Enormous thanks to everyone for the help on the last project.  That's now
done and working well, and I'm on to something bigger and just as
inexplicably nonfunctional.  I have the PIC wired with a metal lamp between
pins 3 and 4, and an LED between pin 0 and ground.  The idea here is to
charge and discharge the body of the lamp very quickly, and if at any point
discharging takes too long, that indicates human contact and accompanying
increase in capacitance.  Instead, the LED just flickers very quickly and
dimly regardless of input.  The wait time here is very high just to make
sure that the lamp lights, which it fails to.  Any ideas??

-Eli


#include <htc.h>
#define LED GPIO0
#define OFF 0
#define ON 1
#define EMITTOR GPIO2

void checkFinger(void);
void init(void);
void delay(int delay);
void toggleLED(void);

void main(void){
	init();
	LED = ON;
	while(1){

		checkFinger();


	}
}
int z;
void checkFinger(void){
	
	EMITTOR = 1;
	
	for (z = 0; z < 300; z++)
		NOP();

	if (GPIO3 == 1)
		toggleLED();

	EMITTOR = 0;
	delay(200);
}

void toggleLED(void){
	if (LED == ON)
		LED = OFF;
	else
		LED = ON;
}

void init(void){ 
     ANS3 = 0; 
     VRCON = 0;             //Turn Off Voltage Reference Peripheral 
     CMCON = 0x07;          //Turn Off Comparator Peripheral 
     TMR0 = 0;              //Clear Timer0 
 
     OPTION = 0x80; 
	
	
	TRIS3 = 1;
	TRIS2 = 0;
	TRIS0 = 0;

//    INTCON = 0; 
/*	IOCB4 = 1;  //interrupt on change for pin 4 is on
	IOCB = 0x00010000;
	GPIE = 1;
	T0IF = 0;
	T0IE = 1; */
   
} 

void delay(int delay){
	int x, y;
	for (x = 0; x< delay; x++){
		for (y = 0; y<100; y++){
			NOP();
		}
	}
}
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