topic Re: Response error for LIN communication in S32K

Response error for LIN communication

liuxing_hu — Mon, 20 Dec 2021 09:32:54 GMT

based on s32k118, ide is s32ds, generate lin code by lin stack

it's slave node from my side, the following is the requirements I need to achieve, I need to get these errors by APIs, and send errors to LIN, but I don't know how to get these errors or which API used by Lin stack, Could someone help me? thanks very much!

Re: Response error for LIN communication

namnguyenviet — Fri, 24 Dec 2021 07:14:53 GMT

Hello @liuxing_hu,

According to our LIN Stack developer, here is some information about handling the response error signal as below:

Each slave node shall publish a one bit scalar signal, named response_error, to the master node in one of its transmitted unconditional frames.
The response_error signal is set by linstack whenever a frame (except for event triggered frame responses) that is transmitted or received by the slave node contains an error in the frame response.
The response_error signal shall be cleared when the unconditional frame containing the response_error signal is successfully transmitted.

You can refer to chapter 2.7 of LIN_Specification_Package_2.2A.pdf to more detail.

One example about the response error signal is handled on bus:

Best Regards,

Nam

Re: Response error for LIN communication

liuxing_hu — Fri, 24 Dec 2021 09:33:58 GMT

Helllo @namnguyenviet

Thanks very much for your reply!

I don't really understand how the lin stack set respond error

Each slave node shall publish a one bit scalar signal, named response_error, to the master node in one of its transmitted unconditional frames.

I have 2 slave node, named SWSL and SWSR, in each slave node, the corresponding respond_err named SWSL_responseError and SWSR_responseError, is it ok? or the name must be response_error?

The response_error signal is set by linstack whenever a frame (except for event triggered frame responses) that is transmitted or received by the slave node contains an error in the frame response.

how does linkstack set response_error signal? does it need config previously ?

The response_error signal shall be cleared when the unconditional frame containing the response_error signal is successfully transmitted.

how and who clear the error signal?

i can see the respond error here, but I can't see the error status API by generate code, does anything wrong to my configuration?

Re: Response error for LIN communication

namnguyenviet — Fri, 24 Dec 2021 10:55:21 GMT

Hello @liuxing_hu

I have 2 slave node, named SWSL and SWSR, in each slave node, the corresponding respond_err named SWSL_responseError and SWSR_responseError, is it ok? or the name must be response_error?

[NXP] It is ok.

how does linkstack set response_error signal? does it need config previously ?

[NXP] The response_error signal has been defined in the .ldf file. The configuration tool(S32DS) will base on it to generate the configuration file as follows.

Whenever a frame that is transmitted or received by the slave node contains an error in the frame response the linstack(not user) will call to lin_update_err_signal() function to set.

how and who clear the error signal?

[NXP] Normally, the response_error signal shall be cleared by linstack(not user)when the unconditional frame containing the response_error signal is successfully transmitted.

However, the user can also use the definitions in the config file to set/reset the response_error signal as follows

i can see the respond error here, but I can't see the error status API by generate code, does anything wrong to my configuration?

[NXP] If you don’t have any error in your .ldf file, the generated configuration files will contain the same that I showed above.

Best Regards,

Nam

Re: Response error for LIN communication

liuxing_hu — Mon, 27 Dec 2021 06:10:08 GMT

our configuration tool(S32DS) not generates the configuration file as follows.

we have and use this as follow

we want to know how to use this to set/reset the response_error signal.

Re: Response error for LIN communication

namnguyenviet — Mon, 27 Dec 2021 07:01:39 GMT

Hello @liuxing_hu,

I'm afraid that you're having a misunderstanding. The reponse_error signal is handled internally by our LIN stack driver, and there is NO API to set/clear the reponse_error signal: The mechanism to set/clear the response_error signal is also handled internally and is explained in previous comment. In fact, we can "force" the stack to set the reponse_error bit each time the slave send the response, as below:

However, we don't recommend to do that, since it would break the whole stack: an response_error bit would be set even when there was no error, which is an abnormal behavior.

I have read again your question, and looks like you're asking for some functions which inject the fault into the bus, e.g. inject a bit error or a frame error,... Then unfortunately, our LIN stack doesn't provide any fault injection API. (The reponse_error bit only indicates whenever a fault was ALREADY occurred in the bus). You can use a test device (VECTOR Canoe, or NI LIN Interface,...) which support fault injection/bus disturbance.

