "dt/sinara/stabilizer",
-                Settings::default(),
-            )
-            .unwrap()
-        };
+            stabilizer.net.phy,
+            stabilizer.cycle_counter,
+        );
 
         // Spawn a settings update for default settings.
         c.spawn.settings_update().unwrap();
@@ -90,11 +80,10 @@ const APP: () = {
         stabilizer.adc_dac_timer.start();
 
         init::LateResources {
-            mqtt_interface,
             afes: stabilizer.afes,
             adcs: stabilizer.adcs,
             dacs: stabilizer.dacs,
-            clock: stabilizer.cycle_counter,
+            mqtt_config,
             digital_input1: stabilizer.digital_inputs.1,
             settings: Settings::default(),
         }
@@ -151,44 +140,26 @@ const APP: () = {
         }
     }
 
-    #[idle(resources=[mqtt_interface, clock], spawn=[settings_update])]
+    #[idle(resources=[mqtt_config], spawn=[settings_update])]
     fn idle(mut c: idle::Context) -> ! {
-        let clock = c.resources.clock;
-
         loop {
-            let sleep = c.resources.mqtt_interface.lock(|interface| {
-                match interface.network_stack().poll(clock.current_ms()) {
-                    Ok(updated) => !updated,
-                    Err(err) => {
-                        log::info!("Network error: {:?}", err);
-                        false
-                    }
-                }
-            });
-
             match c
                 .resources
-                .mqtt_interface
-                .lock(|interface| interface.update())
+                .mqtt_config
+                .lock(|config_interface| config_interface.update())
             {
-                Ok(update) => {
-                    if update {
-                        c.spawn.settings_update().unwrap();
-                    } else if sleep {
-                        cortex_m::asm::wfi();
+                Some(Action::Sleep) => cortex_m::asm::wfi(),
+                Some(Action::UpdateSettings) => {
+                    c.spawn.settings_update().unwrap()
                 }
-                }
-                Err(miniconf::MqttError::Network(
-                    smoltcp_nal::NetworkError::NoIpAddress,
-                )) => {}
-                Err(error) => log::info!("Unexpected error: {:?}", error),
+                _ => {}
             }
         }
     }
 
-    #[task(priority = 1, resources=[mqtt_interface, afes, settings])]
+    #[task(priority = 1, resources=[mqtt_config, afes, settings])]
     fn settings_update(mut c: settings_update::Context) {
-        let settings = &c.resources.mqtt_interface.settings;
+        let settings = &c.resources.mqtt_config.mqtt.settings;
 
         // Update the IIR channels.
         c.resources.settings.lock(|current| *current = *settings);

src/bin/lockin-external.rs

@@ -4,16 +4,18 @@
 
 use generic_array::typenum::U4;
 
-use miniconf::{minimq, Miniconf, MqttInterface};
 use serde::Deserialize;
 
 use dsp::{Accu, Complex, ComplexExt, Lockin, RPLL};
 
 use stabilizer::hardware::{
-    design_parameters, setup, Adc0Input, Adc1Input, AfeGain, CycleCounter,
-    Dac0Output, Dac1Output, InputStamper, NetworkStack, AFE0, AFE1,
+    design_parameters, setup, Adc0Input, Adc1Input, AfeGain, Dac0Output,
+    Dac1Output, InputStamper, AFE0, AFE1,
 };
 
+use miniconf::Miniconf;
+use stabilizer::net::{Action, MiniconfInterface};
+
 #[derive(Copy, Clone, Debug, Deserialize, Miniconf)]
 enum Conf {
     PowerPhase,
@@ -56,11 +58,7 @@ const APP: () = {
         afes: (AFE0, AFE1),
         adcs: (Adc0Input, Adc1Input),
         dacs: (Dac0Output, Dac1Output),
-        clock: CycleCounter,
-
-        mqtt_interface:
-            MqttInterface<Settings, NetworkStack, minimq::consts::U256>,
-
+        mqtt_config: MiniconfInterface<Settings>,
         settings: Settings,
 
         timestamper: InputStamper,
@@ -73,21 +71,13 @@ const APP: () = {
         // Configure the microcontroller
         let (mut stabilizer, _pounder) = setup(c.core, c.device);
 
