add brainduino test code

brainduino/main.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+import serial
+from sanelogging import log
+import binascii
+
+class Brainduino(object):
+    def __init__(self):
+        self.inbuffer = bytes()
+
+    def add_bytes(self,bytes):
+        self.inbuffer = self.inbuffer + bytes
+        if self.buffer_contains_line():
+            self.read_and_process_line_from_buffer()
+
+    def buffer_contains_line(self):
+        return self.inbuffer.find(b'\r') != -1
+
+    def process_line(self,line):
+        line = line.decode("UTF-8")
+        if len(line) != 16:
+            # this line is incomplete, skip
+            return
+        log.info("got line: " + line)
+        p = line.strip().split("\t")
+        print(binascii.unhexlify(p[0] + p[1]))
+        print(binascii.unhexlify(p[2] + p[3]))
+
+    def read_and_process_line_from_buffer(self):
+        i = self.inbuffer.find(b'\r')
+        if i < 1:
+            log.error("should not happen")
+            return
+        line = self.inbuffer[0:i+1]
+        self.inbuffer = self.inbuffer[i+1:]
+        self.process_line(line)
+
+def main():
+    e = Brainduino()
+
+    with serial.Serial(
+        '/dev/tty.Alpheratz-SPPDev',
+        115200,
+        timeout=1
+    ) as ser:
+        while True:
+            e.add_bytes(ser.read(16))
+
+
+if __name__ == "__main__":
+    main()