warning when make modules_install

[hsilva7]

I followed the instructions to install the module, in which I get a warning and the module isn't installed.

I am on a beagle bone black with kernel 4.19.24-ti-r10

this is what I get after running sudo make modules install

make -C /lib/modules/4.19.24-ti-r10/build M=/home/debian/can-isotp modules_install
make[1]: Entering directory '/usr/src/linux-headers-4.19.24-ti-r10'
  INSTALL /home/debian/can-isotp/net/can/can-isotp.ko
  DEPMOD  4.19.24-ti-r10
Warning: modules_install: missing 'System.map' file. Skipping depmod.
make[1]: Leaving directory '/usr/src/linux-headers-4.19.24-ti-r10'

[hartkopp]

Hm - these are standard tools that usually find a System.map in the /boot directory.

Don't know where the BBB hosts its System.map

Please check where to find that file and refer it when invoking "depmod" by hand. E.g. "depmod -a -F /boot/System.map-4.19.24-ti-r10"

[hsilva7]

Not sure what you mean by running by hand... I have run depmod -a -F /boot/System.map-4.19.24-ti-r10 and the file does exist. The command just executes and exit without any result.

[hartkopp]

Ok, that should have worked then - and modprobe can-isotp should run without problems.

Usually the sytem map is located in /lib/modules// therefore the default process obviously failed probably as you just worked on base of the linux-headers.

[hsilva7]

Ok, thank you.

Assuming that everything is right, I am trying to run echo "45 69 6e 65 20 73 65 68 72 20 6c 61 6e 67 65 20 4e 61 63 68 72 69 63 68 74" | isotpsend -s 321 -d 123 vcan0 and isotpdump -c -a -s 321 -d 123 vcan0 I expected to get vcan0 321 [8] [FF] ln: 25 data: 45 69 6E 65 20 73 - 'Eine s' vcan0 123 [3] [FC] FC: 0 = CTS # BS: 0 = off # STmin: 0x00 = 0 ms vcan0 321 [8] [CF] sn: 1 data: 65 68 72 20 6C 61 6E - 'ehr lan' vcan0 321 [8] [CF] sn: 2 data: 67 65 20 4E 61 63 68 - 'ge Nach' vcan0 321 [6] [CF] sn: 3 data: 72 69 63 68 74 - 'richt'

but I only get can0 321 [8] [FF] ln: 25 data: 45 69 6E 65 20 73 - 'Eine s'

[hartkopp]

Yes. You need a isotprecv to receive the data stream too.

[hartkopp]

Seems to be fixed ...

[litaoxyz]

Ok, thank you.

Assuming that everything is right, I am trying to run echo "45 69 6e 65 20 73 65 68 72 20 6c 61 6e 67 65 20 4e 61 63 68 72 69 63 68 74" | isotpsend -s 321 -d 123 vcan0 and isotpdump -c -a -s 321 -d 123 vcan0 I expected to get vcan0 321 [8] [FF] ln: 25 data: 45 69 6E 65 20 73 - 'Eine s' vcan0 123 [3] [FC] FC: 0 = CTS # BS: 0 = off # STmin: 0x00 = 0 ms vcan0 321 [8] [CF] sn: 1 data: 65 68 72 20 6C 61 6E - 'ehr lan' vcan0 321 [8] [CF] sn: 2 data: 67 65 20 4E 61 63 68 - 'ge Nach' vcan0 321 [6] [CF] sn: 3 data: 72 69 63 68 74 - 'richt'

but I only get can0 321 [8] [FF] ln: 25 data: 45 69 6E 65 20 73 - 'Eine s'

I have the same problem with you. how did you solved?

[hartkopp]

isotpsend and isotpdump are not sufficient to perform a proper isotp data transfer. Your need isotpsend AND isotprecv as already stated here https://github.com/hartkopp/can-isotp/issues/15#issuecomment-505869073 . isotpdump ist just to dump contents (read-only) - so there's no communication counterpart, like isotprecv.