screens: overtemperature: add over temperature warning screen

Notify the user if the TAC is running hot.

Signed-off-by: Leonard Göhrs <l.goehrs@pengutronix.de>

Author: hnez

src/ui/screens.rs

@@ -31,6 +31,7 @@ mod help;
 mod iobus;
 mod iobus_health;
 mod locator;
+mod overtemperature;
 mod power;
 mod reboot;
 mod screensaver;
@@ -46,6 +47,7 @@ use help::HelpScreen;
 use iobus::IoBusScreen;
 use iobus_health::IoBusHealthScreen;
 use locator::LocatorScreen;
+use overtemperature::OverTemperatureScreen;
 use power::PowerScreen;
 use reboot::RebootConfirmScreen;
 use screensaver::ScreenSaverScreen;
@@ -84,6 +86,7 @@ pub enum AlertScreen {
     UpdateInstallation,
     Help,
     Setup,
+    OverTemperature,
 }
 
 #[derive(Serialize, Deserialize, PartialEq, PartialOrd, Eq, Ord, Clone, Copy, Debug)]
@@ -199,6 +202,10 @@ pub(super) fn init(
         Box::new(RebootConfirmScreen::new(alerts, reboot_message)),
         Box::new(ScreenSaverScreen::new(buttons, alerts)),
         Box::new(SetupScreen::new(alerts, &res.setup_mode.setup_mode)),
+        Box::new(OverTemperatureScreen::new(
+            alerts,
+            &res.temperatures.warning,
+        )),
         Box::new(LocatorScreen::new(alerts, locator)),
     ]
 }

src/ui/screens/overtemperature.rs

@@ -0,0 +1,114 @@
+// This file is part of tacd, the LXA TAC system daemon
+// Copyright (C) 2023 Pengutronix e.K.
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+use async_std::prelude::*;
+use async_std::sync::Arc;
+use async_std::task::spawn;
+use async_trait::async_trait;
+use embedded_graphics::{
+    mono_font::MonoTextStyle, pixelcolor::BinaryColor, prelude::*, text::Text,
+};
+
+use super::widgets::*;
+use super::{
+    row_anchor, ActivatableScreen, ActiveScreen, AlertList, AlertScreen, Alerter, Display,
+    InputEvent, Screen, Ui,
+};
+use crate::broker::Topic;
+use crate::measurement::Measurement;
+use crate::temperatures::Warning;
+
+const SCREEN_TYPE: AlertScreen = AlertScreen::OverTemperature;
+
+pub struct OverTemperatureScreen;
+
+struct Active {
+    widgets: WidgetContainer,
+}
+
+impl OverTemperatureScreen {
+    pub fn new(alerts: &Arc<Topic<AlertList>>, warning: &Arc<Topic<Warning>>) -> Self {
+        let (mut warning_events, _) = warning.clone().subscribe_unbounded();
+        let alerts = alerts.clone();
+
+        spawn(async move {
+            while let Some(warning) = warning_events.next().await {
+                match warning {
+                    Warning::Okay => alerts.deassert(SCREEN_TYPE),
+                    Warning::SocHigh | Warning::SocCritical => alerts.assert(SCREEN_TYPE),
+                }
+            }
+        });
+
+        Self
+    }
+}
+
+impl ActivatableScreen for OverTemperatureScreen {
+    fn my_type(&self) -> Screen {
+        Screen::Alert(SCREEN_TYPE)
+    }
+
+    fn activate(&mut self, ui: &Ui, display: Display) -> Box<dyn ActiveScreen> {
+        let ui_text_style: MonoTextStyle<BinaryColor> =
+            MonoTextStyle::new(&UI_TEXT_FONT, BinaryColor::On);
+
+        display.with_lock(|target| {
+            Text::new("Temperature alert!", row_anchor(0), ui_text_style)
+                .draw(target)
+                .unwrap();
+
+            Text::new(
+                "TAC is overheating.\nProvide more airflow\nand check loads.",
+                row_anchor(2),
+                ui_text_style,
+            )
+            .draw(target)
+            .unwrap();
+
+            Text::new("SoC Temperature:", row_anchor(6), ui_text_style)
+                .draw(target)
+                .unwrap();
+        });
+
+        let mut widgets = WidgetContainer::new(display);
+
+        widgets.push(|display| {
+            DynamicWidget::text_center(
+                ui.res.temperatures.soc_temperature.clone(),
+                display,
+                Point::new(120, 210),
+                Box::new(|meas: &Measurement| format!("{:-4.0} C", meas.value)),
+            )
+        });
+
+        Box::new(Active { widgets })
+    }
+}
+
+#[async_trait]
+impl ActiveScreen for Active {
+    fn my_type(&self) -> Screen {
+        Screen::Alert(SCREEN_TYPE)
+    }
+
+    async fn deactivate(mut self: Box<Self>) -> Display {
+        self.widgets.destroy().await
+    }
+
+    fn input(&mut self, _ev: InputEvent) {}
+}