Best Regards,

Nam

Re: Response error for LIN communication

liuxing_hu — Mon, 27 Dec 2021 11:24:04 GMT

Retell my question, now I want to call l_bool_wr_LI0_SWSL_responseError(1) when LINCurrentState->currentEventId is SYNC_ERROR,FRAME_ERROR CHECKSUM_ERROR IDENTIFIER_PARITY or BIT_ERROR occure.

plan A:

We call this function l_bool_wr_LI0_SWSL_responseError(1)

Plan B:

We want to write new function about get current Event ID in Lin_Ipuart_driver.c called by APPL Level.Like this

Another question,we have not found IDENTIFIER_PARITY_ERROR or BIT_ERROR,how to genarete the error or where to find the error

Re: Response error for LIN communication

namnguyenviet — Mon, 27 Dec 2021 11:32:53 GMT

I don't get it... You want to change the stack code, don't you?

now I want to call l_bool_wr_LI0_SWSL_responseError(1) when LINCurrentState->currentEventId is SYNC_ERROR,FRAME_ERROR CHECKSUM_ERROR IDENTIFIER_PARITY or BIT_ERROR occure.

Why do you want to implement like this? Because set the reponse_error bit to 1 is already handled in the stack code, so it's like re-inventing the wheel when doing like this

Best Regards,

Nam

Re: Response error for LIN communication

liuxing_hu — Tue, 28 Dec 2021 02:49:41 GMT

Show you our LIN ldf config

As your mean,we dont not modify the code.If there are some error

The SWSL_responseError shall be 1.So how to create the error to make SWSL_responseError value as 1

Re: Response error for LIN communication

namnguyenviet — Tue, 28 Dec 2021 03:01:43 GMT

Hello @liuxing_hu,

SWSL_responseError will be 1 if there is an error in the bus. So like my previous comment, you have to inject a fault in the bus if you want to verify the SWSL_responseError bit, and you need a test device, e.g. Vector CANOE or NI LIN interface... Our LIN stack does NOTHING with fault injection/ bus disturbance.

Please, make sure what is your target and carefully read what our team has suggested...

Best Regards,

Nam

Re: Response error for LIN communication

liuxing_hu — Tue, 28 Dec 2021 03:49:33 GMT

Hello @namnguyenviet

Thanks very much for your reply, I 'm not sure whether it is SWSL_responseError in my case when you say response error, so I confirm with you one more, now I understand what you means.

1. we have Vector CANOE, do you know how to verify SWSL_responseError using this tool, we never do that.

2. when set SWSL_responseError, I don't see the BIT-ERROR, INCONSISTENT-SYNC-FIELD-ERROR and IDENTIFIER-PARITY-ERROR, does lin stack driver support these 3 errors?

Re: Response error for LIN communication

namnguyenviet — Tue, 28 Dec 2021 08:00:10 GMT

Hello @liuxing_hu,

1. You can write a script then import to the Vector CANOE. You can refer to the Vector CANOE helper. Below is one of the syntax to create a bit inversed (as a result a bit error will be occurred):

Please ask VECTOR for further support.

2. INCONSISTENT-SYNC-FIELD-ERROR and IDENTIFIER-PARITY-ERROR are not reported by the stack, the frame is just ignored according to the LIN specification:

BIT-ERROR is supported.

Best Regards,

Nam

Re: Response error for LIN communication

liuxing_hu — Thu, 06 Jan 2022 07:18:01 GMT

How to set response error signal to 1 by using CANoe to create checksum error , frame error and so on.

Re: Response error for LIN communication

namnguyenviet — Thu, 06 Jan 2022 07:21:05 GMT

Hello @liuxing_hu,

We don't provide the CANoe tool, so we couldn't help you with this question. Please ask Vector to support this.

Best Regards,

Nam

Re: Response error for LIN communication

liuxing_hu — Tue, 11 Jan 2022 02:37:24 GMT

Hello ,

We want to do for the ECC .How to do ECC config for RAMT ,Flash memory and so on.

Re: Response error for LIN communication

namnguyenviet — Tue, 11 Jan 2022 07:38:47 GMT

Hello,

Please create a new thread with such a new question.

Best Regards,

Nam

Re: Response error for LIN communication

sharanabhiremath — Thu, 12 Mar 2026 11:35:19 GMT

In LIN 2.1 We have response Error signal which is mapped to a Specific LIN signal in LDF but if we need to map the other LIN signal along with previous one what is the way?