[kokare.git] / kokare.c

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/eeprom.h>
#include <inttypes.h>
#include <math.h>

#define SEGA 4
#define SEGB 2
#define SEGC 1
#define SEGD 32
#define SEGE 64
#define SEGF 16
#define SEGG 8
#define SEGP 128

uint8_t font[16] = {
    SEGA | SEGB | SEGC | SEGD | SEGE | SEGF,
    SEGB | SEGC,
    SEGA | SEGB | SEGD | SEGE | SEGG,
    SEGA | SEGB | SEGC | SEGD | SEGG,
    SEGB | SEGC | SEGF | SEGG,
    SEGA | SEGC | SEGD | SEGF | SEGG,
    SEGA | SEGC | SEGD | SEGE | SEGF | SEGG,
    SEGA | SEGB | SEGC,
    SEGA | SEGB | SEGC | SEGD | SEGE | SEGF | SEGG,
    SEGA | SEGB | SEGC | SEGD | SEGF | SEGG,
    SEGA | SEGB | SEGC | SEGE | SEGF | SEGG,
    SEGC | SEGD | SEGE | SEGF | SEGG,
    SEGA | SEGD | SEGE | SEGF,
    SEGB | SEGC | SEGD | SEGE | SEGG,
    SEGA | SEGD | SEGE | SEGF | SEGG,
    SEGA | SEGE | SEGF | SEGG,
};
/* LED */
uint8_t dsp[2] = {0, 0};
char leda = 0;
char ledc = 0;
/* Timer */
volatile int oticks = 0;
unsigned long mnow;
/* Pulse counter */
volatile char pstate = 0;
char pval = 0;
/* Switch */
volatile char sstate = 0;
int stime = 0;
/* Temp sensor */
volatile char tstate = 0;
volatile char tlock = 0;
unsigned long tstart;
unsigned long ttime;
unsigned long ttimea = 10000;
char tavgok = 0;
/* Conversion loop */
int tempk;
volatile ktok = 0;
/* Zero-cross detector*/
volatile char zok = 0;
volatile char ztime = 0;
/* Triac */
char trstate = 0;
char tron = 0;
volatile char trtime;
volatile char trdelay = 0;

void init(void)
{
    /* Timer init
     * Timer 0 cycles the Triac
     * Timer 1 is used for global timing
     * Timer 2 cycles the LED display
     */
    OCR0A = 100;
    TCCR0A = 2;
    TCCR0B = 1;
    TIMSK0 = 2;
    TCCR1A = 0;
    TCCR1B = 1;
    TIMSK1 = 1;
    OCR2A = 16;
    TCCR2A = 2;
    TCCR2B = 4;
    TIMSK2 = 2;
    
    /*
     * B0..2 = Pulse sensor
     * B3..5 = ISP
     * B6..7 = CLK
     */
    DDRB = 0x38;
    PORTB = 0x07;
    PCMSK0 = 0x07;
    PCICR = 0x01;
    /*
     * C0..5 = LEDA0..5
     * C6 = /RESET
     * C7 = NC
     */
    DDRC = 0x3f;
    PORTC = 0x00;
    /*
     * D0 = Triac
     * D1 = NTC FET
     * D2 = ZCD (INT0)
     * D3 = NTC Op-amp (INT1)
     * D4..5 = LEDA6..7
     * D6..7 = LEDC0..1
     */
    DDRD = 0xf3;
    PORTD = 0x00;
    EICRA = 0x0d;
    EIMSK = 0x03;
}

unsigned char bindisp(unsigned char num)
{
    unsigned char ret;
    
    ret = 0;
    if(num & 1)
	ret |= SEGA;
    if(num & 2)
	ret |= SEGB;
    if(num & 4)
	ret |= SEGC;
    if(num & 8)
	ret |= SEGD;
    if(num & 16)
	ret |= SEGE;
    if(num & 32)
	ret |= SEGF;
    if(num & 64)
	ret |= SEGG;
    if(num & 128)
	ret |= SEGP;
    return(ret);
}

void display(char num, char d0, char d1)
{
    dsp[0] = font[(num / 10) % 10] | (d0?SEGP:0);
    dsp[1] = font[num % 10] | (d1?SEGP:0);
}

