panda/python/__init__.py

920 lines
29 KiB
Python

# python library to interface with panda
import os
import sys
import time
import usb1
import struct
import hashlib
import binascii
import datetime
import warnings
import logging
from functools import wraps
from typing import Optional
from itertools import accumulate
from .constants import McuType
from .dfu import PandaDFU
from .isotp import isotp_send, isotp_recv
from .spi import PandaSpiHandle, PandaSpiException
from .usb import PandaUsbHandle
__version__ = '0.0.10'
# setup logging
LOGLEVEL = os.environ.get('LOGLEVEL', 'INFO').upper()
logging.basicConfig(level=LOGLEVEL, format='%(message)s')
USBPACKET_MAX_SIZE = 0x40
CANPACKET_HEAD_SIZE = 0x6
DLC_TO_LEN = [0, 1, 2, 3, 4, 5, 6, 7, 8, 12, 16, 20, 24, 32, 48, 64]
LEN_TO_DLC = {length: dlc for (dlc, length) in enumerate(DLC_TO_LEN)}
def calculate_checksum(data):
res = 0
for b in data:
res ^= b
return res
def pack_can_buffer(arr):
snds = [b'']
for address, _, dat, bus in arr:
assert len(dat) in LEN_TO_DLC
#logging.debug(" W 0x%x: 0x%s", address, dat.hex())
extended = 1 if address >= 0x800 else 0
data_len_code = LEN_TO_DLC[len(dat)]
header = bytearray(CANPACKET_HEAD_SIZE)
word_4b = address << 3 | extended << 2
header[0] = (data_len_code << 4) | (bus << 1)
header[1] = word_4b & 0xFF
header[2] = (word_4b >> 8) & 0xFF
header[3] = (word_4b >> 16) & 0xFF
header[4] = (word_4b >> 24) & 0xFF
header[5] = calculate_checksum(header[:5] + dat)
snds[-1] += header + dat
if len(snds[-1]) > 256: # Limit chunks to 256 bytes
snds.append(b'')
return snds
def unpack_can_buffer(dat):
ret = []
while len(dat) >= CANPACKET_HEAD_SIZE:
data_len = DLC_TO_LEN[(dat[0]>>4)]
header = dat[:CANPACKET_HEAD_SIZE]
bus = (header[0] >> 1) & 0x7
address = (header[4] << 24 | header[3] << 16 | header[2] << 8 | header[1]) >> 3
if (header[1] >> 1) & 0x1:
# returned
bus += 128
if header[1] & 0x1:
# rejected
bus += 192
# we need more from the next transfer
if data_len > len(dat) - CANPACKET_HEAD_SIZE:
break
assert calculate_checksum(dat[:(CANPACKET_HEAD_SIZE+data_len)]) == 0, "CAN packet checksum incorrect"
data = dat[CANPACKET_HEAD_SIZE:(CANPACKET_HEAD_SIZE+data_len)]
dat = dat[(CANPACKET_HEAD_SIZE+data_len):]
ret.append((address, 0, data, bus))
return (ret, dat)
def ensure_health_packet_version(fn):
@wraps(fn)
def wrapper(self, *args, **kwargs):
if self.health_version < self.HEALTH_PACKET_VERSION:
raise RuntimeError("Panda firmware has outdated health packet definition. Reflash panda firmware.")
elif self.health_version > self.HEALTH_PACKET_VERSION:
raise RuntimeError("Panda python library has outdated health packet definition. Update panda python library.")
return fn(self, *args, **kwargs)
return wrapper
def ensure_can_packet_version(fn):
@wraps(fn)
def wrapper(self, *args, **kwargs):
if self.can_version < self.CAN_PACKET_VERSION:
raise RuntimeError("Panda firmware has outdated CAN packet definition. Reflash panda firmware.")
elif self.can_version > self.CAN_PACKET_VERSION:
raise RuntimeError("Panda python library has outdated CAN packet definition. Update panda python library.")
return fn(self, *args, **kwargs)
return wrapper
def ensure_can_health_packet_version(fn):
@wraps(fn)
def wrapper(self, *args, **kwargs):
if self.can_health_version < self.CAN_HEALTH_PACKET_VERSION:
raise RuntimeError("Panda firmware has outdated CAN health packet definition. Reflash panda firmware.")
