Datasheet

ManualsBrandsRaspberry Pi ManualsDevelopment Boards & KitsAdd on board RPI - Arduino

20 | Page

oldd = PORTD;

PORTB = 0xFF;

PORTD = 0xFF;

delay_ms(1);

PORTB = oldb;

PORTD = oldd;

d--;

}

else

{ if ((PINC & 0b00000100)==0)

d--;

else

delay_ms(1);

} // if button pressed

} // if button pressed

} // delay

int main(void)

{ // int b;

// Set all LED connections to output

DDRB = 0b00100110;

DDRD = 0b01101000;

PORTB = 0x00;

PORTD = 0x00;

// Set button (port C) to input

DDRC = 0b00000000;

// pull-up on C2 & C3:

PORTC = 0b00001100;

while(1)

{ // convoluted but simple walk the leds

output_high(PORTB,5);

delay();

output_low (PORTB,5);

output_high(PORTB,1);

delay();

output_low (PORTB,1);

output_high(PORTB,2);

delay();

output_low (PORTB,2);

output_high(PORTD,3);

delay();

output_low (PORTD,3);

output_high(PORTD,5);

delay();

output_low (PORTD,5);

output_high(PORTD,6);

delay();

output_low (PORTD,6);

output_high(PORTD,5);

delay();

output_low (PORTD,5);

output_high(PORTD,3);

delay();

output_low (PORTD,3);

output_high(PORTB,2);