Rakett69: taimeriga pommi "demineerimine"

[spirit]

Kood:

#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#include <avr/wdt.h>
#define set_bit sbi
#define clear_bit cbi
#define is_set(sfr, bit) (sfr & _BV(bit))

volatile uint16_t speed = 1 , safe = 0;
volatile uint32_t cnt = 0 , t = 0 , Wait_Turbo = 0;
static const uint8_t hex [] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
volatile uint8_t numbers[11] = {
    //HGFEDCBA
    0b01000100,//0 --B--
    0b11110110,//1 | |
    0b10001100,//2 H A
    0b10010100,//3 | |
    0b00110110,//4 --G--
    0b00010101,//5 | |
    0b00000101,//6 E D
    0b11110100,//7 | |
    0b00000100,//8 --F-- C
    0b00010100,//9
    0b11111111
};

void delay( uint16_t len ){
    len = len - 2;
    for ( ; len > 0 ; len--){
        asm( "nop" );
        asm( "nop" );
    }
}

void delayms( uint8_t len ){
    len--;
    for ( ; len > 0 ; len-- ){
        delay( 999 );
        asm( "nop" );
        asm( "nop" );
        asm( "nop" );
        asm( "nop" );
        asm( "nop" );
        asm( "nop" );
        asm( "nop" );
    }
    delay( 998 );
}

void doSPI( uint8_t data ){
    sbi( DDRB , 5 );
    sbi( DDRB , 3 );
    SPCR = (1 << SPE) | (1 << MSTR) | 0b0011;
    sbi( SPSR , 2 );
    SPDR = data;
    while( !(SPSR & (1 << SPIF)) );
}

void WriteNum( uint32_t num , uint8_t digits ){
    uint8_t i;
    cbi( PORTB , 2 );
    for ( i = 0 ; i < digits ; i++ ) {
        if ( num || !i )
            doSPI( numbers[num%10] );
        else
            doSPI( numbers[10] );
        num/=10;
    }
    sbi( PORTB , 2 );
}

// Programmers Notepad - pomm.c
SIGNAL ( SIG_OVERFLOW0 ) { //Siia j�utakse ca 30 korda sekundis
    if ( safe > 8 )
        return;
    if ( t > speed )
        t -= speed;
    else
        t = 0;
    if ( Wait_Turbo )
        Wait_Turbo--;
}

uint8_t turbo = 0;

void Turbo( uint8_t mode ){
    if ( !(turbo & (1 << mode)) ) {
        turbo |= 1 << mode;
        speed *= 2;
    }
}

int main( void ){
    CLKPR = 128;
    CLKPR = 0;
    wdt_reset();
    wdt_enable( WDTO_500MS );
    cbi( PRR , 2 );
    DDRB = 0x45;
    DDRC = 0x20;
    PORTC = 0x0F;
    PORTD = 0xFF;
    sei ();
    delayms( 200 );
    TCCR0B = 0b101;
    TIMSK0 = 1;
    WriteNum( 900 , 3 );
    while ( is_set (PIND , 0 ) ) {
        PORTB ^= 1;
        delay( 100 );
        wdt_reset();
    }
    t=27466;
    Wait_Turbo = 20;
    for (;;){
        if ( t > 0 )
            PORTB ^= 1; //Kontrollsignaal pommile
        delay( 100 );
        if ( (t / 20) % 2) set_bit( PORTB , 6 ); else clear_bit( PORTB , 6 );
        if ( (t / 27) % 2) set_bit( PORTC , 5 ); else clear_bit( PORTC , 5 );
        if ( safe < 100 ) safe++;
        if ( is_set( PIND , 7 ) || !is_set(PIND , 2 ) ) safe=0;
        if ( is_set( PIND , 1 ) ) Turbo( 1 );
        if ( is_set( PIND , 3 ) ) Turbo( 2 );
        if ( !is_set( PIND , 4 ) ) Turbo( 3 );
        if ( is_set( PIND , 5 ) ) Turbo( 4 );
        if ( is_set( PINC , 0 ) ) Turbo( 5 );
        if ( is_set( PINC , 2 ) ) Turbo( 6 );
        if ( is_set( PINC , 3 ) ) Turbo( 7 );
        if ( !is_set( PIND , 0 ) ) {
            if ( !Wait_Turbo )
                speed *= 2; //Tempo magnificooooo!!!!
            Wait_Turbo = 10;
        }
        WriteNum(t * 512 / 15625,3);
        wdt_reset();
    }
}