S12 / MagniV MicrocontrollersのトピックSending Large amounts of data In MSCAN.

Sending Large amounts of data In MSCAN.

Saud — Thu, 27 Jul 2006 17:21:28 GMT

suppose i want to send 256 bytes of data at a go on the CAN bus ,what is the best strategy to do so ?
Currently what i am doing is reloading the CAN buffer registers after sending 1 frame in the transmit ISR and recalling the Send routine and this goes on till all bytes are transmitted.

Re: Sending Large amounts of data In MSCAN.

Bibi — Thu, 27 Jul 2006 17:45:20 GMT

hi,

Acording to the CAN specification you can only send 8 bytes in a frame.

So I think the way you send your data is a good one.

But you can also write your data in a global large buffer, enable the transfert of a frame and use the Tx interrupt to enable the transfert of the other data.

Re: Sending Large amounts of data In MSCAN.

Alban — Fri, 28 Jul 2006 16:51:24 GMT

Yo,

That's where the X-Gate will be nicely used !

You would give it the buffer of data and it would send all the CAN packets by 8 without the CPU having to worry about anything.

Neat

Alban.