Good morning,

SDL2 recognizes my PS4 controller but not the button presses. Here is a minimal code example.

#include <SDL2/SDL.h>
#include <stdio.h>

int main(int argc, char** argv) {
  if (SDL_Init(SDL_INIT_VIDEO) != 0 ) {
    printf("Unable to initialize SDL (%s)\n",SDL_GetError());
    printf("Exit\n");
    return -1;
  }

  SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER);

  SDL_GameController *gameController = NULL;
  int numJoysticks;
  numJoysticks = SDL_NumJoysticks();
  printf("%d joysticks found\n", numJoysticks);

  if( numJoysticks <= 0 ) {
    return -1;
  }

  if( ! SDL_IsGameController(0) ) {
    printf("Error: joystick 0 is not a game controller\n");
    printf("Exit\n");
    SDL_Quit();
    return -1;
  }
  
  gameController = SDL_GameControllerOpen(0);

  if( ! gameController ) {
    printf("No game controller found\n");
    printf("Exit\n");
    SDL_Quit();
  }
  
  printf("Opened Game Controller 0\n");
  printf("Found a valid controller, named: %s\n", SDL_GameControllerName(gameController));

  if( SDL_GameControllerGetButton(gameController, SDL_CONTROLLER_BUTTON_A) ) {
    printf("Button press!\n"); // Never printed
  }

  // Exit
  SDL_GameControllerClose(gameController);
  SDL_Quit();
  return 0;
}

Here is the output I get.

1 joysticks found
Opened Game Controller 0
Found a valid controller, named: PS4 Controller

Thank you for your time and your help.

SDL2 recognizes my PS4 controller but not the button presses. Here is a minimal code example.

#include <SDL2/SDL.h>
#include <stdio.h>

int main(int argc, char** argv) {
  if (SDL_Init(SDL_INIT_VIDEO) != 0 ) {
    printf("Unable to initialize SDL (%s)\n",SDL_GetError());
    printf("Exit\n");
    return -1;
  }

  SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER);

  SDL_GameController *gameController = NULL;
  int numJoysticks;
  numJoysticks = SDL_NumJoysticks();
  printf("%d joysticks found\n", numJoysticks);

  if( numJoysticks <= 0 ) {
    return -1;
  }

  if( ! SDL_IsGameController(0) ) {
    printf("Error: joystick 0 is not a game controller\n");
    printf("Exit\n");
    SDL_Quit();
    return -1;
  }
  
  gameController = SDL_GameControllerOpen(0);

  if( ! gameController ) {
    printf("No game controller found\n");
    printf("Exit\n");
    SDL_Quit();
  }
  
  printf("Opened Game Controller 0\n");
  printf("Found a valid controller, named: %s\n", SDL_GameControllerName(gameController));

  if( SDL_GameControllerGetButton(gameController, SDL_CONTROLLER_BUTTON_A) ) {
    printf("Button press!\n"); // Never printed
  }

  // Exit
  SDL_GameControllerClose(gameController);
  SDL_Quit();
  return 0;
}

Here is the output I get:

1 joysticks found
Opened Game Controller 0
Found a valid controller, named: PS4 Controller

What am I doing wrong?