mirror of
https://github.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter
synced 2024-11-21 08:35:05 -05:00
269 lines
6.7 KiB
C++
269 lines
6.7 KiB
C++
#define USBHOST
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#ifdef USBHOST
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#include <hidboot.h>
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#include <usbhub.h>
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#endif
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#define POTSENSE 4 //ICP1 (Arduino Pro Micro: pin4, Arduino Uno: pin8)
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#define POTX 9 ///< X-line, also OC1A
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#define POTY 10 ///< Y-line, also OC1B
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#define LBTN 5 ///< Joystick FIRE switch
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#define RBTN 6 ///< Joystick UP switch
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//#define DEBUG
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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 = 0;
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#ifdef USBHOST
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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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#ifdef DEBUG
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Serial.print("dx=");
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Serial.print(mi->dX, DEC);
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Serial.print(" dy=");
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Serial.println(mi->dY, DEC);
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#endif
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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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#ifdef DEBUG
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Serial.println("L Butt Up");
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#endif
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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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#ifdef DEBUG
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Serial.println("L Butt Dn");
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#endif
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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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#ifdef DEBUG
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Serial.println("R Butt Up");
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#endif
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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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#ifdef DEBUG
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Serial.println("R Butt Dn");
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#endif
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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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#ifdef DEBUG
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Serial.println("M Butt Up");
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#endif
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};
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void MouseRptParser::OnMiddleButtonDown(MOUSEINFO *mi) {
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#ifdef DEBUG
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Serial.println("M Butt Dn");
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#endif
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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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#endif
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static uint8_t potmouse_xcounter; ///< x axis counter
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static uint8_t potmouse_ycounter; ///< y axis counter
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static volatile uint16_t ocr1a_load; ///< precalculated OCR1A value (YPOT)
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static volatile uint16_t ocr1b_load; ///< precalculated OCR1B value (XPOT)
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void setup() {
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#ifdef DEBUG
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Serial.begin(115200);
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delay(200);
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Serial.println("Start");
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Serial.flush();
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#endif
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#ifdef USBHOST
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if (Usb.Init() == -1) {
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#ifdef DEBUG
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Serial.println("OSC did not start.");
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#endif
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}
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delay(200);
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HidMouse.SetReportParser(0, &Prs);
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#endif
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#ifdef DEBUG
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Serial.flush();
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delay(200);
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#endif
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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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potmouse_movt(0,0,0);
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startTimers();
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#ifndef USBHOST
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TIMSK0 = 0;
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#endif
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}
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void loop() {
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#ifdef USBHOST
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Usb.Task();
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if (update) {
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potmouse_movt(dx, dy, buttons);
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update = 0;
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}
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delayMicroseconds(200);
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#endif
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#ifndef USBHOST
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potmouse_movt(0, 0, buttons);
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#endif
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}
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volatile uint8_t counter = 0;
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volatile uint8_t upd = 0;
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void potmouse_movt(int16_t dx, int16_t dy, uint8_t button) {
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uint16_t a, b;
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#ifndef USBHOST
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if (upd) {
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potmouse_xcounter++;
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potmouse_ycounter++;
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upd = 0;
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}
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#endif
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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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//for testing
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//potmouse_xcounter = (millis()>>6) & 077; // modulo 64
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//potmouse_ycounter = (millis()>>6) & 077;
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(button & 001) ? pinMode(LBTN, OUTPUT) : pinMode(LBTN, INPUT);
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(button & 002) ? pinMode(RBTN, OUTPUT) : pinMode(RBTN, INPUT);
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// scale should be 2x here, but for this particular chip, 66 counts work better where
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// 64 counds should be. so 66/64=100/96 and times two
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//a = 320*2 + ((uint32_t)potmouse_xcounter)*200/fix;
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//b = 320*2 + ((uint32_t)potmouse_ycounter)*200/fix;
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//a = 320*200/fix + potmouse_xcounter*2;
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//b = 320*200/fix + potmouse_ycounter*2;
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a = 320*2 + potmouse_xcounter*2;
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b = 320*2 + potmouse_ycounter*2;
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ocr1a_load = a;
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ocr1b_load = b;
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}
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inline void startTimers() {
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#ifdef DEBUG
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Serial.println("startTimers"); Serial.flush();
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#endif
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cli();
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// Prepare TIMER1
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//TCCR1A = 0;
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// ICIE1: Timer/Counter Input Capture Interrupt Enable, ISR(TIMER1_CAPT_vect)
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// TOIE1: Timer/Counter Overflow Interrupt Enable
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TIMSK1 = _BV(ICIE1); // ICIE1: Timer/Counter1, Input Capture Interrupt Enable
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// Start timer1, Input Capture setup
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// ICNC1: Input Capture Noise Canceller (Bit 7 of register TCCR1B)
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// ICES1: Input Capture Edge Select (Bit 6 of register TCCR1B) 0 = FALLING, 1 = RISING
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// CS12, CS11, CS10: Set prescaler (CS11 TIMER1: F_CPU/8)
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TCCR1B = _BV(ICNC1) | _BV(CS11);
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//TCCR1B = _BV(CS11);
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TIFR1 = 0xff; // Clear all pending TIMER1 interrupt flags
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sei();
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}
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ISR(TIMER1_CAPT_vect) {
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// Now we little after start of SID reading process
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// SID trigger pulse timer value is in ICR1
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uint16_t a = ICR1;
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#ifdef DEBUG
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Serial.println("TIMER1_CAPT_vect:");
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#endif
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#ifndef USBHOST
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counter++;
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counter &= 63;
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if (counter == 0) upd = 1;
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#endif
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// clear OC1A/OC1B (9 and 10 to LOW):
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// 1. set output compare to clear OC1A/OC1B ("10" in table 37 on page 97)
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TCCR1A = _BV(COM1A1) | _BV(COM1B1); // Clear OC1A / OC1B on Compare Match (Set output to low level).
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// 2. force output compare to make it happen (doesn't raise interrupts)
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TCCR1C |= _BV(FOC1A) | _BV(FOC1B); // FOC1A / FOC1B Force Output Compare A and B (that are in register TCCR1C)
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// OCIE1A: Timer/Counter Output Compare Match Interrupt Enable A, ISR(TIMER1_COMPA_vect) // disable ICIE1, Input Capture Interrupt
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TIMSK1 = _BV(OCIE1A);
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// init the output compare values
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OCR1A = ocr1a_load + a;
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OCR1B = ocr1b_load + a;
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// Set OC1A/OC1B on Compare Match (Set output to high level)
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// WGM13:0 = 00, normal mode: count from BOTTOM to MAX
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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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#ifdef DEBUG
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Serial.print(c); Serial.print(" "); Serial.print(a); Serial.print(" "); Serial.println(b);
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Serial.flush();
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#endif
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TIFR1 = 0xff; //clear all timer1 interrupt flags
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}
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ISR(TIMER1_COMPA_vect) {
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// now potx are sent. we don't know if poty is still in progress.
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// POTX is HIGH from OC1A TIMER1 compare match. POTY is ?.
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#ifdef DEBUG
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Serial.println("TIMER1_COMPA_vect"); Serial.flush();
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#endif
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TIMSK1 = _BV(ICIE1); // ICIE1: Timer/Counter1, Input Capture Interrupt Enable // disable TIMER1 interrupts (Compare Match Interrupt A)
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TIFR1 = 0xff; //clear all timer1 interrupt flags
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}
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