some question about function Can_43_FLEXCAN_Ipw_MainFunction_Read

[yin_qiu]

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.

[PetrS]

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

[yin_qiu]

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/201...
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?

[PetrS]

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

[yin_qiu]

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.

[PetrS]

Hi,

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

BR, Petr

[yin_qiu]

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.

[PetrS]

Hi,

sorry but I have neither GHS nor Python.

BR, Petr 

[yin_qiu]

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

[yin_qiu]

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

[yin_qiu]

https://community.nxp.com/t5/S32K/ECU-jump-into-hard-fault-if-receive-frame-in-polling-mode/td-p/201...
hello ,I met the hardfault problem and I think the reason maybe related with the missing static here.