IR Remote Controlled Car Using a Protoshield

1/*
2    IR_remcon_car_L293D
3
4    A remote controlled 2 wheel car  that uses an L293D H-bridge,
5    2 3V-6V DC geared motors, an IR receiver and  a remote.
6
7    The circuit:
8    * IR Receiver pin 7
9    * L293D H-bridge  pins 10,9,4,5,2,3
10
11    Created 17 April 2022
12    By VideotronicMaker
13    https://videotronicmaker.com/
14    
15    based on the IR remote controlled  car sketch 
16    by Hosyond for the Hosyond Smart Car Kit
17
18*/
19
20#include  <IRremote.h>
21int RECV_PIN = 7;
22IRrecv irrecv(RECV_PIN);
23decode_results  results;         // use IRrecvDemo from IRremote library by Ken Shirriff to get  your remote codes
24#define REM_FW     0x00FF629D   // defining remote button forward
25#define  REM_RV     0x00FFA857   // defining remote button reverse
26#define REM_LF     0x00FF22DD   // defining remote button left
27#define REM_RT     0x00FFC23D   // defining  remote button right
28#define REM_STOP   0x00FF02FD   // defining remote button  stop
29const int LFT_EN=5;             // Left Enable and Motor speed value from  0-255 on pin 5
30const int RGT_EN=9;             // Right Enable and Motor speed  value from 0-255 on pin 9
31const int LEFT_MC1F=12;          // defining pin12  left reverse
32const int LEFT_MC2B=6;          // defining pin6 left forward
33const  int RIGHT_MC1F=2;         // defining pin2 right reverse
34const int RIGHT_MC2B=3;         // defining pin3 right forward
35byte LPWM_val = 225;            // set  speed of left motor using pwm (Set any value between 0-255)
36byte RPWM_val = 225;            // set speed of right motor using pwm (Set any value between 0-255)
37void  M_Control_IO_config(void)  // Motor Control IO Function
38{
39  pinMode(LEFT_MC1F,OUTPUT);    // declare pin 4 to be an OUTPUT
40  pinMode(LEFT_MC2B,OUTPUT);    // declare  pin 5 to be an OUTPUT
41  pinMode(RIGHT_MC1F,OUTPUT);   // declare pin 2 to be  an OUTPUT
42  pinMode(RIGHT_MC2B,OUTPUT);   // declare pin 3 to be an OUTPUT
43  pinMode(LFT_EN,OUTPUT);       // declare pin 10 (PWM/speed value) to be an OUTPUT
44  pinMode(RGT_EN,OUTPUT);       // declare pin 19 (PWM/speed value) to be an OUTPUT  
45}
46void Set_Speed(byte Left,byte Right)  //Function to set the speed.byte  refers to
47{                                     //the integer value set above  at LPWM_val and RPWN_val
48  analogWrite(LFT_EN,Left);           
49  analogWrite(RGT_EN,Right);
50}
51void  forward()                  // Function to move forward
52  {
53    digitalWrite(RIGHT_MC1F,LOW);
54    digitalWrite(RIGHT_MC2B,HIGH);
55    digitalWrite(LEFT_MC1F,LOW);
56    digitalWrite(LEFT_MC2B,HIGH);
57  }
58void turnRight()                // Function to turn right
59  {
60    digitalWrite(RIGHT_MC1F,LOW);
61    digitalWrite(RIGHT_MC2B,HIGH);
62    digitalWrite(LEFT_MC1F,HIGH);
63    digitalWrite(LEFT_MC2B,LOW);
64  }
65void turnLeft()                 // Function to turn left
66  {
67    digitalWrite(RIGHT_MC1F,HIGH);
68    digitalWrite(RIGHT_MC2B,LOW);
69    digitalWrite(LEFT_MC1F,LOW);
70    digitalWrite(LEFT_MC2B,HIGH);
71  }
72void stopp()                    // Function to stop 
73  {                             
74    digitalWrite(RIGHT_MC1F,HIGH);
75    digitalWrite(RIGHT_MC2B,HIGH);
76    digitalWrite(LEFT_MC1F,HIGH);
77    digitalWrite(LEFT_MC2B,HIGH);
78  }
79void reverse()                  // Function  to go in reverse
80  {
81    digitalWrite(RIGHT_MC1F,HIGH);
82    digitalWrite(RIGHT_MC2B,LOW);
83    digitalWrite(LEFT_MC1F,HIGH);
84    digitalWrite(LEFT_MC2B,LOW);
85  }
86void  IR_Control(void)
87{
88   unsigned long Key;
89   if(irrecv.decode(&results))  //check if serial port receives data   
90 {
91     Key = results.value;
92    switch(Key)
93    {
94      case REM_FW:forward();    //Up arrow button on remote
95      break;
96      case REM_RV:reverse();    //Down arrow button on remote
97      break;
98      case REM_LF:turnLeft();   //Left arrow button on remote
99      break;
100      case REM_RT:turnRight();  //Right arrow button on remote
101      break;
102      case REM_STOP:stopp();    //OK button on remote
103      break;
104      default:
105      break;
106    }
107    irrecv.resume();            //recieve the next value
108  }
109
110}
111void setup() 
112{
113  M_Control_IO_config();         // 
114  Set_Speed(LPWM_val,RPWM_val);
115  irrecv.enableIRIn();          //Enable the receiver
116  Serial.begin(9600);           //Initialize  the serial port, Bluetooth used as serial port, setting baud ratio at 9600 
117  stopp();
118}
119
120void loop() {
121  IR_Control();                 // Main  code to run repeatedly
122
123}