Question

arduino programing

Question 1: write an APL program that will print the following output on the serial monitor 10 times only.  

Output:  1

2

3

4

5

Question 2: write an APL program that will turn the traffic lights on and off by taking input from the Serial port working at 11500 bits processing rate. Use r or R for RED LIGHTS, y or Y for YELLOW LIGHTS and g or G for GREEN LIGHTS.   

Question 3: write an APL program that will control two DC motors at 75 % PWM using ADA FRUIT STEPPER MOTOR SHIELD. Your program must let user to send the direction in which the motor rotates. F or F for FORWARD, b or B for BACKWARDS, r or R for RIGHT, l or L for LEFT, and s or S for STOP.

Answer 1

here i am writing in arduino code after // this i will explain about that line

Question no.1:

void setup() {
Serial.begin(9600);      //for this line arduino will start communication with serail monitor at 9600 processing rate
}

void loop() {                            // it is also known as main function
for(int i=0; i<10; i++)                // this for loop will run 10 times means it will print content 10 times on the serial monitor
{
    for(int j=1; j<=5; j++)             // this loop will run 5 times and will start with 1 and print 1 and each and every loop it will increment by 1
    {
      Serial.println(j);                // it will print value of j with new line
    }
}
}

Question no.2

#include<SoftwareSerial.h>            //need to add library file of serial port
SoftwareSerial mySerial(2, 3);    // declaring serial port under the barracket declare the rx pin and tx pin of arduino
char val;    // declaring the varibale which store the value coming from serial port
int redled = 7;     // declaring pin for lights
int yellowled = 8;
int greenled = 9;
void setup() {                      // Setup function
mySerial.begin(11500);         // setting the data rate for the serial port to communicate at this rate
pinMode(redled, OUTPUT);        //pimode for the lights
pinMode(yellowled, OUTPUT);
pinMode(greenled, OUTPUT);
void off();                       // calling off function for initially all lights will off when program will start
}
void off()
{
digitalWrite(redled,LOW);              // creating off function
digitalWrite(yellowled,LOW);
digitalWrite(greenled,LOW);
}
void loop() {             // main function
if(mySerial.available())               //it will checks for communication means data is coming or not
{
    val=mySerial.read();              // if coming then store the data in val variable
}
switch(val)                        // switch case is the best control structure to control component according to serail port data
{
    case 'r':                          // if val == r
        void off();                     // then calling off function if any light is on then it will off then
        digitalWrite(redled,HIGH);      // only red light will on
        break;
    case 'R':                         // if data will come in capital letter
     void off();
     digitalWrite(redled,HIGH);
     break;
     case 'y':                           // similarly it is for all the lights
      void off();
      digitalWrite(yellowled,HIGH);
      break;
      case 'Y':
       void off();
      digitalWrite(yellowled,HIGH);
      break;
      case 'g':
       void off();
      digitalWrite(greenled,HIGH);
      break;
      case 'G':
       void off();
      digitalWrite(greenled,HIGH);
      break;
      default:                      // if nothing data are come or another else data will come then it call off function
      void off();
      break;
}

}

Question no.3:

#include<SoftwareSerial.h>       // library file for communication between ports
SoftwareSerial mySerial(2,3);   //declartion of serail port with rx and tx pin
const int IN1=7;          // motor 1 of 2 pin
const int IN2=6;         //motor 1 of 2 pin
const int IN3=5;        // motor 2 of 1 pin
const int IN4=4;       // motor 2 of 2 pin
const int EN1=8;      // sheild enable pin
const int EN2=9;     // sheild enable pin
char val;           // declaring the varibale which store the value coming from serial port
void setup() {
mySerial.begin(9600);             // start communication with serial port
pinMode(IN1,OUTPUT);             // pinmode of all motor and enable pin
pinMode(IN2,OUTPUT);
pinMode(IN3,OUTPUT);
pinMode(IN4,OUTPUT);
pinMode(EN1,OUTPUT);
pinMode(EN2,OUTPUT);
void stop();

}
void loop() {
analogWrite(EN1,192);           // here we are controlling speed of motor see when we use 100 % of pwm then we have to give 255 value so here are using 75% of pwm then 255 of 75% is around 192
analogWrite(EN2,192);
if(mySerial.available())               //it will checks for communication means data is coming or not
{
    val=mySerial.read();              // if coming then store the data in val variable
}
switch(val)       // switch case is the best control structure to control component according to serail port data
{
    case 'f':            // when serial read f then it call forward function
    void forward();
    break;
    case 'F':         // also when serial read F then it call forward function
    void forward();
    break;
    case 'b':               // similarly when b or B read then it call backward function
    void backward();
    break;
    case 'B':
    void backward();
    break;
    case 'r':          // similarly when r and R read then it call right function
    void right();
    break;
    case 'R':
    void right();
    break;
    case 'l':            //similalrly when l and L read then it call left function
    void left();
    break;
    case 'L':
    void left();
    break;
    case 's':          // and when s and S read then it call stop function
    void stop();
    break;
    case 'S':
    void stop();
    break;
}

}
void forward()            //creating forward function it will run the motor in forward direction
{
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
}
void backward()            //creating backward function it will run the motor in backward direction
{
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
}
void left()                     //creating left function it will run the motor in left direction
{
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
}
void right()                    //creating right function it will run the motor in right direction
{
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
}
void stop()
{
digitalWrite(IN1,LOW);
digitalWrite(IN2,LOW);
digitalWrite(IN3,LOW);
digitalWrite(IN4,LOW);
}