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canbusload: count databitrate seperately

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Signed-off-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
This commit is contained in:
Kurt Van Dijck
2021-06-24 14:44:50 +02:00
parent e319afb10f
commit 6382765bf6
3 changed files with 45 additions and 6 deletions
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canframelen.c
+29 -2
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@@ -236,13 +236,40 @@ static unsigned cfl_exact(struct can_frame *frame)
3; /* IFS */
}
unsigned can_frame_dbitrate_length(struct canfd_frame *frame, enum cfl_mode mode, int mtu)
{
if (mtu != CANFD_MTU || !(frame->flags & CANFD_BRS))
return 0;
switch (mode) {
case CFL_NO_BITSTUFFING:
return 1 /* brs/crcdel */ + 1 /* esi */ + 4 /* dlc */ +
((frame->len >= 16) ? 21 : 17) +
frame->len * 8;
case CFL_WORSTCASE:
return can_frame_dbitrate_length(frame, CFL_NO_BITSTUFFING, mtu) * 5 / 4;
default:
return 0;
}
}
unsigned can_frame_length(struct canfd_frame *frame, enum cfl_mode mode, int mtu)
{
int eff = (frame->can_id & CAN_EFF_FLAG);
if (mtu != CAN_MTU)
return 0; /* CANFD is not supported yet */
if (mtu == CANFD_MTU)
/* not correct, but close ? */
switch (mode) {
case CFL_NO_BITSTUFFING:
return 1 + (eff ? 29 : 11) + ((frame->len >= 16) ? 21 : 17) +
5 /* r1, ide, edl, r0, brs/crcdel, */ + 12 /* trail */ +
frame->len * 8;
case CFL_WORSTCASE:
return can_frame_length(frame, CFL_NO_BITSTUFFING, mtu) * 5 / 4;
case CFL_EXACT:
return 0; /* exact bittiming for CANFD not supported yet */
}
else if (mtu != CAN_MTU)
return 0; /* Only CAN2.0 and CANFD supported now */
switch (mode) {
case CFL_NO_BITSTUFFING: