Homework Number 3

//Arduino sketch for de-bouncing 2 buttons, with 1 button being a touch sensor
int touch = 7;
int red = 10;
int button = 2;
int led = 3;
boolean lastButton = LOW;
boolean currentButton = LOW;
boolean ledOn = false;
boolean lastTouch = LOW;
boolean currentTouch= LOW;
boolean touchon = false;

void setup() {
  // put your setup code here, to run once:
  pinMode(led, OUTPUT);
  pinMode(button, INPUT);
  pinMode(red, OUTPUT);
  pinMode(touch, INPUT);
 
}
boolean debounce (boolean last){
  boolean current = digitalRead(button);
  if (last != current){
    delay(5);
    current = digitalRead(button);

    return current;
  }
}

boolean debounce_2 (boolean last) {
  boolean current = digitalRead(touch);
  if (last != current){
    delay(5);
    current = digitalRead(touch);
    return current;
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  currentButton = debounce(lastButton);
  if  (lastButton == LOW && currentButton == HIGH){
    ledOn = !ledOn;
  }
  lastButton = currentButton; //reset button value
  digitalWrite(led, ledOn); // change the led state

  currentTouch = debounce_2(lastTouch);
  if (lastTouch == LOW && currentTouch == HIGH){
    touchon = !touchon;   
  }
  lastTouch = currentTouch; // reset touch sensor value
  digitalWrite(red, touchon); // change the red led status
}



LINEAR INTERPOLATION 
/* This program uses linear interpolation to */
/* compute the freezing temperature of seawater. */
/*#3. If the program contained data in Centigrade, the program would be changed so that the input values were converted to Centigrade before interpolating. */
#include <stdio.h>
#include <math.h>
int main(void)
{
/* Declare variables. */
char interpolate, output_method;
double sal_a, fp_a, sal_b, fp_b, sal_c, fp_c;
char more = 'y';
/* Get user input from the keyboard. */
while (more ='y') {
printf("Would you like to interpolate for (f)reezing temperature or (s)alinity?");
scanf(" %c", &interpolate);
printf("Enter first data point (salinity and then freezing temperature): \n");
scanf("%lf %lf",&sal_a,&fp_a);
printf("Enter second data point (salinity and then freezing temperature): \n");
scanf("%lf %lf",&sal_c,&fp_c);
if (interpolate == 'f'){
  printf("Enter new salinity: \n");
 scanf("%lf",&sal_b);
// Use linear interpolation to compute new freezing temperature.
 fp_b = fp_a + (sal_b-sal_a)/(sal_c-sal_a)*(fp_c - fp_a);
/* Print new freezing temperature. */
 printf("Enter ouput method: (c)entigrade, (f)ahrenheit, (b)oth");
 scanf(" %c", &output_method);
 if (output_method == 'f'){
 printf("New freezing temperature in degrees F: %4.1f \n",fp_b); }
 if (output_method == 'c'){
 printf("New freezing temperature in degrees C: %4.1f \n", (fp_b-32)*5/9); }
 if (output_method == 'b'){
  printf("New freezing temperature in degrees F: %4.1f \n",fp_b);
  printf("New freezing temperature in degrees C: %4.1f \n", (fp_b-32)*5/9); }
}
if (interpolate =='s'){
 printf("Enter new freezing point: \n");
 scanf(" %lf", &fp_b);
 sal_b = sal_a + ((fp_b - fp_a)/(fp_c - fp_a))*(sal_c-sal_a);
 printf("New Salinity in parts per thousand: %3.1f \n",
 sal_b);
}
printf("Would you like to interpolate again? (y/n)");
scanf(" %c", &more);
}
return 0; /* Exit program. */
}

Comments

Post a Comment

Popular posts from this blog

Seismic Code

/* determines the times of possible seismic events. */ #include <stdio.h> #define FILENAME "seismic1.txt" #define MAX_SIZE 1000 float THRESHOLD = 0; int x = 0; int main(void) { /* Declare variables and function prototypes. */ while(THRESHOLD <=2 1){ printf("Enter Threshold: \n"); scanf(" %f ", &THRESHOLD); printf("Threshold: %f \n", THRESHOLD); } int k, npts, short_window, long_window; double sensor[MAX_SIZE], time_incr, short_power, long_power, ratio; FILE *file_ptr; double power_w(double *ptr,int n); /* Read sensor data file. */ file_ptr = fopen(FILENAME,"r"); if (file_ptr == NULL) printf("Error opening input file. \n"); else { fscanf(file_ptr,"%d %lf",&npts,&time_incr); if (npts > MAX_SIZE) printf("Data file too large for array. \n"); else { /* Read data into an array. */ for (k=0; k<=npts-1; k++) fscanf(file_ptr,"%l...
Read more

Strings

#include <stdio.h> #include <string.h> int main(void) { /* Declare and initialize variables. */ int count=0; int choice = 0; int l_l, l_s; char long_str[80]; char short_str[79]; char *ptr1=long_str, *ptr2=short_str; while (choice != 1 && choice != 2){ printf( "1. read from file \n OR 2. input longstring "); scanf(" %i", &choice); } printf(" \n"); if( choice == 1) { FILE *file; file = fopen("longstring.txt", "r"); if(file){ fgets(long_str, 80, file); } fclose(file); } if (choice == 2){ printf("Print the long string: \t"); scanf("%s", &long_str); } printf("Print short string: \t"); scanf("%s", &short_str); l_l = strlen(long_str); l_s = strlen(short_str); printf("Original Long String: "); for (int i =0;i<=l_l; i++){ printf("%c", long_str[i]); if(((int)long_str[i]) < 97){ long_str[i] = (cha...
Read more

BMP180 Code + Library to SD card

#include <Wire.h> #include <SD.h> #include "BMP180Lib.c" #define BMP180_ADDRESS 0x77 // I2C address of BMP180 // Read 1 byte from the BMP180 at 'address' // Add these to the top of your program const float p0 = 101325; // Pressure at sea level (Pa) float altitude; const int CS_PIN =10; char bmp180Read(unsigned char address) {  unsigned char data;  Wire.beginTransmission(BMP180_ADDRESS);  Wire.write(address);  Wire.endTransmission();  Wire.requestFrom(BMP180_ADDRESS, 1);  while(!Wire.available())  ;  return Wire.read(); } // Read 2 bytes from the BMP180 // First byte will be from 'address' // Second byte will be from 'address'+1 int bmp180ReadInt(unsigned char address) {  unsigned char msb, lsb;  Wire.beginTransmission(BMP180_ADDRESS);  Wire.write(address);  Wire.endTransmission();  Wire.requestFrom(BMP180_ADDRESS, 2);  while(Wire.available()<2)  ;  msb = Wire....
Read more