AURIX™ Forum Discussions

[Sara_V]

Hi there, 

I wonder if everyone has my same problem or has  resolve it. I implemented on TC375 a CAN communication - I set the can module on TC375 as a receiver one. My aim is to obtain, for every received message, the timestamp of the message itself.

I thought to associeted, every time the interrupt routine of received message was triggered, a subroutine which use STM0_TIM0 register, but i have some problems, the number obtained it's not easily understandable.

There are other ways to extract time stamp of messages on CAN bus communication for TC375?

A specific library for example or similar?

[dw]

On start of frame reception / transmission the counter value is captured and stored into the timestamp section
of an Rx Buffer / Rx FIFO (RXTS[15:0]) or Tx Event FIFO (TXTS[15:0]) element.

You can check the RX Buffer for timestamp. Do you have any question on this?

[Sara_V]

Hi!

thank you so much for the answer. So yes, I have some question about:

I initialize Rx Buffer (or Tx Buffer) during the configuration of MCAN, my question is which command can I use to log into Buffers?

I try to explain myself better:

There is a kind of structure in which I can extract an attribute?

or do I need to use more specific command to log into?

thank you so much for patience 

[dw]

Please check below struct for R1.

[dw]

IFX_INLINE uint32 IfxCan_Node_getDataLengthCode(Ifx_CAN_RXMSG *rxBufferElement)
{
    return (IfxCan_DataLengthCode)rxBufferElement->R1.B.DLC;
}

Above call is for your reference. You should modify as your request.

[Sara_V · Accepted solution]

Thank you so much! 

I make a recap in order to verify i really understand:

I initialize the stucture _Ifx_Can_RxMsg, then I do the same with the interrupt 

IfxCan_Node_getDataLengthCode

and in this way i get the time stamp of the arrived message.

I have a question: if i initialize the structure and than every time i call the interrupt of received message i use as and example:

readCanMsg(...);

msgID = rxMsg.messageId;

time_stamp = 

(IfxCan_DataLengthCode)rxBufferElement->R1.B.DLC;

Can I do this, right?

[dw]

Hi Sara, Yes you can do this, please note that DLC is not timestamp, you should modify the code.

[Sara_V]

Oh, sorry, how silly!

So maybe I didn't get which available variable the time information was stored? 

Referring to my "pseudo code" : time_stamp will be equal to what?

I can't get it 

thank you so much for your patience