mirror of
https://github.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter
synced 2024-11-11 19:55:08 -05:00
220 lines
6.7 KiB
C++
220 lines
6.7 KiB
C++
#include "HID.h"
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#if ARDUINO < 10606
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#error The Joystick2 library requires Arduino IDE 1.6.6 or greater. Please update your IDE.
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#endif
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#if !defined(USBCON)
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#error The Joystick2 library can only be used with a USB MCU (e.g. Arduino Leonardo, Arduino Micro, etc.).
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#endif
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#if !defined(_USING_HID)
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#error "legacy HID core (non pluggable)"
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#endif
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#define JOYSTICK_REPORT_ID 0x03
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#define JOYSTICK2_REPORT_ID 0x04
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#define JOYSTICK3_REPORT_ID 0x05
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#define JOYSTICK4_REPORT_ID 0x06
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#define JOYSTICK_DATA_SIZE 2
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#define JOYSTICK_STATE_SIZE 3
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#include <PS2Keyboard.h>
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const int DataPin = 3;
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const int IRQpin = 2;
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PS2Keyboard keyboard;
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//#define DEBUG
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//================================================================================
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//================================================================================
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// Joystick (Gamepad)
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#define HIDDESC_MACRO(REPORT_ID) \
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/* Joystick # */ \
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0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ \
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0x09, 0x04, /* USAGE (Joystick) */ \
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0xa1, 0x01, /* COLLECTION (Application) */ \
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0x85, REPORT_ID, /* REPORT_ID */ \
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/* 16 Buttons */ \
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0x05, 0x09, /* USAGE_PAGE (Button) */ \
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0x19, 0x01, /* USAGE_MINIMUM (Button 1) */ \
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0x29, 0x08, /* USAGE_MAXIMUM (Button 8) */ \
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0x15, 0x00, /* LOGICAL_MINIMUM (0) */ \
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0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ \
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0x75, 0x01, /* REPORT_SIZE (1) */ \
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0x95, 0x08, /* REPORT_COUNT (8) */ \
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0x55, 0x00, /* UNIT_EXPONENT (0) */ \
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0x65, 0x00, /* UNIT (None) */ \
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0x81, 0x02, /* INPUT (Data,Var,Abs) */ \
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/* X and Y Axis */ \
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0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ \
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0x09, 0x01, /* USAGE (Pointer) */ \
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0xA1, 0x00, /* COLLECTION (Physical) */ \
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0x09, 0x30, /* USAGE (x) */ \
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0x09, 0x31, /* USAGE (y) */ \
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0x15, 0x00, /* LOGICAL_MINIMUM (0) */ \
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0x26, 0xff, 0x00, /* LOGICAL_MAXIMUM (255) */ \
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0x75, 0x08, /* REPORT_SIZE (8) */ \
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0x95, 0x02, /* REPORT_COUNT (2) */ \
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0x81, 0x02, /* INPUT (Data,Var,Abs) */ \
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0xc0, /* END_COLLECTION */ \
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0xc0 /* END_COLLECTION */
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static const uint8_t hidReportDescriptor[] PROGMEM = {
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HIDDESC_MACRO(JOYSTICK_REPORT_ID),
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HIDDESC_MACRO(JOYSTICK2_REPORT_ID),
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HIDDESC_MACRO(JOYSTICK3_REPORT_ID),
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HIDDESC_MACRO(JOYSTICK4_REPORT_ID)
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};
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class Joystick_ {
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private:
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uint8_t joystickId;
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uint8_t reportId;
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uint8_t olddata[JOYSTICK_DATA_SIZE];
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uint8_t state[JOYSTICK_STATE_SIZE];
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uint8_t flag;
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public:
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uint8_t type;
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uint8_t data[JOYSTICK_DATA_SIZE];
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Joystick_(uint8_t initJoystickId, uint8_t initReportId) {
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// Setup HID report structure
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static bool usbSetup = false;
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if (!usbSetup) {
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static HIDSubDescriptor node(hidReportDescriptor, sizeof(hidReportDescriptor));
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HID().AppendDescriptor(&node);
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usbSetup = true;
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}
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// Initalize State
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joystickId = initJoystickId;
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reportId = initReportId;
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data[0] = 0;
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data[1] = 0;
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memcpy(olddata, data, JOYSTICK_DATA_SIZE);
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state[0] = 0;
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state[1] = 127;
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state[2] = 127;
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sendState(1);
