simple program for Blinking LED

[sahu]

Dear All
Plz guied me I need a simple program for LED1 to LED8.

task_1
when S1 unpressed ;

{LED=11111110;}
(HOLD IT for 2sec)

{LED=11111101;}
(HOLD IT for 2sec)

{LED=11111011;}
(HOLD IT for 2sec)

{LED=11110111;}
(HOLD IT for 2sec)


{LED=11101111;}
(HOLD IT for 2sec)
Repeat this function every time till S1 unpressed .

task_2
but when S1 pressed for 1time within 1sec

{LED=11111110;}
(HOLD IT for 20sec)
& ofter 20 sec exit form task_2 & Repeat this function task_1

but when S1 pressed for 2time within 1sec

{LED=11111101;}
(HOLD IT for 20sec)
& ofter 20 sec exit form task_2 & Repeat this function task_1


but when S1 pressed for 3time within 1sec

{LED=11111011;}
(HOLD IT for 20sec)
& ofter 20 sec exit form task_2 & Repeat this function task_1


but when S1 pressed for 4time within 1sec

{LED=11101111;}
(HOLD IT for 20sec)
& ofter 20 sec exit form task_2 & Repeat this function task_1

 

[Ian Rogers]

Nigel's tutorials have almost all you need..... If you need it in C.... well you know where my tutorials are..

 

[sahu]

Nigel's tutorials have almost all you need..... If you need it in C.... well you know where my tutorials are..

its ok sir ?

if(sw_pressed)
{
   count++;
  switch(count)
  {   case 1:   LED=11111110;
                  delay(20sec);
      break ;
    
      case 2:   LED=11111101;
                  delay(20sec);
      break ; 
      case 3:   LED=11111011;
                  delay(20sec);
      break ;
     case 4:   LED=11110111;
                  delay(20sec);
                  count=0;
      break ;
     
}
else
{
     {LED=11111110;}
delay(2sec);
{LED=11111101;}
delay(2sec);
{LED=11111011;}
delay(2sec);
{LED=11110111;}
delay(2sec);
{LED=11101111;}
delay(2sec);
}

 

[Ian Rogers]

Looks ok... Does it work?

Why are the last few LED statements in curly brackets???

 

[sahu]

Looks ok... Does it work?

Why are the last few LED statements in curly brackets???

yes sir it work fine with few changes .
but have some eshus.
when press sw mcu inter count mode & hold there till delay time .if agen i press sw during hold time mcu not goes next counter mode . it goes when delay time complete there .
whats wrong with me .

 

[sahu]

it have some some problem .
when press sw mcu inter count mode & hold there till delay time .if agen i press sw during hold time mcu not goes next counter mode . it goes when delay time complete there .
whats wrong with me .

// Global includes
#include <xc.h>
#include <delay.h>
__CONFIG(FOSC_INTRCIO & WDTE_OFF & PWRTE_OFF & MCLRE_OFF & CP_OFF & CPD_OFF);

#define LED PORTC

int count;
#define sw  RA0

#define _XTAL_FREQ   4000000 //Internal clock is 4MHz//
/* THE main source code Start here*/
void main(void)
{unsigned int count_flag = 0;
       
    CMCON=0x7;          // disable the comparator
    ANSEL=0x00;         // all pin are Digital
    TRISA=0b00001001;   //only RA3 & RA0 is input
    TRISC=0b00000000;   //
    PORTC=0b11111111;
    while (1) {  //loop forever
    if(sw==1)//(sw_pressed)
{count_flag=1;}
if(count_flag==1){
   count++;
  switch(count)
  {   case 1:   {LED=0b00000001;}
                   delay_ms(5000);
      break ;
  
      case 2:   {LED=0b00000010;}
                   delay_ms(5000);
      break ;
      case 3:   {LED=0b00000100;}
                   delay_ms(5000);
      break ;
     case 4:   {LED=0b00001000;}
                   delay_ms(5000);
      break ;
     case 5:   {LED=0b00010000;}
                   delay_ms(5000);
       break ;
     case 6:   {LED=0b00100000;}
                   delay_ms(5000);
                  count=0;
      break ;
        default :    
                    break;   
}
}
//else
if(sw==0)//(sw_unpressed)
{{count_flag=0;}
if(count_flag==0)
{LED=0b00000001;}
delay_ms(200);
{LED=0b00000010;}
delay_ms(200);
{LED=0b00000100;}
delay_ms(200);
{LED=0b00001000;}
delay_ms(200);
{LED=0b00010000;}
delay_ms(200);
{LED=0b00100000;}
delay_ms(200);
}  
}  
}
}

 

[be80be]

When you get in a delay all you do is count if you want to change when switch is pressed you need to have the switch read in a interrupt.

 

[sahu]

When you get in a delay all you do is count if you want to change when switch is pressed you need to have the switch read in a interrupt.

i has not understand interrupt fundamental .
so pl requested to u give me an example .pl

 

[Ian Rogers]

No need for interrupts.... If you break your delays up into manageable functions
lets say SW is your switch.... SWbuff is your buffer..

int DelayMs(int x)
   {
   while(x--)
     {
     if(SW != SWbuff)
         {
          SW = SWbuff;
         return 1;
         }
      __delay_us(800);
     }
     return 0;
   }

This way your switch condition will be monitored while in the delay ( well at least every mS ) you will need to tweak the us delay as I'm not sure of the "if" overhead...