Getting started with SDK

[aswinsreekumar]

Hello,
I installed and have setup the SDK and VScode successfully. Even the trial "hello world" serial port program is working fine. But I'm unable to proceed further. I read the SDK developer guide multiple times but I don't know exactly where to start. The example programs were a bit complicated to me. Could you give some starting point to understand how the SDK programming works, something like a blink program to start with and how building and flashing the programs work, so that I could built further concepts on top of it.

I'm bit acquainted to Embedded C programming on AVR microcontrollers. So some tutorial parallel to that would be really beneficial to understand easier.

Thank you

[KamilTomaszewski]

Hi @aswinsreekumar

You can start by checking some examples: https://developer.sony.com/develop/spresense/docs/sdk_tutorials_en.html. Each example includes instructions on how to build and flash Spresense.

The source code for these examples is here: https://github.com/sonydevworld/spresense/tree/master/examples

Example code to turn on all four LEDs:

#include <sdk/config.h>
#include <stdio.h>

#include <arch/board/board.h>
#include <arch/chip/pin.h>

#define LED0 PIN_I2S1_BCK
#define LED1 PIN_I2S1_LRCK
#define LED2 PIN_I2S1_DATA_IN
#define LED3 PIN_I2S1_DATA_OUT

int myapps_main(int argc, char *argv[])
{
  board_gpio_write(LED0, -1);
  board_gpio_config(LED0, 0, 0, true, PIN_FLOAT);
  board_gpio_write(LED1, -1);
  board_gpio_config(LED1, 0, 0, true, PIN_FLOAT);
  board_gpio_write(LED2, -1);
  board_gpio_config(LED2, 0, 0, true, PIN_FLOAT);
  board_gpio_write(LED3, -1);
  board_gpio_config(LED3, 0, 0, true, PIN_FLOAT);

  board_gpio_write(LED0, 1);
  board_gpio_write(LED1, 1);
  board_gpio_write(LED2, 1);
  board_gpio_write(LED3, 1);

  return 0;
}

You can follow the instructions from here: https://developer.sony.com/develop/spresense/docs/sdk_set_up_ide_en.html#_edit_the_main_source_code

Hope this helps you.

Best Regards,
Kamil Tomaszewski

[aswinsreekumar]

@kamiltomaszewski Thank you sir !