This blog will show you how to write a basic CAN-Bus program in C for the Raspberry Pi 2 board.
Before you start make sure the drivers are installed and working correctly first.
Download the source code and example files by typing the following in the command prompt:
wget http://skpang.co.uk/dl/cantest.tar
Unpack the tar file and change into directory by:
tar xf cantest.tar
cd linux-can-utils
The example file is called cantest.c to edit this file, type the following in the command prompt:
nano cantest.c
Line 77 is the CAN message to be sent out.
unsigned char buff[] = "7DF#0201050000000000";
7DF is the message ID and 0201050000000000 is the data. Change the data to suit.
Press CTRL-X to exit.
To compile the program type:
make
Check there are no errors. To run the program type:
./cantest