Read message from can on nx

[bhalgesanika]

i am trying to read data coming from can bus of stm32 to jetson xavier nx model p3518 .
i followed this Enabling CAN on Nvidia Jetson Xavier Developer Kit | by Ramin Nabati | Medium. in enable_CAN.sh i removed all the line concerning can1 .
my conncetion are:
nx 5v to TJ1050 vcc
gnd to gnd of tj1050
pin 29 to tx of tj1050
pin31 to rx of tj1050
s@ts-desktop:~$ candump -x any &
[1] 22731
ts@ts-desktop:~$ ifconfig
can0: flags=193<UP,RUNNING,NOARP> mtu 72
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 10 (UNSPEC)
RX packets 13 bytes 104 (104.0 B)
RX errors 10 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 1 overruns 0 carrier 1 collisions 0
device interrupt 46
dmesg --follow has
20867.796690] tegradc 15200000.display: unblank
[20867.796721] tegradc 15210000.display: blank - powerdown
[22894.664921] mttcan c310000.mttcan can0: Bitrate set
[22894.665052] mttcan_controller_config: ctrlmode 30
[22894.665079] mttcan c310000.mttcan can0: Bitrate set
[22894.665092] mttcan c310000.mttcan can0: wait for bus off seq
[22894.677753] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready
[23278.654913] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.655116] mttcan c310000.mttcan can0: IR 0x8010000 PSR 0x785
[23278.655286] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.655430] mttcan c310000.mttcan can0: IR 0x8000000 PSR 0x785
[23278.655588] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.655731] mttcan c310000.mttcan can0: IR 0x8000000 PSR 0x785
[23278.655893] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.656064] mttcan c310000.mttcan can0: IR 0x8000000 PSR 0x785
[23278.656243] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.656387] mttcan c310000.mttcan can0: IR 0x8000000 PSR 0x785
[23278.656562] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.656702] mttcan c310000.mttcan can0: IR 0x8000000 PSR 0x785
[23278.656873] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.657015] mttcan c310000.mttcan can0: IR 0x8000000 PSR 0x785
[23278.657172] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.657314] mttcan c310000.mttcan can0: IR 0x8000000 PSR 0x7c5
[23278.657605] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.662498] mttcan c310000.mttcan can0: IR 0x8000000 PSR 0x7c5
[23278.668311] mttcan c310000.mttcan can0: Bit0 Error Detected
[23278.673899] mttcan c310000.mttcan can0: IR 0xa000000 PSR 0x70d
[23413.279535] mttcan c310000.mttcan can0: Bitrate set
[23518.008258] mttcan_controller_config: ctrlmode 31
[23518.008297] mttcan c310000.mttcan can0: Bitrate set
can anyone tell me how to read data

[KevinFFF]

Hi bhalgesanika,

Are you using the devkit or custom board for Xavier NX?
What’s your Jetpack version in use?

@bhalgesanika

pin 29 to tx of tj1050
pin31 to rx of tj1050

It seems not the expected result to me.
PIN29 and PIN31 are not CAN TX/RX for p3509 devkit board.

The guide you referred to is on “AGX Xavier devkit” rather than “Xavier NX devkit”

[bhalgesanika]

I am using devkit with jetpack 5.1.2 . Could you please tell me what pins am I supposed to use.

[KevinFFF]

For Xavier NX devkit, please connect your CAN device on J17 - Optional CAN Bus Header.
You can refer to Controller Area Network (CAN) — Jetson Linux Developer Guide documentation (nvidia.com) to configure it.