Chapter 9.5 - Making PC Controlled Serial Robot using 8051 Microcontroller on Breadboard - Source Code

We literary know that a lot of guys will come up with their suggestions that the code we provided could be optimized a lot and it is too lengthy and other things. But people you need to understand that this blog is for beginners, people who don't have the idea of these things. So, here we are providing you a detailed code of the Making PC Controlled Serial Robot using 8051 Microcontroller on Breadboard. We have commented most of the lines to help you understand it more specifically.

	//*******************************************************************
	//www.go8051.com
	//Chapter 9
	//Making PC Controlled Serial Robot using 8051 Microcontroller on Breadboard
	//Created By go8051.com
	// Open source
	//email : 8051blog@gmail.com
	//*******************************************************************

	#include<reg51.h> // Header file for 8051 microcontroller

	sbit IN1=P3^7; // Defining Port 3.7 as Input1 for motor
	sbit IN2=P3^6; // Defining Port 3.6 as Input2 for motor
	sbit IN3=P3^5; // Defining Port 3.5 as Input3 for motor
	sbit IN4=P3^4; // Defining Port 3.4 as Input4 for motor
	unsigned char rx();
	void main() // Start of main function
	{
	IN1=0; // Declare IN1 pin as Output pin
	IN2=0; // Declare IN2 pin as Output pin
	IN3=0; // Declare IN3 pin as Output pin
	IN4=0; // Declare IN4 pin as Output pin

	TMOD=0x20; // selecting Timer 1, with mode 8bit auto reload.
	TH1=0xFD; // setting baud rate = 9600
	SCON=0x50; // setting the 8bit Control reg which control the SBUF with RC5
	TR1=1; // starting the timer

	while(1) // Infinite while loop
	{
	if(rx()=='f') // if the character received is 'f' then move robot forward
	{
	IN1=1; // Set IN1 as 1
	IN2=0; // Set IN2 as 0
	IN3=1; // Set IN3 as 1
	IN4=0; // Set IN4 as 0
	}
	else if(rx()=='l') // if the character received is 'l' then move robot left
	{
	IN1=0; // Set IN1 as 0
	IN2=1; // Set IN2 as 1
	IN3=1; // Set IN3 as 1
	IN4=0; // Set IN4 as 0
	}
	else if(rx()=='r') // if the character received is 'r' then move robot right
	{
	IN1=1; // Set IN1 as 1
	IN2=0; // Set IN2 as 0
	IN3=0; // Set IN3 as 0
	IN4=1; // Set IN4 as 1
	}
	else if(rx()=='b') // if the character received is 'b' then move robot backward
	{
	IN1=0; // Set IN1 as 0
	IN2=1; // Set IN2 as 1
	IN3=0; // Set IN3 as 0
	IN4=1; // Set IN4 as 1
	}
	else // if any other character received then stop the robot
	{
	IN1=0; // Set IN1 as 0
	IN2=0; // Set IN2 as 0
	IN3=0; // Set IN3 as 0
	IN4=0; // Set IN4 as 0
	}
	}
	}

	// function to receive the serial data coming from rx pin
	unsigned char rx()
	{
	unsigned char val; // defining a variable to store the incoming character
	while(RI==0); // while receive interrupt is 0 loop in this line
	val=SBUF; // when receive interrupt gets 1 store the incoming value from sbuf register to val variable
	RI=0; // set the receive interrupt again to zero to reset and again detect new incoming character
	return(val); // return the data stored in val vairable in the main program
	}

view raw PC_Controllled_Robot_8051.c hosted with ❤ by GitHub

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