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#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include <avr/pgmspace.h>
#include <util/delay.h>
#include <stdlib.h>
// Debian's avr-libc lacks the ATTiny2313A WDTCSR definition
#define WDTCSR _SFR_IO8(0x21)
#include "system.h"
/*
* Charge Status IN -> PD3 (PCINT14)
* Piezo IN -X
* Charge Status LED OUT -> PD1
* Vcc -> VCC
* GND -> GND
* Warm White OUT -> PD5 (OC0B)
* Blue OUT -> PB2 (OC0A)
* Button IN -> PD2 (PCINT13)
* Red OUT -> PB3 (OC1A)
* Green OUT -> PB4 (OC1B)
*
*/
System blinkencat;
void System::initialize()
{
// disable analog comparator
ACSR |= _BV(ACD);
// disable unused modules
PRR |= _BV(PRUSI) | _BV(PRUSART);
wdt_disable();
DDRA = 0;
DDRB = _BV(DDB2) | _BV(DDB3) | _BV(DDB4);
DDRD = _BV(DDD1) | _BV(DDD5);
PORTD = _BV(PD2);
/*
* Pin change interrupts on PD2 and PD3.
* They are also used to wake the chip from sleep, hence we can't use
* INT0/INT1 directly. For those, only a level interrupt is detected
* asynchronously.
*/
PCMSK2 = _BV(PCINT13) | _BV(PCINT14);
GIMSK = _BV(PCIE2);
sei();
}
void System::idle()
{
MCUCR &= ~_BV(SM0);
MCUCR |= _BV(SE);
asm("sleep");
MCUCR &= ~_BV(SE);
}
void System::sleep()
{
MCUCR |= _BV(SM0) | _BV(SE);
asm("sleep");
MCUCR &= ~_BV(SE);
}
void System::set_outputs()
{
if (warmwhite) {
PORTD |= _BV(PD5);
} else {
PORTD &= ~_BV(PD5);
}
if (red) {
PORTB |= _BV(PB3);
} else {
PORTB &= ~_BV(PB3);
}
if (green) {
PORTB |= _BV(PB4);
} else {
PORTB &= ~_BV(PB4);
}
if (blue) {
PORTB |= _BV(PB2);
} else {
PORTB &= ~_BV(PB2);
}
}
void System::loop()
{
switch (mode) {
case OFF:
warmwhite = red = green = blue = 0;
break;
case WARMWHITE:
warmwhite = 255;
red = green = blue = 0;
break;
case RED:
red = 255;
warmwhite = green = blue = 0;
break;
case GREEN:
green = 255;
warmwhite = red = blue = 0;
break;
case BLUE:
blue = 255;
warmwhite = red = green = 0;
break;
case YELLOW:
red = green = 255;
warmwhite = blue = 0;
break;
case MAGENTA:
red = blue = 255;
warmwhite = green = 0;
break;
case CYAN:
green = blue = 255;
warmwhite = red = 0;
break;
case SUN:
warmwhite = red = green = blue = 255;
break;
default:
break;
}
set_outputs();
if (mode == OFF && !btn_debounce) {
sleep();
} else {
idle();
}
}
void System::next_mode(void)
{
if (!btn_debounce) {
mode = (BCMode)((mode + 1) % MODE_ENUM_MAX);
}
}
void System::debounce_start(void)
{
btn_debounce = 1;
wdt_reset();
WDTCSR = _BV(WDE) | _BV(WDCE);
WDTCSR = _BV(WDIE) | _BV(WDP1) | _BV(WDP0);
}
void System::debounce_done(void)
{
btn_debounce = 0;
wdt_disable();
}
ISR(WDT_OVERFLOW_vect)
{
blinkencat.debounce_done();
}
ISR(PCINT2_vect)
{
if (!(PIND & _BV(PD2))) {
blinkencat.next_mode();
}
if (PIND & _BV(PD3)) {
blinkencat.is_charging = 1;
PORTD |= _BV(PD1);
} else {
blinkencat.is_charging = 0;
PORTD &= ~_BV(PD1);
}
blinkencat.debounce_start();
}
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