How to write a c language for ringing the buzzer for about 15 sec in infinite loop?

[Happy3]

As i said above,
#include<pic.h>

//===============configuration=================================
__CONFIG (0x3F32);

//===============define IO port================================
#define lcd PORTB
#define RS RA2
#define E RA5
#define CHANNEL0 0b10000001 // AN0
#define CHANNEL1 0b10001001 // AN1
#define buzzer RD0
#define fan RD1
#define led RD2

//==============FUNCTION PTOTOTYPE=========================
void e_pulse(void);
void delay(unsigned short i);
void send_char(unsigned char data);
void send_config(unsigned char data);
void lcd_goto(unsigned char data);
void lcd_clr(void);
void dis_num(unsigned long data);
void increment(unsigned long data);
void read_adc(void);
unsigned short read_temp(void);
void Off_Buzzer (void);

//====================MAIN================================
unsigned short result;
unsigned short temp,tempA;

void main(void)
{
ADRESH=0; //clear A/D result
ADRESL=0; //clear A/D result

//setting ADCON1 Register
ADCON1=0b11000101; // A/D result right justified,
// configure RA2 and RA5 as digital I/O

TRISA=0b11011011; //configure PORTA I/O direction
TRISB=0b00000000; //configure PORTB as output
TRISD=0b00000000; //configure PORTD as output

PORTA=0;
PORTB=0;


while(1)
{
send_config(0b00000001); //clear display at lcd
send_config(0b00000010); //Lcd Return to home
send_config(0b00000110); //entry mode-cursor increase 1
send_config(0b00001100); //diplay on, cursor off and cursor blink off
send_config(0b00111000); //function set

lcd_goto(0); //cursor start from beginning

//display character on LCD
send_char(' ');
send_char('T');
send_char('E');
send_char('M');
send_char('P');
send_char('.');
send_char('A');
send_char('=');

while(1) //infinity loop
{
//Temperature sensor
ADCON0=CHANNEL0; //CHANNEL0=0b10000001
lcd_goto(8);

read_adc();

temp=read_temp();
//tempA=temp*5/1024*100;
dis_num(temp/10);
send_char('.');
dis_num(temp%10);
send_char(0b11011111);
send_char('C');
send_char(' ');
send_char(' ');

tempA=temp;


if(tempA>300)
{
buzzer=1;
fan=1;
led=1;
delay(1000);
delay(1000);
delay(1000);
delay(1000);
delay(1000);
buzzer=0;
}

else if(tempA<250)
{
buzzer=1;
fan=0;
led=1;

}

else
{
buzzer=0;
fan=0;
led=0;
}


//Off_Buzzer();
}

}


}



//==================subroutine LCD setting ==========================

void send_config(unsigned char data)
{
RS=0;
lcd=data;
delay(500);
e_pulse();
}

void e_pulse(void)
{
E=1;
delay(500);
E=0;
delay(500);
}

void send_char(unsigned char data)
{
RS=1;
lcd=data;
delay(500);
e_pulse();
}


void lcd_goto(unsigned char data)
{
if(data<16)
{
send_config(0x80+data);
}
else
{
data=data-20;
send_config(0xc0+data);
}
}


void lcd_clr(void)
{
RS=0;
send_config(0x01);
delay(600);
}


void dis_num(unsigned long data)
{
unsigned char hundred_thousand;
unsigned char ten_thousand;
unsigned char thousand;
unsigned char hundred;
unsigned char tenth;

hundred_thousand = data/100000;
data = data % 100000;
ten_thousand = data/10000;
data = data % 10000;
thousand = data / 1000;
data = data % 1000;
hundred = data / 100;
data = data % 100;
tenth = data / 10;
data = data % 10;

if(hundred_thousand>0)
{
send_char(hundred_thousand + 0x30); //0x30 added to become ASCII code
send_char(ten_thousand + 0x30);
send_char(thousand + 0x30);
send_char(hundred + 0x30);
send_char(tenth + 0x30);
send_char(data + 0x30);
}

else if(ten_thousand>0)
{
send_char(ten_thousand + 0x30); //0x30 added to become ASCII code
send_char(thousand + 0x30);
send_char(hundred + 0x30);
send_char(tenth + 0x30);
send_char(data + 0x30);
}
else if(thousand>0)
{
send_char(thousand + 0x30); //0x30 added to become ASCII code
send_char(hundred + 0x30);
send_char(tenth + 0x30);
send_char(data + 0x30);
}
else if(hundred>0)
{
send_char(hundred + 0x30); //0x30 added to become ASCII code
send_char(tenth + 0x30);
send_char(data + 0x30);
}
else if(tenth>0)
{
send_char(tenth + 0x30); //0x30 added to become ASCII code
send_char(data + 0x30);
}
else send_char(data + 0x30); //0x30 added to become ASCII code
}

void increment(unsigned long data)
{
unsigned short j;
for(j=10;j>0;j--)
{ lcd_goto(32);
data=data+1;
dis_num(data);
delay(10000);
}

}

//==================subroutine ADC=========================

void read_adc(void)
{
unsigned short i;
unsigned long result_temp=0;
for(i=2000;i>0;i-=1) //looping 2000 times for getting average value
{
ADCON0bits.GO = 1;
//ADGO is the bit 2 of the ADCON0 register
while(ADCON0bits.GO==1);
//ADC start, ADGO=0 after finish ADC progress
result=ADRESH;
result=result<<8;
//shift to left for 8 bit
result=result|ADRESL;
//10 bit result from ADC
result_temp+=result;
}
result = result_temp/2000; //getting average value

}

unsigned short read_temp(void)
{
unsigned short temp;
temp=result;
return temp;

}

//==================subroutine DELAY==========================
void delay(unsigned short i)
{
for(;i>0;i--);
}

 

[Happy3]

im having some problem to the above coding, can anyone help me out ? thx in advance

 

[bee]

Put this tag # at the start and end of your code when you post it as it makes it easier to read 4th tag from the end in the reply panel ,, I cannot help you with the code, But itemize what you expect your code to do and when

Bernie

 

[Gayan Soyza]

In "infinity loop" comment all the statements upto tempA=temp;
Load tempA=310; & see how it works.

 

[Ian Rogers]

How come this C code is exactly the same as sahu's and ah_loon's... is someone posting some wrong code? or is this a project thing.

 

[Happy3]

Rogers: dis is a project. And the code i got it from cytron ...