Seperate serial thread

config.py

@@ -4,6 +4,8 @@ ScreenX = 24
 #height
 ScreenY = 40
 
+Serial = "/dev/ttyACM0"
+
 # first app is always running in IDLE    
 Apps = [
     {"name": "pixelflut", "cmd": "apps/idle.py", "permanent": True},

main.py

@@ -5,6 +5,26 @@ import serial
 import threading
 import json
 from bottle import route, run
+import time
+
+class SerialWriter(threading.Thread):
+    def __init__(self):
+        super().__init__()
+        self.lock = threading.Lock()
+        self.data = b"\x00"*config.ScreenX*config.ScreenY*3
+
+    def setData(self, data):
+        with self.lock:
+            self.data = data
+        pass
+    
+    def run(self):
+        ser = serial.Serial(config.Serial)
+        while True:
+            ser.write(b"\01")
+            ser.write(self.data)
+            time.sleep(1/120)
+
 
 
 
@@ -16,6 +36,8 @@ class AppRunner(threading.Thread):
         self.app = None
         self.lock = threading.Lock()
         self.param = ""
+        self.serial = SerialWriter()
+        self.serial.start()
 
     def requestApp(self, app, param=""):
         with self.lock:
@@ -41,8 +63,9 @@ class AppRunner(threading.Thread):
             oshandle = d.fileno()
             data = os.read(oshandle, config.ScreenX*config.ScreenY*3)
             # data = d.raw.read(config.ScreenX*config.ScreenY*3)
-            ser.write(b"\01")
+            #ser.write(b"\01")
-            ser.write(data)
+            #ser.write(data)
+            self.serial.setData(data)
 
 
 runner = AppRunner()