I/O

src/g13/joystick/axis.rs

@@ -1,6 +1,6 @@
 use std::slice;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub enum Axis {
     X,
     Y,

src/g13/joystick/button.rs

@@ -1,6 +1,6 @@
 use std::slice;
 
-#[derive(Debug)]
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub enum Button {
     Back,
     Screen1,
@@ -88,7 +88,7 @@ impl Button {
         }
     }
 
-    pub(super) fn all_buttons() -> slice::Iter<'static, Self> {
+    pub fn all_buttons() -> slice::Iter<'static, Self> {
         use Button::*;
         [
             Back, Screen1, Screen2, Screen3, Screen4, Light, M1, M2, M3, MR, G1, G2, G3, G4, G5, G6, G7, G8, G9, G10,

src/g13/joystick/mod.rs

@@ -1,3 +1,5 @@
+// gracefully stolen from https://github.com/gwilymk/arduino-joystick/tree/master/joystick-daemon/src/joystick <3
+
 mod axis;
 mod button;
 mod error;

src/g13/mod.rs

@@ -1,7 +1,9 @@
 pub mod joystick;
 
 use std::{
+    collections::HashMap,
     io::{Read, Write},
+    sync::Arc,
     time::Duration,
 };
 
@@ -14,9 +16,12 @@ use nusb::{
     Interface,
     transfer::{ControlOut, ControlType, In, Interrupt, Out, Recipient},
 };
+use tokio::sync::RwLock;
 
 use crate::g13::joystick::{Axis, Button, Joystick};
 
+const STICK_DEADZONE: i32 = 30;
+
 pub const G13_LCD_COLUMNS: i32 = 160;
 pub const G13_LCD_ROWS: i32 = 43;
 pub const G13_LCD_BYTES_PER_ROW: i32 = G13_LCD_COLUMNS / 8;
@@ -27,6 +32,66 @@ pub struct G13 {
     interface: Interface,
     joystick: Joystick,
     img_buffer: [u8; G13_LCD_BUF_SIZE as usize + 8],
+    pub state: State,
+}
+
+#[derive(Debug, Clone)]
+pub struct State {
+    x: Arc<RwLock<i32>>,
+    y: Arc<RwLock<i32>>,
+    buttons: Arc<RwLock<HashMap<Button, bool>>>,
+}
+
+impl Default for State {
+    fn default() -> Self {
+        let mut buttons = HashMap::new();
+        for button in Button::all_buttons() {
+            buttons.insert(button.clone(), false);
+        }
+
+        Self {
+            x: Arc::new(RwLock::new(0)),
+            y: Arc::new(RwLock::new(0)),
+            buttons: Arc::new(RwLock::new(buttons)),
+        }
+    }
+}
+
+#[allow(unused)]
+impl State {
+    pub async fn get_x(&self) -> f64 {
+        let mut value = *self.x.read().await;
+        if value < STICK_DEADZONE && value > -STICK_DEADZONE {
+            value = 0;
+        }
+
+        value as f64 / 512.0
+    }
+
+    pub async fn get_y(&self) -> f64 {
+        let mut value = *self.y.read().await;
+        if value < STICK_DEADZONE && value > -STICK_DEADZONE {
+            value = 0;
+        }
+
+        value as f64 / 512.0
+    }
+
+    pub async fn is_down(&self, button: Button) -> bool {
+        self.buttons.read().await[&button]
+    }
+
+    async fn set_x(&self, value: i32) {
+        *self.x.write().await = value;
+    }
+
+    async fn set_y(&self, value: i32) {
+        *self.y.write().await = value;
+    }
+
+    async fn set_button(&self, button: Button, value: bool) {
+        self.buttons.write().await.insert(button, value);
+    }
 }
 
 impl G13 {
@@ -65,6 +130,7 @@ impl G13 {
             interface,
             joystick,
             img_buffer,
+            state: Default::default(),
         })
     }
 
@@ -73,52 +139,91 @@ impl G13 {
         let mut buf = [0; 8];
         reader.read_exact(&mut buf)?;
 
-        self.joystick
-            .move_axis(Axis::X, (((buf[1] as f64) / 256.0 * 1024.0) - 512.0) as i32)?;
-        self.joystick
-            .move_axis(Axis::Y, (((buf[2] as f64) / 256.0 * 1024.0) - 512.0) as i32)?;
+        let x = (((buf[1] as f64) / 256.0 * 1024.0) - 512.0) as i32;
+        let y = (((buf[2] as f64) / 256.0 * 1024.0) - 512.0) as i32;
+
+        self.state.set_x(x).await;
+        self.state.set_y(y).await;
+
+        self.joystick.move_axis(Axis::X, x)?;
+        self.joystick.move_axis(Axis::Y, y)?;
 