void disphex(unsigned char num)
{
    dsp[0] = font[(num & 0xf0) >> 4];
    dsp[1] = font[num & 0x0f];
}

unsigned long getticks(void)
{
    uint16_t v;
    unsigned long r;
    
    cli();
    v = TCNT1;
    r = v + (((unsigned long)oticks) << 16);
    if((TIFR1 & 0x01) && !(v & 0x8000))
	r += 0x10000;
    sei();
    return(r);
}

void ledcycle(void)
{
    uint8_t c, d, v;
    
    if(++leda >= 8) {
	leda = 0;
	if(++ledc >= 2)
	    ledc = 0;
    }
    if(dsp[ledc] & (1 << leda)) {
	if(leda < 6) {
	    c = 1 << leda;
	    d = 0;
	} else {
	    c = 0;
	    d = 0x10 << (leda - 6);
	}
	d |= ledc?0x40:0x80;
    } else {
	c = d = 0;
    }
    PORTC = c;
    PORTD = (PORTD & 0x0f) | d;
}

void tempcycle(void)
{
    if(tstate == 0) {
	if((PIND & 8) && (tlock == 0)) {
	    cli();
	    PORTD |= 2;
	    sei();
	    tstart = mnow;
	    tstate = 1;
	}
    } else if(tstate == 1) {
	if(mnow - tstart > 1000) {
	    cli();
	    PORTD &= ~2;
	    sei();
	    tstate = 0;
	    tstart = mnow;
	}
    }
}

void calcavg(void)
{
    if(tlock == 1) {
	tlock = 2;
	ttimea = ((ttimea * 15) + ttime) >> 4;
	tlock = 0;
	tavgok = 1;
    }
}

void convcycle(void)
{
    static char state = 0;
    static unsigned long last = 0;
    static float a, ra, l, t;
    
    /*
     * Theoretically:
     *  t = RC * ln(2) => R = t / (C * ln(2))
     *  R = A * exp(B / T) => T = B / ln(R / A)
     *  T = B / ln(R / (A * C * ln(2)))
     * In the following: 
     *  a = ttimea as float
     *  C = 1e6 / (A * C * ln(2))
     *  ra = a * C
     *  l = ln(ra)
     *  t = B / l
     * Note, temperature is in Kelvin
     */
#define C 9.361168
#define B 4020.0
    if(state == 0) {
	if((mnow - last > 200000) && tavgok) {
	    a = (float)ttimea;
	    state = 1;
	    tavgok = 0;
	    last = mnow;
	}
    } else if(state == 1) {
	ra = a * C;
	state = 2;
    } else if(state == 2) {
	l = log(ra);
	state = 3;
    } else if(state == 3) {
	t = B / l;
	state = 4;
    } else if(state == 4) {
	tempk = (int)t;
	ktok = 1;
	state = 0;
    }
}

int main(void)
{
    int state, cur, run, rstate, delta;
    unsigned long utime;
    
    state = 1;
    cur = eeprom_read_byte(0);
    if(cur < 0)
	cur = 0;
    if(cur > 100)
	cur = 100;
    run = 0;
    rstate = 0;
    utime = getticks();
    init();
    sei();
    if(cur < 100)
	display(cur, 0, 0);
    else
	dsp[0] = dsp[1] = SEGG;

    while(1) {
	mnow = getticks();
	tempcycle();
	calcavg();
	convcycle();

