ATMEGA 16U2 code for Arduino Uno to act as a joystick
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#include <EasyTransfer.h>
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#define AXES 6
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#define BUTTONS 8
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const long speedLimit = 10;
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unsigned long lastSend = 0;
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int buttonPins[BUTTONS] = { 2, 3, 4, 5, 6, 7, 8, 9 };
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int analogPins[AXES] = { 16, 17, 18, 19, 20, 21 };
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int axisMinima[AXES];
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int axisMaxima[AXES];
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EasyTransfer ET;
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struct SEND_DATA_STRUCTURE{
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//THIS MUST BE EXACTLY THE SAME ON THE OTHER ARDUINO
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int16_t joyx;
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int16_t joyy;
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int8_t joyz;
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int16_t joyxr;
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int16_t joyyr;
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int8_t joyzr;
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uint32_t buttonState;
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};
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SEND_DATA_STRUCTURE controllerState;
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void setup() {
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Serial.begin(2000000);
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ET.begin(details(controllerState), &Serial);
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for (int i = 0; i < BUTTONS; i++) { pinMode(buttonPins[i], INPUT_PULLUP); }
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for (int i = 0; i < AXES; i++) {
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pinMode(analogPins[i], INPUT);
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axisMinima[i] = 512;
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axisMaxima[i] = 768;
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}
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}
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uint32_t readButtons(){
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uint32_t buttonStateNow = 0;
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for (int i=0; i<BUTTONS; i++) { bitWrite(buttonStateNow, i, !digitalRead(buttonPins[i])); }
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return buttonStateNow;
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}
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void loop(){
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int analogValue[AXES];
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for (int i = 0; i < AXES; i++){
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analogValue[i] = analogRead(analogPins[i]);
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if (analogValue[i] > axisMaxima[i]) { axisMaxima[i] = analogValue[i]; }
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else if (analogValue[i] < axisMinima[i]) { axisMinima[i] = analogValue[i]; }
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if (i < 4) { analogValue[i] = map(analogValue[i], axisMinima[i], axisMaxima[i], -32768, 32767); }
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else { analogValue[i] = map(analogValue[i], axisMinima[i], axisMaxima[i], -128, 127); }
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}
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controllerState.joyx = analogValue[0];
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controllerState.joyxr = analogValue[1];
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controllerState.joyy = analogValue[2];
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controllerState.joyyr = analogValue[3];
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controllerState.joyz = analogValue[4];
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controllerState.joyzr = analogValue[5];
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controllerState.buttonState = readButtons();
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if ((millis() - lastSend) > speedLimit ) {
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ET.sendData();
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lastSend = millis();
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}
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}
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