[Ovmsdev] Coding help

Michael Balzer dexter at expeedo.de
Mon Feb 15 15:36:51 HKT 2021


Am 14.02.21 um 16:42 schrieb Shane @ Kilve Engineering:
> can any one help me with a bit of code to retrieve ve some data from ecu can1/6f2  00 4c 00 00 01 97 bc 00 as i cant poll this ecu it just broadcasts when its active, ive tried polling it but does not respond, i need to choose one byte and allocate it to a PID.

I don't know what you mean by "allocating a byte to a PID", but if you 
want to process frames received directly, simply override 
IncomingFrameCan1() (or …2/3/4 depending on your bus).

Reduced example:

void OvmsVehicleXYZ::IncomingFrameCan1(CAN_frame_t *p_frame)
   uint8_t *d = p_frame->data.u8;

   switch (p_frame->MsgID)
     case 0x6f2:
       // for example, assuming the SOC is in byte 1:

If you're outside a vehicle context, you can register your own CAN 
receiver by creating a queue and calling MyCan.RegisterListener(). See 
the vehicle module for an example.


Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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