#if 1
	/*
	 * User interface
	 */
	if(state == 0) {
	    /* Display temperature */
	    if(ktok) {
		ktok = 0;
		if((tempk >= 273) && (tempk <= 372)) {
		    display(tempk - 273, 0, run);
		} else {
		    dsp[0] = SEGG;
		    dsp[1] = SEGG | (run?SEGP:0);
		}
	    }
	    if(pval != 0)
		state = 1;
	    if(sstate == 2) {
		sstate = 0;
		if(stime > 10)
		    state = 2;
		else
		    run = !run;
	    }
	} else if(state == 1) {
	    /* Temp setting */
	    if(pval != 0) {
		cur += pval;
		pval = 0;
		if(cur < 0)
		    cur = 0;
		if(cur > 100)
		    cur = 100;
		utime = mnow;
	    }
	    if(mnow - utime > 2000000) {
		state = 0;
		eeprom_write_byte(0, cur);
	    }
	    if(sstate == 2) {
		run = !run;
		sstate = 0;
	    }
	    if(cur < 100) {
		display(cur, 0, run);
	    } else {
		dsp[0] = SEGG;
		dsp[1] = SEGG | (run?SEGP:0);
	    }
	} else if(state == 2) {
	    /* Display raw temp time reading */
	    if(ttimea < 20000) {
		display((ttimea / 100) % 100, 1, ttimea >= 10000);
	    } else {
		display(ttimea / 1000, 0, 0);
	    }
	    if(sstate == 2) {
		state = 0;
		sstate = 0;
	    }
	}
	/*
	 * Set Triac to match temperature
	 */
	if(run) {
	    delta = cur - (tempk - 273);
	    if(rstate == 0) {
		if(delta > 0) {
		    tron = 1;
		    if(delta > 8) {
			/* For some reason, the Triac currently doesn't
			 * trigger on one of the AC half-cycles below 0.7
			 * ms. */
			trdelay = 7;
		    } else {
			trdelay = 79 - (delta * 9);
		    }
		} else {
		    tron = 0;
		    rstate = 1;
		}
	    } else if(rstate == 1) {
		tron = 0;
		if(delta >= 2)
		    rstate = 0;
	    }
	} else {
	    tron = 0;
	}
#endif
	/*
	  dsp[0] = bindisp((ttimea & 0xff00) >> 8);
	  dsp[1] = bindisp(ttimea & 0x00ff);
	*/
	/*
	  disphex((ttimea & 0xff000) >> 12);
	*/
#if 0
	/*
	  Temp display
	*/
	if(ttimea < 20000) {
	    display((ttimea / 100) % 100);
	    dsp[0] |= SEGP;
	    if(ttimea >= 10000)
		dsp[1] |= SEGP;
	} else {
	    display(ttimea / 1000);
	}
#endif
#if 0
	/*
	 * ZVD debug
	 */
	if(zok) {
	    if(++cur > 99)
		cur = 0;
	    display(cur);
	    zok = 0;
	}
#endif
#if 0
	/*
	  Phony Triac control
	 */
	if(pval != 0) {
	    cur += pval;
	    if(cur < 0)
		cur = 0;
	    if(cur > 99)
		cur = 99;
	    display(cur);
	    trdelay = 99 - cur;
	    pval = 0;
	}
	if(sstate == 2) {
	    tron = !tron;
	    sstate = 0;
	}
	if(tron)
	    dsp[1] |= SEGP;
	else
	    dsp[1] &= ~SEGP;
#endif
#if 0
	/*
	  Pulse counter display
	*/
	cur += pval;
	pval = 0;
	if(sstate == 2) {
	    cur = stime;
	    sstate = 0;
	}
	if(cur > 99)
	    cur = 99;
	if(cur < -99)
	    cur = -99;
	if(cur < 0) {
	    display(-cur);
	    dsp[0] |= SEGP;
	} else {
	    display(cur);
	}
	if(PINB & 4)
	    dsp[1] |= SEGP;
#endif
    }
}

ISR(SIG_INTERRUPT0)
{
    ztime = 0;
    zok = 1;
}

ISR(SIG_INTERRUPT1)
{
    unsigned long now;
    
    now = getticks();
    if(tstate == 0) {
	tstate = 1;
	if(tlock != 2)
	    ttime = now - tstart;
	tstart = now;
	PORTD |= 2;
	tlock = 1;
    }
}

ISR(SIG_OUTPUT_COMPARE0A)
{
    if(trstate == 0) {
	ztime++;
	if(tron && (ztime >= trdelay)) {
	    PORTD |= 1;
	    trstate = 1;
	    trtime = 0;
	}
    } else if(trstate == 1) {
	trtime++;
	if(trtime >= 5) {
	    PORTD &= ~1;
	    trstate = 0;
	}
    }
}

