Squashed 'panda/' content from commit ae816c104

git-subtree-dir: panda
git-subtree-split: ae816c104a99a8cd4d508ccd6abdc7b93053529c

board/tools/enter_download_mode.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python
+from __future__ import print_function
+
+import sys
+import time
+import usb1
+
+def enter_download_mode(device):
+  handle = device.open()
+  handle.claimInterface(0)
+
+  try:
+    handle.controlWrite(usb1.TYPE_VENDOR | usb1.RECIPIENT_DEVICE, 0xd1, 0, 0, b'')
+  except (usb1.USBErrorIO, usb1.USBErrorPipe) as e:
+    print("Device download mode enabled.")
+    time.sleep(1)
+  else:
+    print("Device failed to enter download mode.")
+    sys.exit(1)
+
+def find_first_panda(context=None):
+  context = context or usb1.USBContext()
+  for device in context.getDeviceList(skip_on_error=True):
+    if device.getVendorID() == 0xbbaa and device.getProductID()&0xFF00 == 0xdd00:
+      return device
+
+if __name__ == "__main__":
+  panda_dev = find_first_panda()
+  if panda_dev == None:
+    print("no device found")
+    sys.exit(0)
+  print("found device")
+  enter_download_mode(panda_dev)