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Arduino-USB-HID-RetroJoystickAdapter
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Arduino-USB-HID-RetroJoysti.../Keyboard_PS2/RetroJoystickAdapter_PS2-ke...

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#include "HID.h"
#if ARDUINO < 10606
#error The Joystick2 library requires Arduino IDE 1.6.6 or greater. Please update your IDE.
#endif
#if !defined(USBCON)
#error The Joystick2 library can only be used with a USB MCU (e.g. Arduino Leonardo, Arduino Micro, etc.).
#endif
#if !defined(_USING_HID)
#error "legacy HID core (non pluggable)"
#endif
#define JOYSTICK_REPORT_ID 0x03
#define JOYSTICK2_REPORT_ID 0x04
#define JOYSTICK3_REPORT_ID 0x05
#define JOYSTICK4_REPORT_ID 0x06
#define JOYSTICK_DATA_SIZE 2
#define JOYSTICK_STATE_SIZE 3
#include <PS2Keyboard.h>
const int DataPin = 3; // PS/2 pin 1
const int IRQpin = 2; // PS/2 pin 5
PS2Keyboard keyboard;
//#define DEBUG
//================================================================================
//================================================================================
// Joystick (Gamepad)
#define HIDDESC_MACRO(REPORT_ID) \
/* Joystick # */ \
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ \
0x09, 0x04, /* USAGE (Joystick) */ \
0xa1, 0x01, /* COLLECTION (Application) */ \
0x85, REPORT_ID, /* REPORT_ID */ \
/* 8 Buttons */ \
0x05, 0x09, /* USAGE_PAGE (Button) */ \
0x19, 0x01, /* USAGE_MINIMUM (Button 1) */ \
0x29, 0x08, /* USAGE_MAXIMUM (Button 8) */ \
0x15, 0x00, /* LOGICAL_MINIMUM (0) */ \
0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ \
0x75, 0x01, /* REPORT_SIZE (1) */ \
0x95, 0x08, /* REPORT_COUNT (8) */ \
0x55, 0x00, /* UNIT_EXPONENT (0) */ \
0x65, 0x00, /* UNIT (None) */ \
0x81, 0x02, /* INPUT (Data,Var,Abs) */ \
/* X and Y Axis */ \
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ \
0x09, 0x01, /* USAGE (Pointer) */ \
0xA1, 0x00, /* COLLECTION (Physical) */ \
0x09, 0x30, /* USAGE (x) */ \
0x09, 0x31, /* USAGE (y) */ \
0x15, 0x00, /* LOGICAL_MINIMUM (0) */ \
0x26, 0xff, 0x00, /* LOGICAL_MAXIMUM (255) */ \
0x75, 0x08, /* REPORT_SIZE (8) */ \
0x95, 0x02, /* REPORT_COUNT (2) */ \
0x81, 0x02, /* INPUT (Data,Var,Abs) */ \
0xc0, /* END_COLLECTION */ \
0xc0 /* END_COLLECTION */
static const uint8_t hidReportDescriptor[] PROGMEM = {
HIDDESC_MACRO(JOYSTICK_REPORT_ID),
HIDDESC_MACRO(JOYSTICK2_REPORT_ID),
HIDDESC_MACRO(JOYSTICK3_REPORT_ID),
HIDDESC_MACRO(JOYSTICK4_REPORT_ID)
};
class Joystick_ {
private:
uint8_t joystickId;
uint8_t reportId;
uint8_t state[JOYSTICK_STATE_SIZE];
uint8_t flag;
public:
uint8_t type;
uint8_t data[JOYSTICK_DATA_SIZE];
Joystick_(uint8_t initJoystickId, uint8_t initReportId) {
// Setup HID report structure
static bool usbSetup = false;
if (!usbSetup) {
static HIDSubDescriptor node(hidReportDescriptor, sizeof(hidReportDescriptor));
HID().AppendDescriptor(&node);
usbSetup = true;
}
// Initalize State
joystickId = initJoystickId;
reportId = initReportId;
data[0] = 0;
data[1] = 0;
updateState();
sendState(1);
}
void updateState() {
state[0] = data[0];
state[1] = 127;
state[2] = 127;
if (bitRead(data[1], 0)) state[2] = 0; /* up */
if (bitRead(data[1], 1)) state[2] = 255; /* down */
if (bitRead(data[1], 2)) state[1] = 0; /* left */
if (bitRead(data[1], 3)) state[1] = 255; /* right */
}
void sendState(uint8_t force = 0) {
if (flag || force) {
// HID().SendReport(Report number, array of values in same order as HID descriptor, length)
HID().SendReport(reportId, state, JOYSTICK_STATE_SIZE);
flag = 0;
}
}
};
Joystick_ Joystick[4] =
{
Joystick_(0, JOYSTICK_REPORT_ID),
Joystick_(1, JOYSTICK2_REPORT_ID),
Joystick_(2, JOYSTICK3_REPORT_ID),
Joystick_(3, JOYSTICK4_REPORT_ID)
};
//================================================================================
//================================================================================
void setup() {
delay(1000);
keyboard.begin(DataPin, IRQpin);