ISR(SIG_OUTPUT_COMPARE2A)
{
    ledcycle();
}

ISR(SIG_OVERFLOW1)
{
    oticks++;
}

ISR(SIG_PIN_CHANGE0)
{
    if((sstate == 0) && !(PINB & 4)) {
	stime = oticks;
	sstate = 1;
    }
    if((sstate == 1) && (PINB & 4)) {
	stime = oticks - stime;
	sstate = 2;
    }
    if(pstate == 0) {
	if((PINB & 2) == 0) {
	    pstate = 1;
	} else if((PINB & 1) == 0) {
	    pstate = 2;
	}
    } else if(pstate == 1) {
	if((PINB & 1) == 0) {
	    pval++;
	    pstate = 3;
	} else {
	    pstate = 0;
	}
    } else if(pstate == 2) {
	if((PINB & 2) == 0) {
	    pval--;
	    pstate = 3;
	} else {
	    pstate = 0;
	}
    } else {
	if((PINB & 2) && (PINB & 1))
	    pstate = 0;
    }
}
Commit	Line	Data
31415646 FT	1	#include <avr/io.h>
31415646 FT	2	#include <avr/interrupt.h>
9a754855	3	#include <avr/eeprom.h>
31415646	4	#include <inttypes.h>
2f37b902	5	#include <math.h>
31415646	6
2378926d FT	7	#define SEGA 4
	8	#define SEGB 2
	9	#define SEGC 1
	10	#define SEGD 32
	11	#define SEGE 64
	12	#define SEGF 16
	13	#define SEGG 8
	14	#define SEGP 128
31415646 FT	15
	16	uint8_t font[16] = {
	17	SEGA \| SEGB \| SEGC \| SEGD \| SEGE \| SEGF,
	18	SEGB \| SEGC,
	19	SEGA \| SEGB \| SEGD \| SEGE \| SEGG,
	20	SEGA \| SEGB \| SEGC \| SEGD \| SEGG,
	21	SEGB \| SEGC \| SEGF \| SEGG,
	22	SEGA \| SEGC \| SEGD \| SEGF \| SEGG,
	23	SEGA \| SEGC \| SEGD \| SEGE \| SEGF \| SEGG,
	24	SEGA \| SEGB \| SEGC,
	25	SEGA \| SEGB \| SEGC \| SEGD \| SEGE \| SEGF \| SEGG,
	26	SEGA \| SEGB \| SEGC \| SEGD \| SEGF \| SEGG,
	27	SEGA \| SEGB \| SEGC \| SEGE \| SEGF \| SEGG,
	28	SEGC \| SEGD \| SEGE \| SEGF \| SEGG,
	29	SEGA \| SEGD \| SEGE \| SEGF,
	30	SEGB \| SEGC \| SEGD \| SEGE \| SEGG,
	31	SEGA \| SEGD \| SEGE \| SEGF \| SEGG,
	32	SEGA \| SEGE \| SEGF \| SEGG,
	33	};
	34	/* LED */
	35	uint8_t dsp[2] = {0, 0};
	36	char leda = 0;
	37	char ledc = 0;
	38	/* Timer */
26e5097c	39	volatile int oticks = 0;
59d1e985	40	unsigned long mnow;
31415646	41	/* Pulse counter */
26e5097c	42	volatile char pstate = 0;
31415646 FT	43	char pval = 0;
31415646 FT	44	/* Switch */
26e5097c	45	volatile char sstate = 0;
31415646 FT	46	int stime = 0;
31415646 FT	47	/* Temp sensor */
26e5097c FT	48	volatile char tstate = 0;
26e5097c FT	49	volatile char tlock = 0;
31415646 FT	50	unsigned long tstart;
	51	unsigned long ttime;
	52	unsigned long ttimea = 10000;
c1346a55	53	char tavgok = 0;
2f37b902 FT	54	/* Conversion loop */
	55	int tempk;
	56	volatile ktok = 0;
31415646	57	/* Zero-cross detector*/
26e5097c	58	volatile char zok = 0;
c7732766	59	volatile char ztime = 0;
31415646	60	/* Triac */
59d1e985 FT	61	char trstate = 0;
