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BME_261_final.ino
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BME_261_final.ino
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#include <Wire.h>
#include <math.h>
const int MPU_addr=0x68; // I2C address of the MPU-6050
int motorPin = 11;
long tempAcX,tempAcY,tempAcZ,Tmp,tempGyX,tempGyY,tempGyZ;
//int AcX [1000];
//int AcY [1000];
//int AcZ [1000];
long GyX [3];
long GyY [3];
long GyZ [3];
long GyYZ [3];
//square and peaks
boolean useAlgorithm1 = false;
//zero and peaks
boolean useAlgorithm2 = true;
//zero and combine
boolean useAlgorithm3 = false;
//multiply and inverse
boolean useAlgorithm4 = false;
boolean normalStep = false;
int counter = 0;
int FoGCounter = 0;
int numPeaks = 0;
void setup() {
Serial.begin(9600);
pinMode(motorPin, OUTPUT);
analogWrite(motorPin, 0);
Wire.begin(1);
Wire.beginTransmission(MPU_addr);
Wire.write(0x6B); // PWR_MGMT_1 register
Wire.write(0); // set to zero (wakes up the MPU-6050)
Wire.endTransmission(true);
updateGy(0);
updateGy(1);
updateGy(2);
if(useAlgorithm2 || useAlgorithm3)
{
if(GyY[0] < 0)
{
GyY[0] = 0;
}
if(GyY[1] < 0)
{
GyY[1] = 0;
}
if(GyY[2] < 0)
{
GyY[2] = 0;
}
if(GyZ[0] < 0)
{
GyZ[0] = 0;
}
if(GyZ[1] < 0)
{
GyZ[1] = 0;
}
if(GyZ[2] < 0)
{
GyZ[2] = 0;
}
}
}
void loop() {
if(FoGCounter != 0)
{
FoGCounter ++;
}
GyX[0] = GyX[1];
GyY[0] = GyY[1];
GyZ[0] = GyZ[1];
GyX[1] = GyX[2];
GyY[1] = GyY[2];
GyZ[1] = GyZ[2];
updateGy(2);
if(useAlgorithm1)
{
long square[] = {abs(GyZ[0]) * abs(GyZ[0]), abs(GyZ[1]) * abs(GyZ[1]), abs(GyZ[2]) * abs(GyZ[2]) };
if( isMax(square) && square[1] > 400000000 && !normalStep)
{
normalStep = true;
numPeaks = 0;
}
if(normalStep)
{
counter++;
}
//Serial.println(square[1]);
if(counter == 15)
{
normalStep = false;
counter = 0;
}
if(counter==0 && isMax(square)) // throw out ten points after normal step
{
// square threshold
if (isFogSq(square[1]))
{
numPeaks++;
if(numPeaks > 5)
{
Serial.println("Freezing");
analogWrite(motorPin, 123);
delay(1000);
analogWrite(motorPin, 0);
numPeaks = 0;
}
}
}
}
else if(useAlgorithm2)
{
if(GyZ[2] < 0)
{
GyZ[2] = 0;
}
if(isMaxZ(GyZ) && GyZ[1] > 20000)
{
counter = 0;
FoGCounter = 0;
}
else if(isMaxZ(GyZ) && isFoGZZero(GyZ[1]))
{
counter++;
if(FoGCounter == 0)
{
FoGCounter++;
}
else if(FoGCounter == 100)
{
counter = 0;
FoGCounter = 0;
}
if(counter > 2)
{
Serial.println("Freezing");
analogWrite(motorPin, 123);
delay(1000);
analogWrite(motorPin, 0);
counter = 0;
}
}
}
else if(useAlgorithm3)
{
if(GyZ[2] < 0)
{
GyZ[2] = 0;
}
if(GyY[2] < 0)
{
GyY[2] = 0;
}
for(int x=0;x<3;x++)
{
GyYZ[x] = GyY[x] * GyZ[x];
}
if(isMaxYZ(GyYZ) && GyYZ[1] > 120000000)
{
counter = 0;
}
else if(isMaxYZ(GyYZ) && isFoGYZZero(GyYZ[1]))
{
counter++;
if(counter > 1)
{
Serial.println("Freezing");
analogWrite(motorPin, 123);
delay(1000);
analogWrite(motorPin, 0);
counter = 0;
}
}
}
else if(useAlgorithm4)
{
long mult[] = {abs(GyY[0]) * abs(GyZ[0]), abs(GyY[1]) * abs(GyZ[1]), abs(GyY[2]) * abs(GyZ[2]) };
}
delay(10);
}
void updateGy(int pos)
{
Wire.beginTransmission(MPU_addr);
Wire.write(0x3B); // starting with register 0x3B (ACCEL_XOUT_H)
Wire.endTransmission(false);
Wire.requestFrom(MPU_addr,14,true); // request a total of 14 registers
tempAcX=Wire.read()<<8|Wire.read(); // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
tempAcY=Wire.read()<<8|Wire.read(); // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
tempAcZ=Wire.read()<<8|Wire.read(); // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
Tmp=Wire.read()<<8|Wire.read(); // 0x41 (TEMP_OUT_H) & 0x42 (TEMP_OUT_L)
tempGyX=Wire.read()<<8|Wire.read(); // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
tempGyY=Wire.read()<<8|Wire.read(); // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
tempGyZ=Wire.read()<<8|Wire.read(); // 0x47 (GYRO_ZOUT_H) & 0x48 (GYRO_ZOUT_L)
GyX[pos] = tempGyX;
GyY[pos] = -tempGyY;
GyZ[pos] = tempGyZ;
}
//CONSIDER CHANGING TO OR
boolean isMax(long values[])
{
return (values[1] - values[0] > 2000000 && values[1] - values[2] > 2000000);
}
boolean isMaxZ(long values[])
{
return (values[1] - values[0] > 500 && values[1] - values[2] > 500);
}
boolean isMaxYZ(long values[])
{
return (values[1] - values[0] > 500 && values[1] - values[2] > 500);
}
boolean isFogSq(long square)
{
return (square > 10000000 && square < 150000000);
}
boolean isFoGZZero(long z)
{
return (z > 2000 && z < 20000);
}
boolean isFoGYZZero(long yz)
{
return (yz > 5000000 && yz < 100000000);
}