Am 21.11.22 um 13:08 schrieb Marvin Ludersdorfer:
Hi,
I'm experiencing problems when trying to read out ECU parameters using istpsend when the response exceeds 8 bytes:
In one terminal, I run isotpdump -s 00000680 -d 00000780 -c -ta can0
Use isotprecv instead of isotpdump. isotpsend just sends the 3 bytes,
you pass to it and then is done.
The FC should then be sent by the socket, which is opened by isotprecv.
E.g.
terminal 1: isotprecv -s 00000680 -d 00000780 vcan0 <anything else>
terminal 2: echo 22 f1 95 | isotpsend -s 00000680 -d 00000780 vcan0
<anything else>
... your milage may vary though.
Regards
Andre
In another terminal, I run echo 22 F1 95 | isotpsend -s 00000680 -d 00000780 can0 -p 0x00
In the first terminal, I receive only the FF, but no FC frame is sent (expected is a 11-byte response).
If I turn around the communication direction and run isotpsend -s 00000680 -d 0000780 can0 -D 255, the target ECU answers correctly by sending the expected FC frame.
I would expect that isotpsend takes care of sending the FC frame in the first example as well to receive the full response - am I doing something wrong?
Any help would be highly appreciated!
Best regards,
Marvin Ludersdorfer