         // the right most bit of the 7th byte is the back button
         self.joystick.button_press(Button::Back, buf[6] & 0b00000001 != 0)?;
+        self.state.set_button(Button::Back, buf[6] & 0b00000001 != 0).await;
         self.joystick.button_press(Button::Screen1, buf[6] & 0b00000010 != 0)?;
+        self.state.set_button(Button::Screen1, buf[6] & 0b00000010 != 0).await;
         self.joystick.button_press(Button::Screen2, buf[6] & 0b00000100 != 0)?;
+        self.state.set_button(Button::Screen2, buf[6] & 0b00000100 != 0).await;
         self.joystick.button_press(Button::Screen3, buf[6] & 0b00001000 != 0)?;
+        self.state.set_button(Button::Screen3, buf[6] & 0b00001000 != 0).await;
         self.joystick.button_press(Button::Screen4, buf[6] & 0b00010000 != 0)?;
+        self.state.set_button(Button::Screen4, buf[6] & 0b00010000 != 0).await;
         self.joystick.button_press(Button::Light, buf[7] & 0b0100000 != 0)?;
+        self.state.set_button(Button::Light, buf[7] & 0b0100000 != 0).await;
 
         self.joystick.button_press(Button::M1, buf[6] & 0b00100000 != 0)?;
+        self.state.set_button(Button::M1, buf[6] & 0b00100000 != 0).await;
         self.joystick.button_press(Button::M2, buf[6] & 0b01000000 != 0)?;
+        self.state.set_button(Button::M2, buf[6] & 0b01000000 != 0).await;
         self.joystick.button_press(Button::M3, buf[6] & 0b10000000 != 0)?;
+        self.state.set_button(Button::M3, buf[6] & 0b10000000 != 0).await;
         self.joystick.button_press(Button::MR, buf[7] & 0b00000001 != 0)?;
+        self.state.set_button(Button::MR, buf[7] & 0b00000001 != 0).await;
 
         self.joystick.button_press(Button::G1, buf[3] & 0b00000001 != 0)?;
+        self.state.set_button(Button::G1, buf[3] & 0b00000001 != 0).await;
         self.joystick.button_press(Button::G2, buf[3] & 0b00000010 != 0)?;
+        self.state.set_button(Button::G2, buf[3] & 0b00000010 != 0).await;
         self.joystick.button_press(Button::G3, buf[3] & 0b00000100 != 0)?;
+        self.state.set_button(Button::G3, buf[3] & 0b00000100 != 0).await;
         self.joystick.button_press(Button::G4, buf[3] & 0b00001000 != 0)?;
+        self.state.set_button(Button::G4, buf[3] & 0b00001000 != 0).await;
         self.joystick.button_press(Button::G5, buf[3] & 0b00010000 != 0)?;
+        self.state.set_button(Button::G5, buf[3] & 0b00010000 != 0).await;
         self.joystick.button_press(Button::G6, buf[3] & 0b00100000 != 0)?;
+        self.state.set_button(Button::G6, buf[3] & 0b00100000 != 0).await;
         self.joystick.button_press(Button::G7, buf[3] & 0b01000000 != 0)?;
+        self.state.set_button(Button::G7, buf[3] & 0b01000000 != 0).await;
         self.joystick.button_press(Button::G8, buf[3] & 0b10000000 != 0)?;
+        self.state.set_button(Button::G8, buf[3] & 0b10000000 != 0).await;
 
         self.joystick.button_press(Button::G9, buf[4] & 0b00000001 != 0)?;
+        self.state.set_button(Button::G9, buf[4] & 0b00000001 != 0).await;
         self.joystick.button_press(Button::G10, buf[4] & 0b00000010 != 0)?;
+        self.state.set_button(Button::G10, buf[4] & 0b00000010 != 0).await;
         self.joystick.button_press(Button::G11, buf[4] & 0b00000100 != 0)?;
+        self.state.set_button(Button::G11, buf[4] & 0b00000100 != 0).await;
         self.joystick.button_press(Button::G12, buf[4] & 0b00001000 != 0)?;
+        self.state.set_button(Button::G12, buf[4] & 0b00001000 != 0).await;
         self.joystick.button_press(Button::G13, buf[4] & 0b00010000 != 0)?;
+        self.state.set_button(Button::G13, buf[4] & 0b00010000 != 0).await;
         self.joystick.button_press(Button::G14, buf[4] & 0b00100000 != 0)?;
+        self.state.set_button(Button::G14, buf[4] & 0b00100000 != 0).await;
         self.joystick.button_press(Button::G15, buf[4] & 0b01000000 != 0)?;
+        self.state.set_button(Button::G15, buf[4] & 0b01000000 != 0).await;
         self.joystick.button_press(Button::G16, buf[4] & 0b10000000 != 0)?;
+        self.state.set_button(Button::G16, buf[4] & 0b10000000 != 0).await;
 
