fix gradient steps

pkg/dashboard/dashboard.go

@@ -231,9 +231,15 @@ func (a *App) demoHandler(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
+	steps, err := strconv.ParseInt(r.Form["gradient-steps"][0], 10, 32)
+	if err != nil {
+		a.Logger.Errorw("error processing gradient stpes", "error", err)
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
 
 	a.Array.Brightness = utils.ScaleBrightness(int(brightness), a.Array.MinBrightness, a.Array.MaxBrightness)
-	a.Array.Demo(1, int(delay), 1000)
+	a.Array.Demo(1, int(delay), int(steps))
 
 	http.Redirect(w, r, "/", 302)
 }

pkg/dashboard/templates/dashboard.gohtml

@@ -38,7 +38,7 @@
         id="demo-delay"
         type="number"
         name="delay"
-        value="100"
+        value="10"
         min="0"
         max="10000"
       />
@@ -49,6 +49,7 @@
         type="range"
         min="0"
         max="100"
+        value="100"
         name="brightness"
       />
 
@@ -57,9 +58,9 @@
         id="demo-gradient-steps"
         type="number"
         name="gradient-steps"
-        value="2048"
+        value="100"
         min="10"
-        max="10000"
+        max="2048"
       />
 
       <input type="submit" value="run" id="demo-submit" />

pkg/neopixel/neopixel.go

@@ -201,8 +201,7 @@ func (led *LEDArray) Demo(count int, delay int, gradientLength int) {
 		colorList := color.GradientColorList(demoGradient, gradientLength)
 		for _, gradColor := range colorList {
 			led.Color = gradColor
-			_ = led.Display(0)
-			time.Sleep(time.Duration(delay) * time.Nanosecond)
+			_ = led.Display(delay / 10)
 		}
 	}
 	_ = led.Fade(led.MinBrightness)