Merge pull request #30 from makermelissa/flicker-fix

Fixed Flicker for Numbers when Autowrite is on

Author: caternuson

adafruit_ht16k33/segments.py

@@ -160,6 +160,8 @@ def print(self, value):
 
     def __setitem__(self, key, value):
         self._put(value, key)
+        if self._auto_write:
+            self.show()
 
     def scroll(self, count=1):
         """Scroll the display by specified number of places."""
@@ -182,8 +184,6 @@ def _put(self, char, index=0):
         character = ord(char) * 2 - 64
         self._set_buffer(index * 2, CHARS[1 + character])
         self._set_buffer(index * 2 + 1, CHARS[character])
-        if self._auto_write:
-            self.show()
 
     def _push(self, char):
         """Scroll the display and add a character at the end."""
@@ -199,6 +199,8 @@ def _text(self, text):
 
     def _number(self, number):
         """Display the specified decimal number."""
+        auto_write = self._auto_write
+        self._auto_write = False
         string = "{}".format(number)
         if len(string) > 4:
             if string.find('.') > 4:
@@ -208,6 +210,7 @@ def _number(self, number):
         if '.' in string:
             places += 1
         self._text(string[:places])
+        self._auto_write = auto_write
 
 class Seg7x4(Seg14x4):
     """Numeric 7-segment display. It has the same methods as the alphanumeric display, but only
@@ -257,8 +260,6 @@ def _put(self, char, index=0):
         else:
             return
         self._set_buffer(index, NUMBERS[character])
-        if self._auto_write:
-            self.show()
 
 class BigSeg7x4(Seg7x4):
     """Numeric 7-segment display. It has the same methods as the alphanumeric display, but only