README Raspbian¶
The simplyCAN software package is delivered as .tar.gz archive, which includes the following components:
simplyCAN library (so, static lib)
Header file
busmonitor
Demo applications for C and Python
API documentation
License
Installation¶
The USB interface is automatically installed when plugged in, without a driver installation. By default the device will be mapped to
/dev/ttyACMx. To specify a different name, the following udev rule can be defined:SUBSYSTEM=="tty", ATTRS{idVendor}=="08d8", ATTRS{idProduct}=="001d", SYMLINK+="SIMPLY_CAN"
If the
modemmanageris installed on your system, it may grab the device after plugged in. During this time, the device cannot be used by your application. To prevent the modem manager to grab the device, the following udev rule can be defined:ATTRS{idVendor}=="08d8", ATTRS{idProduct}=="001d", ENV{ID_MM_DEVICE_IGNORE}="1"
Create the udev file in /etc/udev/rules.d, typically named
60-simplyCAN.rules(root access required). See also: https://wiki.debian.org/udevTo activate the new rules, execute the following command:
udevadm control --reload-rulesIf user rights for using the simplyCAN device are missing, add your user name to the dialout group:
sudo usermod -a -G dialout $USER
Usage of the Demo Applications¶
The demo applications are available for C and Python. First the serial port has to be adapted according to your hardware setup. To determine the used serial port, you can:
use the simplyCAN bus monitor
use the command
ls -l /dev/serial/by-iduse a udev rule (see above)
use the function
retrieve_serial_port()(C and Python)
C Demo¶
Adapt the
k_SERIAL_PORTandk_BAUDRATEdefines indemo.caccording to your hardware setup:#ifdef __unix__ #define k_SERIAL_PORT "/dev/ttyACM0" #else #define k_SERIAL_PORT "COM1" #endif #define k_BAUDRATE (250)
Compile the demo with
makeand run the executable located in bin/
Python Demo¶
The Python wrapper
simply_py.sois built for Python 3.7 (32 bit).Adapt the COM port in
demo.pyaccording to your hardware setup:# main(simply_can.retrieve_serial_port()) # main("/dev/ttyACM0", 250) # for Linux main("COM6", 250) # for Windows
The value
250is the used baudrate in kBaud.Run the demo with
python3 demo.py.
Copyright¶
(C) 2019-2022 HMS Technology Center Ravensburg GmbH
Helmut-Vetter-Strasse 2
88213 Ravensburg
Germany