SIMPLE CAN-BUS ADAPTER FOR ACCELERATOR CONTROL RUNNING UNDER LINUX AND RTLINUX.

CAN-bus was chosen as basic fieldbus for newly designed distributed control system for electron linac. To provide CAN-bus access for PC CAN-bus ISA compatible adapters have been designed. The adapter is based on Philips SJA1000 CAN-bus controller and provides fast access to CAN-bus through direct memory mapping. To use the adapter under Linux the Linux kernel mode driver was developed. To support operation in real-time driver for RTLinux has been developed and tested. Both drivers provide the same POSIX IO compatible interface for application software.