mirror of
https://github.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter
synced 2024-11-24 10:02:18 -05:00
122 lines
3.5 KiB
C++
122 lines
3.5 KiB
C++
#include <hidboot.h>
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#include <usbhub.h>
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#define POTSENSE 4 //ICP1 (Arduino Pro Micro: pin4, Arduino Uno: pin8)
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#define POTX 9 // POT AX 9, also OC1A
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#define POTY 10 // POT AY 5, also OC1B
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#define LBTN 5 // BTN 6, Joystick FIRE switch
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#define RBTN 6 // UP 1, Joystick UP switch
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int16_t dx = 0;
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int16_t dy = 0;
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uint8_t buttons = 0;
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uint8_t update = 1;
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class MouseRptParser : public MouseReportParser {
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protected:
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void OnMouseMove(MOUSEINFO *mi);
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void OnLeftButtonUp(MOUSEINFO *mi);
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void OnLeftButtonDown(MOUSEINFO *mi);
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void OnRightButtonUp(MOUSEINFO *mi);
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void OnRightButtonDown(MOUSEINFO *mi);
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void OnMiddleButtonUp(MOUSEINFO *mi);
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void OnMiddleButtonDown(MOUSEINFO *mi);
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};
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void MouseRptParser::OnMouseMove(MOUSEINFO *mi) {
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dx=mi->dX;
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dy=mi->dY;
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update = 1;
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};
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void MouseRptParser::OnLeftButtonUp(MOUSEINFO *mi) {
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buttons &= ~1;
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update = 1;
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};
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void MouseRptParser::OnLeftButtonDown(MOUSEINFO *mi) {
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buttons |= 1;
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update = 1;
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};
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void MouseRptParser::OnRightButtonUp(MOUSEINFO *mi) {
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buttons &= ~2;
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update = 1;
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};
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void MouseRptParser::OnRightButtonDown(MOUSEINFO *mi) {
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buttons |= 2;
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update = 1;
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};
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void MouseRptParser::OnMiddleButtonUp(MOUSEINFO *mi) {
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};
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void MouseRptParser::OnMiddleButtonDown(MOUSEINFO *mi) {
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};
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USB Usb;
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USBHub Hub(&Usb);
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HIDBoot<USB_HID_PROTOCOL_MOUSE> HidMouse(&Usb);
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MouseRptParser Prs;
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static uint8_t potmouse_xcounter = 0; ///< x axis counter
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static uint8_t potmouse_ycounter = 0; ///< y axis counter
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static volatile uint16_t x; ///< precalculated OCR1A value (YPOT)
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static volatile uint16_t y; ///< precalculated OCR1B value (XPOT)
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void setup() {
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if (Usb.Init() == -1) {
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}
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delay(200);
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HidMouse.SetReportParser(0, &Prs);
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pinMode(LBTN, INPUT); pinMode(RBTN, INPUT);
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pinMode(POTX, OUTPUT); pinMode(POTY, OUTPUT);
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digitalWrite(POTX, HIGH); digitalWrite(POTY, HIGH);
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pinMode(POTSENSE, INPUT); // pullup off, hi-biased by OC1A
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TIMSK1 = _BV(ICIE1); // ICIE1: Timer/Counter1, Input Capture Interrupt Enable
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TCCR1B = _BV(ICNC1) | _BV(CS10); //CS10: No prescaler, ICNC1: Input Capture Noise Canceller
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}
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void loop() {
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Usb.Task();
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if (update) {
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potmouse_xcounter = (potmouse_xcounter + (dx/2)) & 0177; // modulo 128
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potmouse_ycounter = (potmouse_ycounter - (dy/2)) & 0177;
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(buttons & 001) ? pinMode(LBTN, OUTPUT) : pinMode(LBTN, INPUT);
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(buttons & 002) ? pinMode(RBTN, OUTPUT) : pinMode(RBTN, INPUT);
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cli();
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x = (320 + potmouse_xcounter)*16; //16 clock cycles = 1us
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y = (320 + potmouse_ycounter)*16;
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sei();
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update = 0;
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}
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delayMicroseconds(100);
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}
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ISR(TIMER1_CAPT_vect) { // ICIE1
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// OC1A/OC1B -> LOW
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TCCR1A = _BV(COM1A1) | _BV(COM1B1); // Clear OC1A / OC1B on Compare Match (Set output to low level)
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TCCR1C |= _BV(FOC1A) | _BV(FOC1B); // FOC1A / FOC1B Force Output Compare A and B
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// init the output compare values
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OCR1A = ICR1 + x; //ICR1: Input Capture Register
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OCR1B = ICR1 + y;
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TCCR1A = _BV(COM1A1) | _BV(COM1A0) | _BV(COM1B1) | _BV(COM1B0); // Set OC1A / OC1B on Compare Match (Set output to high level).
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TIMSK1 = _BV(OCIE1A); // OCIE1A: Timer/Counter Output Compare Match Interrupt Enable A // disable other TIMER1 interrupts
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TIFR1 = 0xff; // Clear all pending TIMER1 interrupt flags
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}
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ISR(TIMER1_COMPA_vect) { // OCIE1A
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TIMSK1 = _BV(ICIE1); // ICIE1: Timer/Counter1, Input Capture Interrupt Enable // disable other TIMER1 interrupts
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TIFR1 = 0xff; // Clear all pending TIMER1 interrupt flags
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}
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