elif self.can_health_version > self.CAN_HEALTH_PACKET_VERSION:
raise RuntimeError("Panda python library has outdated CAN health packet definition. Update panda python library.")
return fn(self, *args, **kwargs)
return wrapper
class ALTERNATIVE_EXPERIENCE:
DEFAULT = 0
DISABLE_DISENGAGE_ON_GAS = 1
DISABLE_STOCK_AEB = 2
RAISE_LONGITUDINAL_LIMITS_TO_ISO_MAX = 8
class Panda:
# matches cereal.car.CarParams.SafetyModel
SAFETY_SILENT = 0
SAFETY_HONDA_NIDEC = 1
SAFETY_TOYOTA = 2
SAFETY_ELM327 = 3
SAFETY_GM = 4
SAFETY_HONDA_BOSCH_GIRAFFE = 5
SAFETY_FORD = 6
SAFETY_HYUNDAI = 8
SAFETY_CHRYSLER = 9
SAFETY_TESLA = 10
SAFETY_SUBARU = 11
SAFETY_MAZDA = 13
SAFETY_NISSAN = 14
SAFETY_VOLKSWAGEN_MQB = 15
SAFETY_ALLOUTPUT = 17
SAFETY_GM_ASCM = 18
SAFETY_NOOUTPUT = 19
SAFETY_HONDA_BOSCH = 20
SAFETY_VOLKSWAGEN_PQ = 21
SAFETY_SUBARU_LEGACY = 22
SAFETY_HYUNDAI_LEGACY = 23
SAFETY_HYUNDAI_COMMUNITY = 24
SAFETY_STELLANTIS = 25
SAFETY_FAW = 26
SAFETY_BODY = 27
SAFETY_HYUNDAI_CANFD = 28
SERIAL_DEBUG = 0
SERIAL_ESP = 1
SERIAL_LIN1 = 2
SERIAL_LIN2 = 3
SERIAL_SOM_DEBUG = 4
GMLAN_CAN2 = 1
GMLAN_CAN3 = 2
REQUEST_IN = usb1.ENDPOINT_IN | usb1.TYPE_VENDOR | usb1.RECIPIENT_DEVICE
REQUEST_OUT = usb1.ENDPOINT_OUT | usb1.TYPE_VENDOR | usb1.RECIPIENT_DEVICE
HW_TYPE_UNKNOWN = b'\x00'
HW_TYPE_WHITE_PANDA = b'\x01'
HW_TYPE_GREY_PANDA = b'\x02'
HW_TYPE_BLACK_PANDA = b'\x03'
HW_TYPE_PEDAL = b'\x04'
HW_TYPE_UNO = b'\x05'
HW_TYPE_DOS = b'\x06'
HW_TYPE_RED_PANDA = b'\x07'
HW_TYPE_RED_PANDA_V2 = b'\x08'
HW_TYPE_TRES = b'\x09'
CAN_PACKET_VERSION = 4
HEALTH_PACKET_VERSION = 11
CAN_HEALTH_PACKET_VERSION = 4
HEALTH_STRUCT = struct.Struct("<IIIIIIIIIBBBBBBHBBBHfBB")
CAN_HEALTH_STRUCT = struct.Struct("<BIBBBBBBBBIIIIIIIHHBBB")
F2_DEVICES = (HW_TYPE_PEDAL, )
F4_DEVICES = (HW_TYPE_WHITE_PANDA, HW_TYPE_GREY_PANDA, HW_TYPE_BLACK_PANDA, HW_TYPE_UNO, HW_TYPE_DOS)
H7_DEVICES = (HW_TYPE_RED_PANDA, HW_TYPE_RED_PANDA_V2, HW_TYPE_TRES)
INTERNAL_DEVICES = (HW_TYPE_UNO, HW_TYPE_DOS)
HAS_OBD = (HW_TYPE_BLACK_PANDA, HW_TYPE_UNO, HW_TYPE_DOS, HW_TYPE_RED_PANDA, HW_TYPE_RED_PANDA_V2, HW_TYPE_TRES)
# first byte is for EPS scaling factor
FLAG_TOYOTA_ALT_BRAKE = (1 << 8)
FLAG_TOYOTA_STOCK_LONGITUDINAL = (2 << 8)
FLAG_HONDA_ALT_BRAKE = 1
FLAG_HONDA_BOSCH_LONG = 2
FLAG_HONDA_NIDEC_ALT = 4
FLAG_HONDA_RADARLESS = 8
FLAG_HYUNDAI_EV_GAS = 1
FLAG_HYUNDAI_HYBRID_GAS = 2
FLAG_HYUNDAI_LONG = 4
FLAG_HYUNDAI_CAMERA_SCC = 8
FLAG_HYUNDAI_CANFD_HDA2 = 16
FLAG_HYUNDAI_CANFD_ALT_BUTTONS = 32
FLAG_HYUNDAI_ALT_LIMITS = 64
FLAG_TESLA_POWERTRAIN = 1
FLAG_TESLA_LONG_CONTROL = 2
FLAG_VOLKSWAGEN_LONG_CONTROL = 1
FLAG_CHRYSLER_RAM_DT = 1
FLAG_CHRYSLER_RAM_HD = 2
FLAG_CHRYSLER_LOWER_RATE = 4
FLAG_SUBARU_GEN2 = 1
FLAG_GM_HW_CAM = 1
FLAG_GM_HW_CAM_LONG = 2
def __init__(self, serial: Optional[str] = None, claim: bool = True, disable_checks: bool = True):
self._serial = serial
self._disable_checks = disable_checks