59d1e985 FT	62	char tron = 0;
c7732766 FT	63	volatile char trtime;
c7732766 FT	64	volatile char trdelay = 0;
31415646 FT	65
	66	void init(void)
	67	{
c7732766	68	/* Timer init
8c536798	69	* Timer 0 cycles the Triac
c7732766	70	* Timer 1 is used for global timing
8c536798	71	* Timer 2 cycles the LED display
c7732766 FT	72	*/
	73	OCR0A = 100;
	74	TCCR0A = 2;
	75	TCCR0B = 1;
	76	TIMSK0 = 2;
31415646 FT	77	TCCR1A = 0;
	78	TCCR1B = 1;
	79	TIMSK1 = 1;
8c536798 FT	80	OCR2A = 16;
	81	TCCR2A = 2;
	82	TCCR2B = 4;
	83	TIMSK2 = 2;
31415646 FT	84
	85	/*
	86	* B0..2 = Pulse sensor
	87	* B3..5 = ISP
	88	* B6..7 = CLK
	89	*/
c1346a55	90	DDRB = 0x38;
31415646 FT	91	PORTB = 0x07;
	92	PCMSK0 = 0x07;
	93	PCICR = 0x01;
	94	/*
	95	* C0..5 = LEDA0..5
	96	* C6 = /RESET
	97	* C7 = NC
	98	*/
	99	DDRC = 0x3f;
	100	PORTC = 0x00;
	101	/*
	102	* D0 = Triac
	103	* D1 = NTC FET
	104	* D2 = ZCD (INT0)
	105	* D3 = NTC Op-amp (INT1)
	106	* D4..5 = LEDA6..7
	107	* D6..7 = LEDC0..1
	108	*/
	109	DDRD = 0xf3;
	110	PORTD = 0x00;
	111	EICRA = 0x0d;
	112	EIMSK = 0x03;
	113	}
	114
	115	unsigned char bindisp(unsigned char num)
	116	{
	117	unsigned char ret;
	118
	119	ret = 0;
	120	if(num & 1)
	121	ret \|= SEGA;
	122	if(num & 2)
	123	ret \|= SEGB;
	124	if(num & 4)
	125	ret \|= SEGC;
	126	if(num & 8)
	127	ret \|= SEGD;
	128	if(num & 16)
	129	ret \|= SEGE;
	130	if(num & 32)
	131	ret \|= SEGF;
	132	if(num & 64)
	133	ret \|= SEGG;
	134	if(num & 128)
	135	ret \|= SEGP;
	136	return(ret);
	137	}
	138
cd47e1a3	139	void display(char num, char d0, char d1)
31415646	140	{
cd47e1a3 FT	141	dsp[0] = font[(num / 10) % 10] \| (d0?SEGP:0);
cd47e1a3 FT	142	dsp[1] = font[num % 10] \| (d1?SEGP:0);
31415646 FT	143	}
	144
	145	void disphex(unsigned char num)
	146	{
	147	dsp[0] = font[(num & 0xf0) >> 4];
	148	dsp[1] = font[num & 0x0f];
	149	}
	150
	151	unsigned long getticks(void)
	152	{
cd17a211 FT	153	uint16_t v;
	154	unsigned long r;
	155
41fabc21	156	cli();
cd17a211 FT	157	v = TCNT1;
	158	r = v + (((unsigned long)oticks) << 16);
	159	if((TIFR1 & 0x01) && !(v & 0x8000))
41fabc21 FT	160	r += 0x10000;
	161	sei();
	162	return(r);
31415646 FT	163	}
	164
	165	void ledcycle(void)
	166	{
31415646 FT	167	uint8_t c, d, v;
31415646 FT	168
8c536798 FT	169	if(++leda >= 8) {
	170	leda = 0;
	171	if(++ledc >= 2)
	172	ledc = 0;
	173	}
	174	if(dsp[ledc] & (1 << leda)) {
	175	if(leda < 6) {
	176	c = 1 << leda;
	177	d = 0;
31415646	178	} else {
8c536798 FT	179	c = 0;
8c536798 FT	180	d = 0x10 << (leda - 6);
31415646	181	}
8c536798 FT	182	d \|= ledc?0x40:0x80;
	183	} else {
	184	c = d = 0;
31415646	185	}
8c536798 FT	186	PORTC = c;
