On Jan 19, 2016, at 9:35 AM, Guenter Ebermann <guenter.eberm...@googlemail.com>
wrote:
> I asked Hannes about DLT_FLEXRAY.
> He told me that they currently dont use pcap for FlexRay and have only
> used it in a limited scenario and that we are free to change the
> layout.
> The format represented the bitsream from the bus 1:1 without an
> additional header.
> The only deviation was the padding: the data was padded to align to 4
> byte boundaries.
>
> This is my suggestion for an extension:
>
> I want to extend the frame by a "measurement-header": This header is
> added by the measurement device. It contains one bit for the FlexRay
> channel (A or B), a "data-type" enumeration and error-flags.
OK, so the new format is that the frame begins with a measurement header, which
is followed by the bitstream from the bus?
Is the bitstream from the bus padded in that fashion?
>From the Wikipedia article on FlexRay (the first of the ISO standards the
>article mentions costs CHF 118, so I'm not going to buy them immediately):
https://en.wikipedia.org/wiki/FlexRay
a frame consists of some framing bits at each end of the frame, with each octet
in the frame containing 2 bits of per-byte framing followed by the 8 bits of
the octet. Would LINKTYPE_FLEXRAY/DLT_FLEXRAY frames include all of those
bits? If so, where does the padding appear?
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