Phytec L-1017e.A3 i.MX 8M Plus, Manual

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L-1017e.A3 i.MX 8M Plus BSP Manual
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CAN FD
The phyBOARD-Pollux two flexCAN interfaces supporting CAN FD. They are supported by the Linux standard CAN
framework which builds upon then the Linux network layer. Using this framework, the CAN interfaces behave like
an ordinary
Linux network device, with some additional features special to CAN. More information can be found in
the Linux Kernel documentation: https://www.kernel.org/doc/html/latest/networking/can.html
Use:
target$ ip link
to see the state of the interfaces. The two CAN interfaces should show up as can0 and ca n1.
To get information on can0, such as bit rate and error counters, type:
target$ ip -d -s link show can0
The information for can0 will look like:
2 : can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN mode DEFAULT
group default qlen 10
link/can promiscuity 0 minmtu 0 maxmtu 0
can state ERROR-ACTIVE (berr-counter tx 0 rx 0 ) restart-ms 0
bitrate 500000 sample-point 0.875
tq 50 prop-seg 17 phase-seg1 17 phase-seg2 5 sjw 1
mcp25xxfd: tseg1 2 .. 256 tseg2 1 .. 128 sjw 1 .. 128 brp 1 .. 256 brp-inc 1
mcp25xxfd: dtseg1 1 .. 32 dtseg2 1 .. 16 dsjw 1 .. 16 dbrp 1 .. 256 dbrp-inc 1
clock 20000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 0 0 0
numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
RX: bytes packets errors dropped overrun mcast
0 0 0 0 0 0
TX: bytes packets errors dropped carrier collsns
0 0 0 0 0 0
The output contains a standard set of parameters also shown for Ethernet interfaces, so not all of these are
necessarily relevant for CAN (for example the MAC address). The following output parameters contain useful
information:
Field Description
can0 Interface Name
NOARP CAN cannot use ARP protocol