rename panda to python because of git ambiguity

python/dfu.py

@@ -0,0 +1,122 @@
+from __future__ import print_function
+import os
+import usb1
+import struct
+import time
+
+# *** DFU mode ***
+
+DFU_DNLOAD = 1
+DFU_UPLOAD = 2
+DFU_GETSTATUS = 3
+DFU_CLRSTATUS = 4
+DFU_ABORT = 6
+
+class PandaDFU(object):
+  def __init__(self, dfu_serial):
+    context = usb1.USBContext()
+    for device in context.getDeviceList(skip_on_error=True):
+      if device.getVendorID() == 0x0483 and device.getProductID() == 0xdf11:
+        try:
+          this_dfu_serial = device._getASCIIStringDescriptor(3)
+        except Exception:
+          continue
+        if this_dfu_serial == dfu_serial or dfu_serial is None:
+          self._handle = device.open()
+          self.legacy = "07*128Kg" in self._handle.getASCIIStringDescriptor(4)
+          return
+    raise Exception("failed to open "+dfu_serial)
+
+  @staticmethod
+  def list():
+    context = usb1.USBContext()
+    dfu_serials = []
+    try:
+      for device in context.getDeviceList(skip_on_error=True):
+        if device.getVendorID() == 0x0483 and device.getProductID() == 0xdf11:
+          try:
+            dfu_serials.append(device._getASCIIStringDescriptor(3))
+          except Exception:
+            pass
+    except Exception:
+      pass
+    return dfu_serials
+
+  @staticmethod
+  def st_serial_to_dfu_serial(st):
+    if st == None or st == "none":
+      return None
+    uid_base = struct.unpack("H"*6, st.decode("hex"))
+    return struct.pack("!HHH", uid_base[1] + uid_base[5], uid_base[0] + uid_base[4] + 0xA, uid_base[3]).encode("hex").upper()
+
+
+  def status(self):
+    while 1:
+      dat = str(self._handle.controlRead(0x21, DFU_GETSTATUS, 0, 0, 6))
+      if dat[1] == "\x00":
+        break
+
+  def clear_status(self):
+    # Clear status
+    stat = str(self._handle.controlRead(0x21, DFU_GETSTATUS, 0, 0, 6))
+    if stat[4] == "\x0a":
+      self._handle.controlRead(0x21, DFU_CLRSTATUS, 0, 0, 0)
+    elif stat[4] == "\x09":
+      self._handle.controlWrite(0x21, DFU_ABORT, 0, 0, "")
+      self.status()
+    stat = str(self._handle.controlRead(0x21, DFU_GETSTATUS, 0, 0, 6))
+
+  def erase(self, address):
+    self._handle.controlWrite(0x21, DFU_DNLOAD, 0, 0, "\x41" + struct.pack("I", address))
+    self.status()
+
+  def program(self, address, dat, block_size=None):
+    if block_size == None:
+      block_size = len(dat)
+      
+    # Set Address Pointer
+    self._handle.controlWrite(0x21, DFU_DNLOAD, 0, 0, "\x21" + struct.pack("I", address))
+    self.status()
+
+    # Program
+    dat += "\xFF"*((block_size-len(dat)) % block_size)
+    for i in range(0, len(dat)/block_size):
+      ldat = dat[i*block_size:(i+1)*block_size]
+      print("programming %d with length %d" % (i, len(ldat)))
+      self._handle.controlWrite(0x21, DFU_DNLOAD, 2+i, 0, ldat)
+      self.status()
+
+  def program_bootstub(self, code_bootstub):
+    self.clear_status()
+    self.erase(0x8004000)
+    self.erase(0x8000000)
+    self.program(0x8000000, code_bootstub, 0x800)
+    self.reset()
+
+  def recover(self):
+    from panda import BASEDIR, build_st
+    if self.legacy:
+      fn = "obj/bootstub.comma.bin"
+      print("building legacy bootstub")
+      build_st(fn, "Makefile.legacy")
+    else:
+      fn = "obj/bootstub.panda.bin"
+      print("building panda bootstub")
+      build_st(fn)
+    fn = os.path.join(BASEDIR, "board", fn)
+
+    with open(fn) as f:
+      code = f.read()
+
+    self.program_bootstub(code)
+
+  def reset(self):
+    # **** Reset ****
+    self._handle.controlWrite(0x21, DFU_DNLOAD, 0, 0, "\x21" + struct.pack("I", 0x8000000))
+    self.status()
+    try:
+      self._handle.controlWrite(0x21, DFU_DNLOAD, 2, 0, "")
+      stat = str(self._handle.controlRead(0x21, DFU_GETSTATUS, 0, 0, 6))
+    except Exception:
+      pass
+