LaQで調光機能付きLEDデスクランプ

/*

 * File:   touch-led-light-12f1822.c

 * Author: kaimu

 *

 * Touch Sensor LED Light 

 *

 * Created on 2013/07/27, 10:30

 */

/*

 * target deveice : PIC12f1822

 * I/O

 *  ( INPUT )

 *  PIN7 : RA0 / PAD0 : Capacitive Sensing Pad

 *

 *  ( OUTPUT )

 *  PIN2 :  RA5 : LED  : 1=ON, 0=OFF

 *  PIN3 :  RA4 : Piezo Sounder ( Speaker )

 *

 */

/*

 * Reboot System Once, After Programming/Verify complete.

 */

#include <xc.h>

#define led()   ( RA5 ^= 1 )

#define ledOn()   ( RA5 = 1 )

#define ledOff()   ( RA5 = 0 )

#define buz() ( RA4 ^= 1 )

#define buzIn() ( TRISA4 = 1 )

#define buzOut() ( TRISA4 = 0 )

__CONFIG(

        FOSC_INTOSC & WDTE_OFF & PWRTE_ON & MCLRE_OFF & CP_OFF

        & CPD_OFF & BOREN_ON & CLKOUTEN_OFF & IESO_OFF & FCMEN_OFF

);

__CONFIG(PLLEN_OFF & STVREN_ON & WRT_OFF & BORV_HI & LVP_OFF);

void wait(volatile unsigned long t)

// Delay

{

while(t-- > 0) NOP();

}

volatile unsigned int CPSV[3]; // Capacitive Sensing parameter Threshold value for CPS0,1,2

#define CPSPERIOD 10 // Capacitive sensing Counting period

void initCPSV(void)

// Initialize Touch ON/OFF threshold value to 95% of Initial CPS value

{

    volatile unsigned int i;

    unsigned int cpsv0;

    // CaPacitive Sensing settings

    CPSCON0 = 0b00001000; // Oscillator is in Medium Range. Charge/Discharge Current is nominally 1.2uA

    // Timer1 settings

    T1CON   = 0b11000001 ; // TIMER1 clock source is CAPOSC. Prescaler 1:1, TIMER1 ON

    TMR1H   = 0 ;          // Initialize TIMER1

    TMR1L   = 0 ;

    PEIE    = 1 ;          // Peripheral Interrupt Enable

    GIE     = 1 ;          // General Interrupt Enable

    CPSON   = 1 ;          // CPS module ON

    for (i = 0; i < 3; i++) {

        CPSON = 0; // CPS module off

        CPSCON1 = i; // CPS channel 0,1,2 select.

        CPSON = 1; // CPS module on

        TMR1H = 0; TMR1L = 0; // Initialize TIMER1

        wait(CPSPERIOD);

        cpsv0 = (TMR1H<<8) + TMR1L; // Get CPS Counted value

        CPSV[i] = (unsigned int)((float)cpsv0 * 0.95); // When pad is touched, under 95% of initial value

    }

}

int isTouch(unsigned int padno)

// Touch Sensor using Capacitive Sensing module

// RETURN VALUE:

//   0  : Pad is NOT touched.

//   -1 : Pad is TOUCHED.

{

    unsigned int v; // CPS module output value

    int touched;

    CPSON = 0; // CPS module off

    if (padno > 2) {

        return 0; // Invalid port no

    } else {

        CPSCON1 = padno; // CPS channel 0,1,2 select.

    }

    CPSON = 1; // CPS module on

    TMR1H = 0; TMR1L = 0; // Initialize TIMER1

    wait(CPSPERIOD);

    v = (TMR1H<<8) + TMR1L; // Get CPS Counted value

    if (v < CPSV[padno]) {

        touched = -1;

    } else {

        touched = 0;

    }

    return touched;

}

void alarmBeep(void)

{

    volatile unsigned int i, j;

    buzOut(); // Buzzer OUTPUT mode

    for ( j = 0; j < 4000; j++) {

        buz();

        wait(8);

    }

    buzIn();// Buzzer INPUT mode

}

int main(void) {

    volatile int i;

    volatile unsigned int touchCount = 3; // How frequentry touched

    unsigned int duty[] = { 200, 50, 5, 0}; // Duty cycle parameter

    //Initialization

    OSCCON = 0b01111010; // PLL disable, 16MHz internal clock

    GIE    = 1; //Interrupt enable

    ANSELA = 0b00000111;         // RA012 analog port, others digital port

    CM1CON0 = 0x00;     //Comparator disable

  //  76543210

    TRISA =   0b00001111; //I/O Direction. RA0-3:input, RA4-5 : output

    LATA =   0b00000000; // PORTA Latch Settings

    initCPSV();

    alarmBeep();

    while (1) {

        if (touchCount == 3) {

            ledOff();

        } else {

            ledOn(); wait(duty[touchCount]);

            ledOff(); wait(duty[0] - duty[touchCount]);

        }

        if (isTouch(0)) {

            touchCount++;

            if (touchCount > 3) {

                touchCount = 0;

                alarmBeep();

            }

            alarmBeep();

            while (isTouch(0));

        }

    }

    return 0;

}