STOPWATCH WITH LAPTIMES VIDEO

Produced by Hanif Razali and Nasrul Fadli.
Directed by Sir Zulkhairi.

                  Link Video Youtube

Coding In Simplicity Studio Software

//-----------------------------------------------------------------------------

// Includes

//-----------------------------------------------------------------------------

#include <SI_C8051F850_Register_Enums.h>

#include "InitDevice.h"

#include "stdio.h"

//-----------------------------------------------------------------------------

// Function PROTOTYPES

//-----------------------------------------------------------------------------

sbit SW0 = P2^1;

const unsigned int str[10];

int milisec,sec,minute;

char flag=0;

//-----------------------------------------------------------------------------

//------------lcd header----------------------------------------

sbit EN = P0^0;

sbit RW = P0^1;

sbit RS = P0^2;

#define DATA P0

void EN2HIGH(void);

void EN2LOW(void);

//void init_usart(void);

void Delay_MS(unsigned int x);

unsigned char check_busy(void);      //function declaration'

char read_data(void);

void send_control(char x);

void send_data(char x);

void Initialize_LCD(void);

void puts_lcd(char *pointer);

void puts_lcd(char *pointer){

     while(*pointer)     // print till null encountered

send_data(*pointer++);

}

void Delay_MS(unsigned int x){

unsigned int i, j;

for(i=0; i<x; i++){

for(j=0; j<20; j++);  //adjust delay faster

 }

}

unsigned char check_busy(void){

  RS = 0; // Logic ‘0’

  RW = 1; // Logic ‘1’

DATA|=0xf0;   // Set data line as input

  Delay_MS(1);

EN2HIGH();

if(DATA&0x80){

EN2LOW();

EN2HIGH();

EN2LOW();

DATA&=0x0f;   // Set data line as output

return 1;

}

else{

EN2LOW();

EN2HIGH();

EN2LOW();;

DATA&=0x0f;   // Set data line as output

return 0;

}

}

char read_data(void){

  char x;

  while(check_busy());

DATA|=0xf0;   // Set data line as input

  RS = 1; // Logic ‘1’

  RW = 1; // Logic ‘1’

  Delay_MS(1);

EN2HIGH();

x = DATA;

EN2LOW();

EN2HIGH();

x |= DATA>>4;

EN2LOW();

DATA&=0x0f;   // Set data line as output

return x;

}

void send_control(char x){

  while(check_busy());

DATA&=0x0f;   // Set data line as output

  RS = 0; // Logic ‘0’

  RW = 0; // Logic ‘0’

DATA&=0x0f;   // clear previous data

DATA |= x&0xf0;

  Delay_MS(1);

EN2HIGH();

EN2LOW();

DATA&=0x0f;   // clear previous data

DATA |= x<<4;

Delay_MS(1);

EN2HIGH();

EN2LOW();

}

void send_data(char x){

while(check_busy());

DATA&=0x0f;   // Set data line as output

  RS = 1; // Logic ‘0’

  RW = 0; // Logic ‘0’

DATA&=0x0f;   // clear previous data

DATA |= x&0xf0;

  Delay_MS(1);

EN2HIGH();

EN2LOW();

DATA&=0x0f;   // clear previous data

DATA |= x<<4;

Delay_MS(1);

EN2HIGH();

EN2LOW();

}

void Initialize_LCD(void){

DATA = 0x00; // Set data line as output

Delay_MS(20);     // 20ms @ 16MHz

send_control(0x33);

send_control(0x33);

send_control(0x32);

send_control(0x28); // 4 bit mode

send_control(0x10); // clear the screen

send_control(0x06);

send_control(0x0C);

send_control(0x01); // display on cursor on

send_control(0x06); // increment cursor

send_control(0x80); // row 1 column 1

}

void EN2HIGH(void){

EN=1;

  Delay_MS(1);

}

void EN2LOW(void){

EN=0;

Delay_MS(1);

}

//--------------------------delay---------------------------------

void delay_10us(unsigned int x){

unsigned int i;

for(i=0; i<x; i++);

 }

void delay_0dot1ms(unsigned int x){

unsigned int i, j;

for(i=0; i<x; i++){

 for(j=0; j<11; j++);

   }

 }

void delay_1ms(unsigned int x){

unsigned int i, j;

for(i=0; i<x; i++){

 for(j=0; j<1111; j++);

   }

 }

// MAIN Routine

//-----------------------------------------------------------------------------

void main (void){

   //Sysclk - 24.5Mhz/8 Timer2 overflow set to 1

   enter_DefaultMode_from_RESET();

   Initialize_LCD();

   send_control(0x80);

   puts_lcd("NASRUL HANIF");

   send_control(0xC0);

puts_lcd("STOP WATCH TIMER");

   while(SW0);

   delay_1ms(10);

send_control(0x01);

    delay_1ms(100);

while(1){

milisec++;

delay_1ms(50);

if (milisec>=10){

milisec=0;

sec++;

if (sec>=60){

sec=0;

minute++;

}

}

send_control(0x80);

sprintf(str,"    %d:%d:%d   ",minute,sec,milisec);

puts_lcd(str);

if (!SW0 && flag==0){

delay_1ms(100);

send_control(0xC0);

sprintf(str,"LAP1:    %d:%d:%d   ",minute,sec,milisec);

puts_lcd(str);

flag=1;

}

if (!SW0&&flag==1){

delay_1ms(100);

send_control(0x80);

sprintf(str,"LAP2:    %d:%d:%d   ",minute,sec,milisec);

puts_lcd(str);

milisec=sec=minute=0;

IE_EA = 0; //stop timer

while(SW0);

delay_1ms(100);   //debouncing

milisec=sec=minute=0;

flag=0;

send_control(0x01);

puts_lcd("");

IE_EA =1;  //start timer

}

}

}

//-----------------------------------------------------------------------------

// End Of File

//-----------------------------------------------------------------------------