Stap 2: De code
De volgende stap is de code die is gekoppeld aan dit bericht te downloaden.
In het zip-bestand vindt u makey_makey.ino en settings.h. Als u de Ino bestand met de Arduino IDE opent, de .h bestand automatisch geopend in een tabblad.
U hoeft alleen om dingen te veranderen in settings.h want dit is waar alle sleutels worden gedefinieerd.
#include "Arduino.h" /* ///////////////////////////////////////////////////////////////////////// // KEY MAPPINGS: WHICH KEY MAPS TO WHICH PIN ON THE MAKEY MAKEY BOARD? // ///////////////////////////////////////////////////////////////////////// - edit the keyCodes array below to change the keys sent by the MaKey MaKey for each input - the comments tell you which input sends that key (for example, by default 'w' is sent by pin D5) - change the keys by replacing them. for example, you can replace 'w' with any other individual letter, number, or symbol on your keyboard - you can also use codes for other keys such as modifier and function keys (see the the list of additional key codes at the bottom of this file) */ int keyCodes[NUM_INPUTS] = { // top side of the makey makey board KEY_UP_ARROW, // up arrow pad KEY_DOWN_ARROW, // down arrow pad KEY_LEFT_ARROW, // left arrow pad KEY_RIGHT_ARROW, // right arrow pad ' ', // space button pad MOUSE_LEFT, // click button pad // female header on the back left side 'w', // pin D5 'a', // pin D4 's', // pin D3 'd', // pin D2 'f', // pin D1 'g', // pin D0 // female header on the back right side MOUSE_MOVE_UP, // pin A5 MOUSE_MOVE_DOWN, // pin A4 MOUSE_MOVE_LEFT, // pin A3 MOUSE_MOVE_RIGHT, // pin A2 MOUSE_LEFT, // pin A1 MOUSE_RIGHT // pin A0 }; /////////////////////////// // NOISE CANCELLATION ///// /////////////////////////// #define SWITCH_THRESHOLD_OFFSET_PERC 5 // number between 1 and 49 // larger value protects better against noise oscillations, but makes it harder to press and release // recommended values are between 2 and 20 // default value is 5 #define SWITCH_THRESHOLD_CENTER_BIAS 55 // number between 1 and 99 // larger value makes it easier to "release" keys, but harder to "press" // smaller value makes it easier to "press" keys, but harder to "release" // recommended values are between 30 and 70 // 50 is "middle" 2.5 volt center // default value is 55 // 100 = 5V (never use this high) // 0 = 0 V (never use this low ///////////////////////// // MOUSE MOTION ///////// ///////////////////////// #define MOUSE_MOTION_UPDATE_INTERVAL 35 // how many loops to wait between // sending mouse motion updates #define PIXELS_PER_MOUSE_STEP 4 // a larger number will make the mouse // move faster #define MOUSE_RAMP_SCALE 150 // Scaling factor for mouse movement ramping // Lower = more sensitive mouse movement // Higher = slower ramping of speed // 0 = Ramping off #define MOUSE_MAX_PIXELS 10 // Max pixels per step for mouse movement /* /////////////////////////// // ADDITIONAL KEY CODES /// /////////////////////////// - you can use these codes in the keyCodes array above - to get modifier keys, function keys, etc KEY_LEFT_CTRL KEY_LEFT_SHIFT KEY_LEFT_ALT KEY_LEFT_GUI KEY_RIGHT_CTRL KEY_RIGHT_SHIFT KEY_RIGHT_ALT KEY_RIGHT_GUI KEY_BACKSPACE KEY_TAB KEY_RETURN KEY_ESC KEY_INSERT KEY_DELETE KEY_PAGE_UP KEY_PAGE_DOWN KEY_HOME KEY_END KEY_CAPS_LOCK KEY_F1 KEY_F2 KEY_F3 KEY_F4 KEY_F5 KEY_F6 KEY_F7 KEY_F8 KEY_F9 KEY_F10 KEY_F11 KEY_F12 */ De eerste variabele in deze code is toetscodes [NUM_INPUTS]. Deze variabele is een matrix die 18 waarden bevat. Elke waarde staat voor een toets of muis input en heeft haar eigen index. Dus KEY_UP_ARROW index 0 is, is KEY_DOWN_ARROW index 1, enzovoort. Deze index nummers overeenkomen met de MaKey MaKey ingangen op het bord.
Aan de onderkant van de code kunt u een lijst van extra toetscodes. Deze codes kunt u de belangrijke koppeling van de MaKey MaKey wijzigt.
Stel dat u wilt wijzigen de SPATIEBALK naar een ENTER-toets. Dit is de index 4 zoals u op de afbeelding zien kunt. Zoek voor index 4 in de code en verander ' ' te KEY_RETURN.
