add PandaSerial and location panda (aka pigeon) test

python/__init__.py

@@ -12,6 +12,7 @@ from dfu import PandaDFU
 from esptool import ESPROM, CesantaFlasher
 from flash_release import flash_release
 from update import ensure_st_up_to_date
+from serial import PandaSerial
 
 __version__ = '0.0.6'
 

python/serial.py

@@ -0,0 +1,26 @@
+# mimic a python serial port
+class PandaSerial(object):
+  def __init__(self, panda, port, baud):
+    self.panda = panda
+    self.port = port
+    self.panda.set_uart_parity(self.port, 0)
+    self.panda.set_uart_baud(self.port, baud)
+    self.buf = ""
+
+  def read(self, l=1):
+    tt = self.panda.serial_read(self.port)
+    if len(tt) > 0:
+      #print "R: ", tt.encode("hex")
+      self.buf += tt
+    ret = self.buf[0:l]
+    self.buf = self.buf[l:]
+    return ret
+
+  def write(self, dat):
+    #print "W: ", dat.encode("hex")
+    return self.panda.serial_write(self.port, dat)
+
+  def close(self):
+    pass
+
+