isotp update

README.md

@@ -144,10 +144,9 @@ await dev.set_terminator(channel=2, enabled=False)
 ## ISO-TP (isotp_async)
 ISO-TP канал строится поверх CarBusDevice:
 ````python
-from isotp_async import IsoTpChannel
+from isotp_async import open_isotp
 
-can_tr = CarBusCanTransport(dev, channel=1, rx_id=0x7E8)
-isotp = IsoTpChannel(can_tr, tx_id=0x7E0, rx_id=0x7E8)
+isotp = await open_isotp(dev, channel=1, tx_id=0x7E0, rx_id=0x7E8)
 
 # отправить запрос ReadDataByIdentifier F190 (VIN)
 await isotp.send_pdu(b"\x22\xF1\x90")
@@ -161,12 +160,10 @@ print("ISO-TP:", resp.hex())
 
 Клиент UDS использует IsoTpChannel:
 ````python
-from isotp_async import CarBusCanTransport
-from isotp_async import IsoTpChannel
+from isotp_async import open_isotp
 from uds_async import UdsClient
 
-can_tr = CarBusCanTransport(dev, channel=1, rx_id=0x7E8)
-isotp = IsoTpChannel(can_tr, tx_id=0x7E0, rx_id=0x7E8)
+isotp = await open_isotp(dev, channel=1, tx_id=0x7E0, rx_id=0x7E8)
 uds = UdsClient(isotp)
 
 vin = await uds.read_data_by_identifier(0xF190)
@@ -174,7 +171,6 @@ print("VIN:", vin.decode(errors="ignore"))
 ````
 
 
-
 ## Удалённая работа через TCP (tcp_bridge)
 
 ### 1. Сервер (рядом с адаптером)

isotp_async/__init__.py

@@ -1,7 +1,9 @@
 from .carbus_iface import CarBusCanTransport
 from .transport import IsoTpChannel
+from .api import open_isotp
 
 __all__ = [
     "CarBusCanTransport",
     "IsoTpChannel",
+    "open_isotp",
 ]

isotp_async/api.py

@@ -0,0 +1,29 @@
+# isotp_async/api.py
+from __future__ import annotations
+from dataclasses import dataclass
+from typing import Any
+
+from isotp_async import IsoTpChannel, CarBusCanTransport
+
+
+@dataclass(frozen=True)
+class IsoTpEndpoint:
+    tx_id: int
+    rx_id: int
+    channel: int = 1
+
+
+async def open_isotp(dev: Any, *, endpoint: IsoTpEndpoint | None = None,
+                     channel: int = 1, tx_id: int | None = None, rx_id: int | None = None,
+                     **channel_kwargs) -> IsoTpChannel:
+
+    if endpoint is not None:
+        channel = endpoint.channel
+        tx_id = endpoint.tx_id
+        rx_id = endpoint.rx_id
+
+    if tx_id is None or rx_id is None:
+        raise ValueError("tx_id and rx_id are required (or pass endpoint=...)")
+
+    can_tr = CarBusCanTransport(dev, channel=channel, rx_id=rx_id)
+    return IsoTpChannel(can_tr, tx_id=tx_id, rx_id=rx_id, **channel_kwargs)

main.py

@@ -1,13 +1,15 @@
 import asyncio
 
-from carbus_async import CanMessage
-from carbus_async.device import CarBusDevice, CanTiming
-from isotp_async.carbus_iface import CarBusCanTransport
-from isotp_async import IsoTpChannel
-from uds_async.client import UdsClient
+from carbus_async import CarBusDevice
+from isotp_async import open_isotp
+from uds_async import UdsClient
 
 import logging
 
+logging.basicConfig(
+    level=logging.DEBUG,
+    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+)
 
 async def main(is_debug=False):
 
@@ -25,48 +27,9 @@ async def main(is_debug=False):
         nominal_bitrate=500_000,
     )
 
-    # await dev.open_can_channel_custom(
-    #     channel=1,
-    #     nominal_timing=CanTiming(
-    #         prescaler=15,
-    #         tq_seg1=12,
-    #         tq_seg2=3,
-    #         sjw=1
-    #     ),
-    #     data_timing=CanTiming(
-    #         prescaler=6,
-    #         tq_seg1=7,
-    #         tq_seg2=2,
-    #         sjw=1
-    #     ),
-    #     fd=True,
-    #     brs=True,
-    # )
-
     await dev.set_terminator(channel=1, enabled=True)
 
-    await asyncio.sleep(0.5)
-
-    msg = CanMessage(can_id=0x7E0, data=b"\x02\x3E\x00\x00\x00\x00\x00\x00",fd=True, brs=True)
-    await dev.send_can(msg, channel=1)
-
-    info = await dev.get_device_info()
-    print("HW:", info.hardware_id, info.hardware_name)
-    print("FW:", info.firmware_version)
-    print("Serial #", info.serial_int)
-
-    print("Features:",
-          "gateway" if info.feature_gateway else "",
-          "isotp" if info.feature_isotp else "",
-          "txbuf" if info.feature_tx_buffer else "",
-          "txtask" if info.feature_tx_task else "",
-          )
-
-    await dev.clear_all_filters(1)
-    await dev.set_std_id_filter(1, index=0, can_id=0x7E8, mask=0x7FF)
-
-    can_tr = CarBusCanTransport(dev, channel=1, rx_id=0x7E8)
-    isotp = IsoTpChannel(can_tr, tx_id=0x7E0, rx_id=0x7E8)
+    isotp = await open_isotp(dev, channel=1, tx_id=0x7E0, rx_id=0x7E8)
     uds = UdsClient(isotp)
 
     vin = await uds.read_data_by_identifier(0xF190)