HW 5

Wave function:


#include <stdio.h>
#include <math.h>
#define PI 3.1415


int main(void)
{
  double T1, T2, A1, A2, wl1, wl2, wh1, wh2, wSum=0, wMax=0, wMin=0, t_in, t_fin, t_count, phase;

  printf("Input wave 1 period in seconds and wave height in meters: \n");
  scanf("%lf", &T1);
  scanf("%lf", &wh1);
  printf("Input wave 2 period in seconds and wave height in meters: \n");
  scanf("%lf", &T2);
  scanf("%lf", &wh2);
  printf("Input initial time and nubmer of 0.2s increments: \n");
  scanf("%lf", &t_in);
  scanf("%lf", &t_count);
  printf("Input phase shift in multiples of PI: \n");
  scanf("%lf", &phase);
  A1 = wh1/2;
  A2 = wh2/2;
  wl1 = (5.13 * pow(T1, 2))*0.3048;
  wl2 = (5.13 * pow(T2, 2))*0.3048;
  t_fin=t_in+t_count*0.2;
  printf("The wavelength of wave 1 is %5.3lf meters.\n", wl1);
  printf("The wavelength of wave 2 is %5.3lf meters.\n", wl2);
  printf("\nWave height calculations \n\n");
  for (t_in; t_in <= t_fin; t_in += 0.2)
  {
    wh1 = 2*A1*sin(((2*PI)/T1)*t_in);
    wh2 = 2*A2*sin((((2*PI)/T2)*t_in)+(PI*phase));
    wSum = wh1 + wh2;
    if (wSum >= wMax)
    {
      wMax = wSum;
    }
    else if (wSum <= wMin)
    {
      wMin = wSum;
    }
    printf("Wave 1 height:     Wave 2 height:     Sum:               Time:\n");
    printf("%6.3lf               %6.3lf              %6.3lf             %3.1lf\n", wh1, wh2, wSum, t_in);
  }

  printf("Maximum wave height is %6.3lf m\n", wMax);
  printf("Minimum wave height is %6.3lf m\n", wMin);

  return 0;
}

Convert ft/s to mi/h

#include <stdio.h>
#include <math.h>


int main(void)
{
  int ft;
  double mi, conv=0.681818181818;

  printf("Table of conversion for ft/s to mi/h\n\n");
  for (ft=1; ft <= 100; ft+=1)
  {
  mi = ft * conv;
  printf("Feet per second:                 Miles per hour:            \n");
  printf("%15.i               %15.3f\n", ft, mi);
  }

  return 0;
}



TEMP


boolean lastButton = LOW; //Last Button State
boolean currentButton = LOW; //Current Button State


const int TMP = 0;            //sensor pin
int TMP_OUT;
int TMP_CAL = 170;            //calibration temp
const int RLED = 11;
const int GLED = 10;             //LED pins
const int BLED = 9;
int d = 1;      //increment led interval
int R = 0;
int G = 0;             //LED colors
int B = 0;
const int cal = 2;            //calibration button pin

boolean debounce(boolean last)
{
  boolean current = digitalRead(cal); //Read the button state
  if (last != current) //if it's different...
  {
    delay(5); //wait 5ms
    current = digitalRead(cal); //read it again
  }
  return current; //return the current value
}


void setup()
{
  pinMode(RLED, OUTPUT);
  pinMode(GLED, OUTPUT);
  pinMode(BLED, OUTPUT);
  pinMode(cal, INPUT);
  Serial.begin(9600); //Start Serial Communication
}

void loop()
{
  TMP_OUT = analogRead(TMP);
  currentButton = debounce(lastButton);
  if (lastButton == LOW && currentButton == HIGH)
  {
    TMP_CAL = TMP_OUT;
  }
  lastButton = currentButton;
  if (TMP_OUT - TMP_CAL <= -8)
  {
    if (R > 10)
    {
      R -= d;
    }
    else
    {
      R = 0;
    }
    if (G > 10)
    {
      G -= d;
    }
    else
    {
      G = 0;
    }
    if (B < 250)
    {
      B += d;
    }
    analogWrite(RLED, R);
    analogWrite(GLED, G);
    analogWrite(BLED, B);
  }

  else if (TMP_OUT - TMP_CAL >= 8)
  {
    if (R < 250)
    {
      R += d;
    }
    if (G > 10)
    {
      G -= d;
    }
    else
    {
      G = 0;
    }
    if (B > 10)
    {
      B -= d;
    }
    else
    {
      B = 0;
    }
    analogWrite(RLED, R);
    analogWrite(GLED, G);
    analogWrite(BLED, B);
  }

  else
  {
    if (R > 10)
    {
      R -= d;
    }
    else
    {
      R = 0;
    }
    if (G < 250)
    {
      G += d;
    }
    if (B > 10)
    {
      B -= d;
    }
    else
    {
      B = 0;
    }
    analogWrite(RLED, R);
    analogWrite(GLED, G);
    analogWrite(BLED, B);
  }
  Serial.println(TMP_OUT);
  Serial.println(TMP_CAL);
  delay (3);
}