avr-inkjet.c

#include <avr/io.h>
#include <util/delay.h>

void inkjet_init(){
    PORTB &= ~0x07; //0000 0218
    DDRB |= 0x07;

    PORTC &= ~0x3e; //0076 5430
    DDRC |= 0x3e;

    PORTD &= ~0xf0; //9abc 0000
    DDRD |= 0xf0;
}
void inkjet_print(unsigned int data){
    char bit;

    bit = (data >> 0) & 0x01;
    PORTB |= bit << 1;
    _delay_us(6);
    PORTB &= ~0x07;
    _delay_us(0.5);

    bit = (data >> 1) & 0x01;
    PORTC |= bit << 1;
    _delay_us(6);
    PORTC &= ~0x3e;
    _delay_us(0.5);

    bit = (data >> 2) & 0x01;
    PORTB |= bit << 2;
    _delay_us(6);
    PORTB &= ~0x07;
    _delay_us(0.5);

    bit = (data >> 3) & 0x01;
    PORTC |= bit << 2;
    _delay_us(6);
    PORTC &= ~0x3e;
    _delay_us(0.5);

    bit = (data >> 4) & 0x01;
    PORTC |= bit << 3;
    _delay_us(6);
    PORTC &= ~0x3e;
    _delay_us(0.5);

    bit = (data >> 5) & 0x01;
    PORTC |= bit << 4;
    _delay_us(6);
    PORTC &= ~0x3e;
    _delay_us(0.5);

    bit = (data >> 6) & 0x01;
    PORTC |= bit << 5;
    _delay_us(6);
    PORTC &= ~0x3e;
    _delay_us(0.5);

    bit = (data >> 7) & 0x01;
    PORTB |= bit << 0;
    _delay_us(6);
    PORTB &= ~0x07;
    _delay_us(0.5);

    bit = (data >> 8) & 0x01;
    PORTD |= bit << 7;
    _delay_us(6);
    PORTD &= ~0xf0;
    _delay_us(0.5);

    bit = (data >> 9) & 0x01;
    PORTD |= bit << 6;
    _delay_us(6);
    PORTD &= ~0xf0;
    _delay_us(0.5);

    bit = (data >> 10) & 0x01;
    PORTD |= bit << 5;
    _delay_us(6);
    PORTD &= ~0xf0;
    _delay_us(0.5);

    bit = (data >> 11) & 0x01;
    PORTD |= bit << 4;
    _delay_us(6);
    PORTD &= ~0xf0;
    _delay_us(0.5);

    _delay_us(800-78);
}

int main(void)
{
    inkjet_init();

    for(;;){
        _delay_ms(1000);
        inkjet_print(0x01e0); //0001 1110 0000
        inkjet_print(0x07f8); //0111 1111 1000
        inkjet_print(0x0ffa); //1111 1111 1100
        inkjet_print(0x0ffa); //1111 1111 1100
        inkjet_print(0x03fe); //0011 1111 1110
        inkjet_print(0x007f); //0000 0111 1111
        inkjet_print(0x03fe); //0011 1111 1110
        inkjet_print(0x0ffa); //1111 1111 1100
        inkjet_print(0x0ffa); //1111 1111 1100
        inkjet_print(0x07f8); //0111 1111 1000
        inkjet_print(0x01e0); //0001 1110 0000
    }

    return 0;
}