self._handle = None
self.can_rx_overflow_buffer = b''
# connect and set mcu type
self.connect(claim)
# reset comms
self.can_reset_communications()
def __enter__(self):
return self
def __exit__(self, *args):
self.close()
def close(self):
self._handle.close()
self._handle = None
def connect(self, claim=True, wait=False):
if self._handle is not None:
self.close()
self._handle = None
# try USB first, then SPI
self._handle, serial, self.bootstub, bcd = self.usb_connect(self._serial, claim=claim, wait=wait)
if self._handle is None:
self._handle, serial, self.bootstub, bcd = self.spi_connect(self._serial)
if self._handle is None:
raise Exception("failed to connect to panda")
# Some fallback logic to determine panda and MCU type for old bootstubs,
# since we now support multiple MCUs and need to know which fw to flash.
# Three cases to consider:
# A) oldest bootstubs don't have any way to distinguish
# MCU or panda type
# B) slightly newer (~2 weeks after first C3's built) bootstubs
# have the panda type set in the USB bcdDevice
# C) latest bootstubs also implement the endpoint for panda type
self._bcd_hw_type = None
ret = self._handle.controlRead(Panda.REQUEST_IN, 0xc1, 0, 0, 0x40)
missing_hw_type_endpoint = self.bootstub and ret.startswith(b'\xff\x00\xc1\x3e\xde\xad\xd0\x0d')
if missing_hw_type_endpoint and bcd is not None:
self._bcd_hw_type = bcd
# For case A, we assume F4 MCU type, since all H7 pandas should be case B at worst
self._assume_f4_mcu = (self._bcd_hw_type is None) and missing_hw_type_endpoint
self._serial = serial
self._mcu_type = self.get_mcu_type()
self.health_version, self.can_version, self.can_health_version = self.get_packets_versions()
logging.debug("connected")
# disable openpilot's heartbeat checks
if self._disable_checks:
self.set_heartbeat_disabled()
self.set_power_save(0)
@staticmethod
def spi_connect(serial):
# get UID to confirm slave is present and up
handle = None
spi_serial = None
try:
handle = PandaSpiHandle()
dat = handle.controlRead(Panda.REQUEST_IN, 0xc3, 0, 0, 12)
spi_serial = binascii.hexlify(dat).decode()
except PandaSpiException:
pass
# no connection or wrong panda
if spi_serial is None or (serial is not None and (spi_serial != serial)):
handle = None
spi_serial = None
# TODO: detect bootstub
return handle, spi_serial, False, None
@staticmethod
def usb_connect(serial, claim=True, wait=False):
handle, usb_serial, bootstub, bcd = None, None, None, None
context = usb1.USBContext()
while 1:
try:
for device in context.getDeviceList(skip_on_error=True):
if device.getVendorID() == 0xbbaa and device.getProductID() in (0xddcc, 0xddee):
try:
this_serial = device.getSerialNumber()
except Exception:
continue
if serial is None or this_serial == serial:
logging.debug("opening device %s %s", this_serial, hex(device.getProductID()))
usb_serial = this_serial
