S12 / MagniV MicrocontrollersのトピックRe: CAN implementation on S12XEP100 using code warrior

CAN implementation on S12XEP100 using code warrior

Vijay1987 — Tue, 24 Jan 2012 15:43:36 GMT

Hi all,

I've just started using the 9S12XEP100 evaluation board along with processor expert. I was able to access the basic I/O's ( using processor expert) and implement stateflow generated code into code warrior.

Now, I need to use the CAN of the board. I've referred to the documentation on MSCAN with register and bit level information on implementation of CAN. However, I was not able to find any documentation on implementing CAN using processor expert.

My basic task is to send and recieve CAN message to/from the device. Please help me with links for good documentation or examples if any.

Thanks

Vijay.

Re: CAN implementation on S12XEP100 using code warrior

ProcessorExpert — Tue, 24 Jan 2012 16:20:08 GMT

Hello,

you can find the documentation including some examples in the component´s help available through Help command from component´s pop-up menu.

Please also find it also attached.

best regards
Vojtech Filip
Processor Expert Support Team

Re: CAN implementation on S12XEP100 using code warrior

Vijay1987 — Wed, 25 Jan 2012 12:56:50 GMT

Hi Filip,

I have already gone through the PE documentation. I have also tried using the method:3 ( pollling method) of sending CAN messages. But unfortunately i see no success.

When I include the line "CAN1_SendFrame(0,0x512, DATA_FRAME, 8, data); ", in the main program, it gives me a warning during compilation, which says

Warning : C1420: Result of function-call is ignored

test_sflw.c line 57

Is there some more detailed explanation of sending and recieving CAN messages using PE, and integrating it with other codes?? If so, please help me with the links for the same.

Meanwhile, I'm trying it out from my end and would post if I succeed.

Regards,

Vijay.

Re: CAN implementation on S12XEP100 using code warrior

kef — Wed, 25 Jan 2012 14:06:30 GMT

Warning : C1420: Result of function-call is ignored

^^ means that what function returns is ignored by you. To suppress the warning, either assign result of function call to variable, or typecast it to void.:

a = foo();

(void)foo();

Re: CAN implementation on S12XEP100 using code warrior

Vijay1987 — Wed, 25 Jan 2012 14:14:22 GMT

Hi kef,

Yes, I have done that. I have defined "temp" and modified the code as follows

temp=CAN1_SendFrame(0, 0x512, DATA_FRAME, 8, data);

There is no warning now. It is getting compiled. But, when I am trying toaccess the CAN bus via external device ( PAN), I see no messages being transmitted by the EVAL board!!

I wonder what the problem is.The code only has CAN_SendFrame in it! Hope I can debug this soon.

Regards

Vijay.