Memory mapping in generated Autosar compliant C code with MATLAB

Question

Adam 2022-10-25

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1834593-memory-mapping-in-generated-autosar-compliant-c-code-with-matlab

评论： Djordje 2024-7-17，8:56

I am trying to solve my issue as to generate an AUTOSAR compliant C code form MATLAB. I successfully created memory segments around vars/functions, like this:

#define CAN_START_SEC_VAR_8BIT

#include “MemMap.h”

static uint8 myvar_1;

#define CAN_STOP_SEC_VAR_8BIT

#include “MemMap.h”

#define CAN_START_SEC_VAR_8BIT

#include “MemMap.h”

static uint8 myvar_2;

#define CAN_STOP_SEC_VAR_8BIT

#include “MemMap.h”

What I can not figure out, and I would be really grateful if you could lend a hand here is that: For all the different functions/vars a new memory segment opens and close. Even if the segment is the same. This is bad, because it takes time to read multiply times the same opening and closing segments. Do you know any way to prevent this and group those vars/functions within the same memory segment, which have matching starting and closing segment? so it would be like this:

#define CAN_START_SEC_VAR_8BIT

#include “MemMap.h”

static uint8 myvar_1;

static uint8 myvar_2;

#define CAN_STOP_SEC_VAR_8BIT

#include “MemMap.h”

I looked into:

>> cscdesigner

and

App -> AUTOSAR Component... -> Settings -> C/C++ Code Generation options -> Code generation

But could not find anything for this issue.

Thanks a lot for any advice and have a good day!

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Giosué Carducci 2023-6-14

Hi,

could you share the model?

I have an issue while I try to define that stati variables.

Please, could you help me?

I can find also a way to put both variables in only one memory section.

Thanks

Giosuè

Djordje 2024-7-17，8:56

Hello,

Could you please explain procedure to create memory segments:

"I successfully created memory segments around vars/functions"

BR,

Djordje

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Answer 1

Riad 2023-9-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1834593-memory-mapping-in-generated-autosar-compliant-c-code-with-matlab#answer_1308196

Hello,

If I understand well, you want that the pragma is written for a group of vars. If so, you should set the property 'PragmaPerVar', in the Simulink.MemorySectionDefn (in the cscdesigner script) to false:

set(h, 'PragmaPerVar', false);