Thread: help

Code:

#include <REG51.H>


//Port pin definition
#define LCD_DATA_PORT P2


//LCD commands
#define FunctionSet 0x3B
#define DisplayOn 0x0E
#define EntryModeSet 0x06
#define ClearScreen 0x01
#define SecondLine 0xC0

//function prototypes
void lcd_data_write(unsigned char display_data)    ;
void lcd_command_write(unsigned char display_data);
void delay(unsigned char no_loops);
void delayX1msec(unsigned int no_loops);
void init_lcd();

//pin definitions
sbit EN = P3^5;
sbit RS = P3^4;
sbit RW = P3^6;
sbit buzzer = P1^2;

//function prototype
void delayX1msec(unsigned int no_loops);

//time variables
char seconds=24;
    bit run=0;
    

void main()
{
    init_lcd();
    
    //enable switch interrupts
    IT0=1;
    IT1=1;
    IE=0x85;
    while(1)
        {
                delayX1msec(1000);                //1 second delay
            
                if(seconds>0&&run==1)
                {        
                            seconds--;
                }
                
                
                
                lcd_command_write(ClearScreen);
                lcd_data_write(seconds/10 + 0x30);
                lcd_data_write(seconds%10 + 0x30);
                
                if(seconds=0;seconds<10;seconds++)
                {
                    buzzer=1;
                    delayX1msec(1000);
                    buzzer=0;
                }
                
                
                    
                

    }

}
void start_stop_isr() interrupt 2
    {
        run=~run;
    }
void reset_isr()interrupt 0
    {
        seconds=24;
        run=0;
    }

//**************************************************************************
//function to generate a delay of x * 1msec
//e.g. delay(50); generates a 50msec delay
//Assumes a 12MHz crystal oscillator
void delayX1msec(unsigned int no_loops)
{
    unsigned int x;
    TR0 = 0;
    TF0 = 0;
    TMOD = 0x01;
    TH0 = 0xFC;
    TL0 = 0x18;
    TR0 = 1;
    for(x=0;x<no_loops;x++)
    {
        while(!TF0);
        TF0 = 0;
        TH0 = 0xFC;
        TL0 = 0x18;
     }
    TR0 = 0;
}

//function to initialise the LCD display
void init_lcd()
{
    lcd_command_write(FunctionSet);
    lcd_command_write(DisplayOn);
    lcd_command_write(EntryModeSet);
    lcd_command_write(ClearScreen);
}
//**************************************************************************
// Function to write a display character to the LCD
void lcd_data_write(unsigned char display_data)
{
    RW = 0;
    RS = 1;
    EN = 1;
    LCD_DATA_PORT = display_data;
    EN = 0;
    delayX1msec(5);        //delay to allow write operation to complete
}
//**************************************************************************
// Function to write a command to the LCD
void lcd_command_write(unsigned char command)
{
    RW = 0;
    RS = 0;
    EN = 1;
    LCD_DATA_PORT = command;
    EN = 0;
    delayX1msec(5);        //delay to allow write operation to complete
}

i want to put a buzzer in so when my time goes to 0 the buzzer goes of for 2 seconds and then stops..i also want to enter a string to say swish when the time reaches 10 and a led will light up for 2 seconds.wil someone please help me...re-enter my code with the things i wwant done in it please..urgent..been stuck for ages