TTGO_TWatch_Library/examples/NES/controller.cpp

#include <Arduino.h>
#include "config.h"
/* controller is GPIO */
#if defined(HW_CONTROLLER_GPIO)

extern "C" void controller_init()
{
#if defined(HW_CONTROLLER_GPIO_ANALOG_JOYSTICK)
    pinMode(HW_CONTROLLER_GPIO_UP_DOWN, INPUT);
    pinMode(HW_CONTROLLER_GPIO_LEFT_RIGHT, INPUT);
#else  /* !defined(HW_CONTROLLER_GPIO_ANALOG_JOYSTICK) */
    pinMode(HW_CONTROLLER_GPIO_UP, INPUT_PULLUP);
    pinMode(HW_CONTROLLER_GPIO_DOWN, INPUT_PULLUP);
    pinMode(HW_CONTROLLER_GPIO_LEFT, INPUT_PULLUP);
    pinMode(HW_CONTROLLER_GPIO_RIGHT, INPUT_PULLUP);
#endif /* !defined(HW_CONTROLLER_GPIO_ANALOG_JOYSTICK) */
    pinMode(HW_CONTROLLER_GPIO_SELECT, INPUT_PULLUP);
    pinMode(HW_CONTROLLER_GPIO_START, INPUT_PULLUP);
    pinMode(HW_CONTROLLER_GPIO_A, INPUT_PULLUP);
    pinMode(HW_CONTROLLER_GPIO_B, INPUT_PULLUP);
    pinMode(HW_CONTROLLER_GPIO_X, INPUT_PULLUP);
    pinMode(HW_CONTROLLER_GPIO_Y, INPUT_PULLUP);
}

extern "C" uint32_t controller_read_input()
{
    uint32_t u, d, l, r, s, t, a, b, x, y;

#if defined(HW_CONTROLLER_GPIO_ANALOG_JOYSTICK)

#if defined(HW_CONTROLLER_GPIO_REVERSE_UP)
    int joyY = 4095 - analogRead(HW_CONTROLLER_GPIO_UP_DOWN);
#else /* !defined(HW_CONTROLLER_GPIO_REVERSE_UD) */
    int joyY = analogRead(HW_CONTROLLER_GPIO_UP_DOWN);
#endif /* !defined(HW_CONTROLLER_GPIO_REVERSE_UD) */

#if defined(HW_CONTROLLER_GPIO_REVERSE_LF)
    int joyX = 4095 - analogRead(HW_CONTROLLER_GPIO_LEFT_RIGHT);
#else /* !defined(HW_CONTROLLER_GPIO_REVERSE_LF) */
    int joyX = analogRead(HW_CONTROLLER_GPIO_LEFT_RIGHT);
#endif /* !defined(HW_CONTROLLER_GPIO_REVERSE_LF) */

    if (joyY > 2048 + 1024) {
        u = 1;
        d = 0;
    } else if (joyY < 1024) {
        u = 0;
        d = 1;
    } else {
        u = 1;
        d = 1;
    }

    if (joyX > 2048 + 1024) {
        l = 1;
        r = 0;
    } else if (joyX < 1024) {
        l = 0;
        r = 1;
    } else {
        l = 1;
        r = 1;
    }

#else  /* !defined(HW_CONTROLLER_GPIO_ANALOG_JOYSTICK) */
    u = digitalRead(HW_CONTROLLER_GPIO_UP);
    d = digitalRead(HW_CONTROLLER_GPIO_DOWN);
    l = digitalRead(HW_CONTROLLER_GPIO_LEFT);
    r = digitalRead(HW_CONTROLLER_GPIO_RIGHT);
#endif /* !defined(HW_CONTROLLER_GPIO_ANALOG_JOYSTICK) */

    s = digitalRead(HW_CONTROLLER_GPIO_SELECT);
    t = digitalRead(HW_CONTROLLER_GPIO_START);
    a = digitalRead(HW_CONTROLLER_GPIO_A);
    b = digitalRead(HW_CONTROLLER_GPIO_B);
    x = digitalRead(HW_CONTROLLER_GPIO_X);
    y = digitalRead(HW_CONTROLLER_GPIO_Y);
    return 0xFFFFFFFF ^ ((!u << 0) | (!d << 1) | (!l << 2) | (!r << 3) | (!s << 4) | (!t << 5) | (!a << 6) | (!b << 7) | (!x << 8) | (!y << 9));
}

/* controller is I2C BBQ10Keyboard */
#elif defined(HW_CONTROLLER_I2C_BBQ10KB)

#include <Wire.h>
#include <BBQ10Keyboard.h>
BBQ10Keyboard keyboard;
static uint32_t value = 0xFFFFFFFF;

extern "C" void controller_init()
{
    Wire.begin();
    keyboard.begin();
    keyboard.setBacklight(0.2f);
}

extern "C" uint32_t controller_read_input()
{

    int keyCount = keyboard.keyCount();
    while (keyCount--) {
        const BBQ10Keyboard::KeyEvent key = keyboard.keyEvent();
        String state = "pressed";
        if (key.state == BBQ10Keyboard::StateLongPress)
            state = "held down";
        else if (key.state == BBQ10Keyboard::StateRelease)
            state = "released";

        // Serial.printf("key: '%c' (dec %d, hex %02x) %s\r\n", key.key, key.key, key.key, state.c_str());

        uint32_t bit = 0;
        if (key.key != 0) {
            switch (key.key) {
            case 'w': // up
                bit = (1 << 0);
                break;
            case 'z': // down
                bit = (1 << 1);
                break;
            case 'a': // left
                bit = (1 << 2);
                break;
            case 'd': // right
                bit = (1 << 3);
                break;
            case ' ': // select
                bit = (1 << 4);
                break;
            case 10: // enter -> start
                bit = (1 << 5);
                break;
            case 'k': // A
                bit = (1 << 6);
                break;
            case 'l': // B
                bit = (1 << 7);
                break;
            case 'o': // X
                bit = (1 << 8);
                break;
            case 'p': // Y
                bit = (1 << 9);
                break;
            }
            if (key.state == BBQ10Keyboard::StatePress) {
                value ^= bit;
            } else if (key.state == BBQ10Keyboard::StateRelease) {
                value |= bit;
            }
        }
    }

    return value;
}
#elif defined(HW_CONTROLLER_DABBLE_APP)

#include <DabbleESP32.h>

extern "C" void controller_init()
{
    Dabble.begin("Watch-NES");
}

extern "C" uint32_t controller_read_input()
{
    uint32_t u, d, l, r, s, t, a, b, x, y;

    Dabble.processInput();

    d = GamePad.isUpPressed();
    u = GamePad.isDownPressed();
    r = GamePad.isLeftPressed();
    l = GamePad.isRightPressed();

    s = !GamePad.isSelectPressed();
    t = !GamePad.isStartPressed();
    y = !GamePad.isTrianglePressed();
    b = !GamePad.isCrossPressed();
    x = !GamePad.isSquarePressed();
    a = !GamePad.isCirclePressed();

    return 0xFFFFFFFF ^ ((!u << 0) | (!d << 1) | (!l << 2) | (!r << 3) | (!s << 4) | (!t << 5) | (!a << 6) | (!b << 7) | (!x << 8) | (!y << 9));
}

#else /* no controller defined */

extern "C" void controller_init()
{
    Serial.printf("GPIO controller disabled in menuconfig; no input enabled.\n");
}

extern "C" uint32_t controller_read_input()
{
    return 0xFFFFFFFF;
}

#endif /* no controller defined */