From 0b43bd6fe007d726fd6ff9c2c9b4998768fa5696 Mon Sep 17 00:00:00 2001
From: Mikey Sklar <sklarm@sonofsiri.local>
Date: Sat, 18 Nov 2017 18:00:21 -0700
Subject: [PATCH] Ported to CircuitPython, Tested on Gemma M0 and Trinket M0

---
 .../.Larson_Scanner_Shades.ino.swp            | Bin 0 -> 12288 bytes
 .../Larson_Scanner_Shades.ino                 |  41 ++++++++++++++++++
 .../Larson_Scanner_Shades.py                  |  37 ++++++++++++++++
 Larson_Scanner_Shades/README.md               |   4 ++
 4 files changed, 82 insertions(+)
 create mode 100644 Larson_Scanner_Shades/.Larson_Scanner_Shades.ino.swp
 create mode 100644 Larson_Scanner_Shades/Larson_Scanner_Shades.ino
 create mode 100644 Larson_Scanner_Shades/Larson_Scanner_Shades.py
 create mode 100644 Larson_Scanner_Shades/README.md

diff --git a/Larson_Scanner_Shades/.Larson_Scanner_Shades.ino.swp b/Larson_Scanner_Shades/.Larson_Scanner_Shades.ino.swp
new file mode 100644
index 0000000000000000000000000000000000000000..fc5b15b22ab4582b4ee711f52649bc1fc08118f9
GIT binary patch
literal 12288
zcmeI2&u<$=6vwAM0;L76Jv`DwZTYuT)K-Zr(WXsP(hxPGNa0|OcgOMA>zQR|wvJVm
z_MhPhHzXvAIB@5}KLBTX<N${XzO&v$&?Z6RMtLKBH9J4vn>U~L_F#Dj?fV;d>2mXu
zKszVIm!F^AeZKpPc=o9fZj#7s8Wv7&&Kf&(I@8U>Mlv~e^Jfc(tu^H)-lnaAj3#;7
zn(8RC4&6k}`)Ov!D)O!srE@>BrjgnVqxWMu%yRAfn@VOzo4x+d+<7(auje{euC*yM
zMA6@gq%kV%?~LTJvrTR6u_5vT6L>WV<bK$=az-q7JMD163rp|PJ8ysVYTlJ^#RQlD
z6JP>NfC(@GCcp%kz>x%edP+RT%IR{oTK1=2=*uB@On?b60Vco%m;e)C0!)AjFaajO
z1em~okbsPZc>bCY-@cCE@&Et9@Bg3A3h@*41N0R72AV))=o9D;bQ@ZS-h$3Sr=j29
z6yi7ND`*N`hW<Ds#MjUh=nk|2U4`mU4SM#55MMwKpd9)b+JLS?b?7|wE8_bR`X2fY
z3h_RLxG@1Hzyz286JP>NfC(^x{|$jhf+&b6)*1Dvfo`Q3r`BQYe5TW;$*0?TUnQ<m
zr3Q7whDU^<B0a2xjn|IYS*3@CqoW;nf|JsEmD-EV!BwpnLJ6y_7G1Zwi4@u4kd%oX
z9u^S^EDvo~8TT696&kPh5EPATwQ3o#Q@#lJhE1>wZfoN@4k^8Af6<YWPOFT(C6&o=
z6HhWpNSc`9OwLG>Q8Theq2Kr9^;9(%LEV#n6f8&5&_Ll!Vsb{w$-J-)&cf6<cQ6_$
z@=_<1272`nb*vIOuPiTOS<rPOJF6fztd<imMo%^BBL4kOJGAObK(i*Z31uoi(W(=y
zuKdO7u8MU&{RcZD3U;?{EgznCLm7`d7xy6TXprf>kyp;2aD0RQ-SMcf6E2IZ7g2;_
z7#4&NDkIP?0M==yD7NOJNA6S{ay*kh8ikSxY4c?w*Fv7(J8%~jSHyN}2o=*rHvX1}
zD$O(sBuaFOOwU8QwDB}v5f7}6DX})i>+w*CFdHhlN9}s~T6Kz)ZCj_kwx*cHC+c_%
z6}_b9YDtLj8ZPobP<z^hiYOc-ioEoE_znA(vPFF_3~<s*E0wMO=FPR8I&E)k)oJVI
zhyC??*HK5|>4V$5sEJT<7h*NkC~<5;(upn|&MeHS+r=hrq9l(Mt-f?hb97Do2@>+M
AB>(^b