bootstub = device.getProductID() == 0xddee
handle = device.open()
if sys.platform not in ("win32", "cygwin", "msys", "darwin"):
handle.setAutoDetachKernelDriver(True)
if claim:
handle.claimInterface(0)
# handle.setInterfaceAltSetting(0, 0) # Issue in USB stack
# bcdDevice wasn't always set to the hw type, ignore if it's the old constant
this_bcd = device.getbcdDevice()
if this_bcd is not None and this_bcd != 0x2300:
bcd = bytearray([this_bcd >> 8, ])
break
except Exception:
logging.exception("USB connect error")
if not wait or handle is not None:
break
context = usb1.USBContext() # New context needed so new devices show up
usb_handle = None
if handle is not None:
usb_handle = PandaUsbHandle(handle)
return usb_handle, usb_serial, bootstub, bcd
@staticmethod
def list():
ret = Panda.usb_list()
ret += Panda.spi_list()
return list(set(ret))
@staticmethod
def usb_list():
context = usb1.USBContext()
ret = []
try:
for device in context.getDeviceList(skip_on_error=True):
if device.getVendorID() == 0xbbaa and device.getProductID() in (0xddcc, 0xddee):
try:
serial = device.getSerialNumber()
if len(serial) == 24:
ret.append(serial)
else:
warnings.warn(f"found device with panda descriptors but invalid serial: {serial}", RuntimeWarning)
except Exception:
continue
except Exception:
pass
return ret
@staticmethod
def spi_list():
_, serial, _, _ = Panda.spi_connect(None)
if serial is not None:
return [serial, ]
return []
def reset(self, enter_bootstub=False, enter_bootloader=False, reconnect=True):
try:
if enter_bootloader:
self._handle.controlWrite(Panda.REQUEST_IN, 0xd1, 0, 0, b'')
else:
if enter_bootstub:
self._handle.controlWrite(Panda.REQUEST_IN, 0xd1, 1, 0, b'')
else:
self._handle.controlWrite(Panda.REQUEST_IN, 0xd8, 0, 0, b'')
except Exception:
pass
if not enter_bootloader and reconnect:
self.reconnect()
def reconnect(self):
if self._handle is not None:
self.close()
time.sleep(1.0)
success = False
# wait up to 15 seconds
for i in range(0, 15):
try:
self.connect()
success = True
break
except Exception:
logging.debug("reconnecting is taking %d seconds...", i + 1)
try:
dfu = PandaDFU(PandaDFU.st_serial_to_dfu_serial(self._serial, self._mcu_type))
dfu.recover()
except Exception:
pass
time.sleep(1.0)
if not success:
raise Exception("reconnect failed")
@staticmethod
def flash_static(handle, code, mcu_type):
assert mcu_type is not None, "must set valid mcu_type to flash"
# confirm flasher is present
fr = handle.controlRead(Panda.REQUEST_IN, 0xb0, 0, 0, 0xc)
assert fr[4:8] == b"\xde\xad\xd0\x0d"
# determine sectors to erase
apps_sectors_cumsum = accumulate(mcu_type.config.sector_sizes[1:])
last_sector = next((i + 1 for i, v in enumerate(apps_sectors_cumsum) if v > len(code)), -1)
assert last_sector >= 1, "Binary too small? No sector to erase."
assert last_sector < 7, "Binary too large! Risk of overwriting provisioning chunk."