8c536798 FT	187	PORTD = (PORTD & 0x0f) \| d;
31415646 FT	188	}
	189
	190	void tempcycle(void)
	191	{
31415646 FT	192	if(tstate == 0) {
31415646 FT	193	if((PIND & 8) && (tlock == 0)) {
c7732766	194	cli();
31415646	195	PORTD \|= 2;
c7732766	196	sei();
59d1e985	197	tstart = mnow;
31415646 FT	198	tstate = 1;
	199	}
	200	} else if(tstate == 1) {
59d1e985	201	if(mnow - tstart > 1000) {
c7732766	202	cli();
31415646	203	PORTD &= ~2;
c7732766	204	sei();
31415646	205	tstate = 0;
59d1e985	206	tstart = mnow;
31415646 FT	207	}
	208	}
	209	}
	210
	211	void calcavg(void)
	212	{
	213	if(tlock == 1) {
	214	tlock = 2;
	215	ttimea = ((ttimea * 15) + ttime) >> 4;
	216	tlock = 0;
c1346a55	217	tavgok = 1;
31415646 FT	218	}
	219	}
	220
2f37b902 FT	221	void convcycle(void)
	222	{
	223	static char state = 0;
	224	static unsigned long last = 0;
	225	static float a, ra, l, t;
	226
	227	/*
	228	* Theoretically:
	229	* t = RC * ln(2) => R = t / (C * ln(2))
	230	* R = A * exp(B / T) => T = B / ln(R / A)
	231	* T = B / ln(R / (A * C * ln(2)))
	232	* In the following:
	233	* a = ttimea as float
	234	* C = 1e6 / (A * C * ln(2))
	235	* ra = a * C
	236	* l = ln(ra)
	237	* t = B / l
	238	* Note, temperature is in Kelvin
	239	*/
5376f2e5	240	#define C 9.361168
2f37b902 FT	241	#define B 4020.0
	242	if(state == 0) {
	243	if((mnow - last > 200000) && tavgok) {
	244	a = (float)ttimea;
	245	state = 1;
	246	tavgok = 0;
9ac074a9	247	last = mnow;
2f37b902 FT	248	}
	249	} else if(state == 1) {
	250	ra = a * C;
	251	state = 2;
	252	} else if(state == 2) {
	253	l = log(ra);
	254	state = 3;
	255	} else if(state == 3) {
	256	t = B / l;
	257	state = 4;
	258	} else if(state == 4) {
	259	tempk = (int)t;
	260	ktok = 1;
	261	state = 0;
	262	}
	263	}
	264
31415646 FT	265	int main(void)
31415646 FT	266	{
1eabd7a9	267	int state, cur, run, rstate, delta;
c1346a55	268	unsigned long utime;
31415646	269
9a754855 FT	270	state = 1;
	271	cur = eeprom_read_byte(0);
	272	if(cur < 0)
	273	cur = 0;
	274	if(cur > 100)
	275	cur = 100;
174dfeb5	276	run = 0;
1eabd7a9	277	rstate = 0;
9a754855	278	utime = getticks();
31415646 FT	279	init();
31415646 FT	280	sei();
9a754855 FT	281	if(cur < 100)
	282	display(cur, 0, 0);
	283	else
	284	dsp[0] = dsp[1] = SEGG;
59d1e985	285
31415646	286	while(1) {
59d1e985	287	mnow = getticks();
31415646 FT	288	tempcycle();
31415646 FT	289	calcavg();
2f37b902	290	convcycle();
31415646	291
63e3aac7	292	#if 1
c1346a55 FT	293	/*
	294	* User interface
	295	*/
	296	if(state == 0) {
	297	/* Display temperature */
2f37b902 FT	298	if(ktok) {
	299	ktok = 0;
	300	if((tempk >= 273) && (tempk <= 372)) {
