Revise paste MPU6050 PPM rev_08

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- Project: MPU6050 PPM
	- Source Code compiled for: Arduino Mega
	- Source Code created on: 2024-06-21 07:54:58

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Create a head tracking system with MPU6050 */
	/* gyroscope (I2C: SDA D20, SCL D21, Interrupt D2) */
	/* and PPMEncoder library. Ensure accurate data */
	/* capture and encoding for real-time head movement */
	/* tracking. Send out data in ppm format. */
/****** SYSTEM REQUIREMENT 2 *****/
	/* convert potentiometer input to ppm signal as well */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <MPU6050_6Axis_MotionApps20.h> // Include the DMP header for MPU6050
#include <PPMEncoder.h> //http://github.com/schinken/PPMEncoder

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void dmpDataReady(void);

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t gyro_MPU6050_Interrupt_PIN_D2 = 2;

/***** DEFINITION OF ANALOG INPUT PINS *****/
const uint8_t steering_Potentiometer_Vout_PIN_A0 = A0;

/***** DEFINITION OF I2C PINS *****/
const uint8_t gyro_MPU6050_I2C_PIN_SDA_D20 = 20;
const uint8_t gyro_MPU6050_I2C_PIN_SCL_D21 = 21;
const uint8_t gyro_MPU6050_I2C_SLAVE_ADDRESS = 104;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
MPU6050 mpu(gyro_MPU6050_I2C_SLAVE_ADDRESS); // Initialize MPU6050 with the specified I2C address
// PPMEncoder ppmEncoder; // Remove this line

/****** GLOBAL VARIABLES *****/
bool dmpReady = false;  // set true if DMP init was successful
uint8_t mpuIntStatus;   // holds actual interrupt status byte from MPU
uint8_t devStatus;      // return status after each device operation (0 = success, !0 = error)
uint16_t packetSize;    // expected DMP packet size (default is 42 bytes)
uint16_t fifoCount;     // count of all bytes currently in FIFO
uint8_t fifoBuffer[64]; // FIFO storage buffer

Quaternion q;           // [w, x, y, z]         quaternion container
VectorFloat gravity;    // [x, y, z]            gravity vector
float ypr[3];           // [yaw, pitch, roll]   yaw/pitch/roll container and gravity vector

volatile bool mpuInterrupt = false; // indicates whether MPU interrupt pin has gone high

void dmpDataReady() {
    mpuInterrupt = true;
}

void setup(void)
{
    // put your setup code here, to run once:

pinMode(gyro_MPU6050_Interrupt_PIN_D2, INPUT);
    pinMode(steering_Potentiometer_Vout_PIN_A0, INPUT);

// Initialize I2C communication
    Wire.begin();
    Wire.setClock(400000); // Set I2C clock to 400kHz

// Initialize MPU6050
    Serial.begin(115200);
    while (!Serial); // Wait for the serial port to open (for Leonardo/Micro)
    Serial.println(F("Initializing I2C devices..."));
    mpu.initialize();

// Verify connection
    Serial.println(F("Testing device connections..."));
    Serial.println(mpu.testConnection() ? F("MPU6050 connection successful") : F("MPU6050 connection failed"));

// Initialize DMP
    Serial.println(F("Initializing DMP..."));
    devStatus = mpu.dmpInitialize();

// supply your own gyro offsets here, scaled for min sensitivity
    mpu.setXGyroOffset(220);
    mpu.setYGyroOffset(76);
    mpu.setZGyroOffset(-85);
    mpu.setZAccelOffset(1788); // 1688 factory default for my test chip

// make sure it worked (returns 0 if so)
    if (devStatus == 0) {
        // turn on the DMP, now that it's ready
        Serial.println(F("Enabling DMP..."));
        mpu.setDMPEnabled(true);

// enable Arduino interrupt detection
        Serial.print(F("Enabling interrupt detection (Arduino external interrupt "));
        Serial.print(digitalPinToInterrupt(gyro_MPU6050_Interrupt_PIN_D2));
        Serial.println(F(")..."));
        attachInterrupt(digitalPinToInterrupt(gyro_MPU6050_Interrupt_PIN_D2), dmpDataReady, RISING);
        mpuIntStatus = mpu.getIntStatus();

// set our DMP ready flag
        Serial.println(F("DMP ready! Waiting for first interrupt..."));
        dmpReady = true;

// get expected DMP packet size for later comparison
        packetSize = mpu.dmpGetFIFOPacketSize();
    } else {
        // ERROR!
        // 1 = initial memory load failed
        // 2 = DMP configuration updates failed
        // (if it's going to break, usually the code will be 1)
        Serial.print(F("DMP Initialization failed (code "));
        Serial.print(devStatus);
        Serial.println(F(")"));
    }

// Initialize PPM Encoder
    ppmEncoder.begin(10); // Assuming pin 10 for PPM output
}

void loop(void)
{
    // put your main code here, to run repeatedly:

// if programming failed, don't try to do anything
    if (!dmpReady) return;

// wait for MPU interrupt or extra packet(s) available
    while (!mpuInterrupt && fifoCount < packetSize) {
        // other program behavior stuff here
        // .
        // .
        // .
        // if you are really paranoid you can frequently test in between other
        // stuff to see if mpuInterrupt is true, and if so, "break;" from the
        // while() loop to immediately process the MPU data
        // .
        // .
        // .
    }

// reset interrupt flag and get INT_STATUS byte
    mpuInterrupt = false;
    mpuIntStatus = mpu.getIntStatus();

// get current FIFO count
    fifoCount = mpu.getFIFOCount();

// check for overflow (this should never happen unless our code is too inefficient)
    if ((mpuIntStatus & 0x10) || fifoCount == 1024) {
        // reset so we can continue cleanly
        mpu.resetFIFO();
        Serial.println(F("FIFO overflow!"));

// otherwise, check for DMP data ready interrupt (this should happen frequently)
    } else if (mpuIntStatus & 0x02) {
        // wait for correct available data length, should be a VERY short wait
        while (fifoCount < packetSize) fifoCount = mpu.getFIFOCount();

// read a packet from FIFO
        mpu.getFIFOBytes(fifoBuffer, packetSize);

// track FIFO count here in case there is > 1 packet available
        // (this lets us immediately read more without waiting for an interrupt)
        fifoCount -= packetSize;

mpu.dmpGetQuaternion(&q, fifoBuffer);
        mpu.dmpGetGravity(&gravity, &q);
        mpu.dmpGetYawPitchRoll(ypr, &q, &gravity);
        Serial.print("ypr\t");
        Serial.print(ypr[0] * 180/M_PI);
        Serial.print("\t");
        Serial.print(ypr[1] * 180/M_PI);
        Serial.print("\t");
        Serial.println(ypr[2] * 180/M_PI);

// Convert Yaw, Pitch, Roll to PPM signals
        ppmEncoder.setChannel(0, map(ypr[0] * 180/M_PI, -180, 180, PPMEncoder::MIN, PPMEncoder::MAX));
        ppmEncoder.setChannel(1, map(ypr[1] * 180/M_PI, -90, 90, PPMEncoder::MIN, PPMEncoder::MAX));
        ppmEncoder.setChannel(2, map(ypr[2] * 180/M_PI, -90, 90, PPMEncoder::MIN, PPMEncoder::MAX));
    }

// Read potentiometer value and convert to PPM signal
    int potValue = analogRead(steering_Potentiometer_Vout_PIN_A0);
    ppmEncoder.setChannel(3, map(potValue, 0, 1023, PPMEncoder::MIN, PPMEncoder::MAX));
}

/* END CODE */