-        let mqtt_interface = {
-            let mqtt_client = minimq::MqttClient::new(
-                design_parameters::MQTT_BROKER.into(),
-                "",
+        let mqtt_config = MiniconfInterface::new(
             stabilizer.net.stack,
-            )
-            .unwrap();
-
-            MqttInterface::new(
-                mqtt_client,
+            "",
             "dt/sinara/lockin",
-                Settings::default(),
-            )
-            .unwrap()
-        };
+            stabilizer.net.phy,
+            stabilizer.cycle_counter,
+        );
 
         let settings = Settings::default();
 
@@ -118,10 +108,8 @@ const APP: () = {
             afes: stabilizer.afes,
             adcs: stabilizer.adcs,
             dacs: stabilizer.dacs,
+            mqtt_config,
             timestamper: stabilizer.timestamper,
-            clock: stabilizer.cycle_counter,
-
-            mqtt_interface,
 
             settings,
 
@@ -202,44 +190,26 @@ const APP: () = {
         }
     }
 
-    #[idle(resources=[mqtt_interface, clock], spawn=[settings_update])]
+    #[idle(resources=[mqtt_config], spawn=[settings_update])]
     fn idle(mut c: idle::Context) -> ! {
-        let clock = c.resources.clock;
-
         loop {
-            let sleep = c.resources.mqtt_interface.lock(|interface| {
-                match interface.network_stack().poll(clock.current_ms()) {
-                    Ok(updated) => !updated,
-                    Err(err) => {
-                        log::info!("Network error: {:?}", err);
-                        false
-                    }
-                }
-            });
-
             match c
                 .resources
-                .mqtt_interface
-                .lock(|interface| interface.update())
+                .mqtt_config
+                .lock(|config_interface| config_interface.update())
             {
-                Ok(update) => {
-                    if update {
-                        c.spawn.settings_update().unwrap();
-                    } else if sleep {
-                        cortex_m::asm::wfi();
+                Some(Action::Sleep) => cortex_m::asm::wfi(),
+                Some(Action::UpdateSettings) => {
+                    c.spawn.settings_update().unwrap()
                 }
-                }
-                Err(miniconf::MqttError::Network(
-                    smoltcp_nal::NetworkError::NoIpAddress,
-                )) => {}
-                Err(error) => log::info!("Unexpected error: {:?}", error),
+                _ => {}
             }
         }
     }
 
-    #[task(priority = 1, resources=[mqtt_interface, settings, afes])]
+    #[task(priority = 1, resources=[mqtt_config, settings, afes])]
     fn settings_update(mut c: settings_update::Context) {
-        let settings = &c.resources.mqtt_interface.settings;
+        let settings = &c.resources.mqtt_config.mqtt.settings;
 
         c.resources.afes.0.set_gain(settings.afe[0]);
         c.resources.afes.1.set_gain(settings.afe[1]);

src/hardware/configuration.rs

@@ -14,7 +14,7 @@ use embedded_hal::digital::v2::{InputPin, OutputPin};
 use super::{
     adc, afe, cycle_counter::CycleCounter, dac, design_parameters,
     digital_input_stamper, eeprom, pounder, timers, DdsOutput, DigitalInput0,
-    DigitalInput1, NetworkStack, AFE0, AFE1,
+    DigitalInput1, EthernetPhy, NetworkStack, AFE0, AFE1,
 };
 
 pub struct NetStorage {
@@ -56,7 +56,7 @@ impl NetStorage {
 /// The available networking devices on Stabilizer.
 pub struct NetworkDevices {
     pub stack: NetworkStack,
-    pub phy: ethernet::phy::LAN8742A<ethernet::EthernetMAC>,
+    pub phy: EthernetPhy,
 }
 
 /// The available hardware interfaces on Stabilizer.

