Imported more changes from 3ds-examples.

Author: yellows8

audio/playtone/source/main.c

@@ -64,7 +64,10 @@ int main(int argc, char **argv)
         //Scan all the inputs. This should be done once for each frame
         hidScanInput();
 
-        if (hidKeysDown(CONTROLLER_P1_AUTO) & KEY_PLUS) break; // break in order to return to hbmenu
+        //hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
+        u32 kDown = hidKeysDown(CONTROLLER_P1_AUTO);
+
+        if (kDown & KEY_PLUS) break; // break in order to return to hbmenu
 
         if (hidKeysDown(CONTROLLER_P1_AUTO) & KEY_A)
         {

graphics/printing/hello-world/source/main.c

@@ -20,7 +20,10 @@ int main(int argc, char **argv)
 		//Scan all the inputs. This should be done once for each frame
 		hidScanInput();
 
-		if (hidKeysDown(CONTROLLER_P1_AUTO) & KEY_PLUS) break; // break in order to return to hbmenu
+		//hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
+		u32 kDown = hidKeysDown(CONTROLLER_P1_AUTO);
+
+		if (kDown & KEY_PLUS) break; // break in order to return to hbmenu
 
 		gfxFlushBuffers();
 		gfxSwapBuffers();

graphics/simplegfx/source/main.c

@@ -29,7 +29,10 @@ int main(int argc, char **argv)
         //Scan all the inputs. This should be done once for each frame
         hidScanInput();
 
-        if (hidKeysDown(CONTROLLER_P1_AUTO) & KEY_PLUS) break; // break in order to return to hbmenu
+        //hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
+        u32 kDown = hidKeysDown(CONTROLLER_P1_AUTO);
+
+        if (kDown & KEY_PLUS) break; // break in order to return to hbmenu
 
         u32 width, height;
         u32 pos;

hid/irsensor/source/main.c

@@ -35,7 +35,10 @@ int main(int argc, char **argv)
 		//Scan all the inputs. This should be done once for each frame
 		hidScanInput();
 
-		if (hidKeysDown(CONTROLLER_P1_AUTO) & KEY_PLUS) break; // break in order to return to hbmenu
+		//hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
+		u32 kDown = hidKeysDown(CONTROLLER_P1_AUTO);
+
+		if (kDown & KEY_PLUS) break; // break in order to return to hbmenu
 
 		gfxFlushBuffers();
 		gfxSwapBuffers();