Started work on a more usefull display

src/main.rs

@@ -91,7 +91,9 @@ mod app {
         disp_led: gpioa::PA10<Output<PushPull>>,
         disp_cs: gpioa::PA15<Output<PushPull>>,
         disp: ST7735<Spi<SPI1>, gpio::Pin<'A', 12, Output>, gpio::Pin<'A', 11, Output>>,
-        col_pos: u16,
+        row_pos: u16,
+        row_buffer: [Complex<f32>; 128],
+        row_buffer_count: usize,
         max_mag: f32,
 
         encoder: qei::Qei<TIM2>,
@@ -199,7 +201,7 @@ mod app {
 
         disp.init(&mut delay).unwrap();
         disp.set_orientation(&Orientation::Landscape).unwrap();
-        disp.clear(Rgb565::BLUE).unwrap();
+        disp.clear(Rgb565::BLACK).unwrap();
 
         defmt::info!("Display setup done");
 
@@ -307,7 +309,9 @@ mod app {
                 disp_led,
                 disp_cs,
                 disp,
-                col_pos: 0,
+                row_pos: 0,
+                row_buffer: [Complex::<f32>::new(0.0, 0.0); 128],
+                row_buffer_count: 0,
                 max_mag: 0.0,
 
                 encoder,
@@ -317,37 +321,55 @@ mod app {
         )
     }
 
-    #[task(priority = 0, local = [disp, col_pos, max_mag, encoder, last_encoder_pos, carrier_freq, pll, i2c])]
-    async fn update_display(cx: update_display::Context, col: [Complex<f32>; 128]) {
-        for samp in col {
-            let mag = (samp.re.pow(2) as f32 + samp.im.pow(2) as f32).sqrt() as f32;
-            *cx.local.max_mag = if mag > *cx.local.max_mag {
-                mag
-            } else {
-                *cx.local.max_mag
-            };
+    #[task(priority = 0, local = [disp, row_pos, row_buffer, row_buffer_count, max_mag, encoder, last_encoder_pos, carrier_freq, pll, i2c])]
+    async fn update_display(cx: update_display::Context, mut row: [Complex<f32>; 128]) {
+        let buffers_per_row = 4;
+
+        let row = cfft_128(&mut row);
+
+        for idx in 0..row.len() {
+            cx.local.row_buffer[idx] += row[idx] / buffers_per_row as f32;
         }
 
-        let gradient = colorous::TURBO;
+        *cx.local.row_buffer_count += 1;
 
-        for idx in 0..128 {
-            let norm_intens = (col[idx].re.pow(2) + col[idx].im.pow(2)) / *cx.local.max_mag;
-            let color = gradient.eval_continuous(norm_intens as f64);
+        if *cx.local.row_buffer_count > buffers_per_row {
+            *cx.local.row_buffer_count = 0;
 
-            let y = if idx < 64 { 64 + idx } else { idx - 64 };
-            Pixel(
-                Point::new(*cx.local.col_pos as i32, y as i32),
-                Rgb565::new(color.r >> 3, color.g >> 2, color.b >> 3),
-            )
-            .draw(cx.local.disp)
-            .unwrap();
+            for samp in cx.local.row_buffer.iter() {
+                let mag = (samp.re.pow(2) as f32 + samp.im.pow(2) as f32).sqrt() as f32;
+                *cx.local.max_mag = if mag > *cx.local.max_mag {
+                    mag
+                } else {
+                    *cx.local.max_mag
+                };
+            }
+
+            let gradient = colorous::TURBO;
+
+            for idx in 0..128 {
+                let norm_intens = (cx.local.row_buffer[idx].re.pow(2)
+                    + cx.local.row_buffer[idx].im.pow(2))
+                    / *cx.local.max_mag;
+                let color = gradient.eval_continuous(norm_intens as f64);
+
+                let x = if idx < 64 { 64 + idx } else { idx - 64 };
+                Pixel(
+                    Point::new(32 + x as i32, 28 + *cx.local.row_pos as i32),
+                    Rgb565::new(color.r >> 3, color.g >> 2, color.b >> 3),
+                )
+                .draw(cx.local.disp)
+                .unwrap();
+
+                cx.local.row_buffer[idx] = Complex::new(0.0, 0.0);
+            }
+
+            *cx.local.row_pos = (*cx.local.row_pos + 1) % 100;
+            *cx.local.max_mag *= 0.999;
+
+            defmt::info!("Position is {}", cx.local.row_pos);
         }
 
-        *cx.local.col_pos = (*cx.local.col_pos + 1) % 160;
-        *cx.local.max_mag *= 0.999;
-
-        defmt::info!("Position is {}", cx.local.col_pos);
-
         let encoder_pos = cx.local.encoder.count();
         let diff = encoder_pos.wrapping_sub(*cx.local.last_encoder_pos) as i32;
 
@@ -405,8 +427,8 @@ mod app {
         cx.shared.audio_buffer.lock(|buffer| {
             let audio_buffer = buffer.take().unwrap();
             for idx in 0..samples.len() {
-                let filtered = usb_filter.compute(samples[idx]);
-                //let filtered = usb_filter.compute(Complex::new(samples[idx].im, samples[idx].re));
+                //let filtered = usb_filter.compute(samples[idx]);
+                let filtered = usb_filter.compute(Complex::new(samples[idx].im, samples[idx].re));
                 fft_input[idx] = samples[idx];
 
                 audio_buffer[idx] = ((filtered.re * (audio_max_duty as f32)) * 3.0f32) as u16;
@@ -415,9 +437,7 @@ mod app {
             *buffer = Some(audio_buffer);
         });
 
-        let spectrum = cfft_128(&mut fft_input);
-
-        update_display::spawn(spectrum.clone()).unwrap();
+        update_display::spawn(fft_input).unwrap();
 
         *cx.local.iq_buffer = Some(buffer);
     }