# unlock flash
logging.warning("flash: unlocking")
handle.controlWrite(Panda.REQUEST_IN, 0xb1, 0, 0, b'')
# erase sectors
logging.warning(f"flash: erasing sectors 1 - {last_sector}")
for i in range(1, last_sector + 1):
handle.controlWrite(Panda.REQUEST_IN, 0xb2, i, 0, b'')
# flash over EP2
STEP = 0x10
logging.warning("flash: flashing")
for i in range(0, len(code), STEP):
handle.bulkWrite(2, code[i:i + STEP])
# reset
logging.warning("flash: resetting")
try:
handle.controlWrite(Panda.REQUEST_IN, 0xd8, 0, 0, b'')
except Exception:
pass
def flash(self, fn=None, code=None, reconnect=True):
if not fn:
fn = self._mcu_type.config.app_path
assert os.path.isfile(fn)
logging.debug("flash: main version is %s", self.get_version())
if not self.bootstub:
self.reset(enter_bootstub=True)
assert(self.bootstub)
if code is None:
with open(fn, "rb") as f:
code = f.read()
# get version
logging.debug("flash: bootstub version is %s", self.get_version())
# do flash
Panda.flash_static(self._handle, code, mcu_type=self._mcu_type)
# reconnect
if reconnect:
self.reconnect()
def recover(self, timeout: Optional[int] = None, reset: bool = True) -> bool:
dfu_serial = PandaDFU.st_serial_to_dfu_serial(self._serial, self._mcu_type)
if reset:
self.reset(enter_bootstub=True)
self.reset(enter_bootloader=True)
if not self.wait_for_dfu(dfu_serial, timeout=timeout):
return False
dfu = PandaDFU(dfu_serial)
dfu.recover()
# reflash after recover
self.connect(True, True)
self.flash()
return True
@staticmethod
def wait_for_dfu(dfu_serial: str, timeout: Optional[int] = None) -> bool:
t_start = time.monotonic()
while dfu_serial not in PandaDFU.list():
logging.debug("waiting for DFU...")
time.sleep(0.1)
if timeout is not None and (time.monotonic() - t_start) > timeout:
return False
return True
def call_control_api(self, msg):
self._handle.controlWrite(Panda.REQUEST_OUT, msg, 0, 0, b'')
# ******************* health *******************
@ensure_health_packet_version
def health(self):
dat = self._handle.controlRead(Panda.REQUEST_IN, 0xd2, 0, 0, self.HEALTH_STRUCT.size)
a = self.HEALTH_STRUCT.unpack(dat)
return {
"uptime": a[0],
"voltage": a[1],
"current": a[2],
"safety_tx_blocked": a[3],
"safety_rx_invalid": a[4],
"tx_buffer_overflow": a[5],
"rx_buffer_overflow": a[6],
"gmlan_send_errs": a[7],
"faults": a[8],
"ignition_line": a[9],
"ignition_can": a[10],
"controls_allowed": a[11],
"gas_interceptor_detected": a[12],
"car_harness_status": a[13],
"safety_mode": a[14],
"safety_param": a[15],
"fault_status": a[16],
"power_save_enabled": a[17],
"heartbeat_lost": a[18],
"alternative_experience": a[19],
"interrupt_load": a[20],
"fan_power": a[21],
"safety_rx_checks_invalid": a[22],
}
@ensure_can_health_packet_version
def can_health(self, can_number):
LEC_ERROR_CODE = {
0: "No error",
1: "Stuff error",
2: "Form error",
3: "AckError",
4: "Bit1Error",
5: "Bit0Error",
6: "CRCError",
7: "NoChange",
}
dat = self._handle.controlRead(Panda.REQUEST_IN, 0xc2, int(can_number), 0, self.CAN_HEALTH_STRUCT.size)
a = self.CAN_HEALTH_STRUCT.unpack(dat)
return {
"bus_off": a[0],
"bus_off_cnt": a[1],
"error_warning": a[2],
"error_passive": a[3],
"last_error": LEC_ERROR_CODE[a[4]],
"last_stored_error": LEC_ERROR_CODE[a[5]],
"last_data_error": LEC_ERROR_CODE[a[6]],
"last_data_stored_error": LEC_ERROR_CODE[a[7]],
"receive_error_cnt": a[8],
"transmit_error_cnt": a[9],
"total_error_cnt": a[10],
"total_tx_lost_cnt": a[11],
"total_rx_lost_cnt": a[12],
"total_tx_cnt": a[13],
"total_rx_cnt": a[14],
"total_fwd_cnt": a[15],
"total_tx_checksum_error_cnt": a[16],
"can_speed": a[17],
"can_data_speed": a[18],
"canfd_enabled": a[19],
"brs_enabled": a[20],
"canfd_non_iso": a[21],
}
# ******************* control *******************
def enter_bootloader(self):
try:
self._handle.controlWrite(Panda.REQUEST_OUT, 0xd1, 0, 0, b'')
except Exception:
logging.exception("exception while entering bootloader")
def get_version(self):
return self._handle.controlRead(Panda.REQUEST_IN, 0xd6, 0, 0, 0x40).decode('utf8')
@staticmethod
def get_signature_from_firmware(fn) -> bytes:
f = open(fn, 'rb')
f.seek(-128, 2) # Seek from end of file
