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#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include <util/delay.h>
#include <stdlib.h>
#include "display.h"
#include "font2.h"
#include "modem.h"
#include "system.h"
volatile uint8_t disp[8];
int main (void)
{
// disable ADC to save power
PRR |= _BV(PRADC);
// dito
wdt_disable();
// Ports B and D drive the dot matrix display -> set all as output
DDRB = 0xff;
DDRD = 0xff;
PORTB = 0;
PORTD = 0;
// Enable pull-ups on PC3 and PC7 (button pins)
PORTC |= _BV(PC3) | _BV(PC7);
// Enable 8bit counter with prescaler=8 (-> timer frequency = 1MHz)
TCCR0A = _BV(CS01);
// raise timer interrupt on counter overflow (-> interrupt frequency = ~4kHz)
TIMSK0 = _BV(TOIE0);
disp[0] = 0xff;
disp[1] = 0xaa;
#if 0
// smile!
disp[0] = 0x08;
disp[1] = 0x04;
disp[2] = 0x62;
disp[3] = 0x02;
disp[4] = 0x02;
disp[5] = 0x62;
disp[6] = 0x04;
disp[7] = 0x08;
disp[8] = 0x00;
disp[9] = 0x00;
disp[10] = 0x00;
disp[11] = 0x00;
disp[12] = 0x00;
disp[13] = 0x00;
disp[14] = 0x00;
disp[15] = 0x00;
disp[16] = 0x28;
disp[17] = 0x44;
disp[18] = 0x22;
disp[19] = 0x02;
disp[20] = 0x02;
disp[21] = 0x22;
disp[22] = 0x44;
disp[23] = 0x28;
disp[24] = 0x00;
disp[25] = 0x00;
disp[26] = 0x00;
disp[27] = 0x00;
disp[28] = 0x00;
disp[29] = 0x00;
disp[30] = 0x00;
disp[31] = 0x00;
#endif
modem.init();
sei();
while (1) {
// nothing to do here, go to idle to save power
SMCR = _BV(SE);
asm("sleep");
rocket.loop();
}
return 0;
}
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