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Arduino-USB-HID-RetroJoystickAdapter
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// 5V (red)
// GND (black)
#define DATA1 2 // (brown)
#define CMD1 3 // (orange)
#define ATT1 4 // (yellow)
#define CLK1 5 // (blue)
/*#define DATA2 6
#define CMD2 7
#define ATT2 8
#define CLK2 9 */
#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_STATE_SIZE 6
//#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 */ \
/* 16 Buttons */ \
0x05, 0x09, /* USAGE_PAGE (Button) */ \
0x19, 0x01, /* USAGE_MINIMUM (Button 1) */ \
0x29, 0x10, /* USAGE_MAXIMUM (Button 16) */ \
0x15, 0x00, /* LOGICAL_MINIMUM (0) */ \
0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ \
0x75, 0x01, /* REPORT_SIZE (1) */ \
0x95, 0x10, /* REPORT_COUNT (16) */ \
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, 0x32, /* USAGE (Z) */ \
0x09, 0x35, /* USAGE (Rz) */ \
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, 0x04, /* REPORT_COUNT (4) */ \
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 olddata[JOYSTICK_STATE_SIZE];
uint8_t flag;
public:
uint8_t type;
uint8_t data[JOYSTICK_STATE_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;
data[2] = 127;
data[3] = 127;
data[4] = 127;
data[5] = 127;
memcpy(olddata, data, JOYSTICK_STATE_SIZE);
sendState(1);
}
void updateState() {
if (type != 0x73 && type != 0x53) {
data[2] = 127;
data[3] = 127;
data[4] = 127;
data[5] = 127;
}
if (type == 0x41 || type == 0x73 || type == 0x53) {
if (memcmp(olddata, data, JOYSTICK_STATE_SIZE)) {
memcpy(olddata, data, JOYSTICK_STATE_SIZE);
flag = 1;
}
}
//sendState();
}
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, data, 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)
};
//================================================================================
//================================================================================
uint8_t shift(uint8_t _dataOut) // Does the actual shifting, both in and out simultaneously
{
uint8_t _temp = 0;
uint8_t _dataIn = 0;
uint8_t _delay = 6; //2 unstable; //clock 250kHz
delayMicroseconds(100); //max acknowledge waiting time 100us
for (uint8_t _i = 0; _i <= 7; _i++) {
if ( _dataOut & (1 << _i) ) // write bit
digitalWrite(CMD1, HIGH);
else
digitalWrite(CMD1, LOW);
digitalWrite(CLK1, LOW); // read bit
delayMicroseconds(_delay);
_temp = digitalRead(DATA1);
if (_temp) {
_dataIn = _dataIn | (B00000001 << _i);
}
digitalWrite(CLK1, HIGH);
delayMicroseconds(_delay);
}
return _dataIn;
}
void setup() {
pinMode(DATA1, INPUT_PULLUP);
pinMode(CMD1, OUTPUT);
pinMode(ATT1, OUTPUT);
pinMode(CLK1, OUTPUT);
/*pinMode(DATA2, INPUT_PULLUP);
pinMode(CMD2, OUTPUT);
pinMode(ATT2, OUTPUT);
pinMode(CLK2, OUTPUT);*/
#ifdef DEBUG
Serial.begin(115200);
#endif
}
void loop() {
// http://problemkaputt.de/psx-spx.htm#controllerandmemorycardsignals
uint8_t head, padding, multitap;
#ifdef DEBUG
uint8_t data[100];
#endif
// first: read gamepad normally
digitalWrite(ATT1, LOW);
//digitalWrite(ATT2, LOW);
head = shift(0x01);
Joystick[0].type = shift(0x42);
padding = shift(0x01); //read multitap in next command
Joystick[0].data[0] = ~shift(0x00); //buttons
Joystick[0].data[1] = ~shift(0x00); //buttons
Joystick[0].data[2] = shift(0x00); //right analog
Joystick[0].data[3] = shift(0x00); //right analog
Joystick[0].data[4] = shift(0x00); //left analog
Joystick[0].data[5] = shift(0x00); //left analog
digitalWrite(ATT1, HIGH);
//digitalWrite(ATT2, HIGH);
//delay(100);
// second: check and read multitap
digitalWrite(ATT1, LOW);
head = shift(0x01);
multitap = shift(0x42);
padding = shift(0x00); //next time normal read
if (multitap == 0x80) {
for (uint8_t i = 0; i < 4; i++) {
Joystick[i].type = shift(0x00);
padding = shift(0x00);
Joystick[i].data[0] = ~shift(0x00); //buttons
Joystick[i].data[1] = ~shift(0x00); //buttons
Joystick[i].data[2] = shift(0x00); //right analog
Joystick[i].data[3] = shift(0x00); //right analog
Joystick[i].data[4] = shift(0x00); //left analog
Joystick[i].data[5] = shift(0x00); //left analog
}
}
digitalWrite(ATT1, HIGH);
#ifdef DEBUG
for (uint8_t i = 0; i < 4; i++) {
Serial.print(" multitap: "); Serial.println(multitap, HEX);
Serial.print(" type: 0x"); Serial.print(Joystick[i].type, HEX);
Serial.print(" data: 0x"); Serial.print(Joystick[i].data[0], HEX);
Serial.print(" 0x"); Serial.print(Joystick[i].data[1], HEX);
Serial.print(" 0x"); Serial.print(Joystick[i].data[2], HEX);
Serial.print(" 0x"); Serial.print(Joystick[i].data[3], HEX);
Serial.print(" 0x"); Serial.print(Joystick[i].data[4], HEX);
Serial.print(" 0x"); Serial.print(Joystick[i].data[5], HEX);
Serial.println();
}
/*Serial.print(" type: 0x"); Serial.print(Joystick[0].type, HEX);
Serial.print(" data: 0x"); Serial.print(Joystick[0].data[0], HEX);
Serial.print(" 0x"); Serial.print(Joystick[0].data[1], HEX);
Serial.print(" 0x"); Serial.print(Joystick[0].data[2], HEX);
Serial.print(" 0x"); Serial.print(Joystick[0].data[3], HEX);
Serial.print(" 0x"); Serial.print(Joystick[0].data[4], HEX);
Serial.print(" 0x"); Serial.print(Joystick[0].data[5], HEX);
Serial.println();*/
Serial.flush();
#endif
Joystick[0].updateState();
Joystick[1].updateState();
Joystick[2].updateState();
Joystick[3].updateState();
Joystick[0].sendState();
Joystick[1].sendState();
Joystick[2].sendState();
Joystick[3].sendState();
delayMicroseconds(1000);
}