Question

我正在使用arduino pro micro在游戏杆上制作游戏手柄。

从控制台输入上下命令，raspberry pi的gpio将输出它们，而arduino将接收它们并将它们输入到游戏机中。

我使用ArduinoJoystickLibrary。 https://github.com/MHeironimus/ArduinoJoystickLibrary

我想玩GBA游戏，但Dpad保持输入状态。我怎么只按一次向上键？

此外，在下面的gif中，一次只按一次向上和向下键，但是在中间按向右键或其他键则没有反应。

作为附录，我使用了一个称为Retro freak的游戏机。 retro freak

代码使用以下内容

arduino_pro_micro_gamepad.ino

#include <Joystick.h>

#define OFFSET_BUTTON 2
#define OFFSET_DPAD 18

Joystick_ Joystick(JOYSTICK_DEFAULT_REPORT_ID,JOYSTICK_TYPE_GAMEPAD,
  4, 0,                  // Button Count, Hat Switch Count
  true, true, false,     // X and Y, but no Z Axis
  false, false, false,   // No Rx, Ry, or Rz
  false, false,          // No rudder or throttle
  false, false, false);  // No accelerator, brake, or steering

void setup() {
  // Initialize Button Pins
  pinMode(2, INPUT_PULLUP);  // Button 1
  pinMode(3, INPUT_PULLUP);  // Button 2
  pinMode(4, INPUT_PULLUP);  // Button 3
  pinMode(5, INPUT_PULLUP);  // Button 3
  
  pinMode(18, INPUT_PULLUP); // D-pad Up
  pinMode(19, INPUT_PULLUP); // D-pad Right
  pinMode(20, INPUT_PULLUP); // D-pad Down
  pinMode(21, INPUT_PULLUP); // D-pad Left

  Joystick.begin();
  Joystick.setXAxisRange(-1, 1);
  Joystick.setYAxisRange(-1, 1);
  Joystick.setYAxis(0);
  Joystick.setYAxis(0);
}

// Last state of the buttons
int lastDpadState[4] = {0,0,0,0};  // Up, Right, Down, Left
int lastButtonState[4] = {0,0,0,0};  // Button 1 - 4

void updateDpad() {
  for (int i = 0; i <= 3; i++) {
    int currentDpadState = digitalRead(i + OFFSET_DPAD);
    if (currentDpadState != lastDpadState[i]) {
      switch (i) {
        case 0: // UP
          if (currentDpadState == 1) {
            Joystick.setYAxis(-1);
          }
          break;
        case 1: // RIGHT
          if (currentDpadState == 1) {
            Joystick.setXAxis(1);
          }
          break;
        case 2: // DOWN
          if (currentDpadState == 1) {
            Joystick.setYAxis(1);
          }
          break;
        case 3: // LEFT
          if (currentDpadState == 1) {
            Joystick.setXAxis(-1);
          }
          break;
        }
      lastDpadState[i] = currentDpadState;
    }
  }
}

void updateButton() {
  for (int i = 0; i <= 3; i++) {
    int currentButtonState = !digitalRead(i + OFFSET_BUTTON);
    if (currentButtonState != lastButtonState[i]) {
      Joystick.setButton(i, currentButtonState);
      lastButtonState[i] = currentButtonState;
    }
  }
}

void loop() {
  updateDpad();
  updateButton();
  delay(5);
}

raspi_game_input.py

import RPi.GPIO as GPIO
from time import sleep

GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.OUT, initial=GPIO.HIGH)
GPIO.setup(27, GPIO.OUT, initial=GPIO.HIGH)
GPIO.setup(23, GPIO.OUT, initial=GPIO.HIGH)
GPIO.setup(24, GPIO.OUT, initial=GPIO.HIGH)

GPIO.setup(16, GPIO.OUT, initial=GPIO.HIGH)
GPIO.setup(20, GPIO.OUT, initial=GPIO.HIGH)
GPIO.setup(21, GPIO.OUT, initial=GPIO.HIGH)
GPIO.setup(26, GPIO.OUT, initial=GPIO.HIGH)


def on(gpio_number):
  GPIO.output(gpio_number, GPIO.LOW)
  sleep(0.05)
  GPIO.output(gpio_number, GPIO.HIGH)

def key_select(input_key):
  if input_key == 'a':
    on(17)
  elif input_key == 'b':
    on(27)
  elif input_key == 'home':
    on(23)
  elif input_key == 'game':
    on(24)
  elif input_key == 'u':
    on(16)
  elif input_key == 'd':
    on(20)
  elif input_key == 'r':
    on(21)
  elif input_key == 'l':
    on(26)
  else:
    pass


if __name__ == '__main__':
  try:
    while True:
      print('push button')
      key = input()
      print(f'input is ${key}')
      key_select(key)

  except KeyboardInterrupt:
    GPIO.cleanup()

