mirror of https://github.com/falsovsky/arduino.git
113 lines
3.0 KiB
C++
113 lines
3.0 KiB
C++
/*
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Based on https://github.com/njguibert/NesJoystickArduino/
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Adapted for SNES with info from http://www.gamefaqs.com/snes/916396-super-nintendo/faqs/5395
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Snes Controller - Arduino
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White 5V - 5V
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Brown GND - GND
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Yellow (Clock) - Pin 13
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Orange (Latch) - Pin 12
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Red (Data) - Pin 11
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*/
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static int clock = 13; // set the clock pin
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static int latch = 12; // set the latch pin
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static int datin = 11; // set the data in pin
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JoyState_t joySt;
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void setup() {
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//Serial.begin(9600);
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//while (!Serial) ;
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pinMode(latch, OUTPUT);
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pinMode(clock, OUTPUT);
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pinMode(datin, INPUT);
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digitalWrite(latch, LOW);
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digitalWrite(clock, HIGH);
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joySt.zAxis = 127;
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}
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word controllerRead()
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{
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word data = 0;
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digitalWrite(latch, HIGH);
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delayMicroseconds(2);
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digitalWrite(latch, LOW);
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delayMicroseconds(1);
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digitalWrite(clock, LOW);
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delayMicroseconds(1);
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for (int i = 0; i < 16; i++)
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{
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data >>= 1;
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data |= (digitalRead(datin) ? 0x8000 : 0);
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digitalWrite(clock, HIGH);
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delayMicroseconds(2);
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digitalWrite(clock, LOW);
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delayMicroseconds(1);
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}
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digitalWrite(clock, HIGH);
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return data;
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}
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void loop() {
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/*
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Clock Cycle Button Reported
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=========== ===============
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1 B
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2 Y
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3 Select
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4 Start
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5 Up on joypad
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6 Down on joypad
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7 Left on joypad
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8 Right on joypad
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9 A
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10 X
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11 L
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12 R
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13 none (always high)
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14 none (always high)
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15 none (always high)
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16 none (always high)
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*/
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word controller_data = controllerRead(); // Read 16 bit of data
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//Serial.println(controller_data, BIN);
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joySt.buttons = 0; // Reset buttons
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joySt.buttons |= (!bitRead(controller_data, 0) << 0); // B - bit 1 - bit 1 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 1) << 1); // Y - bit 2 - bit 2 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 2) << 6); // Select - bit 3 - bit 7 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 3) << 7); // Start - bit 4 - bit 8 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 8) << 2); // A - bit 9 - bit 6 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 9) << 3); // X - bit 10 - bit 5 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 10) << 4); // L - bit 11 - bit 4 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 11) << 5); // R - bit 12 - bit 3 on the Joystick
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joySt.xAxis = 127; // Reset x axis
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joySt.yAxis = 127; // Rest y axis
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if (!bitRead(controller_data, 4)) // Up - bit 5
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joySt.yAxis = 0;
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if (!bitRead(controller_data, 5)) // Down - bit 6
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joySt.yAxis = 255;
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if (!bitRead(controller_data, 6)) // Left - bit 7
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joySt.xAxis = 0;
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if (!bitRead(controller_data, 7)) // Right - bit 8
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joySt.xAxis = 255;
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Joystick.setState(&joySt); // Update joystick state
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}
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