andy-1954 / canpp

CAN++

Overview

CAN++ is a free Windows program for receiving, transmitting and analyzing (*.asc, .blf) CAN bus messages (CAN Classic and CAN FD) for using with SuperCAN devices or without CAN hardware (virtual bus). After import of CAN data base files (.dbc, *.arxml) CAN signals are shown in symbolic form. Signals can be presented as graphics (wave forms) too.

Furthermore:

• CAN simulation is possible by programming CAN behaviour in C++.
• CAN traces can be generated, imported and replayed (*.asc format, *.blf can be imported).
• Diagnostics can be performed (PDX import, fault memory, measurement and identification data)

There are several devices which are supported by SuperCAN firmware and can be used with CAN++. For example:

• Open Source Hardware: USB_CAN-FD
• Off the shelf: Adafruit Feather M4 CAN Express (simple drag & drop of firmware)

CAN++ can be just started (no installation).
The user manual is located in sub folder doc/user_manual (Markdown and HTML version, work in progress).

Traces

CAN traces can be generated, imported and replayed (.asc format). Import and replay is possible with BLF files too (.blf).

CAN transmit

• cyclic, once, with time offset
• define signals as raw or physical values
• or define signals with wave configurator

CAN simulation in C++

• one .cpp file per CAN node (see Example ECU_main.cpp)
• react on CAN-Messages (::onMessage()) or signals
• send CAN messages
• Timers (can be used for cyclic sending of CAN messages)
• print text
• integrated IDE and integrated C++ Compiler (DMC)
• react on key presses
• react on commands received from remote client program (See chapter "Remote control")

Instead of the CAN++ IDE you can use your own of course. After first compiling of code CAN++ generates C++ classes for all CAN messages and signals (see canl/canl_data.cpp) so another IDE will give context input support too.

Remote control

CAN++ can be remote controlled. To do so start CAN++ with option -server on command line:

can++.exe -server

Currently following actions can be taken:

• Start CAN bus

• Stop CAN bus

• Send a generic command to C++ simulation, which can be used to trigger self-defined actions, examples may be:

  • call a test function
  • set a global variable to switch behaviour
  • send a CAN message provided by command string
  • etc.

Please see client example source code (Python, C# and C++) in folder examples/remote_control.

CAN statistics

CAN diagnostics

• faultmemory
• measurement data
• identification
• import PDX files

Installation

CAN++ can be used without installation. It should not be placed in system folders like "C:\Programs". Path should contain "A-Za-z0-9_" only. Otherwise integrated Compiler will not work. By calling "INSTALL.bat" a shortcut is created on desktop.

Tips

How to flash SuperCAN firmware on Adafruit Feather M4 CAN Express (on Windows)

• download SuperCAN firmware file supercan-firmware.tar.xz from https://github.com/jgressmann/supercan/releases/tag/latest-master
• Unpack supercan-firmware.tar.xz (7-Zip could be used), needed file is supercan.uf2
• plug in device
• push the button on the device twice
• a drive "FTHRBOOT" will show up in file explorer
• drop the file supercan.uf2 on this drive
• after 10 seconds replug the device