Answer 1

只需稍微修改一下setup（）;

  Joystick.setYAxis(0);
  Joystick.setYAxis(0);

更改为：

  Joystick.setXAxis(0);
  Joystick.setYAxis(0);

尝试在操作之前或之后重置为初始值。

if (currentDpadState != lastDpadState[i]) {
   reset();
   switch (i) {
    ...
   }
}


void reset(){
Joystick.setXAxis(0);
Joystick.setYAxis(0);
}

Answer 2

我的问题是使用操纵杆而不是hatSwitch。

我想要的实现是只输入一次箭头键，所以我使用了帽子开关。

#include <Joystick.h>

#define OFFSET_BUTTON 2
#define OFFSET_DPAD 18

Joystick_ Joystick(JOYSTICK_DEFAULT_REPORT_ID, 
  JOYSTICK_TYPE_GAMEPAD,
  9,1,
  false, false, false, false, false, false,
  false, false, false, false, false);

void setup() {
  pinMode(2, INPUT_PULLUP);  // Button 1
  pinMode(3, INPUT_PULLUP);  // Button 2
  pinMode(4, INPUT_PULLUP);  // Button 3
  pinMode(5, INPUT_PULLUP);  // Button 4
  pinMode(6, INPUT_PULLUP);  // Button 5
  pinMode(7, INPUT_PULLUP);  // Button 6
  pinMode(8, INPUT_PULLUP);  // Button 7
  pinMode(9, INPUT_PULLUP);  // Button 8
  pinMode(10, INPUT_PULLUP);  // Button 9

  pinMode(18, INPUT_PULLUP); // D-pad Up
  pinMode(19, INPUT_PULLUP); // D-pad Right
  pinMode(20, INPUT_PULLUP); // D-pad Down
  pinMode(21, INPUT_PULLUP); // D-pad Left
  
  Joystick.begin();
}

// Last state of the pins
int lastDpadState[2][4] = {{0,0,0,0}, {0,0,0,0}};
int lastButtonState[10] = {0,0,0,0,0,0,0,0,0,0};  // Button 1 - 10


void updateDpad(){
  bool valueChanged[2] = {false, false};
  int currentPin = 18;

  // Read pin values
  for (int hatSwitch = 0; hatSwitch < 2; hatSwitch++){
    for (int index = 0; index < 4; index++){
      int currentDpadState = !digitalRead(currentPin++);
      if (currentDpadState != lastDpadState[hatSwitch][index]){
        valueChanged[hatSwitch] = true;
        lastDpadState[hatSwitch][index] = currentDpadState;
      }
    }
  }

  for (int hatSwitch = 0; hatSwitch < 2; hatSwitch++)
  {
    if (valueChanged[hatSwitch]) {
      if ((lastDpadState[hatSwitch][0] == 0)
        && (lastDpadState[hatSwitch][1] == 0)
        && (lastDpadState[hatSwitch][2] == 0)
        && (lastDpadState[hatSwitch][3] == 0)) {
          Joystick.setHatSwitch(hatSwitch, -1);
      }
      if (lastDpadState[hatSwitch][0] == 1) {
        Joystick.setHatSwitch(hatSwitch, 0); // up
      }
      if (lastDpadState[hatSwitch][1] == 1) {
        Joystick.setHatSwitch(hatSwitch, 90); // right
      }
      if (lastDpadState[hatSwitch][2] == 1) {
        Joystick.setHatSwitch(hatSwitch, 180); // down
      }
      if (lastDpadState[hatSwitch][3] == 1) {
        Joystick.setHatSwitch(hatSwitch, 270);
      }
    } // if the value changed
  } // for each hat switch
}

void updateButton() {
  for (int i = 0; i <= 9; i++) {
    int currentButtonState = !digitalRead(i + OFFSET_BUTTON);
    if (currentButtonState != lastButtonState[i]) {
      Joystick.setButton(i, currentButtonState);
      lastButtonState[i] = currentButtonState;
    }
  }
}

void loop() {
  updateDpad();
  updateButton();
  delay(50);
}

arduino游戏杆库，请勿停止游戏杆

2 个答案: