implement new patterns

src/bluetooth.rs

@@ -33,8 +33,7 @@ async fn bluetooth_scan(tx: mpsc::Sender<Device>, adapter: Adapter, uuid: Uuid)
     let mut already_scanned: HashSet<Address> = HashSet::new();
     pin_mut!(discover);
     while let Some(evt) = discover.next().await {
-        match evt {
-            AdapterEvent::DeviceAdded(addr) => {
+        if let AdapterEvent::DeviceAdded(addr) = evt {
                 if already_scanned.contains(&addr) {
                     continue;
                 }
@@ -50,8 +49,6 @@ async fn bluetooth_scan(tx: mpsc::Sender<Device>, adapter: Adapter, uuid: Uuid)
                     Err(_) => continue,
                 }
             }
-            _ => {}
-        }
     }
     Ok(())
 }

src/main.rs

@@ -1,13 +1,12 @@
 mod bluetooth;
 mod patterns;
 
-use crate::patterns::PixelColor;
+use crate::patterns::{ColorWipe, Fade, PixelColor, Rainbow};
 use bluer::gatt::remote::Characteristic;
 use patterns::Strip;
 use std::convert::TryFrom;
 use std::time::Duration;
 use tokio::sync::watch;
-use tokio::sync::watch::error::SendError;
 
 const SERVICE_UUID: bluer::Uuid = bluer::Uuid::from_u128(0xadaf0900c33242a893bd25e905756cb8);
 const PIXEL_DATA_UUID: bluer::Uuid = bluer::Uuid::from_u128(0xadaf0903c33242a893bd25e905756cb8);
@@ -30,9 +29,9 @@ async fn main() -> bluer::Result<()> {
         })
     }
 
-    let strip = Strip::<STRIP_SIZE> {
-        strip: <[PixelColor; 25]>::try_from(pixels).unwrap(),
-    };
+    // let strip = Strip::<STRIP_SIZE> {
+    //     strip: <[PixelColor; 25]>::try_from(pixels).unwrap(),
+    // };
 
     let (tx, rx) = watch::channel(Strip::<STRIP_SIZE>::default());
 
@@ -44,28 +43,58 @@ async fn main() -> bluer::Result<()> {
             tokio::spawn(async move {
                 println!("device connected : {}", &device.address());
                 while rx_device.changed().await.is_ok() {
-                    println!("ok");
-                    let strip = rx_device.borrow().clone();
+                    let strip = *rx_device.borrow();
                     write_strip(&strip, &char).await.unwrap();
                 }
             });
         }
     }
-    loop {
-        match tx.send(strip) {
-            Ok(_) => {}
-            Err(_) => {
+
+    let mut colorwipe = ColorWipe::<25>{
+        current_iteration: 0,
+        color: PixelColor {
+            red: 0,
+            green: 255,
+            blue: 0
+        },
+        infinite: true
+    };
+
+
+    let mut fade = Fade::<25> {
+        current_iteration: 0,
+        nbr_iterations: 25,
+        begin_color: PixelColor {
+            red: 255,
+            green: 0,
+            blue: 0
+        },
+        end_color: PixelColor {
+            red: 0,
+            green: 0,
+            blue: 255
+        },
+    };
+
+    let mut pattern = Rainbow::<25>{
+        current_iteration: 0,
+        max_iteration: None,
+        step: Some(10),
+    };
+
+    let mut strip = fade.next().unwrap();
+
+    while tx.send(strip).is_ok()  {
+        if let Some(value) = fade.next() {
+            strip = value;
+        } else {
             break;
         }
+        tokio::time::sleep(Duration::from_millis(200)).await;
     }
-        tokio::time::sleep(Duration::from_secs(1)).await;
-        match tx.send(Strip::<STRIP_SIZE>::default()) {
-            Ok(_) => {}
-            Err(_) => {
-                break;
-            }
-        }
-        tokio::time::sleep(Duration::from_secs(1)).await;
+
+    while tx.send(pattern.next().unwrap()).is_ok()  {
+        tokio::time::sleep(Duration::from_millis(10)).await;
     }
     Ok(())
 }
@@ -96,7 +125,7 @@ pub async fn write_strip<const N: usize>(
     char: &Characteristic,
 ) -> bluer::Result<()> {
     let frame = [BASE_STRIP_DATA.to_vec(), data.to_array()].concat();
-    print!("{:?}", frame);
+    // print!("{:?}", frame);
     char.write(&*frame).await?;
     Ok(())
 }

src/patterns.rs

@@ -1,6 +1,6 @@
 use std::fmt;
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, Default)]
 pub struct PixelColor {
     pub(crate) red: u8,
     pub(crate) green: u8,
@@ -19,34 +19,28 @@ impl fmt::Display for PixelColor {
     }
 }
 
