v0.1.0: added max7219 support, added signal handling

max7219.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2017-18 Richard Hull and contributors
+# See LICENSE.rst for details.
+
+
+import re
+import time
+
+from luma.led_matrix.device import max7219
+from luma.core.interface.serial import spi, noop
+from luma.core.render import canvas
+from luma.core.legacy import text
+from luma.core.legacy.font import SIXBYEIGHT_FONT, SIXBYEIGHTTHIN_FONT
+
+class MAX7219:
+    __doublePoint = False
+    __brightness = 1.0  # default to min brightness
+
+    def __init__(self, brightness):
+        self.__brightness = brightness
+        serial = spi(port=0, device=0, gpio=noop())
+        self.__device = max7219(serial, cascaded=4, block_orientation=-90, rotate=0) # last arg is rotate: 0,1,2 or 3)
+
+
+    def Clear(self):
+      with canvas(self.__device) as draw:
+          draw.point((15,2), fill=None)
+
+    def showclock(self,tstr):
+      with canvas(self.__device) as draw:
+        text(draw, (0 ,0), tstr[0] , fill="white", font=SIXBYEIGHTTHIN_FONT)
+        text(draw, (8 ,0), tstr[1] , fill="white", font=SIXBYEIGHTTHIN_FONT)
+        text(draw, (17,0), tstr[3] , fill="white", font=SIXBYEIGHTTHIN_FONT)
+        text(draw, (25,0), tstr[4] , fill="white", font=SIXBYEIGHTTHIN_FONT)
+        if tstr[2]==':':
+            draw.point((15,2), fill="white")
+            draw.point((15,5), fill="white")
+
+
+    def SetBrightnessRaw(self, brightness):
+        """Accepts raw brightness from 0 - 255"""
+        self.__device.contrast(brightness)
+
+    def ShowDoublepoint(self, on):
+        """Show or hide double point divider"""
+        if(self.__doublePoint != on):
+            self.__doublePoint = on
+            draw.point((15,2), fill="white")
+            draw.point((15,5), fill="white")
+
+    def cleanup(self):
+        self.__brightness=0
+
+
+if __name__ == "__main__":
+
+    try:
+        # demo()
+        showclock("01:23")
+        wait=raw_input("enter")
+    except KeyboardInterrupt:
+        pass
+