CAN driver for Geschwister Schneider USB/CAN devices and bytewerk.org candleLight USB CAN interfaces¶
Windows/Linux/Mac CAN driver based on usbfs or WinUSB WCID for Geschwister Schneider USB/CAN devices and candleLight USB CAN interfaces.
Install: pip install "python-can[gs_usb]"
Usage: pass bus
and address
to open the device. The parameters can be got by pyusb
as shown below:
import usb
import can
dev = usb.core.find(idVendor=0x1D50, idProduct=0x606F)
bus = can.Bus(bustype="gs_usb", channel=dev.product, bus=dev.bus, address=dev.address, bitrate=250000)
Supported devices¶
Geschwister Schneider USB/CAN devices and bytewerk.org candleLight USB CAN interfaces such as candleLight, canable, cantact, etc.
Supported platform¶
Windows, Linux and Mac.
Note
The backend driver depends on pyusb <https://pyusb.github.io/pyusb/> so a pyusb
backend driver library such as libusb
must be installed. On Windows a tool such as Zadig <https://zadig.akeo.ie/> can be used to set the USB device driver to libusb-win32
.
Supplementary Info on gs_usb
¶
The firmware implementation for Geschwister Schneider USB/CAN devices and candleLight USB CAN can be found in candle-usb/candleLight_fw. The Linux kernel driver can be found in linux/drivers/net/can/usb/gs_usb.c.
The gs_usb
interface in PythonCan
relys on upstream gs_usb
package, which can be found in https://pypi.org/project/gs-usb/ or https://github.com/jxltom/gs_usb.
The gs_usb
package is using pyusb
as backend, which brings better crossplatform compatibility.
Note: The bitrate 10K
, 20K
, 50K
, 83.333K
, 100K
, 125K
, 250K
, 500K
, 800K
and 1M
are supported in this interface, as implemented in the upstream gs_usb
package’s set_bitrate
method.
Note: Message filtering is not supported in Geschwister Schneider USB/CAN devices and bytewerk.org candleLight USB CAN interfaces.