src/conf.rs

@@ -21,6 +21,8 @@ pub fn load_config(path: &str) -> Result<Conf, Box<dyn std::error::Error>> {
         .add_source(config::File::with_name(path))
         .build()?;
 
-    let conf : Conf = settings.try_deserialize()?;
+    let conf = settings.try_deserialize::<Conf>()?;
+
+    
     Ok(conf)
 }

src/errors.rs

@@ -1,36 +0,0 @@
-use std::error::Error;
-use std::fmt;
-use redis::RedisError;
-
-#[derive(Debug)]
-pub enum LJError {
-    ConfigFileMissing,
-    RedisConnect(RedisError)
-}
-
-impl fmt::Display for LJError {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-	use LJError::*;
-	
-	match self {
-	    ConfigFileMissing => {
-		write!(f, "first argument must be a TOML config file \
-			   (see copyme.Settings.toml)")
-	    },
-	    RedisConnect(err) => {
-		write!(f, "unable to connect to redis server: {err}")
-	    }
-	}
-    }
-}
-
-impl Error for LJError {
-    fn source(&self) -> Option<&(dyn Error + 'static)> {
-	use LJError::*;
-
-	match self {
-	    ConfigFileMissing => None,
-	    RedisConnect(err) => Some(err)
-	}
-    }
-}

src/lib.rs

@@ -1,3 +1,2 @@
 pub mod conf;
 pub mod redis_ctrl;
-pub mod errors;

src/main.rs

@@ -1,10 +1,9 @@
+mod conf;
 ///
 /// Configure udev:
 /// https://github.com/Grix/helios_dac/blob/master/docs/udev_rules_for_linux.md
 ///
 mod redis_ctrl;
-mod conf;
-mod errors;
 
 use helios_dac::NativeHeliosDacController;
 use helios_dac::{
@@ -16,41 +15,43 @@ use helios_dac::{
 };
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
-use redis_ctrl::{RedisCtrl,Order};
+
 use conf::{load_config, Conf};
-use errors::LJError;
+use redis_ctrl::{Order, RedisCtrl};
 
 const CENTER: (u16, u16) = (2000, 2000);
 
 pub fn main() {
-    match run_all() {
-	Ok(()) => {},
+    let config = match load_config("Settings") {
+        Ok(c) => c,
         Err(err) => {
-	    println!("Error: {}", err);
+            panic!("Unable to load config file: {:?}", err)
         }
-    }
-}
-
-fn run_all() -> Result<(), Box<dyn std::error::Error>> {
-    let Some(filename) = std::env::args().nth(1) else {
-	return Err(Box::new(LJError::ConfigFileMissing));
     };
-    let config = load_config(&filename)?;    
-    let rs = RedisCtrl::new()?;
 
-    run_dac(config, rs)
+    let rs = match RedisCtrl::new() {
+        Ok(rs) => rs,
+        Err(err) => {
+            panic!("Unable to connect to redis: {:?}", err);
+        }
+    };
+
+    match run_dac(config, rs) {
+        Ok(()) => {}
+        Err(err) => {
+            panic!("Error: {:?}", err)
+        }
+    }
 }
 
-fn run_dac(
-    config: Conf,
-    mut rs: RedisCtrl
-) -> Result<(), Box<dyn std::error::Error>> {
+fn run_dac(config: Conf, mut rs: RedisCtrl) -> Result<(), Box<dyn std::error::Error>> {
     let running = Arc::new(AtomicBool::new(true));
     let r = running.clone();
 
     ctrlc::set_handler(move || {
         r.store(false, Ordering::SeqCst);
-    })?;
+    })
+    .expect("Error setting Ctrl-C handler");
 
     let controller = NativeHeliosDacController::new()?;
     let devices = controller.list_devices()?;
@@ -63,16 +64,14 @@ fn run_dac(
     let mut device = device.open()?;
 
     while running.load(Ordering::SeqCst) {
-	let order = rs.get_order(config.laser_id)?;
+        let order = rs.get_order(0)?;
         if order != Order::Draw {
             println!("{:?}", order);
         }
 
-	let frame = get_next_frame(&config, 1000,
-				   &mut rs, order == Order::Black)?;
+        let frame = get_next_frame(1000, &mut rs)?;
 
-	while let Ok(DeviceStatus::NotReady) = device.status() {
-	}
+        while let Ok(DeviceStatus::NotReady) = device.status() {}
         device.write_frame(frame)?;
     }
 
@@ -81,14 +80,8 @@ fn run_dac(
     Ok(())
 }
 
-fn get_next_frame(
-    config: &Conf,
-    speed: u32,
-    rs: &mut RedisCtrl,
-    _black: bool
-) -> Result<Frame, Box<dyn std::error::Error>> {
-    
-    let line = rs.get(&format!("/pl/{}/0", config.laser_id))?;
+fn get_next_frame(speed: u32, rs: &mut RedisCtrl) -> Result<Frame, Box<dyn std::error::Error>> {
+    let line = rs.get("/pl/0/0")?;
     let line: Vec<Point> = line.iter().map(tuple_to_point).collect();
 
     let mut line2 = vec![];
@@ -98,8 +91,6 @@ fn get_next_frame(
         }
     }
 
-    println!("{:?}", line2);
-
     Ok(Frame::new(speed, line2))
 }
 
@@ -110,8 +101,8 @@ fn tuple_to_point(tpl: &(f32, f32, u32)) -> Point {
     let g = ((col >> 8) & 255) as u8;
     let b = (col & 255) as u8;
 
-    let x = CENTER.0 + *x as u16 * 2;
-    let y = CENTER.1 + *y as u16 * 2;
+    let x = CENTER.0 + *x as u16;
+    let y = CENTER.1 + *y as u16;
 
     if x >= 4096 || y >= 4096 {
         println!("WARN: coordinate out of range: {} {}", x, y);

src/redis_ctrl.rs

@@ -1,6 +1,5 @@
 use redis::{Client, Commands, Connection};
 use ron::de::from_str;
-use crate::errors::LJError;
 
 #[repr(u8)]
 #[derive(Debug, PartialEq)]
@@ -36,7 +35,7 @@ impl TryFrom<u8> for Order {
             6 => Intensity,
             7 => Kpps,
             8 => ColorBalance,
-	    _ => unreachable!()
+            _ => panic!("Can't be there"),
         })
     }
 }
@@ -50,10 +49,8 @@ pub struct RedisCtrl {
 
 impl RedisCtrl {
     pub fn new() -> Result<Self, Box<dyn std::error::Error>> {
-        let client = Client::open("redis://127.0.0.1/")
-	    .map_err(| err | LJError::RedisConnect(err))?;
-        let connection = client.get_connection()
-	    .map_err(| err | LJError::RedisConnect(err))?;
+        let client = Client::open("redis://127.0.0.1/")?;
+        let connection = client.get_connection()?;
         Ok(RedisCtrl { client, connection })
     }