mirror of https://github.com/falsovsky/arduino.git
109 lines
2.9 KiB
C++
109 lines
2.9 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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pinMode(latch,OUTPUT);
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pinMode(clock,OUTPUT);
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pinMode(datin,INPUT);
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digitalWrite(latch,HIGH);
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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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word data = 0;
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digitalWrite(latch,LOW);
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digitalWrite(clock,LOW);
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digitalWrite(latch,HIGH);
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delayMicroseconds(2);
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digitalWrite(latch,LOW);
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data = digitalRead(datin);
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for (int i = 1; i <= 15; i ++) {
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digitalWrite(clock,HIGH);
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delayMicroseconds(2);
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data = data << 1;
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data = data | digitalRead(datin) ;
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delayMicroseconds(2);
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digitalWrite(clock,LOW);
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}
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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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joySt.buttons = 0; // Reset buttons
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joySt.buttons |= (!bitRead(controller_data, 15) << 0); // B - bit 16 - bit 1 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 14) << 1); // Y - bit 15 - bit 2 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 13) << 6); // Select - bit 14 - bit 7 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 12) << 7); // Start - bit 13 - bit 8 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 7) << 2); // A - bit 8 - bit 6 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 6) << 3); // X - bit 7 - bit 5 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 5) << 4); // L - bit 6 - bit 4 on the Joystick
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joySt.buttons |= (!bitRead(controller_data, 4) << 5); // R - bit 5 - 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, 11)) // Up - bit 12
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joySt.yAxis = 0;
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if (!bitRead(controller_data, 10)) // Down - bit 11
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joySt.yAxis = 255;
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if (!bitRead(controller_data, 9)) // Left - bit 10
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joySt.xAxis = 0;
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if (!bitRead(controller_data, 8)) // Right - bit 9
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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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