return f.read(128)
def get_signature(self):
part_1 = self._handle.controlRead(Panda.REQUEST_IN, 0xd3, 0, 0, 0x40)
part_2 = self._handle.controlRead(Panda.REQUEST_IN, 0xd4, 0, 0, 0x40)
return bytes(part_1 + part_2)
def get_type(self):
ret = self._handle.controlRead(Panda.REQUEST_IN, 0xc1, 0, 0, 0x40)
# old bootstubs don't implement this endpoint, see comment in Panda.device
if self._bcd_hw_type is not None and (ret is None or len(ret) != 1):
ret = self._bcd_hw_type
return ret
# Returns tuple with health packet version and CAN packet/USB packet version
def get_packets_versions(self):
dat = self._handle.controlRead(Panda.REQUEST_IN, 0xdd, 0, 0, 3)
if dat and len(dat) == 3:
a = struct.unpack("BBB", dat)
return (a[0], a[1], a[2])
else:
return (0, 0, 0)
def get_mcu_type(self) -> McuType:
hw_type = self.get_type()
if hw_type in Panda.F2_DEVICES:
return McuType.F2
elif hw_type in Panda.F4_DEVICES:
return McuType.F4
elif hw_type in Panda.H7_DEVICES:
return McuType.H7
else:
# have to assume F4, see comment in Panda.connect
if self._assume_f4_mcu:
return McuType.F4
raise ValueError(f"unknown HW type: {hw_type}")
def has_obd(self):
return self.get_type() in Panda.HAS_OBD
def is_internal(self):
return self.get_type() in Panda.INTERNAL_DEVICES
def get_serial(self):
"""
Returns the comma-issued dongle ID from our provisioning
"""
dat = self._handle.controlRead(Panda.REQUEST_IN, 0xd0, 0, 0, 0x20)
hashsig, calc_hash = dat[0x1c:], hashlib.sha1(dat[0:0x1c]).digest()[0:4]
assert(hashsig == calc_hash)
return [dat[0:0x10].decode("utf8"), dat[0x10:0x10 + 10].decode("utf8")]
def get_usb_serial(self):
"""
Returns the serial number reported from the USB descriptor;
matches the MCU UID
"""
return self._serial
def get_uid(self):
"""
Returns the UID from the MCU
"""
dat = self._handle.controlRead(Panda.REQUEST_IN, 0xc3, 0, 0, 12)
return binascii.hexlify(dat).decode()
def get_secret(self):
return self._handle.controlRead(Panda.REQUEST_IN, 0xd0, 1, 0, 0x10)
# ******************* configuration *******************
def set_power_save(self, power_save_enabled=0):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xe7, int(power_save_enabled), 0, b'')
def enable_deepsleep(self):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xfb, 0, 0, b'')
def set_esp_power(self, on):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xd9, int(on), 0, b'')
def esp_reset(self, bootmode=0):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xda, int(bootmode), 0, b'')
time.sleep(0.2)
def set_safety_mode(self, mode=SAFETY_SILENT, param=0):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xdc, mode, param, b'')
def set_gmlan(self, bus=2):
# TODO: check panda type
if bus is None:
self._handle.controlWrite(Panda.REQUEST_OUT, 0xdb, 0, 0, b'')
elif bus in (Panda.GMLAN_CAN2, Panda.GMLAN_CAN3):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xdb, 1, bus, b'')
def set_obd(self, obd):
# TODO: check panda type
self._handle.controlWrite(Panda.REQUEST_OUT, 0xdb, int(obd), 0, b'')
def set_can_loopback(self, enable):
# set can loopback mode for all buses
self._handle.controlWrite(Panda.REQUEST_OUT, 0xe5, int(enable), 0, b'')
def set_can_enable(self, bus_num, enable):
# sets the can transceiver enable pin
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf4, int(bus_num), int(enable), b'')
def set_can_speed_kbps(self, bus, speed):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xde, bus, int(speed * 10), b'')
def set_can_data_speed_kbps(self, bus, speed):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf9, bus, int(speed * 10), b'')
def set_canfd_non_iso(self, bus, non_iso):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xfc, bus, int(non_iso), b'')
def set_uart_baud(self, uart, rate):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xe4, uart, int(rate / 300), b'')
def set_uart_parity(self, uart, parity):
# parity, 0=off, 1=even, 2=odd
self._handle.controlWrite(Panda.REQUEST_OUT, 0xe2, uart, parity, b'')
def set_uart_callback(self, uart, install):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xe3, uart, int(install), b'')
