HAL_ChibiOS: make embed.py work with python3

libraries/AP_HAL_ChibiOS/hwdef/scripts/embed.py

@@ -9,16 +9,17 @@ May 2017
 
 import os
 
+def write_encode(out, s):
+    out.write(s.encode())
+
 def embed_file(out, f, idx):
     '''embed one file'''
-    contents = open(f).read()
-    out.write('''
-// %s
-static const uint8_t ap_romfs_%u[] = {''' % (f, idx))
+    contents = open(f,'rb').read()
+    write_encode(out, 'static const uint8_t ap_romfs_%u[] = {' % idx)
 
-    for c in contents:
-        out.write('%u,' % ord(c))
-    out.write('};\n\n');
+    for c in bytearray(contents):
+        write_encode(out, '%u,' % c)
+    write_encode(out, '};\n\n');
 
 def create_embedded_h(filename, files):
     '''create a ap_romfs_embedded.h file'''
@@ -26,21 +27,21 @@ def create_embedded_h(filename, files):
     this_dir = os.path.realpath(__file__)
     rootdir = os.path.relpath(os.path.join(this_dir, "../../../../.."))
 
-    out = open(filename, "w")
-    out.write('''// generated embedded files for AP_ROMFS\n\n''')
+    out = open(filename, "wb")
+    write_encode(out, '''// generated embedded files for AP_ROMFS\n\n''')
 
     for i in range(len(files)):
         (name, filename) = files[i]
         filename = os.path.join(rootdir, filename)
         embed_file(out, filename, i)
 
-    out.write('''const AP_ROMFS::embedded_file AP_ROMFS::files[] = {\n''')
+    write_encode(out, '''const AP_ROMFS::embedded_file AP_ROMFS::files[] = {\n''')
 
     for i in range(len(files)):
         (name, filename) = files[i]
-        print("Embedding file %s:%s" % (name, filename))
-        out.write('{ "%s", sizeof(ap_romfs_%u), ap_romfs_%u },\n' % (name, i, i))
-    out.write('};\n')
+        print(("Embedding file %s:%s" % (name, filename)).encode())
+        write_encode(out, '{ "%s", sizeof(ap_romfs_%u), ap_romfs_%u },\n' % (name, i, i))
+    write_encode(out, '};\n')
     out.close()
 
 if __name__ == '__main__':