Create Adafruit_16x8.py

Created a python script for the Adafruit 16x8 LED backpack.

Author: bwshockley

Adafruit_LEDBackpack/Adafruit_16x8.py

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+#!/usr/bin/python
+
+import time
+import datetime
+from Adafruit_LEDBackpack import LEDBackpack
+
+# ===========================================================================
+# 16x8 Pixel Display
+# ===========================================================================
+
+class SixteenByEight:
+  disp = None
+
+  # Constructor
+  def __init__(self, address=0x70, debug=False):
+    if (debug):
+      print "Initializing a new instance of LEDBackpack at 0x%02X" % address
+    self.disp = LEDBackpack(address=address, debug=debug)
+
+  def writeRowRaw(self, charNumber, value):
+    "Sets a row of pixels using a raw 16-bit value"
+    if (charNumber > 7):
+      return
+    # Set the appropriate row
+    self.disp.setBufferRow(charNumber, value)
+
+  def clearPixel(self, x, y):
+    "A wrapper function to clear pixels (purely cosmetic)"
+    self.setPixel(x, y, 0)
+
+  def setPixel(self, x, y, color=1):
+    "Sets a single pixel"
+    if (x >= 16):
+      return
+    if (y >= 8):
+      return    
+    x += 16   # ATTN: This might be a bug?  On the color matrix, this causes x=0 to draw on the last line instead of the first.
+    x %= 16
+    # Set the appropriate pixel
+    buffer = self.disp.getBuffer()
+    if (color):
+      self.disp.setBufferRow(y, buffer[y] | 1 << x)
+    else:
+      self.disp.setBufferRow(y, buffer[y] & ~(1 << x))
+
+  def clear(self):
+    "Clears the entire display"
+    self.disp.clear()