SocketCAN recover from Error
Posted: Tue 24. Feb 2015, 14:31
I am working on a SocketCAN implementation in C / C++
When the Peak USB CAN dongle is in a error state (BUS-OFF in below example), I can not send messages on the bus anymore.
Receiving of messages is no problem.
Also the corresponding error frame(s) when the dongle switch to error state is not very clear to me:
Benno
When the Peak USB CAN dongle is in a error state (BUS-OFF in below example), I can not send messages on the bus anymore.
Receiving of messages is no problem.
Code: Select all
# ifconfig -a
can0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP NOARP MTU:16 Metric:1
RX packets:44385 errors:0 dropped:0 overruns:0 frame:0
TX packets:24948 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:326159 (318.5 KiB) TX bytes:188824 (184.3 KiB)
Code: Select all
# ip -d link show can0
3: can0: <NO-CARRIER,NOARP,UP,ECHO> mtu 16 qdisc pfifo_fast state DOWN mode DEFAULT qlen 10
link/can
can state BUS-OFF restart-ms 0
bitrate 500000 sample-point 0.875
tq 125 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1
pcan_usb: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1
clock 8000000
Code: Select all
error message frame
Can worker iRes(16) 0x04 0x00 0x00 0x20 0x08 0x00 0x00 0x00
CAN id = 0x20000004
CAN dlc = 0x8
CAN data= 0x00 0x0C 0x00 0x00 0x00 0x00 0x00 0x00
error message frame
Can worker iRes(16) 0x04 0x00 0x00 0x20 0x08 0x00 0x00 0x00
CAN id = 0x20000004
CAN dlc = 0x8
CAN data= 0x00 0x30 0x00 0x00 0x00 0x00 0x00 0x00
error message frame
Can worker iRes(16) 0x40 0x00 0x00 0x20 0x08 0x00 0x00 0x00
CAN id = 0x20000040
CAN dlc = 0x8
CAN data= 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
