On 18.03.2022 10:15:18, Marc Kleine-Budde wrote: > > > | $ ./can-calc-bit-timing --alg=can-next xilinx_dwnstrm -c 79999999 Bit > > > | timing parameters for xilinx_dwnstrm with 79.999999 MHz ref clock (cmd- > > > line) using algo 'can-next' > > > | nominal real Bitrt nom real SampP > > > | Bitrate TQ[ns] PrS PhS1 PhS2 SJW BRP Bitrate Error SampP SampP Error > > > | 1000000 12 29 30 20 1 1 999999 0.0% 75.0% 75.0% 0.0% > > > > Observed different BRP values for 1Mbps in here and below list for > > same sampling point. > > Yes. Seems I should update the table to clarify what they output. Here's the updated output. It says now "Data" Bit timing parameters in the 2nd table. | Bit timing parameters for xilinx_can_fd2i with 79.999999 MHz ref clock (cmd-line) using algo 'can-next' | nominal real Bitrt nom real SampP | Bitrate TQ[ns] PrS PhS1 PhS2 SJW BRP Bitrate Error SampP SampP Error | 1000000 12 29 30 20 1 1 999999 0.0% 75.0% 75.0% 0.0% | 800000 12 39 40 20 1 1 799999 0.0% 80.0% 80.0% 0.0% | 666666 12 47 48 24 1 1 666666 0.0% 80.0% 80.0% 0.0% | 500000 12 69 70 20 1 1 499999 0.0% 87.5% 87.5% 0.0% | 250000 25 69 70 20 1 2 249999 0.0% 87.5% 87.5% 0.0% | 125000 50 69 70 20 1 4 124999 0.0% 87.5% 87.5% 0.0% | 100000 50 87 87 25 1 4 99999 0.0% 87.5% 87.5% 0.0% | 83333 50 104 105 30 1 4 83333 0.0% 87.5% 87.5% 0.0% | 50000 100 87 87 25 1 8 49999 0.0% 87.5% 87.5% 0.0% | 33333 125 104 105 30 1 10 33333 0.0% 87.5% 87.5% 0.0% | 20000 250 87 87 25 1 20 19999 0.0% 87.5% 87.5% 0.0% | 10000 500 87 87 25 1 40 9999 0.0% 87.5% 87.5% 0.0% | | Data Bit timing parameters for xilinx_can_fd2i with 79.999999 MHz ref clock (cmd-line) using algo 'can-next' | nominal real Bitrt nom real SampP | Bitrate TQ[ns] PrS PhS1 PhS2 SJW BRP Bitrate Error SampP SampP Error | 12000000 12 2 2 2 1 1 11428571 4.8% 75.0% 71.4% 4.8% | 10000000 12 2 3 2 1 1 9999999 0.0% 75.0% 75.0% 0.0% | 8000000 12 3 3 3 1 1 7999999 0.0% 75.0% 70.0% 6.7% | 5000000 12 5 6 4 1 1 4999999 0.0% 75.0% 75.0% 0.0% | 4000000 12 7 7 5 1 1 3999999 0.0% 75.0% 75.0% 0.0% | 2000000 12 14 15 10 1 1 1999999 0.0% 75.0% 75.0% 0.0% | 1000000 25 14 15 10 1 2 999999 0.0% 75.0% 75.0% 0.0% regards, Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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