I am making a custom handheld game console using a Raspberry Pi 3 and RetroPie. I bought a Teensy LC and have 8 buttons connected (A, B, X, Y + 4 Dpad directions) and 2 PSP analog sticks. I am going to have a total of 16 buttons (What I have so far + L1, L2, R1, R2, Start, Select, Volume Up, Volume Down). Anyways, this is my first time ever using a Teensy, and I managed to get all the buttons to work so far.
Here's my code (Sorry, it's a bit long):
Code: Select all
// Program made by Jordon Milne
// December 19 2016
#include <Bounce.h>
// Creates Bounce objects which deals with button chatter
Bounce button_Dpad_Up = Bounce(0, 10);
Bounce button_Dpad_Down = Bounce(1, 10);
Bounce button_Dpad_Left = Bounce(2, 10);
Bounce button_Dpad_Right = Bounce(3, 10);
Bounce button_A = Bounce(4, 10);
Bounce button_B = Bounce(5, 10);
Bounce button_X = Bounce(6, 10);
Bounce button_Y = Bounce(7, 10);
Bounce button_Start = Bounce(8, 10);
Bounce button_Select = Bounce(9, 10);
Bounce button_Vol_Up = Bounce(10, 10);
Bounce button_Vol_Down = Bounce(11, 10);
Bounce button_L1 = Bounce(20, 10);
Bounce button_L2 = Bounce(21, 10);
Bounce button_R1 = Bounce(22, 10);
Bounce button_R2 = Bounce(23, 10);
int yAxis_Left = A0;
int xAxis_Left = A1;
int yAxis_Right = A2;
int xAxis_Right = A3;
void setup() {
// Defines the pins on the Teensy to correspond with controller buttons.
// Buttons use INPUT_PULLUP to activate the pullup resistor built into
// the Teensy. Analog input only uses INPUT, no pullup resistor is needed.
pinMode(0, INPUT_PULLUP); // Dpad Up
pinMode(1, INPUT_PULLUP); // Dpad Down
pinMode(2, INPUT_PULLUP); // Dpad Left
pinMode(3, INPUT_PULLUP); // Dpad Right
pinMode(4, INPUT_PULLUP); // Button A
pinMode(5, INPUT_PULLUP); // Button B
pinMode(6, INPUT_PULLUP); // Button X
pinMode(7, INPUT_PULLUP); // Button Y
pinMode(8, INPUT_PULLUP); // Button Start
pinMode(9, INPUT_PULLUP); // Button Select
pinMode(10, INPUT_PULLUP); // Button Vol Up
pinMode(11, INPUT_PULLUP); // Button Vol Down
pinMode(20, INPUT_PULLUP); // Button L1
pinMode(21, INPUT_PULLUP); // Button L2
pinMode(22, INPUT_PULLUP); // Button R1
pinMode(23, INPUT_PULLUP); // Button R2
pinMode(yAxis_Left, INPUT); // yAxis for left analog stick
pinMode(xAxis_Left, INPUT); // xAxis for left analog stick
pinMode(yAxis_Right, INPUT); // yAxis for right analog stick
pinMode(xAxis_Right, INPUT); // xAxis for right analog stick
// Set all axes to defaults
Joystick.X(512);
Joystick.Y(512);
Joystick.Z(512);
Joystick.Zrotate(512);
Joystick.sliderLeft(512);
Joystick.sliderRight(512);
Joystick.hat(-1);
}
void loop() {
// This updates all the buttons at a very fast rate
button_Dpad_Up.update();
button_Dpad_Down.update();
button_Dpad_Left.update();
button_Dpad_Right.update();
button_A.update();
button_B.update();
button_X.update();
button_Y.update();
button_Start.update();
button_Select.update();
button_Vol_Up.update();
button_Vol_Down.update();
button_L1.update();
button_L2.update();
button_R1.update();
button_R2.update();
// Checks if button is pressed, and simulates a keyboard press.
