update neopixel to enw numbering

demo_adc_lightnings.py

@@ -21,7 +21,7 @@ def capture(tr):
     print("Capture! ")
     print(data)
     np.save("lightning-%s"%now.isoformat(), data)
-    led.pulse_ms(250, confirm=False)
+    led.pulse_ms(1000, confirm=False)
 
 with gex.Client(gex.TrxRawUSB()) as client:
     adc = gex.ADC(client, 'adc')

demo_neo2.py

@@ -4,12 +4,12 @@ import time
 
 with gex.Client(gex.TrxRawUSB()) as client:
     # Neopixel strip
-    strip = gex.Neopixel(client, 'neo')
+    strip = gex.Neopixel(client, 'npx')
     # Load RGB to the strip
     strip.load([0xFF0000, 0xFFFF00, 0x00FF00, 0x0000FF, 0xFF00FF])
     
     for i in range(0,255):
         strip.load([0xFF0000+i, 0xFFFF00, 0x00FF00, 0x0000FF, 0xFF00FF])
-        time.sleep(0.001)
+        time.sleep(0.01)
         
     strip.clear()

demo_neo3.py

@@ -0,0 +1,39 @@
+#!/bin/env python3
+import gex
+import time
+
+# this shows a spinny animation on a 30-pixel strip forming a circle
+
+def draw_comet(buf, index):
+    r = 0xFF
+    g = 0x22
+    b = 0x00
+    steps = 5
+    fades = [0.05, 1, 0.5, 0.1, 0.05]
+
+    for i in range(steps):
+        fade = fades[i]
+        buf[(len(buf) + index - i)%len(buf)] = \
+            round(r * fade)<<16 | \
+            round(g * fade)<<8 | \
+            round(b * fade)
+
+with gex.Client(gex.TrxRawUSB()) as client:
+    # Neopixel strip
+    strip = gex.Neopixel(client, 'npx')
+
+    markers = [0, 15]
+    for i in range(1000):
+        buf = [0]*30
+        for j in range(len(markers)):
+            n = markers[j]
+
+            draw_comet(buf, n)
+
+            n = n + 1 if n < len(buf)-1 else 0
+            markers[j] = n
+
+        strip.load(buf)
+        time.sleep(0.02)
+        
+    strip.clear()

gex/units/Neopixel.py

@@ -10,7 +10,7 @@ class Neopixel(gex.Unit):
 
     def get_len(self):
         """ Get the neopixel strip length """
-        resp = self._query(0x04)
+        resp = self._query(10)
         pp = gex.PayloadParser(resp)
         return pp.u16()
 
@@ -24,10 +24,10 @@ class Neopixel(gex.Unit):
         pb = gex.PayloadBuilder(endian='big' if reverse else 'little')
         for c in colors:
             pb.u24(c)
-        self._send(0x01, pb.close(), confirm=confirm)
+        self._send(1, pb.close(), confirm=confirm)
 
     def clear(self, confirm=True):
         """
         Reset the strip (set all to black)
         """
-        self._send(0x00, confirm=confirm)
+        self._send(0, confirm=confirm)