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16f628a dimmer, simple problem

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Grimmjow

Joined: 15 Apr 2009
Posts: 10

16f628a dimmer, simple problem

Posted: Tue Jul 28, 2009 10:51 am

Hi there!!

Here is the code:

Code:

#include <16f628a.h>
#fuses INTRC_IO,NOPUT,NOWDT,NOPROTECT,NOLVP,NOBROWNOUT,NOMCLR
#use delay (clock=4M)

void main(){

int inc = 0;
int counter = 0;

setup_ccp1(CCP_PWM); // CCP1 set as PWM
setup_timer_2(T2_DIV_BY_16,32,1); // timer2 set at 2 kHz
set_pwm1_duty(inc);

while(TRUE){

if(input(PIN_A0)){

while(input(PIN_A0)){
}

if(counter<4){
inc = inc + 8;
counter++;
}

}

if(input(PIN_A1)){

while(input(PIN_A1) && inc>0){
}

if(counter>0){
inc = inc - 8;
counter--;
}
}

set_pwm1_duty(inc);
}

}

Code does the following:

- When a button that is connected to PIN_A0 is pushed, LED is turned on with a duty cycle of 25%.

- Similarly, when a button that is connected to PIN_A1 is pushed, LED is dimmed with a duty cycle of 25%.

Code works but veeerrrryyyy slow Evil or Very Mad

LED responds approximately after 15 seconds each time a button is pushed.

I don't think the root of the problem is hardware.

Thanks in advance...

PCM programmer

Joined: 06 Sep 2003
Posts: 21708


Posted: Tue Jul 28, 2009 10:56 am

Try using some better button code that has debouncing: http://www.ccsinfo.com/forum/viewtopic.php?t=23837

Grimmjow

Joined: 15 Apr 2009
Posts: 10

Posted: Wed Jul 29, 2009 5:03 am

Quote:

I don't think the root of the problem is hardware.

I said that however this was not true... Embarassed

I had connected the pull-up resistor to the wrong side of the button. So, code was correct and is working now...

Thanks for the quick reply though...

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