On macOS, flush serial buffer regularly to avoid bitmap corruption

Author: mathoudebine

library/lcd/lcd_comm.py

@@ -19,6 +19,7 @@
 import copy
 import math
 import os
+import platform
 import queue
 import sys
 import threading
@@ -139,6 +140,10 @@ def SendLine(self, line: bytes):
     def WriteLine(self, line: bytes):
         try:
             self.serial_write(line)
+            if platform.system() == "Darwin":
+                # macOS needs the serial buffer to be flushed regularly to avoid bitmap corruption on the display
+                # See https://github.com/mathoudebine/turing-smart-screen-python/issues/7
+                self.lcd_serial.flush()
         except serial.SerialTimeoutException:
             # We timed-out trying to write to our device, slow things down.
             logger.warning("(Write line) Too fast! Slow down!")