switch action

TO TEST

// switch action

#define F_CPU 16000000UL // Define software reference clock for delay duration

// Must be write before call delay.h

#include <avr/io.h>

#include <util/delay.h>

#define SWT PB4 // Define switch pin on PB4

#define LED PORTD // Define LED on 8 bits PORTD

int main(void) {

int x = 0 ;

DDRB &= ~(1<<SWT); // Set input direction on SWT (PB2) *1

DDRD = 0xFF; // Set output direction on PORTB

for (;;) // Endless loop

{

if (bit_is_clear(PINB, SWT)) // Read SWT pin (if SWT pressed, do the loop one time)

{

LED = x; // show 8 leds x value

x++; // x + 1

if ( x > 255 ) x = 0 ; // when 256 return to 0

_delay_ms (500); // blinking delay

}

}

return 0;

}