35 lines
1.2 KiB
Markdown
Executable File
35 lines
1.2 KiB
Markdown
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 */
|
|
|
|
}
|
|
}
|
|
|
|
[Category:Microcontrollers](Category:Microcontrollers "wikilink") |