#include <xc.h>
#define _XTAL_FREQ 20e6
 
void main() {
    TRISA0 = 1;    // RA0 = FSR input (analog)
    TRISB0 = 1;    // RB0 = Touch input (digital)
    TRISD0 = 0;    // RD0 = TRIAC control (output)
    ADCON1 = 0x80; // AN0 analog, others digital
    ADCON0 = 0x01; // ADC on, AN0, Fosc/2
 
    while (1) {
        ADCON0bits.GO = 1;     // Start ADC conversion
        while (ADCON0bits.GO);  // Wait for conversion
        int fsrValue = ADRESH;  // Read FSR (8-bit)
 
        int touchValue = PORTBbits.RB0; // Read touch sensor
 
        // Cut power if grip is loose (FSR low or touch released)
        if (fsrValue < 50 || touchValue == 0) RD0 = 0; // TRIAC OFF
        else RD0 = 1;                                 // TRIAC ON
        __delay_ms(10);
    }
}

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