10-04-2017, 08:01 PM
digital dice using 8051 microcontroller at89c51
It is a project that builds microcontroller programming interest in new student and hobbies. This project is a very simple one that can easily be built by new students. It uses 7 LEDs, 8051 microcontroller and an optional 5V power supply regulator part. It s algorithm is also very simple.
1) Initially microcontroller displays 1 on LEDs display just like in real dice.
2) Then in main while loop it waits for switch attached to pin 0 of port 1 to be pressed.
3) Until switch remains pressed it generates random number from 1 to 6 and displays it on LEDs.
4) When button is released it generates and display a new random number on LEDs.
5) It repeats from step 2 to step 5 until power is applied to the system.
For further information of components and basic 8051 microcontroller circuit please visit
8051 Basic LED Flasher.
Code
// Start of code.
//
// Company : Micro Digital //
// Address : Office # C7 Raza Plaza //
// DAV College Road //
// Rawalpindi, //
// Pakistan. //
// Programmed By : Rashid Mehmood //
// Project Name : Electronic Dice using 8051 //
// Crystal : 24.000000 MHz //
// Microcontroller : AT89C2051-C51-C52-C55-S2051-S51-S52 //
//
// Header file for AT89x051 microcontrollers regiter definitions.
#include <AT89x051.h>
// Header file for random number generation functions.
#include <stdlib.h>
sbit Led1 = P1^1;
sbit Led2 = P1^2;
sbit Led3 = P1^3;
sbit Led4 = P1^4;
sbit Led5 = P1^5;
sbit Led6 = P1^6;
sbit Led7 = P1^7;
// This function halts execution for
// specified milliseconds.
void delay_ms(unsigned int del)
{
unsigned int i,j;
for(i = 0; i < del; i ++)
for(j = 0; j < 1275; j ++);
}
// Rename or define P1.0 as Switch.
sbit Switch = P1^0;
// This function displays an integer value from
// 0 to 6 on LEDs.
void Display(char Value)
{
// Switch off all LEDs.
Led1 = Led2 = Led3 = Led4 = Led5 = Led6 = Led7 = 1;
switch(Value)
{
case 1:
Led4 = 0;
break;
case 2:
Led1 = Led7 = 0;
break;
case 3:
Led1 = Led4 = Led7 = 0;
break;
case 4:
Led1 = Led3 = Led5 = Led7 = 0;
break;
case 5:
Led1 = Led3 = Led4 = Led5 = Led7 = 0;
break;
case 6:
Led1 = Led2 = Led3 = Led5 = Led6 = Led7 = 0;
break;
}
}
// Define macro or formulae for random number
// generation from 1 to 6.
#define GetRandomNumber() ((rand() % 6) + 1)
void main()
{
char RandomNumber;
Switch = 1;
Display(1);
srand(50);
while(1)
{
// Wait until switch is pressed.
while(Switch);
// Until switch is released.
while(!Switch)
{
// Generate random number.
RandomNumber = GetRandomNumber();
// Display this number on LEDs.
Display(RandomNumber);
// Give some delay.
delay_ms(10);
}
// Generate random number last time.
RandomNumber = GetRandomNumber();
// Finally display this number on LEDs.
Display(RandomNumber);
}
}
// End of code.