cd47e1a3	301	display(tempk - 273, 0, run);
c1346a55	302	} else {
cd47e1a3 FT	303	dsp[0] = SEGG;
cd47e1a3 FT	304	dsp[1] = SEGG \| (run?SEGP:0);
c1346a55 FT	305	}
c1346a55 FT	306	}
174dfeb5	307	if(pval != 0)
c1346a55	308	state = 1;
2f37b902 FT	309	if(sstate == 2) {
2f37b902 FT	310	sstate = 0;
174dfeb5	311	if(stime > 10)
2f37b902	312	state = 2;
174dfeb5 FT	313	else
174dfeb5 FT	314	run = !run;
2f37b902	315	}
c1346a55	316	} else if(state == 1) {
174dfeb5	317	/* Temp setting */
c1346a55 FT	318	if(pval != 0) {
	319	cur += pval;
	320	pval = 0;
	321	if(cur < 0)
	322	cur = 0;
174dfeb5 FT	323	if(cur > 100)
174dfeb5 FT	324	cur = 100;
c1346a55 FT	325	utime = mnow;
c1346a55 FT	326	}
9a754855	327	if(mnow - utime > 2000000) {
c1346a55	328	state = 0;
9a754855 FT	329	eeprom_write_byte(0, cur);
9a754855 FT	330	}
2f37b902	331	if(sstate == 2) {
174dfeb5	332	run = !run;
2f37b902 FT	333	sstate = 0;
2f37b902 FT	334	}
66fcaf44 FT	335	if(cur < 100) {
	336	display(cur, 0, run);
	337	} else {
	338	dsp[0] = SEGG;
	339	dsp[1] = SEGG \| (run?SEGP:0);
	340	}
2f37b902	341	} else if(state == 2) {
174dfeb5	342	/* Display raw temp time reading */
2f37b902	343	if(ttimea < 20000) {
cd47e1a3	344	display((ttimea / 100) % 100, 1, ttimea >= 10000);
2f37b902	345	} else {
cd47e1a3	346	display(ttimea / 1000, 0, 0);
2f37b902 FT	347	}
	348	if(sstate == 2) {
	349	state = 0;
	350	sstate = 0;
	351	}
c1346a55	352	}
174dfeb5 FT	353	/*
	354	* Set Triac to match temperature
	355	*/
	356	if(run) {
1eabd7a9 FT	357	delta = cur - (tempk - 273);
	358	if(rstate == 0) {
	359	if(delta > 0) {
	360	tron = 1;
	361	if(delta > 8) {
	362	/* For some reason, the Triac currently doesn't
	363	* trigger on one of the AC half-cycles below 0.7
	364	* ms. */
	365	trdelay = 7;
	366	} else {
	367	trdelay = 79 - (delta * 9);
	368	}
174dfeb5	369	} else {
1eabd7a9 FT	370	tron = 0;
1eabd7a9 FT	371	rstate = 1;
174dfeb5	372	}
1eabd7a9	373	} else if(rstate == 1) {
174dfeb5	374	tron = 0;
1eabd7a9 FT	375	if(delta >= 2)
1eabd7a9 FT	376	rstate = 0;
174dfeb5 FT	377	}
	378	} else {
	379	tron = 0;
	380	}
c1346a55	381	#endif
31415646 FT	382	/*
	383	dsp[0] = bindisp((ttimea & 0xff00) >> 8);
	384	dsp[1] = bindisp(ttimea & 0x00ff);
	385	*/
	386	/*
	387	disphex((ttimea & 0xff000) >> 12);
	388	*/
495bea06	389	#if 0
59d1e985 FT	390	/*
	391	Temp display
	392	*/
31415646 FT	393	if(ttimea < 20000) {
	394	display((ttimea / 100) % 100);
	395	dsp[0] \|= SEGP;
	396	if(ttimea >= 10000)
	397	dsp[1] \|= SEGP;
	398	} else {
	399	display(ttimea / 1000);
	400	}
59d1e985	401	#endif
2378926d	402	#if 0
72ef9ac1 FT	403	/*
	404	* ZVD debug
	405	*/
	406	if(zok) {
	407	if(++cur > 99)
