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Diffstat (limited to 'Documentation/networking/can.txt')
| -rw-r--r-- | Documentation/networking/can.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/networking/can.txt b/Documentation/networking/can.txt index 05fd83bb3596..6ab619fcc517 100644 --- a/Documentation/networking/can.txt +++ b/Documentation/networking/can.txt @@ -372,6 +372,15 @@ solution for a couple of reasons: nbytes = sendto(s, &frame, sizeof(struct can_frame), 0, (struct sockaddr*)&addr, sizeof(addr)); + An accurate timestamp can be obtained with an ioctl(2) call after reading + a message from the socket: + + struct timeval tv; + ioctl(s, SIOCGSTAMP, &tv); + + The timestamp has a resolution of one microsecond and is set automatically + at the reception of a CAN frame. + Remark about CAN FD (flexible data rate) support: Generally the handling of CAN FD is very similar to the formerly described |