Cheaper than Teensy

[Oxodao]

Yep i'm working on that, I can handle this. Just tell me on which port you link the buttons

if your code is not good, it sends releases or other commands constantlycode

Yeah but that not that bad

[Fleder]

Yeah but that not that bad

Well, i had a micro that went into USB HID mode, sent inputs and i was not able to reprogramm it.
I had to flash the ram again with a AVR programer to get it working again.

But thanks for your work here!

[Oxodao]

Just use a safe mode which prevents the arduino from typing with a switch

[Fleder]

Just use a safe mode which prevents the arduino from typing with a switch

That is the problem, i have no idea how to code this properly.
I know this trick, to conect a pin to gnd to disable USB HID mode, but the rest is a closed book to me.
And this can be a problem, if you are going to use all of the inputs for buttons.

[Oxodao]

I'm gonna do the code dont worry guys

[Helder]

I'm actually working on a project using an atmega2560 with 2 other people that is way more advanced in complicity and code, and I can ask them for a little help on the code end to see if they can come up with something.

[Oxodao]

Okay so here is the working code (At least for the D-pad, I did not try the other buttons since my wire unsoldered itself and I dont have any soldering iron where I am now...):

Code: Select all

#include <Gamepad.h>
Gamepad gb;

// I'm wondering why this takes all of the ports, why it starts at 2 and skip the 11, 12 & 13...
#define BTN_UP 2
#define BTN_LEFT 3
#define BTN_DOWN 4
#define BTN_RIGHT 5
#define BTN_B 6
#define BTN_A 7
#define BTN_X 8
#define BTN_Y 9
#define BTN_SELECT 10
#define BTN_START 14
#define BTN_BCKLEFT 15
#define BTN_BACKRIGHT 16

void setup() {
  for (int x = 2; x<16; x++){
    if (x != 11 && x != 12 && x!= 13)
      pinMode(x, INPUT_PULLUP);
  }
}

void loop() {

  bool downSet  = digitalRead(BTN_DOWN);
  bool upSet    = digitalRead(BTN_UP); // No pun intended
  bool leftSet  = digitalRead(BTN_LEFT);
  bool rightSet = digitalRead(BTN_RIGHT);
  
  gb.setLeftXaxis(!leftSet ? -127 : !rightSet ? 127 : 0);
  gb.setLeftYaxis(!downSet ? -127 : !upSet ? 127 : 0);

  gb.setButtonState(1, digitalRead(BTN_A));
  gb.setButtonState(2, digitalRead(BTN_B));
  gb.setButtonState(3, digitalRead(BTN_X));
  gb.setButtonState(4, digitalRead(BTN_Y));
  gb.setButtonState(5, digitalRead(BTN_SELECT));
  gb.setButtonState(6, digitalRead(BTN_START));
  gb.setButtonState(7, digitalRead(BTN_BCKLEFT));
  gb.setButtonState(8, digitalRead(BTN_BCKRIGHT));

  gb.sendUpdate();
}

Here is the library: https://github.com/GAMELASTER/ArduinoGamepad
Just edit the Gamepad.cpp file and remove every call to "sendUpdate" in the setButtonState and Set...Axis functions, so that it update everything only once and not 12 times a run...

The code is licenced under WTFPL V2

[Fleder]

So, you are going the joystick kind of route then?

Would you also consider the keyboard solution? Since some RetroPie versions do not come with Joystick support, only for keyboard inputs.

[Oxodao]

Oh I did not know this.. I'll try to fix my first script so that the user can chose the way he go though I'm not sûre I'll be able to do this in Linux... I'll try as soon as I get my board fixed

EDIT: Here is the code, Still untested. I'll try it as soon as possible. No external libraries, and at least it compiles :p
EDIT2: OOOPS very bad idea. Not working, can't reprogram..

[Oxodao]

Okai, so 1.1v of the Gamepad script, fully working as far as I tried:

Code: Select all

#include <Gamepad.h>
Gamepad gb;

// I'm wondering why this takes all of the ports, why it starts at 2 and skip the 11, 12 & 13...
#define BTN_UP 2
#define BTN_LEFT 3
#define BTN_DOWN 4
#define BTN_RIGHT 5
#define BTN_B 6
#define BTN_A 7
#define BTN_X 8
#define BTN_Y 9
#define BTN_SELECT 10
#define BTN_START 14
#define BTN_BCKLEFT 15
#define BTN_BCKRIGHT 16

void setup() {
  for (int x = 2; x<16; x++){
    if (x != 11 && x != 12 && x!= 13)
      pinMode(x, INPUT_PULLUP);
  }
}

void loop() {

  bool downSet  = digitalRead(BTN_DOWN);
  bool upSet    = digitalRead(BTN_UP); // No pun intended
  bool leftSet  = digitalRead(BTN_LEFT);
  bool rightSet = digitalRead(BTN_RIGHT);
  
  gb.setLeftXaxis(!leftSet ? -127 : !rightSet ? 127 : 0);
  gb.setLeftYaxis(!downSet ? 127 : !upSet ? -127 : 0);

  gb.setButtonState(1, !digitalRead(BTN_A));
  gb.setButtonState(2, !digitalRead(BTN_B));
  gb.setButtonState(3, !digitalRead(BTN_X));
  gb.setButtonState(4, !digitalRead(BTN_Y));
  gb.setButtonState(5, !digitalRead(BTN_SELECT));
  gb.setButtonState(6, !digitalRead(BTN_START));
  gb.setButtonState(7, !digitalRead(BTN_BCKLEFT));
  gb.setButtonState(8, !digitalRead(BTN_BCKRIGHT));

  gb.sendUpdate();
}

For the keyboard it won't be that easy so I'll spend more time on sunday