src/hardware/mod.rs

@@ -51,6 +51,8 @@ pub type NetworkStack = smoltcp_nal::NetworkStack<
     hal::ethernet::EthernetDMA<'static>,
 >;
 
+pub type EthernetPhy = hal::ethernet::phy::LAN8742A<hal::ethernet::EthernetMAC>;
+
 pub use configuration::{setup, PounderDevices, StabilizerDevices};
 
 #[inline(never)]

src/lib.rs

@@ -5,3 +5,4 @@
 extern crate log;
 
 pub mod hardware;
+pub mod net;

src/net/mod.rs

@@ -0,0 +1,109 @@
+use crate::hardware::{
+    design_parameters::MQTT_BROKER, CycleCounter, EthernetPhy, NetworkStack,
+};
+
+use miniconf::minimq;
+
+/// Potential actions for firmware to take.
+pub enum Action {
+    /// Indicates that firmware can sleep for the next event.
+    Sleep,
+
+    /// Indicates that settings have updated and firmware needs to propogate changes.
+    UpdateSettings,
+}
+
+/// MQTT settings interface.
+pub struct MiniconfInterface<S>
+where
+    S: miniconf::Miniconf + Default,
+{
+    pub mqtt: miniconf::MqttInterface<S, NetworkStack, minimq::consts::U256>,
+    clock: CycleCounter,
+    phy: EthernetPhy,
+    network_was_reset: bool,
+}
+
+impl<S> MiniconfInterface<S>
+where
+    S: miniconf::Miniconf + Default,
+{
+    /// Construct a new MQTT settings interface.
+    ///
+    /// # Args
+    /// * `stack` - The network stack to use for communication.
+    /// * `client_id` - The ID of the MQTT client. May be an empty string for auto-assigning.
+    /// * `prefix` - The MQTT device prefix to use for this device.
+    /// * `phy` - The PHY driver for querying the link state.
+    /// * `clock` - The clock to utilize for querying the current system time.
+    pub fn new(
+        stack: NetworkStack,
+        client_id: &str,
+        prefix: &str,
+        phy: EthernetPhy,
+        clock: CycleCounter,
+    ) -> Self {
+        let mqtt = {
+            let mqtt_client = {
+                minimq::MqttClient::new(MQTT_BROKER.into(), client_id, stack)
+                    .unwrap()
+            };
+
+            miniconf::MqttInterface::new(mqtt_client, prefix, S::default())
+                .unwrap()
+        };
+
+        Self {
+            mqtt,
+            clock,
+            phy,
+            network_was_reset: false,
+        }
+    }
+
+    /// Update the MQTT interface and service the network
+    ///
+    /// # Returns
+    /// An option containing an action that should be completed as a result of network servicing.
+    pub fn update(&mut self) -> Option<Action> {
+        let now = self.clock.current_ms();
+
+        // First, service the network stack to process and inbound and outbound traffic.
+        let sleep = match self.mqtt.network_stack().poll(now) {
+            Ok(updated) => !updated,
+            Err(err) => {
+                log::info!("Network error: {:?}", err);
+                false
+            }
+        };
+
+        // If the PHY indicates there's no more ethernet link, reset the DHCP server in the network
+        // stack.
+        if self.phy.poll_link() == false {
+            // Only reset the network stack once per link reconnection. This prevents us from
+            // sending an excessive number of DHCP requests.
+            if !self.network_was_reset {
+                self.network_was_reset = true;
+                self.mqtt.network_stack().handle_link_reset();
+            }
+        } else {
+            self.network_was_reset = false;
+        }
+
+        // Finally, service the MQTT interface and handle any necessary messages.
+        match self.mqtt.update() {
+            Ok(true) => Some(Action::UpdateSettings),
+            Ok(false) if sleep => Some(Action::Sleep),
+            Ok(_) => None,
+
+            Err(miniconf::MqttError::Network(
+                smoltcp_nal::NetworkError::NoIpAddress,
+            )) => None,
+
+            Err(error) => {
+                log::info!("Unexpected error: {:?}", error);
+                None
+            }
+        }
+    }
+}