# bash: CONFIG\_MTTCAN: command not found **URL:** \ **Category:** Jetson TX2\ **Created:** [August 29, 2019, 7:00am UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814 "2019-08-29T07:00:17Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![1092561946](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1092561946](https://forums.developer.nvidia.com/u/1092561946)\ **Post date:** [August 29, 2019, 7:00am UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/1 "2019-08-29T07:00:17Z")
I want use can bus in TX2.and I find some answer from here: [how can I use CAN bus in TX2? - Jetson TX2 - NVIDIA Developer Forums](https://devtalk.nvidia.com/default/topic/1006762/jetson-tx2/how-can-i-use-can-bus-in-tx2-/3) It is mentioned that: These are the steps can be followed to enable and check CAN on TX2. 1. Enable kernel support for mttcan(Other required modules are already supported) ​ CONFIG\_MTTCAN = m (Here mttcan is compiled as a module) 2. Insert CAN BUS subsystem support module. modprobe can … so I enter the command:CONFIG\_MTTCAN = m in the terminal and feedback this: bash: CONFIG\_MTTCAN: command not found I want know how to use this command?thanks ---
**Author:** ![shgarg](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shgarg/32/9748_2.png) [@shgarg](https://forums.developer.nvidia.com/u/shgarg)\ **Post date:** [August 29, 2019, 7:17am UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/2 "2019-08-29T07:17:43Z")
Hi, Please use below command to insert mttcan: $ modprobe mttcan Thanks, Shubhi ---
**Author:** ![1092561946](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1092561946](https://forums.developer.nvidia.com/u/1092561946)\ **Post date:** [August 29, 2019, 8:20am UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/3 "2019-08-29T08:20:38Z")
Hi, I use this command: $ modprobe mattcan terminal feedback this: modprobe: ERROR: could not insert ‘mttcan’: Operation not permitted ---
**Author:** ![shgarg](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shgarg/32/9748_2.png) [@shgarg](https://forums.developer.nvidia.com/u/shgarg)\ **Post date:** [August 29, 2019, 8:24am UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/4 "2019-08-29T08:24:27Z")
Hi, Please use sudo : $ sudo modprobe mttcan Thanks, Shubhi ---
**Author:** ![1092561946](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1092561946](https://forums.developer.nvidia.com/u/1092561946)\ **Post date:** [August 29, 2019, 8:51am UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/5 "2019-08-29T08:51:14Z")
thanks,it could be work. but I have a know problem,I executed the following orders: $ sudo modprobe mttcan $ sudo modprobe can $ sudo modprobe can\_raw $ sudo ip link set can1 type can bitrate 500000 dbitrate 2000000 berr-reporting on fd on $ sudo ip link set up can1 then I use ifconfig could find can1.I want use this port send command to another equipment.bitrate also set as 500000.i use CAN transceiver to connect can1 and external equipment and run command: $ cansend can1 101#001E00100001 #no action no feedback $ sudo cansend can1 101#001E00100001 #no action no feedback so I excuted command: $ ip -s -d link show can1 feedback this: 12: can1: \ mtu 72 qdisc pfifo\_fast state DOWN mode DEFAULT group default qlen 10 link/can promiscuity 0 can \ state BUS-OFF (berr-counter tx 248 rx 0) restart-ms 0 bitrate 500000 sample-point 0.875 tq 25 prop-seg 34 phase-seg1 35 phase-seg2 10 sjw 1 mttcan: tseg1 2…255 tseg2 0…127 sjw 1…127 brp 1…511 brp-inc 1 dbitrate 2000000 dsample-point 0.750 dtq 25 dprop-seg 7 dphase-seg1 7 dphase-seg2 5 dsjw 1 mttcan: dtseg1 1…31 dtseg2 0…15 dsjw 1…15 dbrp 1…15 dbrp-inc 1 clock 40000000 re-started bus-errors arbit-lost error-warn error-pass bus-off 0 2 0 1 1 0 RX: bytes packets errors dropped overrun mcast 40 5 2 0 0 0 TX: bytes packets errors dropped carrier collsns 0 0 0 0 0 0 ---
**Author:** ![shgarg](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/shgarg/32/9748_2.png) [@shgarg](https://forums.developer.nvidia.com/u/shgarg)\ **Post date:** [August 29, 2019, 9:00am UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/6 "2019-08-29T09:00:29Z")
Hi, Can you please explain me your connections? How did you connect CAN0 & CAN1 from TX2? On CAN BUS, minimum two CAN nodes should be present to transmit msg on CAN BUS ---
**Author:** ![1092561946](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1092561946](https://forums.developer.nvidia.com/u/1092561946)\ **Post date:** [August 29, 2019, 9:32am UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/7 "2019-08-29T09:32:47Z")
I have a CAN transceiver model.I connected one end to the CAN pin of J26 and the other end to the external device.Hardware connection should be ok，because if I use can1 as a can receiver equipment:I excuted command: $ candump can1 then I can receiver message from external device to TX2.I just don’t konw how to send command from TX2 to my external device. ---
**Author:** ![1092561946](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1092561946](https://forums.developer.nvidia.com/u/1092561946)\ **Post date:** [August 30, 2019, 12:32pm UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/8 "2019-08-30T12:32:44Z")
maybe I has sovle the this problem bu I don’t do anything .I set it up once as before, but today is OK.It’s very strange ---
**Author:** ![nadeemm](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/nadeemm/32/367020_2.png) [@nadeemm](https://forums.developer.nvidia.com/u/nadeemm)\ **Post date:** [October 18, 2021, 6:33pm UTC](https://forums.developer.nvidia.com/t/bash-config-mttcan-command-not-found/80814/9 "2021-10-18T18:33:44Z")
Closed on October 18, 2021, 6:33pm UTC