# ******************* can *******************
# The panda will NAK CAN writes when there is CAN congestion.
# libusb will try to send it again, with a max timeout.
# Timeout is in ms. If set to 0, the timeout is infinite.
CAN_SEND_TIMEOUT_MS = 10
def can_reset_communications(self):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xc0, 0, 0, b'')
@ensure_can_packet_version
def can_send_many(self, arr, timeout=CAN_SEND_TIMEOUT_MS):
snds = pack_can_buffer(arr)
while True:
try:
for tx in snds:
while True:
bs = self._handle.bulkWrite(3, tx, timeout=timeout)
tx = tx[bs:]
if len(tx) == 0:
break
logging.error("CAN: PARTIAL SEND MANY, RETRYING")
break
except (usb1.USBErrorIO, usb1.USBErrorOverflow):
logging.error("CAN: BAD SEND MANY, RETRYING")
def can_send(self, addr, dat, bus, timeout=CAN_SEND_TIMEOUT_MS):
self.can_send_many([[addr, None, dat, bus]], timeout=timeout)
@ensure_can_packet_version
def can_recv(self):
dat = bytearray()
while True:
try:
dat = self._handle.bulkRead(1, 16384) # Max receive batch size + 2 extra reserve frames
break
except (usb1.USBErrorIO, usb1.USBErrorOverflow):
logging.error("CAN: BAD RECV, RETRYING")
time.sleep(0.1)
msgs, self.can_rx_overflow_buffer = unpack_can_buffer(self.can_rx_overflow_buffer + dat)
return msgs
def can_clear(self, bus):
"""Clears all messages from the specified internal CAN ringbuffer as
though it were drained.
Args:
bus (int): can bus number to clear a tx queue, or 0xFFFF to clear the
global can rx queue.
"""
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf1, bus, 0, b'')
# ******************* isotp *******************
def isotp_send(self, addr, dat, bus, recvaddr=None, subaddr=None):
return isotp_send(self, dat, addr, bus, recvaddr, subaddr)
def isotp_recv(self, addr, bus=0, sendaddr=None, subaddr=None):
return isotp_recv(self, addr, bus, sendaddr, subaddr)
# ******************* serial *******************
def serial_read(self, port_number):
ret = []
while 1:
lret = bytes(self._handle.controlRead(Panda.REQUEST_IN, 0xe0, port_number, 0, 0x40))
if len(lret) == 0:
break
ret.append(lret)
return b''.join(ret)
def serial_write(self, port_number, ln):
ret = 0
if type(ln) == str:
ln = bytes(ln, 'utf-8')
for i in range(0, len(ln), 0x20):
ret += self._handle.bulkWrite(2, struct.pack("B", port_number) + ln[i:i + 0x20])
return ret
def serial_clear(self, port_number):
"""Clears all messages (tx and rx) from the specified internal uart
ringbuffer as though it were drained.
Args:
port_number (int): port number of the uart to clear.
"""
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf2, port_number, 0, b'')
# ******************* kline *******************
# pulse low for wakeup
def kline_wakeup(self, k=True, l=True):
assert k or l, "must specify k-line, l-line, or both"
logging.debug("kline wakeup...")