literal 0
HcmV?d00001

diff --git a/Larson_Scanner_Shades/Larson_Scanner_Shades.ino b/Larson_Scanner_Shades/Larson_Scanner_Shades.ino
new file mode 100644
index 000000000..03120e08b
--- /dev/null
+++ b/Larson_Scanner_Shades/Larson_Scanner_Shades.ino
@@ -0,0 +1,41 @@
+#include <Adafruit_NeoPixel.h>
+
+#define N_LEDS 22
+#define PIN     4
+
+Adafruit_NeoPixel strip = Adafruit_NeoPixel(N_LEDS, PIN, NEO_GRB + NEO_KHZ800);
+
+void setup() {
+  strip.begin();
+}
+
+int pos = 0, dir = 1; // Position, direction of "eye"
+
+void loop() {
+  int j;
+
+  // Draw 5 pixels centered on pos.  setPixelColor() will clip any
+  // pixels off the ends of the strip, we don't need to watch for that.
+  strip.setPixelColor(pos - 2, 0x100000); // Dark red
+  strip.setPixelColor(pos - 1, 0x800000); // Medium red
+  strip.setPixelColor(pos    , 0xFF3000); // Center pixel is brightest
+  strip.setPixelColor(pos + 1, 0x800000); // Medium red
+  strip.setPixelColor(pos + 2, 0x100000); // Dark red
+
+  strip.show();
+  delay(30);
+
+  // Rather than being sneaky and erasing just the tail pixel,
+  // it's easier to erase it all and draw a new one next time.
+  for(j=-2; j<= 2; j++) strip.setPixelColor(pos+j, 0);
+
+  // Bounce off ends of strip
+  pos += dir;
+  if(pos < 0) {
+    pos = 1;
+    dir = -dir;
+  } else if(pos >= strip.numPixels()) {
+    pos = strip.numPixels() - 2;
+    dir = -dir;
+  }
+}
diff --git a/Larson_Scanner_Shades/Larson_Scanner_Shades.py b/Larson_Scanner_Shades/Larson_Scanner_Shades.py
new file mode 100644
index 000000000..d04ec761c
--- /dev/null
+++ b/Larson_Scanner_Shades/Larson_Scanner_Shades.py
@@ -0,0 +1,37 @@
+import board
+import neopixel
+import time
+
+numpix = 22         # Number of NeoPixels
+pixpin = board.D1   # Pin where NeoPixels are connected Gemma M0 = D1 | Trinket M0 = D4
+strip  = neopixel.NeoPixel(pixpin, numpix, brightness=1, auto_write=False)
+pos = 0             # position
+direction = 1       # direction of "eye"
+
+while True:
+    strip[pos-2] = ([16,0,0])   # Dark red
+    strip[pos-1] = ([128,0,0])  # Medium red
+    strip[pos]   = ([255,48,0]) # brightest
+    strip[pos+1] = ([128,0,0])  # Medium red
+
+    if ( (pos + 2) < numpix ):
+        strip[pos+2] = ([16,0,0])   # Dark red, do not exceed number of pixels 
+
+    strip.write()
+    time.sleep(0.03)
+
+    # Rather than being sneaky and erasing just the tail pixel,
+    # it's easier to erase it all and draw a new one next time.
+    for j in range(-2, 2):
+        strip[pos+j] = (0,0,0)
+        if ( (pos + 2) < numpix ):
+            strip[pos+2] = (0,0,0)
+
+    # Bounce off ends of strip
+    pos += direction
+    if ( pos < 0 ):
+        pos = 1
+        direction = -direction
+    elif ( pos >= (numpix - 1) ):
+        pos = numpix - 2
+        direction = -direction
diff --git a/Larson_Scanner_Shades/README.md b/Larson_Scanner_Shades/README.md
new file mode 100644
index 000000000..3508cc851
--- /dev/null
+++ b/Larson_Scanner_Shades/README.md
@@ -0,0 +1,4 @@
+# Larson_Scanner_Shades
+
+Code to accompany this tutorial:
+https://learn.adafruit.com/larson-scanner-shades