Hands-On Robotics Programming with C++

The LCD program

After connecting the LCD to the Raspberry Pi, let's examine the program for printing the value on the LCD, as follows:

#include <wiringPi.h> #include <lcd.h> #define RS 22 //Register Select#define E 26 //Enable#define D4 24 //Data pin 4#define D5 25 //Data pin 5#define D6 27 //Data pin 6#define D7 28 //Data pin 7int main(){int fd; wiringPiSetup(); fd= lcdInit (2, 16, 4, RS, E, D4, D5, D6, D7, 0, 0, 0, 0); lcdPuts(fd, "LCD OUTPUT"); }

The following is the details of the preceding program:

1. First, we call the LCD.h library. The LCD.h library consists of all the important functions that we can use to print, position, and move text, as well as clear the LCD screen.
2. Next, we define pin numbers RS, E, D4, D5, D6, and D7.

3. After ...