In commit https://github.com/linux-can/can-utils/commit/b153fe3f3591
("clang-tidy: sort includes alphabetically") the position of the "lib.h"
include has been moved in a way that struct canfd_frame has not been
defined anymore and lead to a warning when compiling cangen.c
This patch reverts that specific move and unifies the location of local
includes at the end of the include list.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
The Tindell's method used previously is incorrect. It does not account for
the fact that the stuffed bits are themselves also subject to bit stuffing.
Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This adds an algorithm for calculating the exact number of bits a CAN
frame occupies on the bus and uses this algorithm in canbusload. It
also moves the other methods for CAN frame length calculation, already
present in canbusload, to the new file.
The added algorithm calculates the exact number of stuffed bit in a
CAN frame. Note that in order to calculate that correctly, we must
also know the frame's CRC. Hence, the algorithm also includes CRC
calculation routine.
The correctness of the algorithm was verified on an oscilloscope for
several different SFF and EFF frames.
Currently only CAN frames are supported. For CANFD frames, a different
algorithm is needed. CANFD uses different CRC polynomials and
calculates the CRC from the staffed bit-stream (CAN calculates CRC
from de-stuffed bit-stream).
Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Kurt Van Dijck
Oliver Hartkopp
Rosen Penev
Yegor Yefremov
Michal Sojka