1 files changed, 50 insertions, 0 deletions
diff --git a/extra/tigertool/ecusb/tiny_servod.py b/extra/tigertool/ecusb/tiny_servod.py
new file mode 100644
index 0000000000..aec87995a4
--- /dev/null
+++ b/extra/tigertool/ecusb/tiny_servod.py
@@ -0,0 +1,50 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Helper class to facilitate communication to servo ec console."""
+
+from ecusb import pty_driver
+from ecusb import stm32uart
+
+
+class TinyServod(object):
+  """Helper class to wrap a pty_driver with interface."""
+
+  def __init__(self, vid, pid, interface, serialname=None, debug=False):
+    """Build the driver and interface.
+
+    Args:
+      vid: servo device vid
+      pid: servo device pid
+      interface: which usb interface the servo console is on
+      serialname: the servo device serial (if available)
+    """
+    self._vid = vid
+    self._pid = pid
+    self._interface = interface
+    self._serial = serialname
+    self._debug = debug
+    self._init()
+
+  def _init(self):
+    self.suart = stm32uart.Suart(vendor=self._vid,
+                                 product=self._pid,
+                                 interface=self._interface,
+                                 serialname=self._serial,
+                                 debuglog=self._debug)
+    self.suart.run()
+    self.pty = pty_driver.ptyDriver(self.suart, [])
+
+  def reinitialize(self):
+    """Reinitialize the connect after a reset/disconnect/etc."""
+    self.close()
+    self._init()
+
+  def close(self):
+    """Close out the connection and release resources.
+
+    Note: if another TinyServod process or servod itself needs the same device
+          it's necessary to call this to ensure the usb device is available.
+    """
+    self.suart.close()