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;
}