How to write a C program to make blinking LED with 1 sec delay?

[ryusgnal]

How to write C program to make LED blinking with 1 sec delay.

 

[crowinu]

Re: Blinking LED

How to write C program to make LED blinking with 1 sec delay.

what you mean by 1 second delay, the delay between on and off state??

 

[Tricky Dicky]

Re: Blinking LED

Put time loop from this:
[ **broken link removed** ]
into this:

int main(void) {
    while(1) {
        led_on();
        for(int i = 0; i < 0xffff; i++);
        led_off();
        for(int i = 0; i < 0xffff; i++);
    }
    return 0;
}

[ **broken link removed** ]

 

[sn_burki]

Re: Blinking LED

hi
why dont you use delay calculator for it, if you need I will upload it.

regards

 

[ryusgnal]

Re: Blinking LED

How to write C program to make LED blinking with 1 sec delay.

what you mean by 1 second delay, the delay between on and off state??

Yes. Can you help?

Added after 3 minutes:

Put time loop from this:
[ **broken link removed** ]
into this:

int main(void) {
    while(1) {
        led_on();
        for(int i = 0; i < 0xffff; i++);
        led_off();
        for(int i = 0; i < 0xffff; i++);
    }
    return 0;
}

[ **broken link removed** ]

Where should I connect the LED if I want to build the hardware with this code.

 

[firmware]

Re: Blinking LED

#include <reg51.h>

void timer0_init( void );

/******************************************************************************/
/*                                     Define area                                          */
/******************************************************************************/
#define  	time_high 0xFB                                      //Change time here
#define  	time_low  0xB4                                      //Change time here

sbit 	Pulse  = P1^ 0;

/******************************************************************************/
/*                               main routine area                                 */
/******************************************************************************/
void main( void ) {

      Pulse = 0;                                  
	
      timer0_init ();			// Init timer0
      while(1) {                                     // Repeat at here
      }
}
/******************************************************************************/
/*                          timer0 interrupt routine area                             */
/******************************************************************************/
void int_timer0(void) interrupt 1 {
	TF0 = 0;
	TR0 = 0;

	Pulse = ~Pulse;

	TH0 = time_high;
	TL0 = time_low;
	TR0 = 1;
}
/******************************************************************************/
/*                                Init function  area                                      */
/******************************************************************************/
void timer0_init( void ) {
	TMOD &= 0xF0;
	TMOD |= 0x10;
	TH0 = time_high;
	TL0 = time_low;
	ET0 = 1;
	EA = 1;
	TR0 = 1;
}

The best way by using interrupt timer to do it. Try at this code by adjust the time_high and time_low define value.

 

[ryusgnal]

Re: Blinking LED

I am using PIC16F877A........ Please help me.

 

[firmware]

Blinking LED

Try to use interrupt timer interval, then you can put a blinking of LED inside a interrupt service routine.

 

[iggyboy]

Re: Blinking LED

You will need CCS compiler for my code.

 

[progart]

Blinking LED

;Copy this codes and assemble
;///Program starts here///
; Connect your led to Portb,0

list p=16f877A
#include <p16F877A.inc>

bsf STATUS,RP0
clrf TRISB ; all TRISB pins OUTPUT
bcf STATUS,RP0

main
bsf PORTB,0 ; Led connected PB0
call Wait1_sec
bcf PORTB,0
call Wait1_sec
goto main

call Wait1_sec

cblock
d0
d1
d2
endc
Wait1_sec ;!!! 1sec for 4mhz XTAL !!!!
movlw 0x08 ; You OSC is not indefinite , i'm sorry
movwf d0 ; please tell me
movlw 0x2F
movwf d1
movlw 0x03
movwf d2
Delay_0
decfsz d0, f
goto $+2
decfsz d1, f
goto $+2
decfsz d2, f
goto Delay_0

goto $+1
return

end
;//// THE END ////
;This way is very strong, keep your hair on CSS ....