Writing an image SD card

[KamilTomaszewski]

Hi @sskcyber01

Try to increase the stack size of your application

• Run make menuconfig
• Go to Application Configuration -> Spresense SDK -> Examples
• Find your application and change the stack size from 2048 to 8192
• Select <Save> and <Exit>
• Build your app again

Best Regards,
Kamil Tomaszewski

[sskcyber01]

Thank you for the response @kamiltomaszewski. The application worked successfully by changing the STACKSIZE within the Makefile. Is there any maximum STACKSIZE for running an application ?

Thanks in advance .

[KamilTomaszewski]

Hi @sskcyber01,

There is no maximum for STACKSIZE, but you have to fit into Spresense RAM.

Best Regards,
Kamil Tomaszewski

[Bhalaji Kharthik]

@KamilTomaszewski I tried changing the stack size value in makefile of my project yet I'm encountering same dump errors. Is the above way you mentioned the only way to change stack size?

[KamilTomaszewski]

Hi @Bhalaji-Kharthik

The method I described is recommended. If you use my method instead of modifying the Makefile do you get this error?

Best Regards,
Kamil Tomaszewski

[Bhalaji Kharthik]

@KamilTomaszewski i tried executing make menuconfig but I get this error "make: *** No rule to make target 'menuconfig'. Stop.". Do you know any means to rectify it?

[KamilTomaszewski]

Hi @Bhalaji-Kharthik When you try to run this command, are you under spresense/sdk?

[Bhalaji Kharthik]

@KamilTomaszewski Now the command is running fine but I am not able to access projects outside spresense/sdk folder

[KamilTomaszewski]

@Bhalaji-Kharthik That's good. Do you mean you don't see configuration of your application which is outside the spresense directory in menuconfig?

[Bhalaji Kharthik]

This post is deleted!

[Bhalaji Kharthik]

@KamilTomaszewski yes, I am only able to see applications within spresense/sdk folder

[KamilTomaszewski]

Hi @Bhalaji-Kharthik

How did you configure your application before?

Could you please send me a link to the documentation you used to create your project?

Best Regards,
Kamil Tomaszewski

[Bhalaji Kharthik]

@KamilTomaszewski I followed the steps to create a project from the below link.

https://developer.sony.com/develop/spresense/docs/sdk_set_up_ide_en.html#_creating_an_application_project

[KamilTomaszewski]

@Bhalaji-Kharthik Ah, you are using the IDE. Then you need to change STACKSIZE in myproject/myapps/Makefile. Are you also trying to use std image library?

[Bhalaji Kharthik]

@KamilTomaszewski Yes, i tried changing the stack size already in makefile but it doesn't seem to work. I am using stb image library. Are there any other reasons for getting stack dump errors?

[KamilTomaszewski]

@Bhalaji-Kharthik You can get a stack dump after Hard Fault or Assert.

I have just tried the stb library on the IDE and it works for me.

I added this line to the Makefile: STACKSIZE = 8192

My code looks like this:

#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>

#define STB_IMAGE_IMPLEMENTATION
#include "stb_image/stb_image.h"
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image/stb_image_write.h"

int main(int argc, char *argv[])
{
  int width, height, channels;
  unsigned char *img = stbi_load("/mnt/sd0/test.jpg", &width, &height, &channels, 0);
  if(img == NULL) {
    printf("Error in loading the image\n");
    exit(1);
  }
  printf("Loaded image with a width of %dpx, a height of %dpx and %d channels\n", width, height, channels);

  stbi_write_jpg("/mnt/sd0/test2.jpg", width, height, channels, img, 100);

  stbi_image_free(img);

  return 0;
}

What is the size of the picture you are trying to read or write?