fix: make router socket non-blocking to prevent poll loop stalls

sketch/lib/extras/generate_font.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python
+
+# This file is part of the ArduinoGraphics library.
+# Copyright (c) 2018 Arduino SA. All rights reserved.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+import sys;
+
+input = sys.argv[1]
+output = sys.argv[2]
+name = sys.argv[3]
+
+fontWidth = 0
+fontHeight = 0
+fontCharacters = [None] * 256
+fontCharacterNames = [None] * 256
+
+with open(input) as f:
+	charName = ""
+	charEncoding = -1
+	charBitmap = []
+
+	bitmap = False
+
+	for line in f:
+		line = line.rstrip();
+		splitLine= line.split(" ")
+
+		if splitLine[0] == "FONTBOUNDINGBOX":
+			fontWidth = int(splitLine[1])
+			fontHeight = int(splitLine[2])
+		elif splitLine[0] == "STARTCHAR":
+			charName = splitLine[1];
+		elif splitLine[0] == "ENCODING":
+			charEncoding = int(splitLine[1])
+		elif splitLine[0] == "BITMAP":
+			bitmap = True
+			charBitmap = []
+		elif splitLine[0] == "ENDCHAR":
+			if charEncoding <= 255:
+				fontCharacterNames[charEncoding] = charName
+				fontCharacters[charEncoding] = charBitmap
+			charEncoding = -1
+			bitmap = False
+		elif bitmap:
+			charBitmap.append(int(line, 16))
+
+out = open(output, "w")
+
+out.write("#include \"Font.h\"\n")
+out.write("\n")
+out.write("const struct Font %s = {" % ( name ))
+out.write("\n")
+out.write("  %d," % ( fontWidth ))
+out.write("\n")
+out.write("  %d," % ( fontHeight ))
+out.write("\n")
+out.write("  (const uint8_t*[]){\n")
+for c in range (0, 255):
+	if None == fontCharacters[c]:
+		out.write("    NULL,\n")
+	else:
+		out.write("    // %s" % (fontCharacterNames[c]))
+		out.write("\n")
+		out.write("    (const uint8_t[]){\n")
+		for i in range(0, fontHeight):
+			out.write("      0b%s," % ('{0:08b}'.format(fontCharacters[c][i])))
+			out.write("\n")
+		out.write("    },\n")
+out.write("  }\n")
+out.write("};\n")
+
+out.close()