topic some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read in S32K

some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

yin_qiu — Sat, 04 Jan 2025 03:06:54 GMT

dear NXP experts:

I have a question while taking use of EB Mcal version as SW32K3_S32M27x_RTD_R21-11_4.0.0_P04.

in the function "Can_43_FLEXCAN_Ipw_MainFunction_Read" located in file "Can_43_FLEXCAN_Ipw.c"

a local variable "ReceivedDataBuffer" is defined without adding "static ", but in the previous Mcal version like 1.0.0 ,static is added, so I want to know the reason .

if there is no static ,the local ReceivedDataBuffer will be assign a random address and the address of pMBmessage will not equal to the ReceivedDataBuffer.

thank you very much.

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

yin_qiu — Mon, 06 Jan 2025 08:58:30 GMT

https://community.nxp.com/t5/S32K/ECU-jump-into-hard-fault-if-receive-frame-in-polling-mode/td-p/2019905
hello ,I met the hardfault problem and I think the reason maybe related with the missing static here.

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

PetrS — Tue, 07 Jan 2025 08:58:43 GMT

Hi,

the keyword “static” was removed from those variables in order to support multicore/multithread feature, as those variables will be put into stack, and because each core will have their own stack in multicore environment, so those variables will not be concurrently accessed.
See ARTD-24436 in RTD release note.

BR, Petr

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

yin_qiu — Tue, 07 Jan 2025 10:44:10 GMT

dear Petrs:
thanks pretty much for answering my question.
I take use of the mcal in S32K312 and meet an hardfault problem and I logged my debug information here:
https://community.nxp.com/t5/S32K/ECU-jump-into-hard-fault-if-receive-frame-in-polling-mode/td-p/2019905
after adding "static",ECU will not go hardfault. could you pls check the debug infor and help me to check if "static "is the root cause?

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

PetrS — Fri, 10 Jan 2025 13:15:25 GMT

Hi,

maybe there is issue with Stack or similar. To say more, share simplified full project indicating an issue so we can check/test.

BR, Petr

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

yin_qiu — Sat, 11 Jan 2025 08:25:02 GMT

hello,Petrs:

yes, I tried to set a large size of stack, but it seems make no sense and I also check the contents of stack by S32DS when mcu jump into hardfault and I also find the contents in the top area of the stack is "FF", so it seems the stack is not overflow.

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

PetrS — Mon, 13 Jan 2025 11:57:41 GMT

Hi,

OK then as I wrote, share simplified full project indicating an issue so we can check/test.

BR, Petr

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

yin_qiu — Mon, 13 Jan 2025 13:39:31 GMT

hello PetrS:

I upload the file,and if there is no FS23 in your board ,you can delete the FS23 folder and some related include item.

you may config the "ToolPath.mk" for adjust the compiler(ghs) and python (I take use of python27).

thank you very much.

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

yin_qiu — Mon, 13 Jan 2025 13:43:47 GMT

hi I am not sure if the project is upload successful. ahd upload again

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

PetrS — Wed, 15 Jan 2025 13:48:24 GMT

Hi,

sorry but I have neither GHS nor Python.

BR, Petr

Re: some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

yin_qiu — Fri, 17 Jan 2025 06:14:03 GMT

hi PetrS：
could you pls help me to analysis the cycle of Can_43_FLEXCAN_MainFunction_Read(), any side effect will happen if it is located in while(1)?
or is it must be located in 10ms task?
thanks a lot