if(button_Dpad_Up.fallingEdge())
{
//Keyboard.press(KEY_W);
Joystick.button(1, 1);
}
if(button_Dpad_Down.fallingEdge())
{
//Keyboard.press(KEY_S);
Joystick.button(2, 1);
}
if(button_Dpad_Left.fallingEdge())
{
//Keyboard.press(KEY_A);
Joystick.button(3, 1);
}
if(button_Dpad_Right.fallingEdge())
{
//Keyboard.press(KEY_D);
Joystick.button(4, 1);
}
if(button_A.fallingEdge())
{
//Keyboard.press(KEY_Z);
Joystick.button(5, 1);
}
if(button_B.fallingEdge())
{
//Keyboard.press(KEY_X);
Joystick.button(6, 1);
}
if(button_X.fallingEdge())
{
//Keyboard.press(KEY_C);
Joystick.button(7, 1);
}
if(button_Y.fallingEdge())
{
//Keyboard.press(KEY_V);
Joystick.button(8, 1);
}
if(button_Start.fallingEdge())
{
//Keyboard.press(KEY_ENTER);
Joystick.button(9, 1);
}
if(button_Select.fallingEdge())
{
//Keyboard.press(KEY_TAB);
Joystick.button(10, 1);
}
if(button_Vol_Up.fallingEdge())
{
//Keyboard.press(KEY_9);
Joystick.button(11, 1);
}
if(button_Vol_Down.fallingEdge())
{
//Keyboard.press(KEY_0);
Joystick.button(12, 1);
}
if(button_L1.fallingEdge())
{
//Keyboard.press(KEY_K);
Joystick.button(13, 1);
}
if(button_L2.fallingEdge())
{
//Keyboard.press(KEY_L);
Joystick.button(14, 1);
}
if(button_R1.fallingEdge())
{
//Keyboard.press(KEY_N);
Joystick.button(15, 1);
}
if(button_R2.fallingEdge())
{
//Keyboard.press(KEY_M);
Joystick.button(16, 1);
}
// Check if button is released.
if(button_Dpad_Up.risingEdge())
{
//Keyboard.release(KEY_W);
Joystick.button(1, 0);
}
if(button_Dpad_Down.risingEdge())
{
//Keyboard.release(KEY_S);
Joystick.button(2, 0);
}
if(button_Dpad_Left.risingEdge())
{
//Keyboard.release(KEY_A);
Joystick.button(3, 0);
}
if(button_Dpad_Right.risingEdge())
{
//Keyboard.release(KEY_D);
Joystick.button(4, 0);
}
if(button_A.risingEdge())
{
//Keyboard.release(KEY_Z);
Joystick.button(5, 0);
}
if(button_B.risingEdge())
{
//Keyboard.release(KEY_X);
Joystick.button(6, 0);
}
if(button_X.risingEdge())
{
//Keyboard.release(KEY_C);
Joystick.button(7, 0);
}
if(button_Y.risingEdge())
{
//Keyboard.release(KEY_V);
Joystick.button(8, 0);
}
if(button_Start.risingEdge())
{
//Keyboard.release(KEY_ENTER);
Joystick.button(9, 0);
}
if(button_Select.risingEdge())
{
//Keyboard.release(KEY_TAB);
Joystick.button(10, 0);
}
if(button_Vol_Up.risingEdge())
{
//Keyboard.release(KEY_9);
Joystick.button(11, 0);
}
if(button_Vol_Down.risingEdge())
{
//Keyboard.release(KEY_0);
Joystick.button(12, 0);
}
if(button_L1.risingEdge())
{
//Keyboard.release(KEY_K);
Joystick.button(13, 0);
}
if(button_L2.risingEdge())
{
//Keyboard.release(KEY_L);
Joystick.button(14, 0);
}
if(button_R1.risingEdge())
{
//Keyboard.release(KEY_N);
Joystick.button(15, 0);
}
if(button_R2.risingEdge())
{
//Keyboard.release(KEY_M);
Joystick.button(16, 0);
}
// Left analog stick
Joystick.X(analogRead(xAxis_Left));
Joystick.Y(analogRead(yAxis_Left));
// Right analog stick
Joystick.Z(analogRead(xAxis_Right));
Joystick.Zrotate(analogRead(yAxis_Right));
}However, when I plug the Teensy into my Raspberry Pi via USB, the analog sticks don't work as intended. On the left analog stick, UP moves up but RIGHT moves down and LEFT and DOWN on the stick do nothing. On the right analog stick, UP moves left and RIGHT moves right but LEFT and DOWN again do nothing. I really hope that makes sense. Basically, down and left do nothing on either stick, and to move on screen you have to use up and right on both sticks for the 4 directions. Also I tried to configure a new controller and it can read up and left as input for the left analog stick, and up, left, and right on the right analog stick but that's it.
I don't understand why it works fine on my computer but it's so wonky on RetroPie and I am going crazy trying to figure this out. I feel like I'm missing something but I don't know what and I really want to get it working. Please if anyone can help I would very much appreciate it!
Thanks