Flexcan - what does this line do?

[keith-i]

I'm trying to learn some of the Flexcan features and would like to understand what this line in the global section actually does in laymans terms.

static CAN_message_t msg;

It is sometimes as above and sometimes ends msg, rxmsg;. What does the extra rxmsg do?

[tonton81]

Receive message, its just a struct with the id, data, etc

[keith-i]

Thanks, but it's still a little over my head. Can you explain 'struct' to me?

[tonton81]

Its basically like a container that has multiple variables.

As an example above, these work:

msg.id;
msg.buf[0];
msg.flags.extended,

[keith-i]

Ok thanks, so presumably if you had inMsg in you struct you'd use inMsg.id; etc.
Why might you need two containers such as msg, rxmsg then

[skpang]

Ok thanks, so presumably if you had inMsg in you struct you'd use inMsg.id; etc.
Why might you need two containers such as msg, rxmsg then

msg use in transmit function.

rxmsg use in receive function.

[keith-i]

So does it matter what name you use or is it just rxmsg to help recognise it as a receive function. Could you say use txmsg instead of msg?

[tonton81]

Name can be anything you want it to be, like a variable, yeah

Txmsg is an example to let you know its a transmit message