day 14 lab

//LCD with I2C
#include <Wire.h>
//Include the library code:
#include <LiquidCrystal.h>
//Initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
int temp_address = 72; //1001000 written as decimal number
void setup() {
 // initialize serial communication at 9600 bits per second:
 Serial.begin(9600);
 //Set up the LCDs number of columns and rows:
 lcd.begin(16, 2);
  //Create a Wire object
 Wire.begin();
}
void loop() {
   //Start talking to the device at the specified address
 Wire.beginTransmission(temp_address);
 //Send a bit asking for register zero, the data register
 Wire.write(0);
 //Complete Transmission
 Wire.endTransmission();
 //Read the temperature from the device
 //Request 1 Byte from the specified address
 Wire.requestFrom(temp_address, 1);
 //Wait for response
 while(Wire.available() == 0);
 //Get the temp and read it into a variable
 int c = Wire.read();
 c = map(c, 22, 32, 22, 32);
 c = constrain(c, 22, 32);
 int buttonval = analogRead(A0);// let buttons read as variable
 int f = round(c*9.0/5.0 +32.0);//convert to farenheit
 // read the input on analog pin 0:
Serial.println(buttonval);
delay(1);
 Serial.println(c);
 delay(500); // delay in between reads
  Serial.println(f);
 delay(500); // delay in between reads
if ( buttonval == 481)
{
  switch(c){
  case 23:{
    lcd.setCursor(0,1);
    lcd.print("23C");
    break;
  }
  case 24:{
  lcd.setCursor(0,1);
    lcd.print("24C");
    break;
}
case 25:{
  lcd.setCursor(0,1);
    lcd.print("25C ");
    break;
}
case 26:{
  lcd.setCursor(0,1);
    lcd.print("26C");
    break;
}
}
}
else if ( buttonval == 0){
  switch(f){
  case 73:{
    lcd.setCursor(0,1);
    lcd.print("73F  ");
    break;
  }
  case 75:{
  lcd.setCursor(0,1);
    lcd.print("75F  ");
    break;
}
case 77:{
  lcd.setCursor(0,1);
    lcd.print("77F  ");
    break;
}
case 79:{
  lcd.setCursor(0,1);
    lcd.print("79F  ");
    break;
}
}
}
return;
}

day 14 assignment

/* This program demonstrates the relationship between /
/* variables and addresses. */
#include <stdio.h>
int main(void)
{
/* Declare and initialize variables. */
int a=1, b=2;
/*Print the contents and addresses of a and b. */
printf("a = %d; address of a = %u \n",a,&a);
printf("b = %d; address of b = %u \n",b,&b);
/* Exit program.*/
return 0;

}

day 13 assignment

/*?????????????????????????????????????????????????????????????*/
/* This program determines the locations of peaks in an */
/* grid of elevation data. */
#include <stdio.h>
#define N 25
#define FILENAME "grid1.txt"
int main(void)
{
/* Declare variables. */
int nrows, ncols, i, j;
int numpeaks=0;
int numvalleys=0;
double elevation[N][N];
FILE *grid;
/* Read information from a data file. */
grid = fopen(FILENAME,"r");
if (grid == NULL)
printf("Error opening input file\n");
else
{
fscanf(grid,"%d %d",&nrows,&ncols);
for (i=0; i<=nrows-1; i++)
for (j=0; j<=ncols-1; j++)
fscanf(grid,"%lf",&elevation[i][j]);
/* Determine and print peak locations. */
printf("Top left point defined as row 0, column 0 \n");
for (i=1; i<=nrows-2; i++)
for (j=1; j<=ncols-2; j++)
if ((elevation[i-1][j]<elevation[i][j]) &&
(elevation[i+1][j]<elevation[i][j]) &&
(elevation[i][j-1]<elevation[i][j]) &&
(elevation[i][j+1]<elevation[i][j])){
numpeaks = numpeaks +1;
numvalleys =
printf("Peak at row: %d column: %d \n",i,j);
}
printf("peak count is %i \n", numpeaks);
fclose(grid); /* Close file. */
}
return 0; /* Exit program. */

