input/read-controls/source/main.c

/*
    Circle Pad example made by Aurelio Mannara for libctru
    Please refer to https://github.com/devkitPro/libctru/blob/master/libctru/include/3ds/services/hid.h for more information
    This code was modified for the last time on: 12/13/2014 2:20 UTC+1
 
    This wouldn't be possible without the amazing work done by:
    -Smealum
    -fincs
    -WinterMute
    -yellows8
    -plutoo
    -mtheall
    -Many others who worked on 3DS and I'm surely forgetting about
*/
 
#include <3ds.h>
#include <stdio.h>
 
int main(int argc, char **argv)
{
    //Matrix containing the name of each key. Useful for printing when a key is pressed
    char keysNames[32][32] = {
        "KEY_A", "KEY_B", "KEY_SELECT", "KEY_START",
        "KEY_DRIGHT", "KEY_DLEFT", "KEY_DUP", "KEY_DDOWN",
        "KEY_R", "KEY_L", "KEY_X", "KEY_Y",
        "", "", "KEY_ZL", "KEY_ZR",
        "", "", "", "",
        "KEY_TOUCH", "", "", "",
        "KEY_CSTICK_RIGHT", "KEY_CSTICK_LEFT", "KEY_CSTICK_UP", "KEY_CSTICK_DOWN",
        "KEY_CPAD_RIGHT", "KEY_CPAD_LEFT", "KEY_CPAD_UP", "KEY_CPAD_DOWN"
    };
 
    // Initialize services
    gfxInitDefault();
 
    //Initialize console on top screen. Using NULL as the second argument tells the console library to use the internal console structure as current one
    consoleInit(GFX_TOP, NULL);
 
    u32 kDownOld = 0, kHeldOld = 0, kUpOld = 0; //In these variables there will be information about keys detected in the previous frame
 
    printf("\x1b[1;1HPress Start to exit.");
    printf("\x1b[2;1HCirclePad position:");
 
    // Main loop
    while (aptMainLoop())
    {
        //Scan all the inputs. This should be done once for each frame
        hidScanInput();
 
        //hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
        u32 kDown = hidKeysDown();
        //hidKeysHeld returns information about which buttons have are held down in this frame
        u32 kHeld = hidKeysHeld();
        //hidKeysUp returns information about which buttons have been just released
        u32 kUp = hidKeysUp();
 
        if (kDown & KEY_START) break; // break in order to return to hbmenu
 
        //Do the keys printing only if keys have changed
        if (kDown != kDownOld || kHeld != kHeldOld || kUp != kUpOld)
        {
            //Clear console
            consoleClear();
 
            //These two lines must be rewritten because we cleared the whole console
            printf("\x1b[1;1HPress Start to exit.");
            printf("\x1b[2;1HCirclePad position:");
 
            printf("\x1b[4;1H"); //Move the cursor to the fourth row because on the third one we'll write the circle pad position
 
            //Check if some of the keys are down, held or up
            int i;
            for (i = 0; i < 32; i++)
            {
                if (kDown & BIT(i)) printf("%s down\n", keysNames[i]);
                if (kHeld & BIT(i)) printf("%s held\n", keysNames[i]);
                if (kUp & BIT(i)) printf("%s up\n", keysNames[i]);
            }
        }
 
        //Set keys old values for the next frame
        kDownOld = kDown;
        kHeldOld = kHeld;
        kUpOld = kUp;
 
        circlePosition pos;
 
        //Read the CirclePad position
        hidCircleRead(&pos);
 
        //Print the CirclePad position
        printf("\x1b[3;1H%04d; %04d", pos.dx, pos.dy);
 
        // Flush and swap framebuffers
        gfxFlushBuffers();
        gfxSwapBuffers();
 
        //Wait for VBlank
        gspWaitForVBlank();
    }
 
    // Exit services
    gfxExit();
    return 0;
}