--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ht16k33.py	Thu May 05 13:48:24 2016 +0200
@@ -0,0 +1,72 @@
+HT16K33_BLINK_CMD = const(0x80)
+HT16K33_BLINK_DISPLAYON = const(0x01)
+HT16K33_CMD_BRIGHTNESS = const(0xE0)
+HT16K33_OSCILATOR_ON = const(0x21)
+
+
+class Matrix:
+    def __init__(self, i2c, address=0x70):
+        self.i2c = i2c
+        self.address = address
+        self.temp = bytearray(1)
+        self.buffer = bytearray(16)
+        self.fill(0)
+        self.write_cmd(HT16K33_OSCILATOR_ON)
+        self.blink_rate(0)
+        self.brightness(15)
+
+    def write_cmd(self, byte):
+        self.temp[0] = byte
+        self.i2c.writeto(self.address, self.temp)
+
+    def blink_rate(self, rate=None):
+        if rate is None:
+            return self._blink_rate
+        rate = rate & 0x02
+        self._blink_rate = rate
+        self.write_cmd(HT16K33_BLINK_CMD | HT16K33_BLINK_DISPLAYON | rate << 1)
+
+    def brightness(self, brightness):
+        if brightness is None:
+            return self._brightness
+        brightness = brightness & 0x0F
+        self._brightness = brightness
+        self.write_cmd(HT16K33_CMD_BRIGHTNESS | brightness)
+
+    def show(self):
+        self.i2c.writeto_mem(self.address, 0x00, self.buffer)
+
+    def fill(self, color):
+        fill = 0xff if color else 0x00
+        for i in range(16):
+            self.buffer[i] = fill
+
+    def pixel(self, x, y, color=None):
+        mask = 1 << x
+        if color is None:
+            return bool((self.buffer[y] | self.buffer[y + 1] << 8) & mask)
+        if color:
+            self.buffer[y * 2] |= mask & 0xff
+            self.buffer[y * 2 + 1] |= mask >> 8
+        else:
+            self.buffer[y * 2] &= ~(mask & 0xff)
+            self.buffer[y * 2 + 1] &= ~(mask >> 8)
+
+
+class Matrix8x16(Matrix):
+    def pixel(self, x, y, color=None):
+        if not 0 <= x <= 15:
+            return
+        if not 0 <= y <= 8:
+            return
+        return super().pixel(x, y, color)
+
+
+class Matrix8x8(Matrix):
+    def pixel(self, x, y, color=None):
+        if not 0 <= x <= 8:
+            return
+        if not 0 <= y <= 8:
+            return
+        x = (x - 1) % 8
+        return super().pixel(x, y, color)