[Ovmsdev] SWCAN

[Alexander K]

NCV7356 is compliant to GMW3089.
Also TH8056 has two versions with 8 and 14 pins. Both are suitable.

пн, 23 мая 2022 г. в 10:40, Mark Webb-Johnson <mark at webb-johnson.net>:

> Discussing with the manufacturer, feedback is:
>
>
>    - Given component vs board manufacturing cost, it seems simplest to
>    combine this with the existing k-line option board, to produce a new
>    ‘combo’ option board containing both K-line and SWCAN (DIP switch
>    selectable one or the other, not both).
>
>    - The TH8056 component is causing issues. Availability is poor (in
>    China) and price is very high.
>
>
> Does anyone know of any alternative to the TH8056 that can be suggested?
> Any other comments on this?
>
> Regards, Mark.
>
> On 18 May 2022, at 8:55 AM, Mark Webb-Johnson <mark at webb-johnson.net>
> wrote:
>
>
> Regarding:
> https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/704
>
> Marko did some work on the back in 2019, and helpfully published under MIT
> license here:
>
> https://github.com/mjuhanne/OVMS-SWCAN
>
>
> Very grateful for that.
>
> Now, the Bolt EV people are asking for this.
>
> In general, it seems that we can do a simple board in the same way as the
> K-Line was done. Use the two available GPIOs (one for INT and the other
> CS). Then the GPIOs on the MCP2515 to control the transceiver mode. Expose
> the single SWCAN pin on the DB9, in the same way as K-Line does it. GND
> (for SWCAN-low) is already available there.
>
> Anybody see any problems with that approach?
>
> I am happy to arrange the hardware, given sufficient interest, but have
> almost no way of testing (as none of the cars I have access to have SWCAN).
>
> Regards, Mark.
>
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