util.h File Reference

Utilities. More...

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Defines
#define	BV2(a, b)   (_BV(a)|_BV(b))
#define	BV3(a, b, c)   (_BV(a)|_BV(b)|_BV(c))
#define	BV4(a, b, c, d)   (_BV(a)|_BV(b)|_BV(c)|_BV(d))
#define	BV5(a, b, c, d, e)   (_BV(a)|_BV(b)|_BV(c)|_BV(d)|_BV(e))
#define	BV6(a, b, c, d, e, f)   (_BV(a)|_BV(b)|_BV(c)|_BV(d)|_BV(e)|_BV(f))
#define	BV7(a, b, c, d, e, f, g)   (_BV(a)|_BV(b)|_BV(c)|_BV(d)|_BV(e)|_BV(f)|_BV(g))
#define	maketime(hh, mm)   (((hh) << 8) + (mm))
	Make BCD time from 2 bytes.
#define	_frombcd(x)   ((x & 017) + (((x) & 0160)>>4) * 10)
Enumerations
enum	_blinkmode { BLINK_NONE = 0, BLINK_HH = 1, BLINK_MM = 2, BLINK_ALL = 3 }
	Blinking modes, see timer0 overflow interrupt. More...
Functions
uint8_t	frombcd (uint8_t)
uint8_t	days_in_month_bcd (uint8_t year, uint8_t month)
uint8_t	bcd_increment (uint8_t x)
	Increment BCD value by 1.
uint8_t	day_of_week (uint8_t y, uint8_t m, uint8_t d)
	Get day of week, 0 = Sunday. Input parameters are binary (not BCD).
void	set_blinkmode (uint8_t mode)
	Set blinkmode.
void	duty_set (uint8_t d)
	Sets tubes duty cycle. Valid values are 1..4.
uint8_t	duty_get ()
void	fadeto (uint16_t t)
uint16_t	get_display_value ()
Variables
void(*	blinkhandler )(uint8_t)
	Called every blink, unless NULL.

---

Detailed Description

Utilities.

Bit settings. BCD conversions. Calendar.

---

Define Documentation

#define _frombcd

(

x

)

((x & 017) + (((x) & 0160)>>4) * 10)

Convert to binary from BCD representation

See also:

frombcd

#define BV2	(	a,
		b		)	(_BV(a)|_BV(b))

#define BV3	(	a,
		b,
		c		)	(_BV(a)|_BV(b)|_BV(c))

#define BV4	(	a,
		b,
		c,
		d		)	(_BV(a)|_BV(b)|_BV(c)|_BV(d))

#define BV5	(	a,
		b,
		c,
		d,
		e		)	(_BV(a)|_BV(b)|_BV(c)|_BV(d)|_BV(e))

#define BV6	(	a,
		b,
		c,
		d,
		e,
		f		)	(_BV(a)|_BV(b)|_BV(c)|_BV(d)|_BV(e)|_BV(f))

#define BV7	(	a,
		b,
		c,
		d,
		e,
		f,
		g		)	(_BV(a)|_BV(b)|_BV(c)|_BV(d)|_BV(e)|_BV(f)|_BV(g))

#define maketime	(	hh,
		mm		)	(((hh) << 8) + (mm))

Make BCD time from 2 bytes.

---

Enumeration Type Documentation

enum _blinkmode

Blinking modes, see timer0 overflow interrupt.

Enumerator:

BLINK_NONE
BLINK_HH
BLINK_MM
BLINK_ALL

                {
    BLINK_NONE = 0,
    BLINK_HH = 1,
    BLINK_MM = 2,
    BLINK_ALL = 3,
};

---

Function Documentation

uint8_t bcd_increment

(

uint8_t

x

)

Increment BCD value by 1.

                                 {
    x++;
    if ((x & 0x0f) >= 0x0a)
        x += 0x10 - 0x0a;
    if (x >= 0xa0) 
       x = 0;
    return x;
}

uint8_t day_of_week	(	uint8_t	y,
		uint8_t	m,
		uint8_t	d
	)

Get day of week, 0 = Sunday. Input parameters are binary (not BCD).

                                                     {
    uint8_t leap = y%4 == 0;
    uint16_t centurydays = 6 + y * 365 + (y+3)/4; // year 2000 started on Saturday
    for (; --m >= 1; ) {
        centurydays += month_length(m,leap);
    }
    
    centurydays += d-1;
    
    return (centurydays % 7);
}

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uint8_t days_in_month_bcd	(	uint8_t	year,
		uint8_t	month
	)

Return BCD count of days in month for given BCD year and month. Valid only for years 2000-2099.

                                                       {
    uint8_t y = frombcd(year);//(year & 7) + ((year & 070)>>3) * 10;
    uint8_t m = frombcd(month);//(month & 7) + ((month & 070)>>3) * 10;
    uint8_t leap = y % 4 == 0; // non y2k1-compliant, but should be correct for the next 91 years or so :)
    
    uint8_t knuckle = m < 8 ? (m & 1) == 1 : (m & 1) == 0;
    return knuckle ? 0x31 : m != 2 ? 0x30 : leap ? 0x29 : 0x28;
}

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uint8_t duty_get

(

)

[inline]

{ return on_duty; }

void duty_set

(

uint8_t

d

)

Sets tubes duty cycle. Valid values are 1..4.

                         {
    on_duty = d;
    voltage_adjust(0);
}

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void fadeto

(

uint16_t

t

)

Start fading time to given value. Transition is performed in TIMER0_OVF_vect and takes FADETIME cycles.

                        { 
    timef = t; fadetime = -1;
    voltage_adjust(0);
}

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uint8_t frombcd

(

uint8_t

)

Convert to binary from BCD representation as a function.

See also:

_frombcd

                           {
    return _frombcd(x);
}

uint16_t get_display_value

(

)

[inline]

                                    {
    return timef;
}

void set_blinkmode

(

uint8_t

mode

)

[inline]

Set blinkmode.

                                        {
    blinkmode = mode;
}

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Variable Documentation

void(* blinkhandler)(uint8_t)

Called every blink, unless NULL.