To get sys interface syntax

• Enter echo help(h) to the sys interface to obtain the format for the parameters to be provided in dmesg.

echo h > /sys/devices/c320000.mttcan/net/can1/gfc_filter

The following is an example response from this command.

usage:anfs=0..3 anfe=0..3 rrfs=0/1 rrfe=0/1

All fields in this register are unsigned integers.

For example:

echo "anfs=0 anfe=0 rrfs=0 rrfe=0" > /sys/devices/c320000.mttcan/net/can1/gfc_filter