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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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 Posted: Mon Nov 16, 2009 1:17 pm |
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Here is a demo program that will toggle an LED on/off when a
push-button is pressed.
| Code: |
#include <16F877.H>
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock = 4000000)
#use rs232(baud = 9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
// A push-button switch must be connected to the following
// pin on the PIC. The switch must connect the pin to
// ground when it's pressed. The PIC pin must have a
// pull-up resistor on it (Example: 10K).
#define BUTTON_PIN PIN_A4
// This pin must have an LED with a series resistor connected
// to it. (Example: 470 ohms). The cathode of the LED should
// connect to ground.
#define LED_PIN PIN_B1
void wait_for_button(void);
//====================================
void main()
{
output_low(LED_PIN);
while(1)
{
wait_for_button();
output_toggle(LED_PIN);
}
}
//==================================
void wait_for_button(void)
{
char count;
// Wait for the button to be released.
// The button must be in the "up" state for two
// consecutive samples, at 10 ms intervals.
count = 0;
while(1)
{
if(input(BUTTON_PIN))
count++;
else
count = 0;
if(count == 2)
break;
delay_ms(10);
}
// Now that the button is up, wait until the
// user presses it. For the keypress to be
// considered valid, the button must be held
// down for two consecutive samples, taken at
// 10 ms intervals.
count = 0;
while(1)
{
if(input(BUTTON_PIN) == 0)
count++;
else
count = 0;
if(count == 2)
break;
delay_ms(10);
}
} |
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newbie1000
Guest
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| Posted: Tue Nov 17, 2009 8:11 am |
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| THANK YOU A MILLION............I REALLY APPRECIATE IT!!!!!!!! |
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entah
Joined: 23 Sep 2010
Posts: 7
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| Posted: Sun Oct 03, 2010 7:45 am |
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how to add the switch...plzzzz... help!!!!
_________________
helpme!! Im the blind IT person!! |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19506
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| Posted: Sun Oct 03, 2010 10:15 am |
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Read the comments in the code, on lines 7 to 10. Tells you how to connect the switch....
Best Wishes |
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serabut
Joined: 03 Oct 2010
Posts: 1
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| Posted: Mon Oct 04, 2010 3:44 am |
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tq for comment.....but i means if want add some switch and led in program this not at board...
so how....can ur explain to me??coz i already try but has error at
void main()..  |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Oct 04, 2010 2:04 pm |
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Does serabut = entah ?
Please don't use two different identities on the same thread.
If you are a different person, please don't "hijack" someone else's thread. |
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entah
Joined: 23 Sep 2010
Posts: 7
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| Posted: Thu Oct 07, 2010 4:42 am |
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no same person la....but same team.....we have project for last sem lorrr......we student lorrrr....we dont know about this program so just ask k....dont treat we like you pcm....ur pro about this but we new....aiyoooo.....!!!so help lorrr....
_________________
helpme!! Im the blind IT person!! |
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