Flash Data Storage - initializer element is not constan

[trice8]

Hi,

i am trying to save data with the flash data storage module. Using this code (infocenter.nordicsemi.com/index.jsp from infocenter erverything works fine. But when i want to store my own value i get an "initializer element is not constant" error. The only thing i am changing is replacing

static uint32_t const m_deadbeef = 0xDEADBEEF;

with my own variable:

static uint32_t const m_deadbeef = (uint32_t)my_own_data;

my_own_data is defined outside the write function and populated during runtime. I am using "nRF5 SDK v13.0.0" with softdevice 132.

Any ideas? Thank you.

[FormerMember]

How is my_own_data defined?

Update: When writing data, it is record_chunk.p_data that needs the data. The easiest is to assign my_own_data directly to p_data:

record_chunk.p_data         = &my_own_data;

[trice8]

It's defined as:

uint8_t my_own_data;

in my .c file.

[FormerMember]

I have updated my answer.

[trice8]

That worked fine. Thanks!

[emdi]

When a variable is declared as constant in C, it has to be initialized at compile time. This means that the compiler has to be able to know the value you are assigning to the variable. However, you are attempting to a assign the value of a variable, which is not known at compile time. Thus, you receive an error during compilation.