lcdk6748

You have allocated 0x800 or 2kB bytes for stack but the image_array of 256kB is declared on the stack. Also, SHRAM is only 128kB in size. The compiler cannot detect stack overrun due to large local variables. As George has mentioned.

You should move image_array off the stack. Make it a global rather than local variable. The compiler can check global memory usage.

To reduce memory usage, you can reduce image_array to an array of bytes instead of 4-byte "int". First read it in as a 4-byte int, then convert it to a byte.

You should check to see if the file opened successfully. You may be using fscanf with a null FILE handle.

I am problems posting reply since I tried posting a few hours agao. Try this again. Seems the forum doesn like me posting inline code but it seems okay with attachments. See the attached file:

#include <stdio.h>

unsigned char image_array[256*256]; // 256*256 = 64kB

int main()
{
  int i;
  int a;
  FILE *image;
  image = fopen("image_cameraman_tiff.txt","r");
  if(image == NULL)
  {
    printf("Open failed\n");
    return;
  }

  for(i=0;i<5;i++)
  {
    fscanf(image, "%d", &a);
    image_array[i] = (unsigned char)a;
  }
}