imx6 can测试
http://www.cnblogs.com/zengjfgit/p/5754277.html
http://blog.csdn.net/liuhuahan/article/details/18309139
一、shell 命令流程：
1. netcfg can0 down
2. ip link set can0 type can bitrate 1000000 triple-sampling on(或者：ip link set can0 up type can bitrate 1000000)
3. ip -details -statistic link show can0
4. netcfg can0 up
5. ./cansend can0 111#1122334455667788 //发送 ./cansend can0 111#2233445566778899
6. ip -details -statistic link show can0
7. ./canfdtest -vv can0
8. ip -details -statistic link show can0
9. ./candump can0 //接收
一、shell 命令流程：
1. netcfg can1 down
2. ip link set can1 type can bitrate 1000000 triple-sampling on(或者：ip link set can1 up type can bitrate 1000000)
3. ip -details -statistic link show can1
4. netcfg can1 up
5. ./cansend can1 111#1122334455667788 //发送 ./cansend can1 111#2233445566778899
6. ip -details -statistic link show can1
7. ./canfdtest -vv can1
8. ip -details -statistic link show can1
9. ./candump can1 //接收
二、运行流程：
root@android:/ # netcfg can0 down
root@android:/ # ip link set can0 type can bitrate 1000000 triple-sampling on
root@android:/ # ip -details -statistic link show can0
2: can0:
link/can
can
bitrate 1000000 sample-point 0.733
tq 66 prop-seg 5 phase-seg1 5 phase-seg2 4 sjw 1
flexcan: tseg1 4..16 tseg2 2..8 sjw 1..4 brp 1..256 brp-inc 1
clock 30000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 0 0 0
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
root@android:/ # netcfg can0 up
flexcan imx6q-flexcan.0: writing ctrl=0x01232084
127|root@android:/ # cd /data/local
root@android:/data/local # ./cansend can0 111#1122334455667788
root@android:/data/local # ip -details -statistic link show can0
2: can0:
link/can
can
bitrate 1000000 sample-point 0.733
tq 66 prop-seg 5 phase-seg1 5 phase-seg2 4 sjw 1
flexcan: tseg1 4..16 tseg2 2..8 sjw 1..4 brp 1..256 brp-inc 1
clock 30000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 0 0 0
RX: bytes packets errors dropped overrun mcast
0 0 0 0 0 0
TX: bytes packets errors dropped carrier collsns
8 1 0 0 0 0
root@android:/data/local # ip -details -statistic link show can0
2: can0:
link/can
can
bitrate 1000000 sample-point 0.733
tq 66 prop-seg 5 phase-seg1 5 phase-seg2 4 sjw 1
flexcan: tseg1 4..16 tseg2 2..8 sjw 1..4 brp 1..256 brp-inc 1
clock 30000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 0 0 0
RX: bytes packets errors dropped overrun mcast
8 1 0 0 0 0
TX: bytes packets errors dropped carrier collsns
8 1 0 0 0 0
root@android:/data/local # ./canfdtest -vv can0
interface = can0, family = 29, type = 3, proto = 1
0037: [8] 37 37 37 37 37 70 c9 00
0037: [8] 37 37 37 37 37 70 c9 00
0037: [8] 37 37 37 37 37 70 c9 00
0037: [8] 37 37 37 37 37 70 c9 00
^Crecv failed: Bad file number
Exiting...
255|root@android:/data/local # ip -details -statistic link show can0
2: can0:
link/can
can
bitrate 1000000 sample-point 0.733
tq 66 prop-seg 5 phase-seg1 5 phase-seg2 4 sjw 1
flexcan: tseg1 4..16 tseg2 2..8 sjw 1..4 brp 1..256 brp-inc 1
clock 30000000
re-started bus-errors arbit-lost error-warn error-pass bus-off
0 0 0 0 0 0
RX: bytes packets errors dropped overrun mcast
40 5 0 0 0 0
TX: bytes packets errors dropped carrier collsns
40 5 0 0 0 0
root@android:/data/local #