1.3 KiB
Executable File
1.3 KiB
Executable File
Cut and paste the following into a file called LED_Demo.c
/* Blinker Demo */
#include <avr/io.h> /* Defines pins, ports, etc */
#define F_CPU 8000000UL /* Sets up the chip speed for delay.h */
#include <util/delay.h> /* Functions to waste time */
#define LED PB0 /* Defines pin PB0 for the LED. I
often include a bunch of the circuit
info in the code this way, which
makes porting the code to another
chip easier and reminds you of how to
hook it up. */
void main(void){
DDRB = _BV(LED); /* Data Direction Register B:
writing a one to the bit
enables output. More on the
_BV() macro in the next
lesson. */
while(1){ /* the main loop, from which we never return */
PORTB = _BV(LED); /* Turn on the LED bit/pin in PORTB */
_delay_ms(400); /* wait */
PORTB = 0; /* Turn off everything(!) on PORTB */
_delay_ms(400); /* wait */
}
}