}

day 13 lab

//Reads Temp from I2C temperature sensor and prints it on the serialport
//Include Wire I2C library
#include <Wire.h>
#include "pitches.h"
const int speaker=9;
int temp_address = 72; //1001000 written as decimal number
int notes[] = { NOTE_B0, NOTE_C1, NOTE_CS1, NOTE_D1, NOTE_DS1};
int value[] = { 22, 23, 24, 25, 26} ;
int d;
void setup()
{
 //Start serial communication at 9600 baud
Serial.begin(9600);
 //Create a Wire object
 Wire.begin();
}
void loop()
{
 //Send a request
 //Start talking to the device at the specified address
 Wire.beginTransmission(temp_address);
 //Send a bit asking for register zero, the data register
 Wire.write(0);
 //Complete Transmission
 Wire.endTransmission();
 //Read the temperature from the device
 //Request 1 Byte from the specified address
 Wire.requestFrom(temp_address, 1);
 //Wait for response
 while(Wire.available() == 0);
 //Get the temp and read it into a variable
 int c = Wire.read();
 c = map(c, 22, 32, 22, 32);
 c = constrain(c, 22, 32);
 //Do some math to convert the Celsius to Fahrenheit
 int f = round(c*9.0/5.0 +32.0);
 //Send the temperature in degrees C and F to the serial monitor
 Serial.println(c);
 //Serial.print("C ");
 //Serial.print(f);
 //Serial.println("F");
 delay(500);
 switch ( c )
 {
 case 26:
  {
    tone(speaker, NOTE_DS1);
    break;
  }
  case 25:
  {
    tone(speaker, NOTE_D1);
    break;
  }
  case 24:
 {
  tone(speaker, NOTE_CS1);
  break;
  }
  case 23:
  {
     tone(speaker, NOTE_C1);
     break;
  }
  case 22:
  {
    tone(speaker, NOTE_B0);
    break;
  }
 }
return;
}

day 12 lab

#include <Servo.h>
const int SERVO =9;
const int IR =0;
Servo myServo;
int pos = 0;    // variable to store the servo position
void setup()
{
  Serial.begin(9600);
  myServo.attach(SERVO); // attach the servo
}
void loop() {
  for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myServo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
  if (analogRead(IR) > 200)
  {
    delay(500);
  }
  }
  for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
    myServo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
   if (analogRead(IR) > 200)
  {
    delay(500);
  }
  }
}

day 11 lab

//Single Character Control of an LED
#include <Servo.h>
const int LED=4;
const int servo=9;
int data; //Holds incoming character
int pos = 0;
Servo myServo;
void setup()
{
 Serial.begin(9600); //Serial Port at 9600 baud
 myServo.attach(servo); // attach servo
 pinMode(LED, OUTPUT); // set led to output
}
void loop()
{
  Serial.print(data);
  delay(100);
 //Only act when data is available in the buffer
while (Serial.available() > 0)
 {
 data = Serial.parseInt(); //Read byte of data
 //Turn LED on
  if (data <= 180)
 {
 myServo.write(data);
 Serial.println(data);
 }
 //Turn on LED if over 180
 else if (data > 180)
 {
 digitalWrite(LED, HIGH);
 Serial.println(data);
 }
 }
}

day 11 assignment

day 10 assignment

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

int main(void)

{

/* Declare variables and function prototype. */

//unsigned int seed;

double interval_start, interval_end, k;

double rand_float(double interval_start,double interval_end);

/* Get seed value and interval limits. */

//printf("Enter a positive integer seed value: \n");

//scanf("%u",&seed);

srand(101);

printf("Enter integer limits a and b (a<b): \n");

scanf("%lf %lf",&interval_start,&interval_end);

/* Generate and print ten random numbers. */

printf("Random Numbers: \n");

for (k=1; k<=10; k++)

  printf("%lf \n",rand_float(interval_start,interval_end));

/* Exit program. */

return 0;

}

/* This function generates a random integer */

/* between specified limits a and b (a<b). */

double rand_float(double interval_start,double interval_end)

{

return (rand()%32767/32767.0)*(interval_end - interval_start + 1) + interval_start;

}