Heap size

[cricart]

Posted on January 11, 2017 at 11:32

Hi,

I'm working with a stm32f437VI. I need more heap memory. I changed the Heap size in de startup_stm32f427x.s (Heap_Size       EQU     0x00000200), but when I did a malloc and worked with the variable, and exception error happen.  I don't know if this is the way to increase the heap memory, or exsist other way. 

Thanks in advance,

[Khouloud GARSI]

Posted on January 11, 2017 at 13:14

Hi

Ricart.Carles

,

Could you please indicate the heap_size value you need to use.

Khouloud.

[cricart]

Posted on January 12, 2017 at 09:31

Hi,

I need to work with a 4kbytes .

carles.

[Khouloud GARSI]

Posted on January 13, 2017 at 19:22

Hi

Ricart.Carles

,

Hi I need more information for further investigation:

I did a malloc and worked with the variable, and exception error happen.

Could you please give as more details about the encountered error.

2. What IDE are you using?

Khouloud.

[cricart]

Posted on January 16, 2017 at 09:22

Hi,

I'm working with keil5.

The error is  a 'HardFault_Handler'.

When I increase the heap size in the way that I told you before, the compiler accepts the malloc. If I don't increase the memory, the compiler give me an error becouse the heap size is small than the memory allocated. This part looks fine, but when I work with the memory allocated, the exception error occurs. If I work with a small memory allocated (less than ->

Heap_Size       EQU     0x00000200)

 , the program works.But when I increase the allocated memory and increase the heap_size, the programs doesn't works.

carles.

[Khouloud GARSI]

Posted on January 17, 2017 at 16:22

Hi

Ricart.Carles

,

I do not see any issue that could cause this encountered hard fault.

Please share your code in order

toreproduce your case and

to identify what is going wrong.

Khouloud.

[Tesla DeLorean]

Posted on January 17, 2017 at 17:05

Simple question, what address does malloc() give you? How are you then accessing the memory? Are you casting to a structure pointer?

Show the specific code that is faulting. Ideally use a proper Hard Fault Handler instead of a while() loop

Present the problem in a fashion that can be solved, 'doesn't work' really doesn't help diagnose what is actually wrong.

[Tesla DeLorean]

Posted on February 09, 2017 at 16:50

This was resolved how?