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf0, 2 if k and l else int(l), 0, b'')
logging.debug("kline wakeup done")
def kline_5baud(self, addr, k=True, l=True):
assert k or l, "must specify k-line, l-line, or both"
logging.debug("kline 5 baud...")
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf4, 2 if k and l else int(l), addr, b'')
logging.debug("kline 5 baud done")
def kline_drain(self, bus=2):
# drain buffer
bret = bytearray()
while True:
ret = self._handle.controlRead(Panda.REQUEST_IN, 0xe0, bus, 0, 0x40)
if len(ret) == 0:
break
logging.debug(f"kline drain: 0x{ret.hex()}")
bret += ret
return bytes(bret)
def kline_ll_recv(self, cnt, bus=2):
echo = bytearray()
while len(echo) != cnt:
ret = self._handle.controlRead(Panda.REQUEST_OUT, 0xe0, bus, 0, cnt - len(echo))
if len(ret) > 0:
logging.debug(f"kline recv: 0x{ret.hex()}")
echo += ret
return bytes(echo)
def kline_send(self, x, bus=2, checksum=True):
self.kline_drain(bus=bus)
if checksum:
x += bytes([sum(x) % 0x100])
for i in range(0, len(x), 0xf):
ts = x[i:i + 0xf]
logging.debug(f"kline send: 0x{ts.hex()}")
self._handle.bulkWrite(2, bytes([bus]) + ts)
echo = self.kline_ll_recv(len(ts), bus=bus)
if echo != ts:
logging.error(f"**** ECHO ERROR {i} ****")
logging.error(f"0x{echo.hex()}")
logging.error(f"0x{ts.hex()}")
assert echo == ts
def kline_recv(self, bus=2, header_len=4):
# read header (last byte is length)
msg = self.kline_ll_recv(header_len, bus=bus)
# read data (add one byte to length for checksum)
msg += self.kline_ll_recv(msg[-1]+1, bus=bus)
return msg
def send_heartbeat(self, engaged=True):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf3, engaged, 0, b'')
# disable heartbeat checks for use outside of openpilot
# sending a heartbeat will reenable the checks
def set_heartbeat_disabled(self):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf8, 0, 0, b'')
# ******************* RTC *******************
def set_datetime(self, dt):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xa1, int(dt.year), 0, b'')
self._handle.controlWrite(Panda.REQUEST_OUT, 0xa2, int(dt.month), 0, b'')
self._handle.controlWrite(Panda.REQUEST_OUT, 0xa3, int(dt.day), 0, b'')
self._handle.controlWrite(Panda.REQUEST_OUT, 0xa4, int(dt.isoweekday()), 0, b'')
self._handle.controlWrite(Panda.REQUEST_OUT, 0xa5, int(dt.hour), 0, b'')
self._handle.controlWrite(Panda.REQUEST_OUT, 0xa6, int(dt.minute), 0, b'')
self._handle.controlWrite(Panda.REQUEST_OUT, 0xa7, int(dt.second), 0, b'')
def get_datetime(self):
dat = self._handle.controlRead(Panda.REQUEST_IN, 0xa0, 0, 0, 8)
a = struct.unpack("HBBBBBB", dat)
return datetime.datetime(a[0], a[1], a[2], a[4], a[5], a[6])
# ******************* IR *******************
def set_ir_power(self, percentage):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xb0, int(percentage), 0, b'')
# ******************* Fan ******************
def set_fan_power(self, percentage):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xb1, int(percentage), 0, b'')
def get_fan_rpm(self):
dat = self._handle.controlRead(Panda.REQUEST_IN, 0xb2, 0, 0, 2)
a = struct.unpack("H", dat)
return a[0]
# ****************** Phone *****************
def set_phone_power(self, enabled):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xb3, int(enabled), 0, b'')
# ****************** Siren *****************
def set_siren(self, enabled):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf6, int(enabled), 0, b'')
# ****************** Debug *****************
def set_green_led(self, enabled):
self._handle.controlWrite(Panda.REQUEST_OUT, 0xf7, int(enabled), 0, b'')