Re: About bittiming calculation result

Hi Tomoya,

On 02/08/2011 02:27 AM, Tomoya MORINAGA wrote:

On Tuesday, February 08, 2011 12:53 AM,  Wolfgang Grandegger wrote:

quoted

BTW, it's always possible to specify optimized bit-timing 
parameters directly, e.g. the following seem better:

   800000     60  12    4    4   4   3  793650  0.8% 80.0% 81.0%  1.2%

You could set these with:

  $ ip link set can0 type can \
    tq 60 prop-seg 12 phase-seg1 4 phase-seg2 4 sjw 4

I can confirm 800K comms works well using the above.

Cool, I got these magic values from a CAN hardware expert.

I wish Can-core could calculate like above.

Me too! I also got some indication on how to improve our algorithm in
case the bit-rate does not match. Hope to find some time soon to work
on this issue.

quoted

quoted

seg1/seg2/sjw/prop_seg must be more than 1 ?

BTW, according to EG20T PCH data sheet, 
CAN bit-timing parameters(BRP, Prop_Seg, Phase_Seg1, Phase_Seg2, SJW) must not be set 0.

OK, then please provide a patch setting tseg1_min to 2.

Wolfgang.