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}
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void updateState() {
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state[0] = data[0];
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state[1] = 127;
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state[2] = 127;
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if (bitRead(data[1], 0)) state[2] = 0; /* up */
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if (bitRead(data[1], 1)) state[2] = 255; /* down */
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if (bitRead(data[1], 2)) state[1] = 0; /* left */
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if (bitRead(data[1], 3)) state[1] = 255; /* right */
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/*if (memcmp(olddata, data, JOYSTICK_DATA_SIZE)) {
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memcpy(olddata, data, JOYSTICK_DATA_SIZE);
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flag = 1;
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}*/
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}
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void sendState(uint8_t force = 0) {
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if (flag || force) {
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// HID().SendReport(Report number, array of values in same order as HID descriptor, length)
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HID().SendReport(reportId, state, JOYSTICK_STATE_SIZE);
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flag = 0;
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}
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}
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};
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Joystick_ Joystick[4] =
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{
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Joystick_(0, JOYSTICK_REPORT_ID),
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Joystick_(1, JOYSTICK2_REPORT_ID),
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Joystick_(2, JOYSTICK3_REPORT_ID),
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Joystick_(3, JOYSTICK4_REPORT_ID)
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};
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//================================================================================
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//================================================================================
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void setup() {
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delay(1000);
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keyboard.begin(DataPin, IRQpin);
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#ifdef DEBUG
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Serial.begin(9600);
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Serial.println("Start");
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#endif
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}
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//http://www.computer-engineering.org/ps2keyboard/scancodes2.html
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void set(uint32_t code, uint8_t j, uint8_t d, uint8_t b) {
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uint8_t is_break = 0;
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if ( (code >> 8 & 0xff) == 0xF0 ) is_break = 1;
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//Serial.print(" break: "); Serial.print(is_break);
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if (is_break) bitClear(Joystick[j].data[d], b);
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if (!is_break) bitSet(Joystick[j].data[d], b);
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Joystick[j].updateState();
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Joystick[j].sendState(1);
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}
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void loop() {
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if (keyboard.available()) {
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// read whole code at once
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int32_t code = keyboard.read();
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uint8_t c = code;
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uint8_t e = 0;
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if ( (code & 0xff) == 0xE0 || (code >> 8 & 0xff) == 0xE0 || (code >> 16 & 0xff) == 0xE0 || (code >> 24 & 0xff) == 0xE0 ) e = 1;
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#ifdef DEBUG
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Serial.print("e:");Serial.print(e);Serial.print(" ");
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Serial.println(code, HEX);
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#endif
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//set function parameters: code, joystick (0-3), data (0 or 1), bit (0-7)
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// if e is 1, it means codes with E0 prefix
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if (e == 1 && c == 0x75) set(code, 0, 1, 0); // up
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if (e == 1 && c == 0x72) set(code, 0, 1, 1); // down
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if (e == 1 && c == 0x6B) set(code, 0, 1, 2); // left
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if (e == 1 && c == 0x74) set(code, 0, 1, 3); // right
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if (e == 1 && c == 0x14) set(code, 0, 0, 0); // r-ctrl = a
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if (e == 1 && c == 0x11) set(code, 0, 0, 1); // alt gr = b
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if (e == 0 && c == 0x5A) set(code, 0, 0, 2); // enter = start
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if (e == 0 && c == 0x59) set(code, 0, 0, 3); // r-shift = select
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//if (e == x && c == 0xXX) set(code, 0, 0, 4); // = x
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//if (e == x && c == 0xXX) set(code, 0, 0, 5); // = y
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//if (e == x && c == 0xXX) set(code, 0, 0, 6); // = left shoulder
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//if (e == x && c == 0xXX) set(code, 0, 0, 7); // = right shoulder
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if (e == 0 && c == 0x1D) set(code, 1, 1, 0); // w = up
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if (e == 0 && c == 0x1B) set(code, 1, 1, 1); // s = down
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if (e == 0 && c == 0x1C) set(code, 1, 1, 2); // a = left
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if (e == 0 && c == 0x23) set(code, 1, 1, 3); // d = right
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if (e == 0 && c == 0x14) set(code, 1, 0, 0); // l-ctrl = a
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if (e == 0 && c == 0x11) set(code, 1, 0, 1); // l-alt = b
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if (e == 0 && c == 0x0D) set(code, 1, 0, 2); // tab = start
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if (e == 0 && c == 0x12) set(code, 1, 0, 3); // l-shift = select
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}
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}
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