Electronic Circuits and Projects Forum

Here food for thought any code in C can easily be changed to run on any pic as long as
1. they have the same pins with the same peripherals such as ADC usart etc.
2. the code will use the same amount of memory can't put 2k in a 1 k chip.

And last http://www.google.com/url?sa=t&rct=j...qyfs47BTkxzD5Q

Here a sample using a button on PORTB.2 and Led on PORTB.0

Code :

#include <htc.h>
	__CONFIG (FOSC_HS & CP_OFF & WDTE_OFF & PWRTE_ON );
#ifndef _XTAL_FREQ
 // Unless already defined assume 4MHz system frequency
 // This definition is required to calibrate __delay_us() and __delay_ms()
 #define _XTAL_FREQ 4000000
#endif
void init(void)
{
// port directions: 1=input, 0=output
TRISB = 0b00000100; //set's portb to outputs all but RB2 and it's a input
RB0 = 0;  //starts RB0 off
}
void main(void) //main code atfer here
{
init(); //runs startup code
while (1){  //loop
	if(RB2=0){  // check switch
		__delay_ms(50);  //delay to let switch debounce 
	if(RB2=0)
		RB0 = 1; //If switch is Low led is on
	else
		RB0 =0;  // Switch High led is off
   }
}
}

Just add a switch like this
switch.png