         self.joystick.button_press(Button::G17, buf[5] & 0b00000001 != 0)?;
+        self.state.set_button(Button::G17, buf[5] & 0b00000001 != 0).await;
         self.joystick.button_press(Button::G18, buf[5] & 0b00000010 != 0)?;
+        self.state.set_button(Button::G18, buf[5] & 0b00000010 != 0).await;
         self.joystick.button_press(Button::G19, buf[5] & 0b00000100 != 0)?;
+        self.state.set_button(Button::G19, buf[5] & 0b00000100 != 0).await;
         self.joystick.button_press(Button::G20, buf[5] & 0b00001000 != 0)?;
+        self.state.set_button(Button::G20, buf[5] & 0b00001000 != 0).await;
         self.joystick.button_press(Button::G21, buf[5] & 0b00010000 != 0)?;
+        self.state.set_button(Button::G21, buf[5] & 0b00010000 != 0).await;
         self.joystick.button_press(Button::G22, buf[5] & 0b00100000 != 0)?;
+        self.state.set_button(Button::G22, buf[5] & 0b00100000 != 0).await;
 
         self.joystick.button_press(Button::Stick1, buf[7] & 0b00000010 != 0)?;
+        self.state.set_button(Button::Stick1, buf[7] & 0b00000010 != 0).await;
         self.joystick.button_press(Button::Stick2, buf[7] & 0b00000100 != 0)?;
+        self.state.set_button(Button::Stick2, buf[7] & 0b00000100 != 0).await;
         self.joystick.button_press(Button::Stick3, buf[7] & 0b00001000 != 0)?;
+        self.state.set_button(Button::Stick3, buf[7] & 0b00001000 != 0).await;
 
         self.joystick.synchronise()?;
 
@@ -157,7 +262,7 @@ impl G13 {
 
 impl Dimensions for G13 {
     fn bounding_box(&self) -> Rectangle {
-        Rectangle::new(Point::new(1, 1), Size::new(160, 42))
+        Rectangle::new(Point::new(0, 0), Size::new(160, 42))
     }
 }
 
@@ -170,6 +275,10 @@ impl DrawTarget for G13 {
         I: IntoIterator<Item = embedded_graphics_core::Pixel<Self::Color>>,
     {
         for p in pixels {
+            if p.0.x < 0 || p.0.x > G13_LCD_COLUMNS || p.0.y < 0 || p.0.y > G13_LCD_ROWS {
+                continue;
+            }
+
             let offset = image_byte_offset(p.0.y, p.0.x);
 
             let mask = 1 << (p.0.y.rem_euclid(8));

src/main.rs

@@ -6,7 +6,8 @@ use embedded_graphics::{
     prelude::*,
     text::{Alignment, Text, TextStyleBuilder},
 };
-use time::OffsetDateTime;
+use time::{OffsetDateTime, macros::offset};
+use tokio::time::Instant;
 
 use crate::g13::{G13, G13_LCD_COLUMNS, G13_LCD_ROWS};
 
@@ -26,24 +27,33 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             .baseline(embedded_graphics::text::Baseline::Middle)
             .build();
 
-        loop {
-            let now = OffsetDateTime::now_utc();
+        let mut x = G13_LCD_COLUMNS as f64 / 2.0;
+        let mut y = G13_LCD_ROWS as f64 / 2.0;
 
+        // 30 fps render loop
+        let mut dt = 0.0;
+        loop {
+            let start = Instant::now();
+            let now = OffsetDateTime::now_utc().to_offset(offset!(+1));
+
+            // Update Logic
+            x += _g13.state.get_x().await * dt * 25.0;
+            y += _g13.state.get_y().await * dt * 25.0;
+
+            // Render
             let string = format!("{:0>2}:{:0>2}:{:0>2}", now.hour(), now.minute(), now.second());
 
             _g13.clear(BinaryColor::Off).unwrap();
-            Text::with_text_style(
-                &string,
-                Point::new(G13_LCD_COLUMNS / 2, G13_LCD_ROWS / 2),
-                character_style,
-                textstyle,
-            )
+            Text::with_text_style(&string, Point::new(x as i32, y as i32), character_style, textstyle)
                 .draw(&mut _g13)
                 .unwrap();
 
             _g13.render().unwrap();
 
-            tokio::time::sleep(Duration::from_secs(1)).await;
+            // Calculate delta time
+            let delta = Instant::now() - start;
+            tokio::time::sleep(Duration::from_millis(33) - delta).await;
+            dt = (Instant::now() - start).as_secs_f64();
         }
     });
 

udev

@@ -1 +0,0 @@
-KERNEL=="usb", ATTRS{idVendor}=="", ATTRS{idProduct}=="", "TAG+="systemd", ENV{SYSTEMD_WANTS}="serialdaemon.service"