c++ - Storing 200kb of data in an array? -


i'm pretty new programming embedded applications (besides arduino stuff) , i'm working cc3220sf microcontroller texas instruments.

currently have program polling device , storing result. store 100,000 of these samples (each 2 bytes) giving me 200kb of data store. i'm not sure how should go doing this, trying make array of size [100][1000] crashes device.

how should go storing data later use?

#define max_arr_length                   1000 #define max_arr_depth                    100  // later in collection function: uint16_t measurmentsarr[max_arr_depth][max_arr_length] = {0}; unsigned int arr_length = 0; unsigned int arr_depth = 0;  // , later, after data point has // been verified useful: if (arr_length < max_arr_length){     measurmentsarr[arr_depth][arr_length++] = angle; } else {     arr_length = 0;     measurmentsarr[arr_depth++][arr_length] = angle; }

this ^^^ way works small arrays, said need store 200kb... know cc3220sf has 512kb use, how best write/read that?

respectfully, -james

chances sticking static in front of huge array makes work.

most compilers embedded systems place function-local variables on cpu stack, static variables have "static storage duration" , behave globals. linker knows how memory need, , try fit them in.

of course, static make function non-reentrant, couldn't allocate 2 200 kb arrays on 256 kb device anyway.


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