-impl Default for PixelColor {
-    fn default() -> Self {
-        PixelColor {
-            red: 0,
-            green: 0,
-            blue: 0,
-        }
-    }
-}
-
 #[derive(Copy, Clone)]
 pub struct Strip<const N: usize> {
     pub strip: [PixelColor; N],
 }
 
 impl<const N: usize> Strip<N> {
-    pub fn to_array(&self) -> Vec<u8> {
+    pub fn to_array(self) -> Vec<u8> {
         let mut data: Vec<u8> = vec![];
 
         for i in 0..N {
             data.append(&mut vec![
-                self.strip[i].red,
                 self.strip[i].green,
+                self.strip[i].red,
                 self.strip[i].blue,
             ]);
         }
         data
     }
+
+    pub fn fill(&mut self, color: PixelColor) {
+        self.strip = [color; N];
+    }
 }
 
 impl<const N: usize> Default for Strip<N> {
@@ -57,12 +51,15 @@ impl<const N: usize> Default for Strip<N> {
     }
 }
 
-pub struct RainbowPattern<const N: usize> {
+/// Rainbow pattern /////////////////////////////////////////////////
+
+pub struct Rainbow<const N: usize> {
     pub(crate) current_iteration: usize,
     pub(crate) max_iteration: Option<usize>,
+    pub(crate) step: Option<usize>,
 }
 
-impl<const N: usize> Iterator for RainbowPattern<N> {
+impl<const N: usize> Iterator for Rainbow<N> {
     type Item = Strip<N>;
 
     fn next(&mut self) -> Option<Self::Item> {
@@ -72,12 +69,12 @@ impl<const N: usize> Iterator for RainbowPattern<N> {
             }
         }
         let mut strip = Strip::default();
-        let step = 255 / N;
+        let step = self.step.unwrap_or( 255 / N );
         for i in 0..N {
             let pos = (i * step + self.current_iteration) as u8;
             strip.strip[i] = wheel(pos)
         }
-        self.current_iteration = self.current_iteration + 1;
+        self.current_iteration += 1;
         Some(strip)
     }
 }
@@ -100,11 +97,84 @@ fn wheel(index: u8) -> PixelColor {
         }
         _ => {
             let pos = pos - 170;
-            return PixelColor {
+            PixelColor {
                 red: pos * 3,
                 green: 255 - (pos * 3),
                 blue: 0,
+            }
+        }
+    }
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+/// Colorwipe pattern ////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////
+
+pub struct  ColorWipe<const N: usize> {
+    pub(crate) current_iteration: usize,
+    pub (crate) color: PixelColor,
+    pub (crate) infinite: bool,
+}
+
+impl<const N: usize> Iterator for ColorWipe<N> {
+    type Item = Strip<N>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let mut strip = Strip::default();
+        if self.infinite {
+            self.current_iteration %= N;
+        } else if self.current_iteration >= N {
+                return  None;
+        }
+
+
+        for i in 0..self.current_iteration {
+            strip.strip[i] = self.color;
+        }
+        self.current_iteration += 1;
+        Some(strip)
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////
+/// fade pattern ////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////
+
+pub struct Fade<const N: usize> {
+    pub(crate) current_iteration: usize,
+    pub(crate) nbr_iterations: usize,
+    pub(crate) begin_color: PixelColor,
+    pub(crate) end_color: PixelColor,
+}
+
+fn fadeValue(value_start: u8, value_end: u8, index: usize, nbr_iter: usize) -> u8 {
+    ((value_start as usize * (nbr_iter - index)  + value_end as usize * index )/ nbr_iter) as u8
+}
+
+impl<const N: usize> Iterator for Fade<N> {
+    type Item = Strip<N>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let mut strip = Strip::default();
+
+        if self.current_iteration >= self.nbr_iterations {
+            return  None;
+        }
+
+        let red = fadeValue(self.begin_color.red, self.end_color.red, self.current_iteration, self.nbr_iterations);
+        let green = fadeValue(self.begin_color.green, self.end_color.green, self.current_iteration, self.nbr_iterations);
+        let blue = fadeValue(self.begin_color.blue, self.end_color.blue, self.current_iteration, self.nbr_iterations);
+
+        let current_color = PixelColor {
+            red,
+            green,
+            blue
         };
-        }
+
+        strip.fill(current_color);
+
+        self.current_iteration += 1;
+        Some(strip)
     }
 }