RetroConnector/Joystick-Shield/joystick_shield_rezero/joystick_shield_rezero.ino
Charles Mangin 78d3d86f6b another big Post-Kfest update
merging branches, code cleanup, new revisions of boards
2016-10-04 15:20:30 -04:00

183 lines
3.7 KiB
C++

/*
Thanks to Dagen Brock:
BASIC program to test joystick in Apple II emulators:
5 DP = .10: REM Deadzone Percentage
10 XLEFT = 0:YUP = 0:XRIGHT = 279:YBOT = 159: REM Screen Bounds
15 REM Set target box coordinates
20 HALF = XRIGHT / 2:D1 = INT (HALF - (HALF * DP)):D2 = INT (HALF + (HALF * DP))
25 HALF = YBOT / 2:D3 = INT (HALF - (HALF * DP)):D4 = INT (HALF + (HALF * DP))
30 HGR : HCOLOR= 3
35 REM Draw edge box
40 X1 = XLEFT:Y1 = YUP:X2 = XRIGHT:Y2 = YBOT: GOSUB 2000:X1 = X1 + 1:X2 = X2 - 1:Y1 = Y1 + 1:Y2 = Y2 - 1: GOSUB 2000
50 P0 = PDL (0):P1 = PDL (1): GOSUB 3000
55 PRINT P0,P1
60 GOTO 50
2000 HPLOT X1,Y1 TO X1,Y2: HPLOT X1,Y2 TO X2,Y2: HPLOT X2,Y2 TO X2,Y1: HPLOT X2,Y1 TO X1,Y1
2002 RETURN
3000 X = INT (P0 * 274 / 255 + 2):Y = INT (P1 * 154 / 255 + 2)
3010 X1 = X:X2 = X + 1:Y1 = Y:Y2 = Y1 + 1: GOSUB 2000
3020 GOSUB 4000: HCOLOR= 0: GOSUB 2000: HCOLOR= 3
3050 RETURN
4000 HPLOT D1,D3 TO D1,D4: HPLOT D1,D4 TO D2,D4: HPLOT D2,D4 TO D2,D3: HPLOT D2,D3 TO D1,D3
4010 RETURN : REM End Draw Target Box
*/
/* Read Joystick
*/
int ZEROPin = 0;
int XPin = A8;
int YPin = A7;
int Button0Pin = 9;
int Button1Pin = 10;
int JoystickX;
int JoystickY;
int XMax = 0;
int YMax = 0;
int XMin = 1023;
int YMin = 1023;
/*
adjust CalibrationMax up if the range on your joystick is too restricted to calibrate
adjust down if your joystick "jumps" around a lot. 800 seems to be a pretty good spot for the sticks i've tested.
*/
// int CalibrationMax = 800; // allows for weird "jumpy" joystick potentiometers. these things are 30 years old, after all.
int CalibrationMax = 9999; // no limit.
void setup() {
// Serial.begin(9600);
pinMode(ZEROPin, INPUT_PULLUP);
pinMode(Button0Pin, INPUT);
pinMode(Button1Pin, INPUT);
Joystick.useManualSend(true);
}
void loop() {
/* calibrate on button press */
if (digitalRead(ZEROPin) == LOW) {
XMax = 0;
YMax = 0;
XMin = 1023;
YMin = 1023;
delay(100);
// Serial.println("rezero");
}
/* auto calibrate:
save X, Y.
compare them to historical high/low values.
if higher/lower, reset highest/lowest variable
highest == 1023
lowest == 0
midway between now == 512
*/
JoystickX = 1023 - analogRead(XPin); // needs to be inverted!
JoystickY = 1023 - analogRead(YPin);
/* auto calibrate:
save X, Y.
compare them to historical high/low values.
if higher/lower, reset highest/lowest variable
highest == 1023
lowest == 0
midway between now == 512
*/
// record the maximum sensor value
// if ((JoystickX < CalibrationMax) && (JoystickX > XMax)) {
if (JoystickX > XMax) {
XMax = JoystickX;
}
// record the minimum sensor value
if (JoystickX < XMin) {
XMin = JoystickX;
}
// record the maximum sensor value
// if ((JoystickY < CalibrationMax) && (JoystickY > YMax)) {
if (JoystickY > YMax) {
YMax = JoystickY;
}
// record the minimum sensor value
if (JoystickY < YMin) {
YMin = JoystickY;
}
JoystickX = map(JoystickX, XMin, XMax, 0, 1023);
JoystickY = map(JoystickY, YMin, YMax, 0, 1023);
Joystick.X(JoystickX);
Joystick.Y(JoystickY);
Joystick.button(1, digitalRead(Button0Pin));
Joystick.button(2, digitalRead(Button1Pin));
Joystick.send_now();
/*
Serial.print(XMin);
Serial.print(" -- ");
Serial.print(JoystickX);
Serial.print(" -- ");
Serial.print(XMax);
Serial.print(" -- || -- ");
Serial.print(YMin);
Serial.print(" -- ");
Serial.print(JoystickY);
Serial.print(" -- ");
Serial.println(YMax);
delay(100);
*/
/*
Serial.print(JoystickX);
Serial.print(" -- ");
Serial.print(JoystickY);
Serial.print(" -- ");
Serial.print(digitalRead(Button0Pin));
Serial.print(" -- ");
Serial.print(digitalRead(Button1Pin));
Serial.println();
delay(100);
*/
}