	408	cur = 0;
	409	display(cur);
	410	zok = 0;
	411	}
63e3aac7	412	#endif
c1346a55	413	#if 0
495bea06 FT	414	/*
	415	Phony Triac control
	416	*/
	417	if(pval != 0) {
	418	cur += pval;
	419	if(cur < 0)
	420	cur = 0;
	421	if(cur > 99)
	422	cur = 99;
	423	display(cur);
c7732766	424	trdelay = 99 - cur;
495bea06 FT	425	pval = 0;
	426	}
	427	if(sstate == 2) {
	428	tron = !tron;
	429	sstate = 0;
	430	}
4f42f213 FT	431	if(tron)
	432	dsp[1] \|= SEGP;
	433	else
	434	dsp[1] &= ~SEGP;
495bea06	435	#endif
59d1e985	436	#if 0
31415646	437	/*
59d1e985 FT	438	Pulse counter display
59d1e985 FT	439	*/
31415646 FT	440	cur += pval;
	441	pval = 0;
	442	if(sstate == 2) {
	443	cur = stime;
	444	sstate = 0;
	445	}
	446	if(cur > 99)
	447	cur = 99;
	448	if(cur < -99)
	449	cur = -99;
	450	if(cur < 0) {
	451	display(-cur);
	452	dsp[0] \|= SEGP;
	453	} else {
	454	display(cur);
	455	}
4f42f213 FT	456	if(PINB & 4)
4f42f213 FT	457	dsp[1] \|= SEGP;
59d1e985	458	#endif
31415646 FT	459	}
	460	}
	461
	462	ISR(SIG_INTERRUPT0)
	463	{
c7732766	464	ztime = 0;
59d1e985	465	zok = 1;
31415646 FT	466	}
	467
	468	ISR(SIG_INTERRUPT1)
	469	{
	470	unsigned long now;
	471
41fabc21	472	now = getticks();
31415646 FT	473	if(tstate == 0) {
	474	tstate = 1;
	475	if(tlock != 2)
	476	ttime = now - tstart;
	477	tstart = now;
	478	PORTD \|= 2;
	479	tlock = 1;
	480	}
	481	}
	482
c7732766 FT	483	ISR(SIG_OUTPUT_COMPARE0A)
	484	{
	485	if(trstate == 0) {
	486	ztime++;
	487	if(tron && (ztime >= trdelay)) {
	488	PORTD \|= 1;
	489	trstate = 1;
	490	trtime = 0;
	491	}
	492	} else if(trstate == 1) {
	493	trtime++;
	494	if(trtime >= 5) {
	495	PORTD &= ~1;
	496	trstate = 0;
	497	}
	498	}
	499	}
	500
8c536798 FT	501	ISR(SIG_OUTPUT_COMPARE2A)
	502	{
	503	ledcycle();
	504	}
	505
31415646 FT	506	ISR(SIG_OVERFLOW1)
31415646 FT	507	{
31415646 FT	508	oticks++;
	509	}
	510
	511	ISR(SIG_PIN_CHANGE0)
	512	{
4f42f213	513	if((sstate == 0) && !(PINB & 4)) {
31415646 FT	514	stime = oticks;
	515	sstate = 1;
	516	}
4f42f213	517	if((sstate == 1) && (PINB & 4)) {
31415646 FT	518	stime = oticks - stime;
	519	sstate = 2;
	520	}
	521	if(pstate == 0) {
	522	if((PINB & 2) == 0) {
	523	pstate = 1;
2378926d	524	} else if((PINB & 1) == 0) {
31415646 FT	525	pstate = 2;
	526	}
	527	} else if(pstate == 1) {
2378926d	528	if((PINB & 1) == 0) {
31415646 FT	529	pval++;
	530	pstate = 3;
	531	} else {
	532	pstate = 0;
	533	}
	534	} else if(pstate == 2) {
	535	if((PINB & 2) == 0) {
	536	pval--;
	537	pstate = 3;
	538	} else {
	539	pstate = 0;
	540	}
	541	} else {
2378926d	542	if((PINB & 2) && (PINB & 1))
31415646 FT	543	pstate = 0;
	544	}
	545	}