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Resolve "SSP offset feature test"

Closes #205

See merge request !312

On high data bit-rates this is needed!

If error is forced on 5th bit of error delimiter, this will be already
after error frame of the other node, so next error frame will hit Error
delimiter of the other node. Due to this, the other node will transmit
next error frame and thus after bus is idle, REC will be incremented
twice. This is not a bug, but check of REC must be done directly after
error is sampled!

doc: Fix datasheet link

Closes #205

See merge request !311

Resolve "SSP offset feature test"

Closes #205

See merge request !306

Keep bit 31 of generated TS equal to 0. This is to avoid
overflow on numeric conversion of 31 bit unsigned vector
to natural.

Here after ACK we can be in EOF if sent frame is FD frame!

Now TEC/REC should be incremented by 8 after 14 dominant bits
long error flag and by 8 after each next 8 bits!

When we don't transmitt anything, keep IDE in Arbitration field,
not in Control field! This is better because we won't receive
short is_control pulse for the duration of IDE bit!! We don't mind
that in case of Error, this will be always interpreted as error in
Arbitration field even if BASE frame is being received!

This is needed since we hardcode the ID in first bits. Extended
ID is needed so that we don't overflow base ID limit!

when node is in Overload frame.

When in overload frame, TXT Buffer should have been long unlocked!

If bit error occurs in last bit of Error flag, then Error frame
request, due to Pipeline DFF will occur at first cycle of Error delimiter!
Thus we can't check for it so heavily...

This is needed since default delay can be too high for some
bit-rates! Units will not manage to received ACK in time!

Each error now kills the test by "error" log!

Resolve "Driver documentation acknowledge the project funding"

Closes #348

See merge request !310

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

driver: Try to include checkpatch in linux driver makefile.

Closes #346

See merge request !308

This reverts commit dad3ed7d.