S32KのトピックRe: S32K1 LIN stack - diagnostic slave response

S32K1 LIN stack - diagnostic slave response

Francesco_Solito — Fri, 30 Jun 2023 07:43:04 GMT

Good morning

I'm making a slave device and I'm using LIN stack.

How can I check that a slave response has been phisically sent on LIN bus?

For instance, when I receive a reset diagnostic frame (11 01), I parse it with ld_receive_message() and I prepare the response with ld_send_message(); then I have to really reset the microprocessor, but only after I'm sure that the slave response was really sent on bus. How can I check that the response was sent on bus? ld_send_message() only prepares the response, but this does not mean that it was phisically sent on bus.

As regards normal frames (not diagnostic), what is the way to ensure the same thing? (I mean, be sure that the response to a frame was really sent on bus).

Thank you in advance and kind regards,

Francesco Solito

Re: S32K1 LIN stack - diagnostic slave response

DanNguyenDuy — Thu, 06 Jul 2023 14:23:27 GMT

Hi @Francesco_Solito,

For instance, when I receive a reset diagnostic frame (11 01), I parse it with ld_receive_message() and I prepare the response with ld_send_message(); then I havesss to really reset the microprocessor, but only after I'm sure that the slave response was really sent on bus. How can I check that the response was sent on bus? ld_send_message() only prepares the response, but this does not mean that it was phisically sent on bus.

=> As far as I know, you can use ld_raw_tx_status() function to check the status of tx_queue.

tx_queue will be updated with data after you call ld_send_message() and will be cleaned after it is transmitted.

Please refer the chapter 7.4.3.3 of LIN_Specification_Package_2.2A.pdf to more detail.

As regards normal frames (not diagnostic), what is the way to ensure the same thing? (I mean, be sure that the response to a frame was really sent on bus).

=> For Unconditional frame, you can use l_flg_tst() to check status. The flag will be set when the frame is successfully transmitted from the node.

Please refer the chapter 7.2.3 of LIN_Specification_Package_2.2A.pdf to more detail

Best regards,

Dan

Re: S32K1 LIN stack - diagnostic slave response

Francesco_Solito — Mon, 10 Jul 2023 08:20:05 GMT

Thank you very much. I'll try both suggestiones.

Kind regards,

Francesco