mirror of
https://github.com/infiniteCable2/panda.git
synced 2026-02-19 01:33:52 +08:00
119 lines
3.9 KiB
Python
119 lines
3.9 KiB
Python
import usb1
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import struct
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import binascii
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from .constants import McuType
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# *** DFU mode ***
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DFU_DNLOAD = 1
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DFU_UPLOAD = 2
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DFU_GETSTATUS = 3
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DFU_CLRSTATUS = 4
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DFU_ABORT = 6
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class PandaDFU:
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def __init__(self, dfu_serial):
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self._handle = None
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context = usb1.USBContext()
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for device in context.getDeviceList(skip_on_error=True):
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if device.getVendorID() == 0x0483 and device.getProductID() == 0xdf11:
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try:
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this_dfu_serial = device.open().getASCIIStringDescriptor(3)
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except Exception:
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continue
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if this_dfu_serial == dfu_serial or dfu_serial is None:
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self._handle = device.open()
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self._mcu_type = self.get_mcu_type(device)
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break
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if self._handle is None:
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raise Exception(f"failed to open DFU device {dfu_serial}")
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@staticmethod
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def list():
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context = usb1.USBContext()
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dfu_serials = []
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try:
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for device in context.getDeviceList(skip_on_error=True):
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if device.getVendorID() == 0x0483 and device.getProductID() == 0xdf11:
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try:
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dfu_serials.append(device.open().getASCIIStringDescriptor(3))
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except Exception:
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pass
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except Exception:
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pass
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return dfu_serials
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@staticmethod
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def st_serial_to_dfu_serial(st, mcu_type=McuType.F4):
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if st is None or st == "none":
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return None
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uid_base = struct.unpack("H" * 6, bytes.fromhex(st))
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if mcu_type == McuType.H7:
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return binascii.hexlify(struct.pack("!HHH", uid_base[1] + uid_base[5], uid_base[0] + uid_base[4], uid_base[3])).upper().decode("utf-8")
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else:
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return binascii.hexlify(struct.pack("!HHH", uid_base[1] + uid_base[5], uid_base[0] + uid_base[4] + 0xA, uid_base[3])).upper().decode("utf-8")
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def get_mcu_type(self, dev) -> McuType:
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# TODO: Find a way to detect F4 vs F2
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# TODO: also check F4 BCD, don't assume in else
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return McuType.H7 if dev.getbcdDevice() == 512 else McuType.F4
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def status(self):
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while 1:
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dat = self._handle.controlRead(0x21, DFU_GETSTATUS, 0, 0, 6)
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if dat[1] == 0:
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break
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def clear_status(self):
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# Clear status
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stat = self._handle.controlRead(0x21, DFU_GETSTATUS, 0, 0, 6)
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if stat[4] == 0xa:
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self._handle.controlRead(0x21, DFU_CLRSTATUS, 0, 0, 0)
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elif stat[4] == 0x9:
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self._handle.controlWrite(0x21, DFU_ABORT, 0, 0, b"")
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self.status()
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stat = str(self._handle.controlRead(0x21, DFU_GETSTATUS, 0, 0, 6))
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def erase(self, address):
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self._handle.controlWrite(0x21, DFU_DNLOAD, 0, 0, b"\x41" + struct.pack("I", address))
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self.status()
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def program(self, address, dat, block_size=None):
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if block_size is None:
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block_size = len(dat)
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# Set Address Pointer
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self._handle.controlWrite(0x21, DFU_DNLOAD, 0, 0, b"\x21" + struct.pack("I", address))
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self.status()
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# Program
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dat += b"\xFF" * ((block_size - len(dat)) % block_size)
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for i in range(0, len(dat) // block_size):
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ldat = dat[i * block_size:(i + 1) * block_size]
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print("programming %d with length %d" % (i, len(ldat)))
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self._handle.controlWrite(0x21, DFU_DNLOAD, 2 + i, 0, ldat)
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self.status()
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def program_bootstub(self, code_bootstub):
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self.clear_status()
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self.erase(self._mcu_type.config.bootstub_address)
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self.erase(self._mcu_type.config.app_address)
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self.program(self._mcu_type.config.bootstub_address, code_bootstub, self._mcu_type.config.block_size)
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self.reset()
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def recover(self):
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with open(self._mcu_type.config.bootstub_path, "rb") as f:
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code = f.read()
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self.program_bootstub(code)
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def reset(self):
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self._handle.controlWrite(0x21, DFU_DNLOAD, 0, 0, b"\x21" + struct.pack("I", self._mcu_type.config.bootstub_address))
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self.status()
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try:
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self._handle.controlWrite(0x21, DFU_DNLOAD, 2, 0, b"")
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_ = str(self._handle.controlRead(0x21, DFU_GETSTATUS, 0, 0, 6))
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except Exception:
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pass
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