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Help me to finish the program;timer-mikroc-pic

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mailus

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Now I am doing a mini project to learn pic mcu through MIKROC.
so i am a beginner....

my project details
*adjustable timer to control a device.
*pic16f88
*using timer0




my doubt in a program..

I get inputs from user and calculate the interrupt routine value.

from the input i enter the value in character array ( char msg7[]="00"; )

now i want to calculate the interrupt routine value so i want to multiply the user input with 18 (msg7 * 18)
how to perform this multiplication operation using character array....
 

That will automatically happen; you multiply char will produce integer.
you can find more details on help of microC implicit conversion.
Hope this helps you.
 
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    mailus

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thank you... can you explain more about this with example

- - - Updated - - -

i converted the char into integer by using atoi command.... my problem solved.....
 

HI to all,

from your guidance I finish that timer using timer0. now i post the MICROC code and simulation file....please suggest some modification....what am wrong in that code....how to write a code in professional way....

I have doubt in the program while simulating the code initially LCD starts flickering how to avoid this?

Code: 
// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;

sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections

//tact switch and relay ports
sbit ten at ra0_bit;
#define sten 0
sbit unit at ra1_bit;
#define sunit 1
sbit ss_select at ra2_bit;
#define s_ss_select 2

#define port porta
#define delay 20

sbit on_delay at ra3_bit;
sbit off_delay at ra4_bit;
sbit buzz at Rb6_bit;
sbit indication at rb7_bit;
//end of relay and switch connections

//message display
char msg1[]="ELECTRONIC TIMER";
char msg2[]="BY MAILUS";
char msg3[]="SET TIME=   MIN";
char msg4[]="TIMER RUNNING";
char msg5[]="OUTPUT ON";
char msg6[]="OUTPUT OFF!";
char msg7[]="00";
//END OF MESSAGE

//variable declaration
short int t,u,si;
bit io,k;
int cal,i,jj;
//end of variable declaration

//define intial state
void initial_state()
{
 k=0;
 lcd_cmd(_lcd_clear);
 lcd_out(1,2,msg3);
 lcd_out(2,1,msg6);
 on_delay=0;
 off_delay=1;
 buzz=0;
 indication=0;
 }
 //end of initial state


 //read input
void readinput()
  {
   if(si==0)
   {
    if(button(&port,sten,delay,1))
    {
     t++;
     if(t==10) t=0;
    }while(ten=~ten);
    if(button(&port,sunit,delay,1))
    {
     u++;
     if(u==10) u=0;
    }while(unit=~unit);
   }
   if(button(&port,s_ss_select,delay,1))
   {
    si=~si;
    }while(ss_select=~ss_select);
  }
 //end of read input




//timer function through interrupt

void interrupt()
 {
  i++;
  if(i==cal)
  {
   io=~io;
   i=0;
  }
   intcon.tmr0if=0;
   tmr0=39;
  }
 //end of timer function


// display function
 void display()
 {
  msg7[0]=t+48;
  msg7[1]=u+48;
  if(k!=1)
  {
  lcd_out(1,11,msg7);
  }
}
 
//end of display
 


 void output()
 {

 lcd_out(2,1,msg5);
 io=0;
 k=~k;
 on_delay=1;
 off_delay=0;
 DELAY_MS(1000);
 }

void main()
{
 trisa=0x07;
 trisb=0x00;
 porta=0x10;
 portb=0x00;
 ansel=0x00;
 cmcon=0x07;
 tmr0=39;
 i,u,si,io,cal,jj,k=0;
 option_reg=0x07;
 intcon=0x80;
 lcd_init();
 lcd_cmd(_lcd_clear);
 lcd_cmd(_lcd_cursor_off);
 lcd_out(1,1,msg1);
 lcd_out(2,1,msg2);
 delay_ms(1000);
 lcd_cmd(_lcd_clear);
 do
 {
  void initial_state();
  readinput();
  display();
  delay_ms(50);
  if(si)
  {
   jj = atoi(msg7);
   cal= (jj * 1080);
   if(jj!=0&&k==0)
   {
    intcon.tmr0ie=1;
    lcd_out(2,1,msg4);
    if(io)
    {
    lcd_cmd(_lcd_clear);
     output();
    }
    }
   } 
   else 
   {
    intcon.tmr0ie=0;
    i=0;
    initial_state();
   }
 }while(1);
  }



CODE and DSN file attached here..........

waiting for your valuable reply.........
 

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  • timer to EDA.rar
    16.9 KB · Views: 83

Hi,
Add comments to your code;(like what does it do, meaning of variables & parameters, when to alter the code....) that will make easy to understand your code. Also it will help you in debugging.
I guess, your initial LCD message flicker since it's being written on LCD repeatedly by the main loop. You can check it by step-by-step running in proteus-ISIS simulation.
Hope this would help you.
 

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