Attiny2313 and PWM led example
In this example we connect an LED to PB2 (Pin 14) of an Attiny 2313. The PWM output is obtained from the OC0A output of timer/counter0.
Schematic
attiny2313 pwm led
Code
Avr studio code example
#define F_CPU 1000000UL
#include <avr/io.h>
#include <util/delay.h>
int main(void)
{
DDRB |= (1 << PB2); // PWM output on PB2
TCCR0A = (1 << COM0A1) | (1 << WGM00); // phase correct PWM mode
OCR0A = 0x10; // initial PWM pulse width
TCCR0B = (1 << CS01); // clock source = CLK/8, start PWM
while(1)
{
// change PWM pulse width every 2 seconds
_delay_ms(2000);
OCR0A = 0x5;
_delay_ms(2000);
OCR0A = 0x10;
_delay_ms(2000);
OCR0A = 0x30;
_delay_ms(2000);
OCR0A = 0x50;
_delay_ms(2000);
OCR0A = 0xA0;
_delay_ms(2000);
OCR0A = 0xFF;
}
}
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