mirror of
https://github.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter
synced 2024-11-24 10:02:18 -05:00
128 lines
3.3 KiB
C++
128 lines
3.3 KiB
C++
/*
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Description: Interfacing a 2-port NES controller with a PC with an Arduino.
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Coded by: Prodigity
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Date: 1 December 2011
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Revision: V0.93 (beta)
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Modified by: Matt Booth (20 December 2014)
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Adapted for USB (ATmega32U4, 5V) by Kurg 3.9.2016
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*/
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#include "Joystick2.h"
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#define EVENTS_TOTAL 4+2+2 //4 directions, 2 fire-buttons and Start + Select
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uint8_t lastStatusPort1[EVENTS_TOTAL];
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uint8_t newStatusPort1[EVENTS_TOTAL];
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uint8_t lastStatusPort2[EVENTS_TOTAL];
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uint8_t newStatusPort2[EVENTS_TOTAL];
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#define CLOCK1 7
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#define LATCH1 8
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#define DATA1 9
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#define CLOCK2 2
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#define LATCH2 3
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#define DATA2 4
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// http://www.mit.edu/~tarvizo/nes-controller.html
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void setup() {
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//clear statusarrays (1=OFF, 0=ON)
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for (uint8_t i = 0; i < EVENTS_TOTAL; i++) {
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lastStatusPort1[i] = 1;
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newStatusPort1[i] = 1;
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lastStatusPort2[i] = 1;
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newStatusPort2[i] = 1;
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}
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pinMode(LATCH1, OUTPUT);
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pinMode(CLOCK1, OUTPUT);
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pinMode(DATA1, INPUT);
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pinMode(LATCH2, OUTPUT);
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pinMode(CLOCK2, OUTPUT);
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pinMode(DATA2, INPUT);
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Joystick[0].begin(false);
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Joystick[1].begin(false);
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}
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uint8_t flag1 = 0;
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uint8_t flag2 = 0;
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void loop() {
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ReadNESjoy();
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//check for changes - do not raise a flag if nothing changes
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for (uint8_t i=0; i < EVENTS_TOTAL; i++) {
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if (newStatusPort1[i] != lastStatusPort1[i]) {
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lastStatusPort1[i] = newStatusPort1[i];
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flag1 = 1;
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}
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if (newStatusPort2[i] != lastStatusPort2[i]) {
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lastStatusPort2[i] = newStatusPort2[i];
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flag2 = 1;
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}
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}
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if (flag1) {
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Joystick[0].setYAxis(0);
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Joystick[0].setXAxis(0);
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if (!newStatusPort1[4]) Joystick[0].setYAxis(-127); //UP
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if (!newStatusPort1[5]) Joystick[0].setYAxis(127); //DOWN
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if (!newStatusPort1[6]) Joystick[0].setXAxis(-127); //LEFT
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if (!newStatusPort1[7]) Joystick[0].setXAxis(127); //RIGHT
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Joystick[0].setButton(0, !newStatusPort1[0]); //BUTTON1 (A)
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Joystick[0].setButton(1, !newStatusPort1[1]); //BUTTON2 (B)
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Joystick[0].setButton(2, !newStatusPort1[2]); //BUTTON3 (Select)
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Joystick[0].setButton(3, !newStatusPort1[3]); //BUTTON4 (Start)
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}
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if (flag2) {
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Joystick[1].setYAxis(0);
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Joystick[1].setXAxis(0);
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if (!newStatusPort2[4]) Joystick[1].setYAxis(-127); //UP
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if (!newStatusPort2[5]) Joystick[1].setYAxis(127); //DOWN
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if (!newStatusPort2[6]) Joystick[1].setXAxis(-127); //LEFT
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if (!newStatusPort2[7]) Joystick[1].setXAxis(127); //RIGHT
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Joystick[1].setButton(0, !newStatusPort2[0]); //BUTTON1 (A)
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Joystick[1].setButton(1, !newStatusPort2[1]); //BUTTON2 (B)
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Joystick[1].setButton(2, !newStatusPort2[2]); //BUTTON3 (Select)
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Joystick[1].setButton(3, !newStatusPort2[3]); //BUTTON4 (Start)
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}
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if (flag1) Joystick[0].sendState();
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if (flag2) Joystick[1].sendState();
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flag1 = 0;
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flag2 = 0;
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}
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#define latchlow digitalWrite(LATCH1, LOW); digitalWrite(LATCH2, LOW);
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#define latchhigh digitalWrite(LATCH1, HIGH); digitalWrite(LATCH2, HIGH)
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#define clocklow digitalWrite(CLOCK1, LOW); digitalWrite(CLOCK2, LOW)
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#define clockhigh digitalWrite(CLOCK1, HIGH); digitalWrite(CLOCK2, HIGH)
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#define wait delayMicroseconds(12)
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void ReadNESjoy() {
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latchlow;
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clocklow;
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latchhigh;
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wait;
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latchlow;
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for (int i = 0; i < 8; i++) {
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newStatusPort1[i] = digitalRead(DATA1);
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newStatusPort2[i] = digitalRead(DATA2);
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clockhigh;
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wait;
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clocklow;
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wait;
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}
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}
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