#ifdef DEBUG
Serial.begin(9600);
Serial.println("Start");
#endif
}
void set(uint32_t code, uint8_t j, uint8_t d, uint8_t b) {
uint8_t is_break = 0;
if ( (code >> 8 & 0xff) == 0xF0 ) is_break = 1;
if (is_break) bitClear(Joystick[j].data[d], b);
if (!is_break) bitSet(Joystick[j].data[d], b);
Joystick[j].updateState();
Joystick[j].sendState(1);
}
void loop() {
if (keyboard.available()) {
// read whole code at once
int32_t code = keyboard.read();
uint8_t c = code & 0xff;
uint8_t e;
//if ( (code & 0xff) == 0xE0 || (code >> 8 & 0xff) == 0xE0 || (code >> 16 & 0xff) == 0xE0 || (code >> 24 & 0xff) == 0xE0 ) e = 1;
if ( (code >> 8 & 0xff) == 0xE0 || (code >> 16 & 0xff) == 0xE0 ) e = 1; else e = 0;
//if (code^0xE000 || code^0xE00000) e = 1;
#ifdef DEBUG
Serial.print("e:");Serial.print(e);Serial.print(" ");
Serial.println(code, HEX);
#endif
//http://www.computer-engineering.org/ps2keyboard/scancodes2.html
//set-function parameters: code, joystick (0-3), data (0 or 1), bit (0-7)
// if e is 1, it means codes with E0 prefix
//Joystick 0
if (e == 1 && c == 0x75) set(code, 0, 1, 0); // up
if (e == 1 && c == 0x72) set(code, 0, 1, 1); // down
if (e == 1 && c == 0x6B) set(code, 0, 1, 2); // left
if (e == 1 && c == 0x74) set(code, 0, 1, 3); // right
if (e == 1 && c == 0x14) set(code, 0, 0, 0); // R-ctrl = a
if (e == 1 && c == 0x11) set(code, 0, 0, 1); // alt gr = b
if (e == 0 && c == 0x5A) set(code, 0, 0, 2); // enter = start
if (e == 0 && c == 0x59) set(code, 0, 0, 3); // R-shift = select
//if (e == x && c == 0xXX) set(code, 0, 0, 4); // = x
//if (e == x && c == 0xXX) set(code, 0, 0, 5); // = y
//if (e == x && c == 0xXX) set(code, 0, 0, 6); // = left shoulder
//if (e == x && c == 0xXX) set(code, 0, 0, 7); // = right shoulder
//Joystick 1
if (e == 0 && c == 0x1D) set(code, 1, 1, 0); // w = up
if (e == 0 && c == 0x1B) set(code, 1, 1, 1); // s = down
if (e == 0 && c == 0x1C) set(code, 1, 1, 2); // a = left
if (e == 0 && c == 0x23) set(code, 1, 1, 3); // d = right
if (e == 0 && c == 0x14) set(code, 1, 0, 0); // L-ctrl = a
if (e == 0 && c == 0x11) set(code, 1, 0, 1); // L-alt = b
if (e == 0 && c == 0x0D) set(code, 1, 0, 2); // tab = start
if (e == 0 && c == 0x12) set(code, 1, 0, 3); // L-shift = select
//if (e == x && c == 0xXX) set(code, 1, 0, 4); // = x
//if (e == x && c == 0xXX) set(code, 1, 0, 5); // = y
//if (e == x && c == 0xXX) set(code, 1, 0, 6); // = left shoulder
//if (e == x && c == 0xXX) set(code, 1, 0, 7); // = right shoulder
//Joystick 2
if (e == 0 && c == 0x43) set(code, 2, 1, 0); // i = up
if (e == 0 && c == 0x42) set(code, 2, 1, 1); // k = down
if (e == 0 && c == 0x3B) set(code, 2, 1, 2); // j = left
if (e == 0 && c == 0x4B) set(code, 2, 1, 3); // l = right
if (e == 0 && c == 0x3A) set(code, 2, 0, 0); // m = a
if (e == 0 && c == 0x31) set(code, 2, 0, 1); // n = b
if (e == 0 && c == 0x44) set(code, 2, 0, 2); // o = start
if (e == 0 && c == 0x3C) set(code, 2, 0, 3); // u = select
//if (e == x && c == 0xXX) set(code, 2, 0, 4); // = x
//if (e == x && c == 0xXX) set(code, 2, 0, 5); // = y
//if (e == x && c == 0xXX) set(code, 2, 0, 6); // = left shoulder
//if (e == x && c == 0xXX) set(code, 2, 0, 7); // = right shoulder
//Joystick 3
if (e == 0 && c == 0x75) set(code, 3, 1, 0); // keypad 8
if (e == 0 && c == 0x73) set(code, 3, 1, 1); // keypad 5
if (e == 0 && c == 0x6B) set(code, 3, 1, 2); // keypad 4
if (e == 0 && c == 0x74) set(code, 3, 1, 3); // keypad 6
if (e == 0 && c == 0x70) set(code, 3, 0, 0); // keypad 0 = a
if (e == 0 && c == 0x71) set(code, 3, 0, 1); // keypad , = b
if (e == 1 && c == 0x5A) set(code, 3, 0, 2); // keypad enter = start
if (e == 0 && c == 0x79) set(code, 3, 0, 3); // keypad + = select
//if (e == x && c == 0xXX) set(code, 3, 0, 4); // = x
//if (e == x && c == 0xXX) set(code, 3, 0, 5); // = y
//if (e == x && c == 0xXX) set(code, 3, 0, 6); // = left shoulder
//if (e == x && c == 0xXX) set(code, 3, 0, 7); // = right shoulder
}
}