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ATTINY85 – flash multiple LEDs

Similar to our previous example when we flashed a single LED, in this case we connect 3 LEDs up to Pin 5, 6 and 7 which are PB0,1 and 2. We will then flash 3 LEDs

Here is the schematic for this example

Schematic

attiny85 three LEDs

attiny85 three LEDs

Source

Again this was written in Atmel Studio

 

[codesyntax lang=”c” lines=”normal”]

#include <avr/io.h>
#define F_CPU 1000000UL
#include <util/delay.h>
int main (void)
{
// port B pins 0, 1, 2 as output
DDRB = (1 << PB2) | (1 << PB1) | (1 << PB0);

unsigned int i = 0;
while(1)
{
PORTB = i & ( (1 << PB2) | (1 << PB1) | (1 << PB0) );

i = (i+1) % 8;

_delay_ms( 500 );
}
}

[/codesyntax]

 

 

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tinyAVR

Attiny85 – Flash an LED

The hello world of examples this time for an ATTINY85, although this should work with similar chips as well. We will connect the LED to pin 2 (PB3) and simply flash it on and off.

Here is our schematic

Schematic

attiny85 Basic LED

attiny85 Basic LED

 

Code

The code was written in Atmel Studio

 

[codesyntax lang=”c” lines=”normal”]

#include <avr/io.h>
#define F_CPU 1000000UL
#include <util/delay.h>
// Define the I/O port to be used for the LED.
#define LED_PORT PB3

int main(void) {

// Set the LED port number as output.
DDRB |= (1 << LED_PORT);

// Start infinite loop.
while (1)
{

// Set the LED bit to "1" - LED will be "on".
PORTB |= (1 << LED_PORT);
// The delay function simply does N-number of "empty" loops.
_delay_ms(200);
// Set the LED bit to "0" - LED will be "off".
PORTB &= ~(1 << LED_PORT);
_delay_ms(400);
}

return (0);
}

[/codesyntax]

 

And another way to do the same task

 

[codesyntax lang=”c” lines=”normal”]

#include <avr/io.h>
#define F_CPU 1000000UL
#include <util/delay.h>

// Define the I/O port to be used for the LED.
#define LED_PORT PB3

int main(void) {

// Set the LED port number as output.
DDRB |= (1 << LED_PORT);

// Start infinite loop.
while (1)
{

// Set the LED bit to "1" - LED will be "on".
PORTB |= (1 << LED_PORT);
// The delay function simply does N-number of "empty" loops.
_delay_ms(200);
// Set the LED bit to "0" - LED will be "off".
PORTB &= ~(1 << LED_PORT);
_delay_ms(400);
}

return (0);
}

[/codesyntax]
Links

 

Free shipping 10PCS ATTINY85

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